211 files changed, 1768 insertions, 1746 deletions

diff --git a/src/AllocationPool.h b/src/AllocationPool.h
index 61431a548..7c358cc84 100644
--- a/src/AllocationPool.h
+++ b/src/AllocationPool.h
@@ -45,7 +45,7 @@ class cListAllocationPool : public cAllocationPool<T>
 			for (size_t i = 0; i < NumElementsInReserve; i++)
 			{
 				void * space = malloc(sizeof(T));
-				if (space == NULL)
+				if (space == nullptr)
 				{
 					m_Callbacks->OnStartUsingReserve();
 					break;
@@ -68,7 +68,7 @@ class cListAllocationPool : public cAllocationPool<T>
 			if (m_FreeList.size() <= NumElementsInReserve)
 			{
 				void * space = malloc(sizeof(T));
-				if (space != NULL)
+				if (space != nullptr)
 				{
 					return new(space) T;
 				}
@@ -90,7 +90,7 @@ class cListAllocationPool : public cAllocationPool<T>
 		}
 		virtual void Free(T * a_ptr) override
 		{
-			if (a_ptr == NULL)
+			if (a_ptr == nullptr)
 			{
 				return;
 			}
diff --git a/src/Bindings/DeprecatedBindings.cpp b/src/Bindings/DeprecatedBindings.cpp
index 02aa15be4..ded7a0142 100644
--- a/src/Bindings/DeprecatedBindings.cpp
+++ b/src/Bindings/DeprecatedBindings.cpp
@@ -29,7 +29,7 @@ static int tolua_get_AllToLua_g_BlockLightValue(lua_State* tolua_S)
 	BlockType = (int)tolua_tonumber(tolua_S, 2, 0);
 	if ((BlockType < 0) || (BlockType > E_BLOCK_MAX_TYPE_ID))
 	{
-		tolua_error(tolua_S, "array indexing out of range.", NULL);
+		tolua_error(tolua_S, "array indexing out of range.", nullptr);
 	}
 	tolua_pushnumber(tolua_S, (lua_Number)cBlockInfo::GetLightValue((BLOCKTYPE)BlockType));
 	return 1;
@@ -55,7 +55,7 @@ static int tolua_get_AllToLua_g_BlockSpreadLightFalloff(lua_State* tolua_S)
 	BlockType = (int)tolua_tonumber(tolua_S, 2, 0);
 	if ((BlockType < 0) || (BlockType > E_BLOCK_MAX_TYPE_ID))
 	{
-		tolua_error(tolua_S, "array indexing out of range.", NULL);
+		tolua_error(tolua_S, "array indexing out of range.", nullptr);
 	}
 	tolua_pushnumber(tolua_S, (lua_Number)cBlockInfo::GetSpreadLightFalloff((BLOCKTYPE)BlockType));
 	return 1;
@@ -81,7 +81,7 @@ static int tolua_get_AllToLua_g_BlockTransparent(lua_State* tolua_S)
 	BlockType = (int)tolua_tonumber(tolua_S, 2, 0);
 	if ((BlockType < 0) || (BlockType > E_BLOCK_MAX_TYPE_ID))
 	{
-		tolua_error(tolua_S, "array indexing out of range.", NULL);
+		tolua_error(tolua_S, "array indexing out of range.", nullptr);
 	}
 	tolua_pushboolean(tolua_S, cBlockInfo::IsTransparent((BLOCKTYPE)BlockType));
 	return 1;
@@ -107,7 +107,7 @@ static int tolua_get_AllToLua_g_BlockOneHitDig(lua_State* tolua_S)
 	BlockType = (int)tolua_tonumber(tolua_S, 2, 0);
 	if ((BlockType < 0) || (BlockType > E_BLOCK_MAX_TYPE_ID))
 	{
-		tolua_error(tolua_S, "array indexing out of range.", NULL);
+		tolua_error(tolua_S, "array indexing out of range.", nullptr);
 	}
 	tolua_pushboolean(tolua_S, cBlockInfo::IsOneHitDig((BLOCKTYPE)BlockType));
 	return 1;
@@ -133,7 +133,7 @@ static int tolua_get_AllToLua_g_BlockPistonBreakable(lua_State* tolua_S)
 	BlockType = (int)tolua_tonumber(tolua_S, 2, 0);
 	if ((BlockType < 0) || (BlockType > E_BLOCK_MAX_TYPE_ID))
 	{
-		tolua_error(tolua_S, "array indexing out of range.", NULL);
+		tolua_error(tolua_S, "array indexing out of range.", nullptr);
 	}
 	tolua_pushboolean(tolua_S, cBlockInfo::IsPistonBreakable((BLOCKTYPE)BlockType));
 	return 1;
@@ -159,7 +159,7 @@ static int tolua_get_AllToLua_g_BlockIsSnowable(lua_State* tolua_S)
 	BlockType = (int)tolua_tonumber(tolua_S, 2, 0);
 	if ((BlockType < 0) || (BlockType > E_BLOCK_MAX_TYPE_ID))
 	{
-		tolua_error(tolua_S, "array indexing out of range.", NULL);
+		tolua_error(tolua_S, "array indexing out of range.", nullptr);
 	}
 	tolua_pushboolean(tolua_S, cBlockInfo::IsSnowable((BLOCKTYPE)BlockType));
 	return 1;
@@ -185,7 +185,7 @@ static int tolua_get_AllToLua_g_BlockIsSolid(lua_State* tolua_S)
 	BlockType = (int)tolua_tonumber(tolua_S, 2, 0);
 	if ((BlockType < 0) || (BlockType > E_BLOCK_MAX_TYPE_ID))
 	{
-		tolua_error(tolua_S, "array indexing out of range.", NULL);
+		tolua_error(tolua_S, "array indexing out of range.", nullptr);
 	}
 	tolua_pushboolean(tolua_S, (bool)cBlockInfo::IsSolid((BLOCKTYPE)BlockType));
 	return 1;
@@ -211,7 +211,7 @@ static int tolua_get_AllToLua_g_BlockFullyOccupiesVoxel(lua_State* tolua_S)
 	BlockType = (int)tolua_tonumber(tolua_S, 2, 0);
 	if ((BlockType < 0) || (BlockType > E_BLOCK_MAX_TYPE_ID))
 	{
-		tolua_error(tolua_S, "array indexing out of range.", NULL);
+		tolua_error(tolua_S, "array indexing out of range.", nullptr);
 	}
 	tolua_pushboolean(tolua_S, (bool)cBlockInfo::FullyOccupiesVoxel((BLOCKTYPE)BlockType));
 	return 1;
@@ -224,16 +224,16 @@ static int tolua_get_AllToLua_g_BlockFullyOccupiesVoxel(lua_State* tolua_S)
 
 void DeprecatedBindings::Bind(lua_State * tolua_S)
 {
-	tolua_beginmodule(tolua_S, NULL);
-
-	tolua_array(tolua_S, "g_BlockLightValue",          tolua_get_AllToLua_g_BlockLightValue,          NULL);
-	tolua_array(tolua_S, "g_BlockSpreadLightFalloff",  tolua_get_AllToLua_g_BlockSpreadLightFalloff,  NULL);
-	tolua_array(tolua_S, "g_BlockTransparent",         tolua_get_AllToLua_g_BlockTransparent,         NULL);
-	tolua_array(tolua_S, "g_BlockOneHitDig",           tolua_get_AllToLua_g_BlockOneHitDig,           NULL);
-	tolua_array(tolua_S, "g_BlockPistonBreakable",     tolua_get_AllToLua_g_BlockPistonBreakable,     NULL);
-	tolua_array(tolua_S, "g_BlockIsSnowable",          tolua_get_AllToLua_g_BlockIsSnowable,          NULL);
-	tolua_array(tolua_S, "g_BlockIsSolid",             tolua_get_AllToLua_g_BlockIsSolid,             NULL);
-	tolua_array(tolua_S, "g_BlockFullyOccupiesVoxel",  tolua_get_AllToLua_g_BlockFullyOccupiesVoxel,  NULL);
+	tolua_beginmodule(tolua_S, nullptr);
+
+	tolua_array(tolua_S, "g_BlockLightValue",          tolua_get_AllToLua_g_BlockLightValue,          nullptr);
+	tolua_array(tolua_S, "g_BlockSpreadLightFalloff",  tolua_get_AllToLua_g_BlockSpreadLightFalloff,  nullptr);
+	tolua_array(tolua_S, "g_BlockTransparent",         tolua_get_AllToLua_g_BlockTransparent,         nullptr);
+	tolua_array(tolua_S, "g_BlockOneHitDig",           tolua_get_AllToLua_g_BlockOneHitDig,           nullptr);
+	tolua_array(tolua_S, "g_BlockPistonBreakable",     tolua_get_AllToLua_g_BlockPistonBreakable,     nullptr);
+	tolua_array(tolua_S, "g_BlockIsSnowable",          tolua_get_AllToLua_g_BlockIsSnowable,          nullptr);
+	tolua_array(tolua_S, "g_BlockIsSolid",             tolua_get_AllToLua_g_BlockIsSolid,             nullptr);
+	tolua_array(tolua_S, "g_BlockFullyOccupiesVoxel",  tolua_get_AllToLua_g_BlockFullyOccupiesVoxel,  nullptr);
 
 	tolua_endmodule(tolua_S);
 }
diff --git a/src/Bindings/LuaChunkStay.cpp b/src/Bindings/LuaChunkStay.cpp
index 23da12f68..e50ffb75b 100644
--- a/src/Bindings/LuaChunkStay.cpp
+++ b/src/Bindings/LuaChunkStay.cpp
@@ -13,7 +13,7 @@
 
 cLuaChunkStay::cLuaChunkStay(cPluginLua & a_Plugin) :
 	m_Plugin(a_Plugin),
-	m_LuaState(NULL)
+	m_LuaState(nullptr)
 {
 }
 
diff --git a/src/Bindings/LuaState.cpp b/src/Bindings/LuaState.cpp
index f8e026061..2f5d173fd 100644
--- a/src/Bindings/LuaState.cpp
+++ b/src/Bindings/LuaState.cpp
@@ -46,7 +46,7 @@ const cLuaState::cRet cLuaState::Return = {};
 // cLuaState:
 
 cLuaState::cLuaState(const AString & a_SubsystemName) :
-	m_LuaState(NULL),
+	m_LuaState(nullptr),
 	m_IsOwned(false),
 	m_SubsystemName(a_SubsystemName),
 	m_NumCurrentFunctionArgs(-1)
@@ -90,7 +90,7 @@ cLuaState::~cLuaState()
 
 void cLuaState::Create(void)
 {
-	if (m_LuaState != NULL)
+	if (m_LuaState != nullptr)
 	{
 		LOGWARNING("%s: Trying to create an already-existing LuaState, ignoring.", __FUNCTION__);
 		return;
@@ -119,7 +119,7 @@ void cLuaState::RegisterAPILibs(void)
 
 void cLuaState::Close(void)
 {
-	if (m_LuaState == NULL)
+	if (m_LuaState == nullptr)
 	{
 		LOGWARNING("%s: Trying to close an invalid LuaState, ignoring.", __FUNCTION__);
 		return;
@@ -134,7 +134,7 @@ void cLuaState::Close(void)
 		return;
 	}
 	lua_close(m_LuaState);
-	m_LuaState = NULL;
+	m_LuaState = nullptr;
 	m_IsOwned = false;
 }
 
@@ -144,7 +144,7 @@ void cLuaState::Close(void)
 
 void cLuaState::Attach(lua_State * a_State)
 {
-	if (m_LuaState != NULL)
+	if (m_LuaState != nullptr)
 	{
 		LOGINFO("%s: Already contains a LuaState (0x%p), will be closed / detached.", __FUNCTION__, m_LuaState);
 		if (m_IsOwned)
@@ -166,7 +166,7 @@ void cLuaState::Attach(lua_State * a_State)
 
 void cLuaState::Detach(void)
 {
-	if (m_LuaState == NULL)
+	if (m_LuaState == nullptr)
 	{
 		return;
 	}
@@ -179,7 +179,7 @@ void cLuaState::Detach(void)
 		Close();
 		return;
 	}
-	m_LuaState = NULL;
+	m_LuaState = nullptr;
 }
 
 
@@ -869,7 +869,7 @@ void cLuaState::GetStackValue(int a_StackPos, AString & a_Value)
 {
 	size_t len = 0;
 	const char * data = lua_tolstring(m_LuaState, a_StackPos, &len);
-	if (data != NULL)
+	if (data != nullptr)
 	{
 		a_Value.assign(data, len);
 	}
@@ -919,7 +919,7 @@ void cLuaState::GetStackValue(int a_StackPos, pBoundingBox & a_ReturnedVal)
 {
 	if (lua_isnil(m_LuaState, a_StackPos))
 	{
-		a_ReturnedVal = NULL;
+		a_ReturnedVal = nullptr;
 		return;
 	}
 	tolua_Error err;
@@ -937,7 +937,7 @@ void cLuaState::GetStackValue(int a_StackPos, pWorld & a_ReturnedVal)
 {
 	if (lua_isnil(m_LuaState, a_StackPos))
 	{
-		a_ReturnedVal = NULL;
+		a_ReturnedVal = nullptr;
 		return;
 	}
 	tolua_Error err;
@@ -1002,7 +1002,7 @@ bool cLuaState::CheckParamUserTable(int a_StartParam, const char * a_UserTable,
 		lua_Debug entry;
 		VERIFY(lua_getstack(m_LuaState, 0,   &entry));
 		VERIFY(lua_getinfo (m_LuaState, "n", &entry));
-		AString ErrMsg = Printf("#ferror in function '%s'.", (entry.name != NULL) ? entry.name : "?");
+		AString ErrMsg = Printf("#ferror in function '%s'.", (entry.name != nullptr) ? entry.name : "?");
 		tolua_error(m_LuaState, ErrMsg.c_str(), &tolua_err);
 		return false;
 	}  // for i - Param
@@ -1035,7 +1035,7 @@ bool cLuaState::CheckParamUserType(int a_StartParam, const char * a_UserType, in
 		lua_Debug entry;
 		VERIFY(lua_getstack(m_LuaState, 0,   &entry));
 		VERIFY(lua_getinfo (m_LuaState, "n", &entry));
-		AString ErrMsg = Printf("#ferror in function '%s'.", (entry.name != NULL) ? entry.name : "?");
+		AString ErrMsg = Printf("#ferror in function '%s'.", (entry.name != nullptr) ? entry.name : "?");
 		tolua_error(m_LuaState, ErrMsg.c_str(), &tolua_err);
 		return false;
 	}  // for i - Param
@@ -1068,7 +1068,7 @@ bool cLuaState::CheckParamTable(int a_StartParam, int a_EndParam)
 		lua_Debug entry;
 		VERIFY(lua_getstack(m_LuaState, 0,   &entry));
 		VERIFY(lua_getinfo (m_LuaState, "n", &entry));
-		AString ErrMsg = Printf("#ferror in function '%s'.", (entry.name != NULL) ? entry.name : "?");
+		AString ErrMsg = Printf("#ferror in function '%s'.", (entry.name != nullptr) ? entry.name : "?");
 		tolua_error(m_LuaState, ErrMsg.c_str(), &tolua_err);
 		return false;
 	}  // for i - Param
@@ -1101,7 +1101,7 @@ bool cLuaState::CheckParamNumber(int a_StartParam, int a_EndParam)
 		lua_Debug entry;
 		VERIFY(lua_getstack(m_LuaState, 0,   &entry));
 		VERIFY(lua_getinfo (m_LuaState, "n", &entry));
-		AString ErrMsg = Printf("#ferror in function '%s'.", (entry.name != NULL) ? entry.name : "?");
+		AString ErrMsg = Printf("#ferror in function '%s'.", (entry.name != nullptr) ? entry.name : "?");
 		tolua_error(m_LuaState, ErrMsg.c_str(), &tolua_err);
 		return false;
 	}  // for i - Param
@@ -1134,7 +1134,7 @@ bool cLuaState::CheckParamString(int a_StartParam, int a_EndParam)
 		lua_Debug entry;
 		VERIFY(lua_getstack(m_LuaState, 0,   &entry));
 		VERIFY(lua_getinfo (m_LuaState, "n", &entry));
-		AString ErrMsg = Printf("#ferror in function '%s'.", (entry.name != NULL) ? entry.name : "?");
+		AString ErrMsg = Printf("#ferror in function '%s'.", (entry.name != nullptr) ? entry.name : "?");
 		tolua_error(m_LuaState, ErrMsg.c_str(), &tolua_err);
 		return false;
 	}  // for i - Param
@@ -1167,7 +1167,7 @@ bool cLuaState::CheckParamFunction(int a_StartParam, int a_EndParam)
 		VERIFY(lua_getstack(m_LuaState, 0,   &entry));
 		VERIFY(lua_getinfo (m_LuaState, "n", &entry));
 		luaL_error(m_LuaState, "Error in function '%s' parameter #%d. Function expected, got %s",
-			(entry.name != NULL) ? entry.name : "?", i, GetTypeText(i).c_str()
+			(entry.name != nullptr) ? entry.name : "?", i, GetTypeText(i).c_str()
 		);
 		return false;
 	}  // for i - Param
@@ -1200,7 +1200,7 @@ bool cLuaState::CheckParamFunctionOrNil(int a_StartParam, int a_EndParam)
 		VERIFY(lua_getstack(m_LuaState, 0,   &entry));
 		VERIFY(lua_getinfo (m_LuaState, "n", &entry));
 		luaL_error(m_LuaState, "Error in function '%s' parameter #%d. Function expected, got %s",
-			(entry.name != NULL) ? entry.name : "?", i, GetTypeText(i).c_str()
+			(entry.name != nullptr) ? entry.name : "?", i, GetTypeText(i).c_str()
 		);
 		return false;
 	}  // for i - Param
@@ -1224,7 +1224,7 @@ bool cLuaState::CheckParamEnd(int a_Param)
 	lua_Debug entry;
 	VERIFY(lua_getstack(m_LuaState, 0,   &entry));
 	VERIFY(lua_getinfo (m_LuaState, "n", &entry));
-	AString ErrMsg = Printf("#ferror in function '%s': Too many arguments.", (entry.name != NULL) ? entry.name : "?");
+	AString ErrMsg = Printf("#ferror in function '%s': Too many arguments.", (entry.name != nullptr) ? entry.name : "?");
 	tolua_error(m_LuaState, ErrMsg.c_str(), &tolua_err);
 	return false;
 }
@@ -1403,7 +1403,7 @@ int cLuaState::CopyStackFrom(cLuaState & a_SrcLuaState, int a_SrcStart, int a_Sr
 			case LUA_TUSERDATA:
 			{
 				// Get the class name:
-				const char * type = NULL;
+				const char * type = nullptr;
 				if (lua_getmetatable(a_SrcLuaState, i) == 0)
 				{
 					LOGWARNING("%s: Unknown class in pos %d, cannot copy.", __FUNCTION__, i);
@@ -1415,7 +1415,7 @@ int cLuaState::CopyStackFrom(cLuaState & a_SrcLuaState, int a_SrcStart, int a_Sr
 				lua_pop(a_SrcLuaState, 1);                     // Stack -1
 				
 				// Copy the value:
-				void * ud = tolua_touserdata(a_SrcLuaState, i, NULL);
+				void * ud = tolua_touserdata(a_SrcLuaState, i, nullptr);
 				tolua_pushusertype(m_LuaState, ud, type);
 				break;
 			}
@@ -1441,7 +1441,7 @@ void cLuaState::ToString(int a_StackPos, AString & a_String)
 {
 	size_t len;
 	const char * s = lua_tolstring(m_LuaState, a_StackPos, &len);
-	if (s != NULL)
+	if (s != nullptr)
 	{
 		a_String.assign(s, len);
 	}
@@ -1463,7 +1463,7 @@ void cLuaState::LogStack(const char * a_Header)
 void cLuaState::LogStack(lua_State * a_LuaState, const char * a_Header)
 {
 	// Format string consisting only of %s is used to appease the compiler
-	LOG("%s", (a_Header != NULL) ? a_Header : "Lua C API Stack contents:");
+	LOG("%s", (a_Header != nullptr) ? a_Header : "Lua C API Stack contents:");
 	for (int i = lua_gettop(a_LuaState); i > 0; i--)
 	{
 		AString Value;
@@ -1500,7 +1500,7 @@ int cLuaState::ReportFnCallErrors(lua_State * a_LuaState)
 // cLuaState::cRef:
 
 cLuaState::cRef::cRef(void) :
-	m_LuaState(NULL),
+	m_LuaState(nullptr),
 	m_Ref(LUA_REFNIL)
 {
 }
@@ -1510,7 +1510,7 @@ cLuaState::cRef::cRef(void) :
 
 
 cLuaState::cRef::cRef(cLuaState & a_LuaState, int a_StackPos) :
-	m_LuaState(NULL),
+	m_LuaState(nullptr),
 	m_Ref(LUA_REFNIL)
 {
 	RefStack(a_LuaState, a_StackPos);
@@ -1522,7 +1522,7 @@ cLuaState::cRef::cRef(cLuaState & a_LuaState, int a_StackPos) :
 
 cLuaState::cRef::~cRef()
 {
-	if (m_LuaState != NULL)
+	if (m_LuaState != nullptr)
 	{
 		UnRef();
 	}
@@ -1535,7 +1535,7 @@ cLuaState::cRef::~cRef()
 void cLuaState::cRef::RefStack(cLuaState & a_LuaState, int a_StackPos)
 {
 	ASSERT(a_LuaState.IsValid());
-	if (m_LuaState != NULL)
+	if (m_LuaState != nullptr)
 	{
 		UnRef();
 	}
@@ -1556,7 +1556,7 @@ void cLuaState::cRef::UnRef(void)
 	{
 		luaL_unref(*m_LuaState, LUA_REGISTRYINDEX, m_Ref);
 	}
-	m_LuaState = NULL;
+	m_LuaState = nullptr;
 	m_Ref = LUA_REFNIL;
 }
 
diff --git a/src/Bindings/LuaState.h b/src/Bindings/LuaState.h
index 899228a66..d1e9923b4 100644
--- a/src/Bindings/LuaState.h
+++ b/src/Bindings/LuaState.h
@@ -164,7 +164,7 @@ public:
 	void Detach(void);
 	
 	/** Returns true if the m_LuaState is valid */
-	bool IsValid(void) const { return (m_LuaState != NULL); }
+	bool IsValid(void) const { return (m_LuaState != nullptr); }
 	
 	/** Adds the specified path to package.<a_PathVariable> */
 	void AddPackagePath(const AString & a_PathVariable, const AString & a_Path);
@@ -318,10 +318,10 @@ public:
 	void ToString(int a_StackPos, AString & a_String);
 
 	/** Logs all the elements' types on the API stack, with an optional header for the listing. */
-	void LogStack(const char * a_Header = NULL);
+	void LogStack(const char * a_Header = nullptr);
 	
 	/** Logs all the elements' types on the API stack, with an optional header for the listing. */
-	static void LogStack(lua_State * a_LuaState, const char * a_Header = NULL);
+	static void LogStack(lua_State * a_LuaState, const char * a_Header = nullptr);
 	
 protected:
 
diff --git a/src/Bindings/LuaWindow.cpp b/src/Bindings/LuaWindow.cpp
index c4d03b86b..35730878d 100644
--- a/src/Bindings/LuaWindow.cpp
+++ b/src/Bindings/LuaWindow.cpp
@@ -18,7 +18,7 @@
 cLuaWindow::cLuaWindow(cWindow::WindowType a_WindowType, int a_SlotsX, int a_SlotsY, const AString & a_Title) :
 	super(a_WindowType, a_Title),
 	m_Contents(a_SlotsX, a_SlotsY),
-	m_Plugin(NULL),
+	m_Plugin(nullptr),
 	m_LuaRef(LUA_REFNIL),
 	m_OnClosingFnRef(LUA_REFNIL),
 	m_OnSlotChangedFnRef(LUA_REFNIL)
@@ -70,7 +70,7 @@ cLuaWindow::~cLuaWindow()
 void cLuaWindow::SetLuaRef(cPluginLua * a_Plugin, int a_LuaRef)
 {
 	// Either m_Plugin is not set or equal to the passed plugin; only one plugin can use one cLuaWindow object
-	ASSERT((m_Plugin == NULL) || (m_Plugin == a_Plugin));
+	ASSERT((m_Plugin == nullptr) || (m_Plugin == a_Plugin));
 	ASSERT(m_LuaRef == LUA_REFNIL);
 	m_Plugin = a_Plugin;
 	m_LuaRef = a_LuaRef;
@@ -82,7 +82,7 @@ void cLuaWindow::SetLuaRef(cPluginLua * a_Plugin, int a_LuaRef)
 
 bool cLuaWindow::IsLuaReferenced(void) const
 {
-	return ((m_Plugin != NULL) && (m_LuaRef != LUA_REFNIL));
+	return ((m_Plugin != nullptr) && (m_LuaRef != LUA_REFNIL));
 }
 
 
@@ -92,7 +92,7 @@ bool cLuaWindow::IsLuaReferenced(void) const
 void cLuaWindow::SetOnClosing(cPluginLua * a_Plugin, int a_FnRef)
 {
 	// Either m_Plugin is not set or equal to the passed plugin; only one plugin can use one cLuaWindow object
-	ASSERT((m_Plugin == NULL) || (m_Plugin == a_Plugin));
+	ASSERT((m_Plugin == nullptr) || (m_Plugin == a_Plugin));
 	
 	// If there already was a function, unreference it first
 	if (m_OnClosingFnRef != LUA_REFNIL)
@@ -112,7 +112,7 @@ void cLuaWindow::SetOnClosing(cPluginLua * a_Plugin, int a_FnRef)
 void cLuaWindow::SetOnSlotChanged(cPluginLua * a_Plugin, int a_FnRef)
 {
 	// Either m_Plugin is not set or equal to the passed plugin; only one plugin can use one cLuaWindow object
-	ASSERT((m_Plugin == NULL) || (m_Plugin == a_Plugin));
+	ASSERT((m_Plugin == nullptr) || (m_Plugin == a_Plugin));
 	
 	// If there already was a function, unreference it first
 	if (m_OnSlotChangedFnRef != LUA_REFNIL)
@@ -134,7 +134,7 @@ bool cLuaWindow::ClosedByPlayer(cPlayer & a_Player, bool a_CanRefuse)
 	// First notify the plugin through the registered callback:
 	if (m_OnClosingFnRef != LUA_REFNIL)
 	{
-		ASSERT(m_Plugin != NULL);
+		ASSERT(m_Plugin != nullptr);
 		if (m_Plugin->CallbackWindowClosing(m_OnClosingFnRef, *this, a_Player, a_CanRefuse))
 		{
 			// The callback disagrees (the higher levels check the CanRefuse flag compliance)
@@ -153,7 +153,7 @@ void cLuaWindow::Destroy(void)
 {
 	super::Destroy();
 	
-	if ((m_LuaRef != LUA_REFNIL) && (m_Plugin != NULL))
+	if ((m_LuaRef != LUA_REFNIL) && (m_Plugin != nullptr))
 	{
 		// The object is referenced by Lua, un-reference it
 		m_Plugin->Unreference(m_LuaRef);
diff --git a/src/Bindings/ManualBindings.cpp b/src/Bindings/ManualBindings.cpp
index 0558533ce..a4a5d79b4 100644
--- a/src/Bindings/ManualBindings.cpp
+++ b/src/Bindings/ManualBindings.cpp
@@ -145,13 +145,13 @@ static AString GetLogMessage(lua_State * tolua_S)
 	tolua_Error err;
 	if (tolua_isusertype(tolua_S, 1, "cCompositeChat", false, &err))
 	{
-		return ((cCompositeChat *)tolua_tousertype(tolua_S, 1, NULL))->ExtractText();
+		return ((cCompositeChat *)tolua_tousertype(tolua_S, 1, nullptr))->ExtractText();
 	}
 	else
 	{
 		size_t len = 0;
 		const char * str = lua_tolstring(tolua_S, 1, &len);
-		if (str != NULL)
+		if (str != nullptr)
 		{
 			return AString(str, len);
 		}
@@ -170,7 +170,7 @@ static int tolua_LOG(lua_State * tolua_S)
 	tolua_Error err;
 	if (tolua_isusertype(tolua_S, 1, "cCompositeChat", false, &err))
 	{
-		LogLevel = cCompositeChat::MessageTypeToLogLevel(((cCompositeChat *)tolua_tousertype(tolua_S, 1, NULL))->GetMessageType());
+		LogLevel = cCompositeChat::MessageTypeToLogLevel(((cCompositeChat *)tolua_tousertype(tolua_S, 1, nullptr))->GetMessageType());
 	}
 	
 	// Log the message:
@@ -264,7 +264,7 @@ static cPluginLua * GetLuaPlugin(lua_State * L)
 	{
 		LOGWARNING("%s: cannot get plugin instance, what have you done to my Lua state?", __FUNCTION__);
 		lua_pop(L, 1);
-		return NULL;
+		return nullptr;
 	}
 	cPluginLua * Plugin = (cPluginLua *)lua_topointer(L, -1);
 	lua_pop(L, 1);
@@ -312,10 +312,10 @@ static int tolua_DoWith(lua_State* tolua_S)
 		return lua_do_error(tolua_S, "Error in function call '#funcname#': Requires 2 or 3 arguments, got %i", NumArgs);
 	}
 
-	Ty1 * self = (Ty1 *)  tolua_tousertype(tolua_S, 1, NULL);
+	Ty1 * self = (Ty1 *)  tolua_tousertype(tolua_S, 1, nullptr);
 
 	const char * ItemName = tolua_tocppstring(tolua_S, 2, "");
-	if ((ItemName == NULL) || (ItemName[0] == 0))
+	if ((ItemName == nullptr) || (ItemName[0] == 0))
 	{
 		return lua_do_error(tolua_S, "Error in function call '#funcname#': Expected a non-empty string for parameter #1", NumArgs);
 	}
@@ -406,7 +406,7 @@ static int tolua_DoWithID(lua_State* tolua_S)
 		return lua_do_error(tolua_S, "Error in function call '#funcname#': Requires 2 or 3 arguments, got %i", NumArgs);
 	}
 
-	Ty1 * self = (Ty1 *)tolua_tousertype(tolua_S, 1, NULL);
+	Ty1 * self = (Ty1 *)tolua_tousertype(tolua_S, 1, nullptr);
 
 	int ItemID = (int)tolua_tonumber(tolua_S, 2, 0);
 	if (!lua_isfunction(tolua_S, 3))
@@ -496,7 +496,7 @@ static int tolua_DoWithXYZ(lua_State* tolua_S)
 		return lua_do_error(tolua_S, "Error in function call '#funcname#': Requires 4 or 5 arguments, got %i", NumArgs);
 	}
 
-	Ty1 * self = (Ty1 *)  tolua_tousertype(tolua_S, 1, NULL);
+	Ty1 * self = (Ty1 *)  tolua_tousertype(tolua_S, 1, nullptr);
 	if (!lua_isnumber(tolua_S, 2) || !lua_isnumber(tolua_S, 3) || !lua_isnumber(tolua_S, 4))
 	{
 		return lua_do_error(tolua_S, "Error in function call '#funcname#': Expected a number for parameters #1, #2 and #3");
@@ -591,7 +591,7 @@ static int tolua_ForEachInChunk(lua_State * tolua_S)
 		return lua_do_error(tolua_S, "Error in function call '#funcname#': Requires 3 or 4 arguments, got %i", NumArgs);
 	}
 
-	Ty1 * self = (Ty1 *)  tolua_tousertype(tolua_S, 1, NULL);
+	Ty1 * self = (Ty1 *)  tolua_tousertype(tolua_S, 1, nullptr);
 	if (!lua_isnumber(tolua_S, 2) || !lua_isnumber(tolua_S, 3))
 	{
 		return lua_do_error(tolua_S, "Error in function call '#funcname#': Expected a number for parameters #1 and #2");
@@ -694,10 +694,10 @@ static int tolua_ForEachInBox(lua_State * tolua_S)
 	}
 
 	// Get the params:
-	Ty1 * Self = NULL;
-	cBoundingBox * Box = NULL;
+	Ty1 * Self = nullptr;
+	cBoundingBox * Box = nullptr;
 	L.GetStackValues(1, Self, Box);
-	if ((Self == NULL) || (Box == NULL))
+	if ((Self == nullptr) || (Box == nullptr))
 	{
 		LOGWARNING("Invalid world (%p) or boundingbox (%p)", Self, Box);
 		L.LogStackTrace();
@@ -760,8 +760,8 @@ static int tolua_ForEach(lua_State * tolua_S)
 		return lua_do_error(tolua_S, "Error in function call '#funcname#': Requires 1 or 2 arguments, got %i", NumArgs);
 	}
 
-	Ty1 * self = (Ty1 *)tolua_tousertype(tolua_S, 1, NULL);
-	if (self == NULL)
+	Ty1 * self = (Ty1 *)tolua_tousertype(tolua_S, 1, nullptr);
+	if (self == nullptr)
 	{
 		return lua_do_error(tolua_S, "Error in function call '#funcname#': Not called on an object instance");
 	}
@@ -857,14 +857,14 @@ static int tolua_cWorld_GetBlockInfo(lua_State * tolua_S)
 	else
 	#endif
 	{
-		cWorld * self       = (cWorld *) tolua_tousertype (tolua_S, 1, NULL);
+		cWorld * self       = (cWorld *) tolua_tousertype (tolua_S, 1, nullptr);
 		int BlockX          = (int)      tolua_tonumber   (tolua_S, 2, 0);
 		int BlockY          = (int)      tolua_tonumber   (tolua_S, 3, 0);
 		int BlockZ          = (int)      tolua_tonumber   (tolua_S, 4, 0);
 		#ifndef TOLUA_RELEASE
-		if (self == NULL)
+		if (self == nullptr)
 		{
-			tolua_error(tolua_S, "invalid 'self' in function 'GetBlockInfo'", NULL);
+			tolua_error(tolua_S, "invalid 'self' in function 'GetBlockInfo'", nullptr);
 		}
 		#endif
 		{
@@ -912,14 +912,14 @@ static int tolua_cWorld_GetBlockTypeMeta(lua_State * tolua_S)
 	else
 	#endif
 	{
-		cWorld * self       = (cWorld *) tolua_tousertype (tolua_S, 1, NULL);
+		cWorld * self       = (cWorld *) tolua_tousertype (tolua_S, 1, nullptr);
 		int BlockX          = (int)      tolua_tonumber   (tolua_S, 2, 0);
 		int BlockY          = (int)      tolua_tonumber   (tolua_S, 3, 0);
 		int BlockZ          = (int)      tolua_tonumber   (tolua_S, 4, 0);
 		#ifndef TOLUA_RELEASE
-		if (self == NULL)
+		if (self == nullptr)
 		{
-			tolua_error(tolua_S, "invalid 'self' in function 'GetBlockTypeMeta'", NULL);
+			tolua_error(tolua_S, "invalid 'self' in function 'GetBlockTypeMeta'", nullptr);
 		}
 		#endif
 		{
@@ -964,14 +964,14 @@ static int tolua_cWorld_GetSignLines(lua_State * tolua_S)
 	else
 	#endif
 	{
-		cWorld * self       = (cWorld *) tolua_tousertype (tolua_S, 1, NULL);
+		cWorld * self       = (cWorld *) tolua_tousertype (tolua_S, 1, nullptr);
 		int BlockX          = (int)      tolua_tonumber   (tolua_S, 2, 0);
 		int BlockY          = (int)      tolua_tonumber   (tolua_S, 3, 0);
 		int BlockZ          = (int)      tolua_tonumber   (tolua_S, 4, 0);
 		#ifndef TOLUA_RELEASE
-		if (self == NULL)
+		if (self == nullptr)
 		{
-			tolua_error(tolua_S, "invalid 'self' in function 'GetSignLines'", NULL);
+			tolua_error(tolua_S, "invalid 'self' in function 'GetSignLines'", nullptr);
 		}
 		#endif
 		{
@@ -1022,7 +1022,7 @@ static int tolua_cWorld_SetSignLines(lua_State * tolua_S)
 	else
 	#endif
 	{
-		cWorld * self       = (cWorld *) tolua_tousertype (tolua_S, 1, NULL);
+		cWorld * self       = (cWorld *) tolua_tousertype (tolua_S, 1, nullptr);
 		int BlockX          = (int)      tolua_tonumber   (tolua_S, 2, 0);
 		int BlockY          = (int)      tolua_tonumber   (tolua_S, 3, 0);
 		int BlockZ          = (int)      tolua_tonumber   (tolua_S, 4, 0);
@@ -1030,11 +1030,11 @@ static int tolua_cWorld_SetSignLines(lua_State * tolua_S)
 		const AString Line2 =            tolua_tocppstring(tolua_S, 6, 0);
 		const AString Line3 =            tolua_tocppstring(tolua_S, 7, 0);
 		const AString Line4 =            tolua_tocppstring(tolua_S, 8, 0);
-		cPlayer * Player    = (cPlayer *)tolua_tousertype (tolua_S, 9, NULL);
+		cPlayer * Player    = (cPlayer *)tolua_tousertype (tolua_S, 9, nullptr);
 		#ifndef TOLUA_RELEASE
-		if (self == NULL)
+		if (self == nullptr)
 		{
-			tolua_error(tolua_S, "invalid 'self' in function 'SetSignLines' / 'UpdateSign'", NULL);
+			tolua_error(tolua_S, "invalid 'self' in function 'SetSignLines' / 'UpdateSign'", nullptr);
 		}
 		#endif
 		{
@@ -1071,13 +1071,13 @@ static int tolua_cWorld_TryGetHeight(lua_State * tolua_S)
 	else
 	#endif
 	{
-		cWorld * self       = (cWorld *) tolua_tousertype (tolua_S, 1, NULL);
+		cWorld * self       = (cWorld *) tolua_tousertype (tolua_S, 1, nullptr);
 		int BlockX          = (int)      tolua_tonumber   (tolua_S, 2, 0);
 		int BlockZ          = (int)      tolua_tonumber   (tolua_S, 3, 0);
 		#ifndef TOLUA_RELEASE
-		if (self == NULL)
+		if (self == nullptr)
 		{
-			tolua_error(tolua_S, "Invalid 'self' in function 'TryGetHeight'", NULL);
+			tolua_error(tolua_S, "Invalid 'self' in function 'TryGetHeight'", nullptr);
 		}
 		#endif
 		{
@@ -1136,15 +1136,15 @@ static int tolua_cWorld_QueueTask(lua_State * tolua_S)
 	
 	// Retrieve the cPlugin from the LuaState:
 	cPluginLua * Plugin = GetLuaPlugin(tolua_S);
-	if (Plugin == NULL)
+	if (Plugin == nullptr)
 	{
 		// An error message has been already printed in GetLuaPlugin()
 		return 0;
 	}
 
 	// Retrieve the args:
-	cWorld * self = (cWorld *)tolua_tousertype(tolua_S, 1, NULL);
-	if (self == NULL)
+	cWorld * self = (cWorld *)tolua_tousertype(tolua_S, 1, nullptr);
+	if (self == nullptr)
 	{
 		return lua_do_error(tolua_S, "Error in function call '#funcname#': Not called on an object instance");
 	}
@@ -1200,7 +1200,7 @@ static int tolua_cWorld_ScheduleTask(lua_State * tolua_S)
 	
 	// Retrieve the cPlugin from the LuaState:
 	cPluginLua * Plugin = GetLuaPlugin(tolua_S);
-	if (Plugin == NULL)
+	if (Plugin == nullptr)
 	{
 		// An error message has been already printed in GetLuaPlugin()
 		return 0;
@@ -1216,8 +1216,8 @@ static int tolua_cWorld_ScheduleTask(lua_State * tolua_S)
 	{
 		return 0;
 	}
-	cWorld * World = (cWorld *)tolua_tousertype(tolua_S, 1, NULL);
-	if (World == NULL)
+	cWorld * World = (cWorld *)tolua_tousertype(tolua_S, 1, nullptr);
+	if (World == nullptr)
 	{
 		return lua_do_error(tolua_S, "Error in function call '#funcname#': Not called on an object instance");
 	}
@@ -1241,7 +1241,7 @@ static int tolua_cWorld_ScheduleTask(lua_State * tolua_S)
 
 static int tolua_cPluginManager_GetAllPlugins(lua_State * tolua_S)
 {
-	cPluginManager * self = (cPluginManager *)tolua_tousertype(tolua_S, 1, NULL);
+	cPluginManager * self = (cPluginManager *)tolua_tousertype(tolua_S, 1, nullptr);
 
 	const cPluginManager::PluginMap & AllPlugins = self->GetAllPlugins();
 
@@ -1252,7 +1252,7 @@ static int tolua_cPluginManager_GetAllPlugins(lua_State * tolua_S)
 	{
 		const cPlugin* Plugin = iter->second;
 		tolua_pushstring(tolua_S, iter->first.c_str());
-		if (Plugin != NULL)
+		if (Plugin != nullptr)
 		{
 			tolua_pushusertype(tolua_S, (void *)Plugin, "const cPlugin");
 		}
@@ -1274,7 +1274,7 @@ static int tolua_cPluginManager_GetAllPlugins(lua_State * tolua_S)
 static int tolua_cPluginManager_GetCurrentPlugin(lua_State * S)
 {
 	cPluginLua * Plugin = GetLuaPlugin(S);
-	if (Plugin == NULL)
+	if (Plugin == nullptr)
 	{
 		// An error message has already been printed in GetLuaPlugin()
 		return 0;
@@ -1305,7 +1305,7 @@ static int tolua_cPluginManager_AddHook_FnRef(cPluginManager * a_PluginManager,
 	
 	// Retrieve the cPlugin from the LuaState:
 	cPluginLua * Plugin = GetLuaPlugin(S);
-	if (Plugin == NULL)
+	if (Plugin == nullptr)
 	{
 		// An error message has been already printed in GetLuaPlugin()
 		return 0;
@@ -1344,8 +1344,8 @@ static int tolua_cPluginManager_AddHook_DefFn(cPluginManager * a_PluginManager,
 	// The arg types have already been checked
 	
 	// Retrieve and check the cPlugin parameter
-	cPluginLua * Plugin = (cPluginLua *)tolua_tousertype(S, a_ParamIdx, NULL);
-	if (Plugin == NULL)
+	cPluginLua * Plugin = (cPluginLua *)tolua_tousertype(S, a_ParamIdx, nullptr);
+	if (Plugin == nullptr)
 	{
 		LOGWARNING("cPluginManager.AddHook(): Invalid Plugin parameter, expected a valid cPlugin object. Hook not added");
 		S.LogStackTrace();
@@ -1370,7 +1370,7 @@ static int tolua_cPluginManager_AddHook_DefFn(cPluginManager * a_PluginManager,
 	
 	// Get the standard name for the callback function:
 	const char * FnName = cPluginLua::GetHookFnName(HookType);
-	if (FnName == NULL)
+	if (FnName == nullptr)
 	{
 		LOGWARNING("cPluginManager.AddHook(): Unknown hook type (%d). Hook not added.", HookType);
 		S.LogStackTrace();
@@ -1417,8 +1417,8 @@ static int tolua_cPluginManager_AddHook(lua_State * tolua_S)
 	if (tolua_isusertype(S, 1, "cPluginManager", 0, &err))
 	{
 		// Style 2 or 3, retrieve the PlgMgr instance
-		PlgMgr = (cPluginManager *)tolua_tousertype(S, 1, NULL);
-		if (PlgMgr == NULL)
+		PlgMgr = (cPluginManager *)tolua_tousertype(S, 1, nullptr);
+		if (PlgMgr == nullptr)
 		{
 			LOGWARNING("Malformed plugin, use cPluginManager.AddHook(HOOK_TYPE, CallbackFunction). Fixing the call for you.");
 			S.LogStackTrace();
@@ -1465,8 +1465,8 @@ static int tolua_cPluginManager_ForEachCommand(lua_State * tolua_S)
 		return 0;
 	}
 
-	cPluginManager * self = (cPluginManager *)tolua_tousertype(tolua_S, 1, NULL);
-	if (self == NULL)
+	cPluginManager * self = (cPluginManager *)tolua_tousertype(tolua_S, 1, nullptr);
+	if (self == nullptr)
 	{
 		LOGWARN("Error in function call 'ForEachCommand': Not called on an object instance");
 		return 0;
@@ -1542,8 +1542,8 @@ static int tolua_cPluginManager_ForEachConsoleCommand(lua_State * tolua_S)
 		return 0;
 	}
 
-	cPluginManager * self = (cPluginManager *)tolua_tousertype(tolua_S, 1, NULL);
-	if (self == NULL)
+	cPluginManager * self = (cPluginManager *)tolua_tousertype(tolua_S, 1, nullptr);
+	if (self == nullptr)
 	{
 		LOGWARN("Error in function call 'ForEachConsoleCommand': Not called on an object instance");
 		return 0;
@@ -1617,7 +1617,7 @@ static int tolua_cPluginManager_BindCommand(lua_State * L)
 		cPluginManager.BindCommand(Command, Permission, Function, HelpString)  -- without the "self" param
 	*/
 	cPluginLua * Plugin = GetLuaPlugin(L);
-	if (Plugin == NULL)
+	if (Plugin == nullptr)
 	{
 		return 0;
 	}
@@ -1687,7 +1687,7 @@ static int tolua_cPluginManager_BindConsoleCommand(lua_State * L)
 	
 	// Get the plugin identification out of LuaState:
 	cPluginLua * Plugin = GetLuaPlugin(L);
-	if (Plugin == NULL)
+	if (Plugin == nullptr)
 	{
 		return 0;
 	}
@@ -1775,7 +1775,7 @@ static int tolua_cPluginManager_CallPlugin(lua_State * tolua_S)
 	
 	// If requesting calling the current plugin, refuse:
 	cPluginLua * ThisPlugin = GetLuaPlugin(L);
-	if (ThisPlugin == NULL)
+	if (ThisPlugin == nullptr)
 	{
 		return 0;
 	}
@@ -1843,14 +1843,14 @@ static int tolua_cWorld_ChunkStay(lua_State * tolua_S)
 	}
 	
 	cPluginLua * Plugin = GetLuaPlugin(tolua_S);
-	if (Plugin == NULL)
+	if (Plugin == nullptr)
 	{
 		return 0;
 	}
 	
 	// Read the params:
-	cWorld * World = (cWorld *)tolua_tousertype(tolua_S, 1, NULL);
-	if (World == NULL)
+	cWorld * World = (cWorld *)tolua_tousertype(tolua_S, 1, nullptr);
+	if (World == nullptr)
 	{
 		LOGWARNING("World:ChunkStay(): invalid world parameter");
 		L.LogStackTrace();
@@ -1862,7 +1862,7 @@ static int tolua_cWorld_ChunkStay(lua_State * tolua_S)
 	if (!ChunkStay->AddChunks(2))
 	{
 		delete ChunkStay;
-		ChunkStay = NULL;
+		ChunkStay = nullptr;
 		return 0;
 	}
 
@@ -1889,8 +1889,8 @@ static int tolua_cPlayer_GetPermissions(lua_State * tolua_S)
 	}
 
 	// Get the params:
-	cPlayer * self = (cPlayer *)tolua_tousertype(tolua_S, 1, NULL);
-	if (self == NULL)
+	cPlayer * self = (cPlayer *)tolua_tousertype(tolua_S, 1, nullptr);
+	if (self == nullptr)
 	{
 		LOGWARNING("%s: invalid self (%p)", __FUNCTION__, self);
 		return 0;
@@ -1911,15 +1911,15 @@ static int tolua_cPlayer_OpenWindow(lua_State * tolua_S)
 
 	// Retrieve the plugin instance from the Lua state
 	cPluginLua * Plugin = GetLuaPlugin(tolua_S);
-	if (Plugin == NULL)
+	if (Plugin == nullptr)
 	{
 		return 0;
 	}
 
 	// Get the parameters:
-	cPlayer * self = (cPlayer *)tolua_tousertype(tolua_S, 1, NULL);
-	cWindow * wnd  = (cWindow *)tolua_tousertype(tolua_S, 2, NULL);
-	if ((self == NULL) || (wnd == NULL))
+	cPlayer * self = (cPlayer *)tolua_tousertype(tolua_S, 1, nullptr);
+	cWindow * wnd  = (cWindow *)tolua_tousertype(tolua_S, 2, nullptr);
+	if ((self == nullptr) || (wnd == nullptr))
 	{
 		LOGWARNING("%s: invalid self (%p) or wnd (%p)", __FUNCTION__, self, wnd);
 		return 0;
@@ -1992,15 +1992,15 @@ static int tolua_SetObjectCallback(lua_State * tolua_S)
 
 	// Retrieve the plugin instance from the Lua state
 	cPluginLua * Plugin = GetLuaPlugin(tolua_S);
-	if (Plugin == NULL)
+	if (Plugin == nullptr)
 	{
 		// Warning message has already been printed by GetLuaPlugin(), bail out silently
 		return 0;
 	}
 
 	// Get the parameters - self and the function reference:
-	OBJTYPE * self = (OBJTYPE *)tolua_tousertype(tolua_S, 1, NULL);
-	if (self == NULL)
+	OBJTYPE * self = (OBJTYPE *)tolua_tousertype(tolua_S, 1, nullptr);
+	if (self == nullptr)
 	{
 		LOGWARNING("%s: invalid self (%p)", __FUNCTION__, self);
 		return 0;
@@ -2023,7 +2023,7 @@ static int tolua_SetObjectCallback(lua_State * tolua_S)
 
 static int tolua_cPluginLua_AddWebTab(lua_State * tolua_S)
 {
-	cPluginLua * self = (cPluginLua *)tolua_tousertype(tolua_S, 1, NULL);
+	cPluginLua * self = (cPluginLua *)tolua_tousertype(tolua_S, 1, nullptr);
 
 	tolua_Error tolua_err;
 	tolua_err.array = 0;
@@ -2067,7 +2067,7 @@ static int tolua_cPluginLua_AddWebTab(lua_State * tolua_S)
 
 static int tolua_cPluginLua_AddTab(lua_State* tolua_S)
 {
-	cPluginLua * self = (cPluginLua *) tolua_tousertype(tolua_S, 1, NULL);
+	cPluginLua * self = (cPluginLua *) tolua_tousertype(tolua_S, 1, nullptr);
 	LOGWARN("WARNING: Using deprecated function AddTab()! Use AddWebTab() instead. (plugin \"%s\" in folder \"%s\")",
 		self->GetName().c_str(), self->GetDirectory().c_str()
 	);
@@ -2087,7 +2087,7 @@ static int tolua_cPlugin_Call(lua_State * tolua_S)
 	L.LogStackTrace();
 	
 	// Retrieve the params: plugin and the function name to call
-	cPluginLua * TargetPlugin = (cPluginLua *) tolua_tousertype(tolua_S, 1, NULL);
+	cPluginLua * TargetPlugin = (cPluginLua *) tolua_tousertype(tolua_S, 1, nullptr);
 	AString FunctionName = tolua_tostring(tolua_S, 2, "");
 	
 	// Call the function:
@@ -2142,7 +2142,7 @@ static int tolua_push_StringStringMap(lua_State* tolua_S, std::map< std::string,
 
 static int tolua_get_HTTPRequest_Params(lua_State* tolua_S)
 {
-	HTTPRequest* self = (HTTPRequest*)  tolua_tousertype(tolua_S, 1, NULL);
+	HTTPRequest* self = (HTTPRequest*)  tolua_tousertype(tolua_S, 1, nullptr);
 	return tolua_push_StringStringMap(tolua_S, self->Params);
 }
 
@@ -2152,7 +2152,7 @@ static int tolua_get_HTTPRequest_Params(lua_State* tolua_S)
 
 static int tolua_get_HTTPRequest_PostParams(lua_State* tolua_S)
 {
-	HTTPRequest* self = (HTTPRequest*)  tolua_tousertype(tolua_S, 1, NULL);
+	HTTPRequest* self = (HTTPRequest*)  tolua_tousertype(tolua_S, 1, nullptr);
 	return tolua_push_StringStringMap(tolua_S, self->PostParams);
 }
 
@@ -2162,7 +2162,7 @@ static int tolua_get_HTTPRequest_PostParams(lua_State* tolua_S)
 
 static int tolua_get_HTTPRequest_FormData(lua_State* tolua_S)
 {
-	HTTPRequest* self = (HTTPRequest*)  tolua_tousertype(tolua_S, 1, NULL);
+	HTTPRequest* self = (HTTPRequest*)  tolua_tousertype(tolua_S, 1, nullptr);
 	std::map< std::string, HTTPFormData >& FormData = self->FormData;
 
 	lua_newtable(tolua_S);
@@ -2185,7 +2185,7 @@ static int tolua_get_HTTPRequest_FormData(lua_State* tolua_S)
 
 static int tolua_cWebAdmin_GetPlugins(lua_State * tolua_S)
 {
-	cWebAdmin * self = (cWebAdmin *)tolua_tousertype(tolua_S, 1, NULL);
+	cWebAdmin * self = (cWebAdmin *)tolua_tousertype(tolua_S, 1, nullptr);
 
 	const cWebAdmin::PluginList & AllPlugins = self->GetPlugins();
 
@@ -2266,7 +2266,7 @@ static int tolua_AllToLua_cWebAdmin_GetURLEncodedString(lua_State * tolua_S)
 
 static int tolua_cWebPlugin_GetTabNames(lua_State * tolua_S)
 {
-	cWebPlugin* self = (cWebPlugin*)  tolua_tousertype(tolua_S, 1, NULL);
+	cWebPlugin* self = (cWebPlugin*)  tolua_tousertype(tolua_S, 1, nullptr);
 
 	const cWebPlugin::TabNameList & TabNames = self->GetTabNames();
 
@@ -2302,8 +2302,8 @@ static int tolua_cClientHandle_SendPluginMessage(lua_State * L)
 	{
 		return 0;
 	}
-	cClientHandle * Client = (cClientHandle *)tolua_tousertype(L, 1, NULL);
-	if (Client == NULL)
+	cClientHandle * Client = (cClientHandle *)tolua_tousertype(L, 1, nullptr);
+	if (Client == nullptr)
 	{
 		LOGWARNING("ClientHandle is nil in cClientHandle:SendPluginMessage()");
 		S.LogStackTrace();
@@ -2548,11 +2548,11 @@ static int Lua_ItemGrid_GetSlotCoords(lua_State * L)
 	}
 
 	{
-		const cItemGrid * self = (const cItemGrid *)tolua_tousertype(L, 1, NULL);
+		const cItemGrid * self = (const cItemGrid *)tolua_tousertype(L, 1, nullptr);
 		int SlotNum = (int)tolua_tonumber(L, 2, 0);
-		if (self == NULL)
+		if (self == nullptr)
 		{
-			tolua_error(L, "invalid 'self' in function 'cItemGrid:GetSlotCoords'", NULL);
+			tolua_error(L, "invalid 'self' in function 'cItemGrid:GetSlotCoords'", nullptr);
 			return 0;
 		}
 		int X, Y;
@@ -2689,7 +2689,7 @@ static int tolua_cLineBlockTracer_Trace(lua_State * tolua_S)
 	}
 
 	// Trace:
-	cWorld * World = (cWorld *)tolua_tousertype(L, idx, NULL);
+	cWorld * World = (cWorld *)tolua_tousertype(L, idx, nullptr);
 	cLuaBlockTracerCallbacks Callbacks(L, idx + 1);
 	double StartX = tolua_tonumber(L, idx + 2, 0);
 	double StartY = tolua_tonumber(L, idx + 3, 0);
@@ -2719,8 +2719,8 @@ static int tolua_cRoot_GetFurnaceRecipe(lua_State * tolua_S)
 	}
 	
 	// Check the input param:
-	cItem * Input = (cItem *)tolua_tousertype(L, 2, NULL);
-	if (Input == NULL)
+	cItem * Input = (cItem *)tolua_tousertype(L, 2, nullptr);
+	if (Input == nullptr)
 	{
 		LOGWARNING("cRoot:GetFurnaceRecipe: the Input parameter is nil or missing.");
 		return 0;
@@ -2729,7 +2729,7 @@ static int tolua_cRoot_GetFurnaceRecipe(lua_State * tolua_S)
 	// Get the recipe for the input
 	cFurnaceRecipe * FR = cRoot::Get()->GetFurnaceRecipe();
 	const cFurnaceRecipe::cRecipe * Recipe = FR->GetRecipeFrom(*Input);
-	if (Recipe == NULL)
+	if (Recipe == nullptr)
 	{
 		// There is no such furnace recipe for this input, return no value
 		return 0;
@@ -2760,10 +2760,10 @@ static int tolua_cHopperEntity_GetOutputBlockPos(lua_State * tolua_S)
 	{
 		return 0;
 	}
-	cHopperEntity * self = (cHopperEntity *)tolua_tousertype(tolua_S, 1, NULL);
-	if (self == NULL)
+	cHopperEntity * self = (cHopperEntity *)tolua_tousertype(tolua_S, 1, nullptr);
+	if (self == nullptr)
 	{
-		tolua_error(tolua_S, "invalid 'self' in function 'cHopperEntity::GetOutputBlockPos()'", NULL);
+		tolua_error(tolua_S, "invalid 'self' in function 'cHopperEntity::GetOutputBlockPos()'", nullptr);
 		return 0;
 	}
 
@@ -2800,10 +2800,10 @@ static int tolua_cBlockArea_GetBlockTypeMeta(lua_State * tolua_S)
 		return 0;
 	}
 	
-	cBlockArea * self = (cBlockArea *)tolua_tousertype(tolua_S, 1, NULL);
-	if (self == NULL)
+	cBlockArea * self = (cBlockArea *)tolua_tousertype(tolua_S, 1, nullptr);
+	if (self == nullptr)
 	{
-		tolua_error(tolua_S, "invalid 'self' in function 'cBlockArea:GetRelBlockTypeMeta'", NULL);
+		tolua_error(tolua_S, "invalid 'self' in function 'cBlockArea:GetRelBlockTypeMeta'", nullptr);
 		return 0;
 	}
 	int BlockX = (int)tolua_tonumber(tolua_S, 2, 0);
@@ -2834,10 +2834,10 @@ static int tolua_cBlockArea_GetOrigin(lua_State * tolua_S)
 		return 0;
 	}
 	
-	cBlockArea * self = (cBlockArea *)tolua_tousertype(tolua_S, 1, NULL);
-	if (self == NULL)
+	cBlockArea * self = (cBlockArea *)tolua_tousertype(tolua_S, 1, nullptr);
+	if (self == nullptr)
 	{
-		tolua_error(tolua_S, "invalid 'self' in function 'cBlockArea:GetOrigin'", NULL);
+		tolua_error(tolua_S, "invalid 'self' in function 'cBlockArea:GetOrigin'", nullptr);
 		return 0;
 	}
 	
@@ -2866,10 +2866,10 @@ static int tolua_cBlockArea_GetRelBlockTypeMeta(lua_State * tolua_S)
 		return 0;
 	}
 	
-	cBlockArea * self = (cBlockArea *)tolua_tousertype(tolua_S, 1, NULL);
-	if (self == NULL)
+	cBlockArea * self = (cBlockArea *)tolua_tousertype(tolua_S, 1, nullptr);
+	if (self == nullptr)
 	{
-		tolua_error(tolua_S, "invalid 'self' in function 'cBlockArea:GetRelBlockTypeMeta'", NULL);
+		tolua_error(tolua_S, "invalid 'self' in function 'cBlockArea:GetRelBlockTypeMeta'", nullptr);
 		return 0;
 	}
 	int BlockX = (int)tolua_tonumber(tolua_S, 2, 0);
@@ -2900,10 +2900,10 @@ static int tolua_cBlockArea_GetSize(lua_State * tolua_S)
 		return 0;
 	}
 	
-	cBlockArea * self = (cBlockArea *)tolua_tousertype(tolua_S, 1, NULL);
-	if (self == NULL)
+	cBlockArea * self = (cBlockArea *)tolua_tousertype(tolua_S, 1, nullptr);
+	if (self == nullptr)
 	{
-		tolua_error(tolua_S, "invalid 'self' in function 'cBlockArea:GetSize'", NULL);
+		tolua_error(tolua_S, "invalid 'self' in function 'cBlockArea:GetSize'", nullptr);
 		return 0;
 	}
 	
@@ -2931,10 +2931,10 @@ static int tolua_cBlockArea_GetCoordRange(lua_State * tolua_S)
 		return 0;
 	}
 	
-	cBlockArea * self = (cBlockArea *)tolua_tousertype(tolua_S, 1, NULL);
-	if (self == NULL)
+	cBlockArea * self = (cBlockArea *)tolua_tousertype(tolua_S, 1, nullptr);
+	if (self == nullptr)
 	{
-		tolua_error(tolua_S, "invalid 'self' in function 'cBlockArea:GetSize'", NULL);
+		tolua_error(tolua_S, "invalid 'self' in function 'cBlockArea:GetSize'", nullptr);
 		return 0;
 	}
 	
@@ -2962,10 +2962,10 @@ static int tolua_cBlockArea_LoadFromSchematicFile(lua_State * tolua_S)
 	{
 		return 0;
 	}
-	cBlockArea * self = (cBlockArea *)tolua_tousertype(tolua_S, 1, NULL);
-	if (self == NULL)
+	cBlockArea * self = (cBlockArea *)tolua_tousertype(tolua_S, 1, nullptr);
+	if (self == nullptr)
 	{
-		tolua_error(tolua_S, "invalid 'self' in function 'cBlockArea::LoadFromSchematicFile'", NULL);
+		tolua_error(tolua_S, "invalid 'self' in function 'cBlockArea::LoadFromSchematicFile'", nullptr);
 		return 0;
 	}
 
@@ -2992,10 +2992,10 @@ static int tolua_cBlockArea_LoadFromSchematicString(lua_State * tolua_S)
 	{
 		return 0;
 	}
-	cBlockArea * self = (cBlockArea *)tolua_tousertype(tolua_S, 1, NULL);
-	if (self == NULL)
+	cBlockArea * self = (cBlockArea *)tolua_tousertype(tolua_S, 1, nullptr);
+	if (self == nullptr)
 	{
-		tolua_error(tolua_S, "invalid 'self' in function 'cBlockArea::LoadFromSchematicFile'", NULL);
+		tolua_error(tolua_S, "invalid 'self' in function 'cBlockArea::LoadFromSchematicFile'", nullptr);
 		return 0;
 	}
 
@@ -3023,10 +3023,10 @@ static int tolua_cBlockArea_SaveToSchematicFile(lua_State * tolua_S)
 	{
 		return 0;
 	}
-	cBlockArea * self = (cBlockArea *)tolua_tousertype(tolua_S, 1, NULL);
-	if (self == NULL)
+	cBlockArea * self = (cBlockArea *)tolua_tousertype(tolua_S, 1, nullptr);
+	if (self == nullptr)
 	{
-		tolua_error(tolua_S, "invalid 'self' in function 'cBlockArea::SaveToSchematicFile'", NULL);
+		tolua_error(tolua_S, "invalid 'self' in function 'cBlockArea::SaveToSchematicFile'", nullptr);
 		return 0;
 	}
 	AString Filename = tolua_tostring(tolua_S, 2, 0);
@@ -3051,10 +3051,10 @@ static int tolua_cBlockArea_SaveToSchematicString(lua_State * tolua_S)
 	{
 		return 0;
 	}
-	cBlockArea * self = (cBlockArea *)tolua_tousertype(tolua_S, 1, NULL);
-	if (self == NULL)
+	cBlockArea * self = (cBlockArea *)tolua_tousertype(tolua_S, 1, nullptr);
+	if (self == nullptr)
 	{
-		tolua_error(tolua_S, "invalid 'self' in function 'cBlockArea::SaveToSchematicFile'", NULL);
+		tolua_error(tolua_S, "invalid 'self' in function 'cBlockArea::SaveToSchematicFile'", nullptr);
 		return 0;
 	}
 	
@@ -3085,10 +3085,10 @@ static int tolua_cCompositeChat_AddRunCommandPart(lua_State * tolua_S)
 	{
 		return 0;
 	}
-	cCompositeChat * self = (cCompositeChat *)tolua_tousertype(tolua_S, 1, NULL);
-	if (self == NULL)
+	cCompositeChat * self = (cCompositeChat *)tolua_tousertype(tolua_S, 1, nullptr);
+	if (self == nullptr)
 	{
-		tolua_error(tolua_S, "invalid 'self' in function 'cCompositeChat:AddRunCommandPart'", NULL);
+		tolua_error(tolua_S, "invalid 'self' in function 'cCompositeChat:AddRunCommandPart'", nullptr);
 		return 0;
 	}
 	
@@ -3122,10 +3122,10 @@ static int tolua_cCompositeChat_AddSuggestCommandPart(lua_State * tolua_S)
 	{
 		return 0;
 	}
-	cCompositeChat * self = (cCompositeChat *)tolua_tousertype(tolua_S, 1, NULL);
-	if (self == NULL)
+	cCompositeChat * self = (cCompositeChat *)tolua_tousertype(tolua_S, 1, nullptr);
+	if (self == nullptr)
 	{
-		tolua_error(tolua_S, "invalid 'self' in function 'cCompositeChat:AddSuggestCommandPart'", NULL);
+		tolua_error(tolua_S, "invalid 'self' in function 'cCompositeChat:AddSuggestCommandPart'", nullptr);
 		return 0;
 	}
 	
@@ -3159,10 +3159,10 @@ static int tolua_cCompositeChat_AddTextPart(lua_State * tolua_S)
 	{
 		return 0;
 	}
-	cCompositeChat * self = (cCompositeChat *)tolua_tousertype(tolua_S, 1, NULL);
-	if (self == NULL)
+	cCompositeChat * self = (cCompositeChat *)tolua_tousertype(tolua_S, 1, nullptr);
+	if (self == nullptr)
 	{
-		tolua_error(tolua_S, "invalid 'self' in function 'cCompositeChat:AddTextPart'", NULL);
+		tolua_error(tolua_S, "invalid 'self' in function 'cCompositeChat:AddTextPart'", nullptr);
 		return 0;
 	}
 	
@@ -3195,10 +3195,10 @@ static int tolua_cCompositeChat_AddUrlPart(lua_State * tolua_S)
 	{
 		return 0;
 	}
-	cCompositeChat * self = (cCompositeChat *)tolua_tousertype(tolua_S, 1, NULL);
-	if (self == NULL)
+	cCompositeChat * self = (cCompositeChat *)tolua_tousertype(tolua_S, 1, nullptr);
+	if (self == nullptr)
 	{
-		tolua_error(tolua_S, "invalid 'self' in function 'cCompositeChat:AddUrlPart'", NULL);
+		tolua_error(tolua_S, "invalid 'self' in function 'cCompositeChat:AddUrlPart'", nullptr);
 		return 0;
 	}
 	
@@ -3232,10 +3232,10 @@ static int tolua_cCompositeChat_ParseText(lua_State * tolua_S)
 	{
 		return 0;
 	}
-	cCompositeChat * self = (cCompositeChat *)tolua_tousertype(tolua_S, 1, NULL);
-	if (self == NULL)
+	cCompositeChat * self = (cCompositeChat *)tolua_tousertype(tolua_S, 1, nullptr);
+	if (self == nullptr)
 	{
-		tolua_error(tolua_S, "invalid 'self' in function 'cCompositeChat:ParseText'", NULL);
+		tolua_error(tolua_S, "invalid 'self' in function 'cCompositeChat:ParseText'", nullptr);
 		return 0;
 	}
 	
@@ -3267,10 +3267,10 @@ static int tolua_cCompositeChat_SetMessageType(lua_State * tolua_S)
 	{
 		return 0;
 	}
-	cCompositeChat * self = (cCompositeChat *)tolua_tousertype(tolua_S, 1, NULL);
-	if (self == NULL)
+	cCompositeChat * self = (cCompositeChat *)tolua_tousertype(tolua_S, 1, nullptr);
+	if (self == nullptr)
 	{
-		tolua_error(tolua_S, "invalid 'self' in function 'cCompositeChat:SetMessageType'", NULL);
+		tolua_error(tolua_S, "invalid 'self' in function 'cCompositeChat:SetMessageType'", nullptr);
 		return 0;
 	}
 	
@@ -3299,10 +3299,10 @@ static int tolua_cCompositeChat_UnderlineUrls(lua_State * tolua_S)
 	{
 		return 0;
 	}
-	cCompositeChat * self = (cCompositeChat *)tolua_tousertype(tolua_S, 1, NULL);
-	if (self == NULL)
+	cCompositeChat * self = (cCompositeChat *)tolua_tousertype(tolua_S, 1, nullptr);
+	if (self == nullptr)
 	{
-		tolua_error(tolua_S, "invalid 'self' in function 'cCompositeChat:UnderlineUrls'", NULL);
+		tolua_error(tolua_S, "invalid 'self' in function 'cCompositeChat:UnderlineUrls'", nullptr);
 		return 0;
 	}
 	
@@ -3320,7 +3320,7 @@ static int tolua_cCompositeChat_UnderlineUrls(lua_State * tolua_S)
 
 void ManualBindings::Bind(lua_State * tolua_S)
 {
-	tolua_beginmodule(tolua_S, NULL);
+	tolua_beginmodule(tolua_S, nullptr);
 		tolua_function(tolua_S, "Clamp",              tolua_Clamp);
 		tolua_function(tolua_S, "StringSplit",        tolua_StringSplit);
 		tolua_function(tolua_S, "StringSplitAndTrim", tolua_StringSplitAndTrim);
@@ -3447,7 +3447,7 @@ void ManualBindings::Bind(lua_State * tolua_S)
 			tolua_function(tolua_S, "AddWebTab", tolua_cPluginLua_AddWebTab);
 		tolua_endmodule(tolua_S);
 
-		tolua_cclass(tolua_S, "HTTPRequest", "HTTPRequest", "", NULL);
+		tolua_cclass(tolua_S, "HTTPRequest", "HTTPRequest", "", nullptr);
 		tolua_beginmodule(tolua_S, "HTTPRequest");
 			// tolua_variable(tolua_S, "Method", tolua_get_HTTPRequest_Method, tolua_set_HTTPRequest_Method);
 			// tolua_variable(tolua_S, "Path", tolua_get_HTTPRequest_Path, tolua_set_HTTPRequest_Path);
diff --git a/src/Bindings/ManualBindings_RankManager.cpp b/src/Bindings/ManualBindings_RankManager.cpp
index 66174bf86..fa1b88b6a 100644
--- a/src/Bindings/ManualBindings_RankManager.cpp
+++ b/src/Bindings/ManualBindings_RankManager.cpp
@@ -1044,7 +1044,7 @@ void ManualBindings::BindRankManager(lua_State * tolua_S)
 {
 	// Create the cRankManager class in the API:
 	tolua_usertype(tolua_S, "cRankManager");
-	tolua_cclass(tolua_S, "cRankManager", "cRankManager", "", NULL);
+	tolua_cclass(tolua_S, "cRankManager", "cRankManager", "", nullptr);
 	
 	// Fill in the functions (alpha-sorted):
 	tolua_beginmodule(tolua_S, "cRankManager");
diff --git a/src/Bindings/PluginLua.cpp b/src/Bindings/PluginLua.cpp
index eec31e8a6..391d8bcbe 100644
--- a/src/Bindings/PluginLua.cpp
+++ b/src/Bindings/PluginLua.cpp
@@ -1487,7 +1487,7 @@ void cPluginLua::ClearCommands(void)
 	cCSLock Lock(m_CriticalSection);
 
 	// Unreference the bound functions so that Lua can GC them
-	if (m_LuaState != NULL)
+	if (m_LuaState != nullptr)
 	{
 		for (CommandMap::iterator itr = m_Commands.begin(), end = m_Commands.end(); itr != end; ++itr)
 		{
@@ -1506,7 +1506,7 @@ void cPluginLua::ClearConsoleCommands(void)
 	cCSLock Lock(m_CriticalSection);
 
 	// Unreference the bound functions so that Lua can GC them
-	if (m_LuaState != NULL)
+	if (m_LuaState != nullptr)
 	{
 		for (CommandMap::iterator itr = m_ConsoleCommands.begin(), end = m_ConsoleCommands.end(); itr != end; ++itr)
 		{
@@ -1523,7 +1523,7 @@ void cPluginLua::ClearConsoleCommands(void)
 bool cPluginLua::CanAddOldStyleHook(int a_HookType)
 {
 	const char * FnName = GetHookFnName(a_HookType);
-	if (FnName == NULL)
+	if (FnName == nullptr)
 	{
 		// Unknown hook ID
 		LOGWARNING("Plugin %s wants to add an unknown hook ID (%d). The plugin need not work properly.",
@@ -1614,7 +1614,7 @@ const char * cPluginLua::GetHookFnName(int a_HookType)
 	}  // switch (a_Hook)
 	LOGWARNING("Requested name of an unknown hook type function: %d (max is %d)", a_HookType, cPluginManager::HOOK_MAX);
 	ASSERT(!"Unknown hook requested!");
-	return NULL;
+	return nullptr;
 }
 
 
@@ -1627,12 +1627,12 @@ bool cPluginLua::AddHookRef(int a_HookType, int a_FnRefIdx)
 	
 	// Check if the function reference is valid:
 	cLuaState::cRef * Ref = new cLuaState::cRef(m_LuaState, a_FnRefIdx);
-	if ((Ref == NULL) || !Ref->IsValid())
+	if ((Ref == nullptr) || !Ref->IsValid())
 	{
 		LOGWARNING("Plugin %s tried to add a hook %d with bad handler function.", GetName().c_str(), a_HookType);
 		m_LuaState.LogStackTrace();
 		delete Ref;
-		Ref = NULL;
+		Ref = nullptr;
 		return false;
 	}
 	
@@ -1700,7 +1700,7 @@ AString cPluginLua::HandleWebRequest(const HTTPRequest * a_Request)
 		}
 	}
 
-	if (Tab != NULL)
+	if (Tab != nullptr)
 	{
 		AString Contents = Printf("WARNING: WebPlugin tab '%s' did not return a string!", Tab->Title.c_str());
 		if (!m_LuaState.Call(Tab->UserData, a_Request, cLuaState::Return, Contents))
diff --git a/src/Bindings/PluginManager.cpp b/src/Bindings/PluginManager.cpp
index 479e71951..e549aefa3 100644
--- a/src/Bindings/PluginManager.cpp
+++ b/src/Bindings/PluginManager.cpp
@@ -66,7 +66,7 @@ void cPluginManager::FindPlugins(void)
 	// First get a clean list of only the currently running plugins, we don't want to mess those up
 	for (PluginMap::iterator itr = m_Plugins.begin(); itr != m_Plugins.end();)
 	{
-		if (itr->second == NULL)
+		if (itr->second == nullptr)
 		{
 			PluginMap::iterator thiz = itr;
 			++thiz;
@@ -89,7 +89,7 @@ void cPluginManager::FindPlugins(void)
 		// Add plugin name/directory to the list
 		if (m_Plugins.find(*itr) == m_Plugins.end())
 		{
-			m_Plugins[*itr] = NULL;
+			m_Plugins[*itr] = nullptr;
 		}
 	}
 }
@@ -151,7 +151,7 @@ void cPluginManager::ReloadPluginsNow(cIniFile & a_SettingsIni)
 	// Remove invalid plugins from the PluginMap.
 	for (PluginMap::iterator itr = m_Plugins.begin(); itr != m_Plugins.end();)
 	{
-		if (itr->second == NULL)
+		if (itr->second == nullptr)
 		{
 			PluginMap::iterator thiz = itr;
 			++thiz;
@@ -1445,7 +1445,7 @@ cPluginManager::CommandResult cPluginManager::HandleCommand(cPlayer & a_Player,
 		return crNoPermission;
 	}
 
-	ASSERT(cmd->second.m_Plugin != NULL);
+	ASSERT(cmd->second.m_Plugin != nullptr);
 
 	if (!cmd->second.m_Plugin->HandleCommand(Split, a_Player))
 	{
@@ -1463,7 +1463,7 @@ cPlugin * cPluginManager::GetPlugin( const AString & a_Plugin) const
 {
 	for (PluginMap::const_iterator itr = m_Plugins.begin(); itr != m_Plugins.end(); ++itr)
 	{
-		if (itr->second == NULL) continue;
+		if (itr->second == nullptr) continue;
 		if (itr->second->GetName().compare(a_Plugin) == 0)
 		{
 			return itr->second;
@@ -1513,7 +1513,7 @@ bool cPluginManager::DisablePlugin(const AString & a_PluginName)
 	if (itr->first.compare(a_PluginName) == 0)  // _X 2013_02_01: wtf? Isn't this supposed to be what find() does?
 	{
 		m_DisablePluginList.push_back(itr->second);
-		itr->second = NULL;  // Get rid of this thing right away
+		itr->second = nullptr;  // Get rid of this thing right away
 		return true;
 	}
 	return false;
@@ -1558,12 +1558,12 @@ void cPluginManager::RemovePlugin(cPlugin * a_Plugin)
 	RemovePluginCommands(a_Plugin);
 	RemovePluginConsoleCommands(a_Plugin);
 	RemoveHooks(a_Plugin);
-	if (a_Plugin != NULL)
+	if (a_Plugin != nullptr)
 	{
 		a_Plugin->OnDisable();
 	}
 	delete a_Plugin;
-	a_Plugin = NULL;
+	a_Plugin = nullptr;
 }
 
 
@@ -1572,7 +1572,7 @@ void cPluginManager::RemovePlugin(cPlugin * a_Plugin)
 
 void cPluginManager::RemovePluginCommands(cPlugin * a_Plugin)
 {
-	if (a_Plugin != NULL)
+	if (a_Plugin != nullptr)
 	{
 		a_Plugin->ClearCommands();
 	}
@@ -1670,7 +1670,7 @@ cPluginManager::CommandResult cPluginManager::ForceExecuteCommand(cPlayer & a_Pl
 
 void cPluginManager::RemovePluginConsoleCommands(cPlugin * a_Plugin)
 {
-	if (a_Plugin != NULL)
+	if (a_Plugin != nullptr)
 	{
 		a_Plugin->ClearConsoleCommands();
 	}
@@ -1699,7 +1699,7 @@ bool cPluginManager::BindConsoleCommand(const AString & a_Command, cPlugin * a_P
 	CommandMap::iterator cmd = m_ConsoleCommands.find(a_Command);
 	if (cmd != m_ConsoleCommands.end())
 	{
-		if (cmd->second.m_Plugin == NULL)
+		if (cmd->second.m_Plugin == nullptr)
 		{
 			LOGWARNING("Console command \"%s\" is already bound internally by MCServer, cannot bind in plugin \"%s\".", a_Command.c_str(), a_Plugin->GetName().c_str());
 		}
@@ -1759,14 +1759,14 @@ bool cPluginManager::ExecuteConsoleCommand(const AStringVector & a_Split, cComma
 		return false;
 	}
 
-	if (cmd->second.m_Plugin == NULL)
+	if (cmd->second.m_Plugin == nullptr)
 	{
 		// This is a built-in command
 		return false;
 	}
 
 	// Ask plugins first if a command is okay to execute the console command:
-	if (CallHookExecuteCommand(NULL, a_Split))
+	if (CallHookExecuteCommand(nullptr, a_Split))
 	{
 		a_Output.Out("Command \"%s\" was stopped by the HOOK_EXECUTE_COMMAND hook", a_Split[0].c_str());
 		return false;
@@ -1788,7 +1788,7 @@ void cPluginManager::TabCompleteCommand(const AString & a_Text, AStringVector &
 			// Command name doesn't match
 			continue;
 		}
-		if ((a_Player != NULL) && !a_Player->HasPermission(itr->second.m_Permission))
+		if ((a_Player != nullptr) && !a_Player->HasPermission(itr->second.m_Permission))
 		{
 			// Player doesn't have permission for the command
 			continue;
@@ -1814,7 +1814,7 @@ bool cPluginManager::DoWithPlugin(const AString & a_PluginName, cPluginCallback
 {
 	// TODO: Implement locking for plugins
 	PluginMap::iterator itr = m_Plugins.find(a_PluginName);
-	if ((itr == m_Plugins.end()) || (itr->second == NULL))
+	if ((itr == m_Plugins.end()) || (itr->second == nullptr))
 	{
 		return false;
 	}
@@ -1848,7 +1848,7 @@ void cPluginManager::AddHook(cPlugin * a_Plugin, int a_Hook)
 {
 	if (!a_Plugin)
 	{
-		LOGWARN("Called cPluginManager::AddHook() with a_Plugin == NULL");
+		LOGWARN("Called cPluginManager::AddHook() with a_Plugin == nullptr");
 		return;
 	}
 	PluginList & Plugins = m_Hooks[a_Hook];
diff --git a/src/Bindings/PluginManager.h b/src/Bindings/PluginManager.h
index c69850be6..bc8c1f5e6 100644
--- a/src/Bindings/PluginManager.h
+++ b/src/Bindings/PluginManager.h
@@ -190,7 +190,7 @@ public:
 	bool CallHookCraftingNoRecipe         (cPlayer & a_Player, cCraftingGrid & a_Grid, cCraftingRecipe * a_Recipe);
 	bool CallHookDisconnect               (cClientHandle & a_Client, const AString & a_Reason);
 	bool CallHookEntityAddEffect          (cEntity & a_Entity, int a_EffectType, int a_EffectDurationTicks, int a_EffectIntensity, double a_DistanceModifier);
-	bool CallHookExecuteCommand           (cPlayer * a_Player, const AStringVector & a_Split);  // If a_Player == NULL, it is a console cmd
+	bool CallHookExecuteCommand           (cPlayer * a_Player, const AStringVector & a_Split);  // If a_Player == nullptr, it is a console cmd
 	bool CallHookExploded                 (cWorld & a_World, double a_ExplosionSize,   bool a_CanCauseFire,   double a_X, double a_Y, double a_Z, eExplosionSource a_Source, void * a_SourceData);
 	bool CallHookExploding                (cWorld & a_World, double & a_ExplosionSize, bool & a_CanCauseFire, double a_X, double a_Y, double a_Z, eExplosionSource a_Source, void * a_SourceData);
 	bool CallHookHandshake                (cClientHandle & a_ClientHandle, const AString & a_Username);
@@ -285,7 +285,7 @@ public:
 	bool ExecuteConsoleCommand(const AStringVector & a_Split, cCommandOutputCallback & a_Output);
 	
 	/** Appends all commands beginning with a_Text (case-insensitive) into a_Results.
-	If a_Player is not NULL, only commands for which the player has permissions are added.
+	If a_Player is not nullptr, only commands for which the player has permissions are added.
 	*/
 	void TabCompleteCommand(const AString & a_Text, AStringVector & a_Results, cPlayer * a_Player);
 	
diff --git a/src/Bindings/WebPlugin.cpp b/src/Bindings/WebPlugin.cpp
index eca1c74e6..5759b20e7 100644
--- a/src/Bindings/WebPlugin.cpp
+++ b/src/Bindings/WebPlugin.cpp
@@ -12,7 +12,7 @@
 cWebPlugin::cWebPlugin()
 {
 	cWebAdmin * WebAdmin = cRoot::Get()->GetWebAdmin();
-	if (WebAdmin != NULL)
+	if (WebAdmin != nullptr)
 	{
 		WebAdmin->AddPlugin(this);
 	}
@@ -25,7 +25,7 @@ cWebPlugin::cWebPlugin()
 cWebPlugin::~cWebPlugin()
 {
 	cWebAdmin * WebAdmin = cRoot::Get()->GetWebAdmin();
-	if (WebAdmin != NULL)
+	if (WebAdmin != nullptr)
 	{
 		WebAdmin->RemovePlugin(this);
 	}
@@ -65,7 +65,7 @@ std::pair< AString, AString > cWebPlugin::GetTabNameForRequest(const HTTPRequest
 
 	if (Split.size() > 1)
 	{
-		sWebPluginTab * Tab = NULL;
+		sWebPluginTab * Tab = nullptr;
 		if (Split.size() > 2)  // If we got the tab name, show that page
 		{
 			for (TabList::iterator itr = GetTabs().begin(); itr != GetTabs().end(); ++itr)
@@ -85,7 +85,7 @@ std::pair< AString, AString > cWebPlugin::GetTabNameForRequest(const HTTPRequest
 			}
 		}
 
-		if (Tab != NULL)
+		if (Tab != nullptr)
 		{
 			Names.first = Tab->Title;
 			Names.second = Tab->SafeTitle;
diff --git a/src/BlockArea.cpp b/src/BlockArea.cpp
index ba55528b8..4c3da0535 100644
--- a/src/BlockArea.cpp
+++ b/src/BlockArea.cpp
@@ -273,10 +273,10 @@ void MergeCombinatorMask(BLOCKTYPE & a_DstType, BLOCKTYPE a_SrcType, NIBBLETYPE
 // cBlockArea:
 
 cBlockArea::cBlockArea(void) :
-	m_BlockTypes(NULL),
-	m_BlockMetas(NULL),
-	m_BlockLight(NULL),
-	m_BlockSkyLight(NULL)
+	m_BlockTypes(nullptr),
+	m_BlockMetas(nullptr),
+	m_BlockLight(nullptr),
+	m_BlockSkyLight(nullptr)
 {
 }
 
@@ -295,10 +295,10 @@ cBlockArea::~cBlockArea()
 
 void cBlockArea::Clear(void)
 {
-	delete[] m_BlockTypes;    m_BlockTypes    = NULL;
-	delete[] m_BlockMetas;    m_BlockMetas    = NULL;
-	delete[] m_BlockLight;    m_BlockLight    = NULL;
-	delete[] m_BlockSkyLight; m_BlockSkyLight = NULL;
+	delete[] m_BlockTypes;    m_BlockTypes    = nullptr;
+	delete[] m_BlockMetas;    m_BlockMetas    = nullptr;
+	delete[] m_BlockLight;    m_BlockLight    = nullptr;
+	delete[] m_BlockSkyLight; m_BlockSkyLight = nullptr;
 	m_Origin.Set(0, 0, 0);
 	m_Size.Set(0, 0, 0);
 }
@@ -711,7 +711,7 @@ void cBlockArea::Merge(const cBlockArea & a_Src, int a_RelX, int a_RelY, int a_R
 	const NIBBLETYPE * SrcMetas = a_Src.GetBlockMetas();
 	NIBBLETYPE * DstMetas = m_BlockMetas;
 	
-	bool IsDummyMetas = ((SrcMetas == NULL) || (DstMetas == NULL));
+	bool IsDummyMetas = ((SrcMetas == nullptr) || (DstMetas == nullptr));
 	
 	if (IsDummyMetas)
 	{
@@ -1013,8 +1013,8 @@ void cBlockArea::RotateCCW(void)
 	}  // for x
 	std::swap(m_BlockTypes, NewTypes);
 	std::swap(m_BlockMetas, NewMetas);
-	delete[] NewTypes;   NewTypes = NULL;
-	delete[] NewMetas;   NewMetas = NULL;
+	delete[] NewTypes;   NewTypes = nullptr;
+	delete[] NewMetas;   NewMetas = nullptr;
 
 	std::swap(m_Size.x, m_Size.z);
 }
@@ -1058,8 +1058,8 @@ void cBlockArea::RotateCW(void)
 	}  // for x
 	std::swap(m_BlockTypes, NewTypes);
 	std::swap(m_BlockMetas, NewMetas);
-	delete[] NewTypes;   NewTypes = NULL;
-	delete[] NewMetas;   NewMetas = NULL;
+	delete[] NewTypes;   NewTypes = nullptr;
+	delete[] NewMetas;   NewMetas = nullptr;
 
 	std::swap(m_Size.x, m_Size.z);
 }
@@ -1206,7 +1206,7 @@ void cBlockArea::RotateCCWNoMeta(void)
 			}  // for z
 		}  // for x
 		std::swap(m_BlockTypes, NewTypes);
-		delete[] NewTypes;   NewTypes = NULL;
+		delete[] NewTypes;   NewTypes = nullptr;
 	}
 	if (HasBlockMetas())
 	{
@@ -1224,7 +1224,7 @@ void cBlockArea::RotateCCWNoMeta(void)
 			}  // for z
 		}  // for x
 		std::swap(m_BlockMetas, NewMetas);
-		delete[] NewMetas;   NewMetas = NULL;
+		delete[] NewMetas;   NewMetas = nullptr;
 	}
 	std::swap(m_Size.x, m_Size.z);
 }
@@ -1251,7 +1251,7 @@ void cBlockArea::RotateCWNoMeta(void)
 			}  // for x
 		}  // for z
 		std::swap(m_BlockTypes, NewTypes);
-		delete[] NewTypes;   NewTypes = NULL;
+		delete[] NewTypes;   NewTypes = nullptr;
 	}
 	if (HasBlockMetas())
 	{
@@ -1269,7 +1269,7 @@ void cBlockArea::RotateCWNoMeta(void)
 			}  // for x
 		}  // for z
 		std::swap(m_BlockMetas, NewMetas);
-		delete[] NewMetas;   NewMetas = NULL;
+		delete[] NewMetas;   NewMetas = nullptr;
 	}
 	std::swap(m_Size.x, m_Size.z);
 }
@@ -1391,7 +1391,7 @@ void cBlockArea::MirrorYZNoMeta(void)
 
 void cBlockArea::SetRelBlockType(int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE a_BlockType)
 {
-	if (m_BlockTypes == NULL)
+	if (m_BlockTypes == nullptr)
 	{
 		LOGWARNING("cBlockArea: BlockTypes have not been read!");
 		return;
@@ -1468,7 +1468,7 @@ void cBlockArea::SetBlockSkyLight(int a_BlockX, int a_BlockY, int a_BlockZ, NIBB
 
 BLOCKTYPE cBlockArea::GetRelBlockType(int a_RelX, int a_RelY, int a_RelZ) const
 {
-	if (m_BlockTypes == NULL)
+	if (m_BlockTypes == nullptr)
 	{
 		LOGWARNING("cBlockArea: BlockTypes have not been read!");
 		return E_BLOCK_AIR;
@@ -1555,7 +1555,7 @@ void cBlockArea::SetBlockTypeMeta(int a_BlockX, int a_BlockY, int a_BlockZ, BLOC
 void cBlockArea::SetRelBlockTypeMeta(int a_RelX,   int a_RelY,   int a_RelZ,   BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta)
 {
 	int idx = MakeIndex(a_RelX, a_RelY, a_RelZ);
-	if (m_BlockTypes == NULL)
+	if (m_BlockTypes == nullptr)
 	{
 		LOGWARNING("%s: BlockTypes not available but requested to be written to.", __FUNCTION__);
 	}
@@ -1563,7 +1563,7 @@ void cBlockArea::SetRelBlockTypeMeta(int a_RelX,   int a_RelY,   int a_RelZ,   B
 	{
 		m_BlockTypes[idx] = a_BlockType;
 	}
-	if (m_BlockMetas == NULL)
+	if (m_BlockMetas == nullptr)
 	{
 		LOGWARNING("%s: BlockMetas not available but requested to be written to.", __FUNCTION__);
 	}
@@ -1589,7 +1589,7 @@ void cBlockArea::GetBlockTypeMeta(int a_BlockX, int a_BlockY, int a_BlockZ, BLOC
 void cBlockArea::GetRelBlockTypeMeta(int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE & a_BlockType, NIBBLETYPE & a_BlockMeta) const
 {
 	int idx = MakeIndex(a_RelX, a_RelY, a_RelZ);
-	if (m_BlockTypes == NULL)
+	if (m_BlockTypes == nullptr)
 	{
 		LOGWARNING("cBlockArea: BlockTypes have not been read!");
 		a_BlockType = E_BLOCK_AIR;
@@ -1599,7 +1599,7 @@ void cBlockArea::GetRelBlockTypeMeta(int a_RelX, int a_RelY, int a_RelZ, BLOCKTY
 		a_BlockType = m_BlockTypes[idx];
 	}
 	
-	if (m_BlockMetas == NULL)
+	if (m_BlockMetas == nullptr)
 	{
 		LOGWARNING("cBlockArea: BlockMetas have not been read!");
 		a_BlockMeta = 0;
@@ -1617,19 +1617,19 @@ void cBlockArea::GetRelBlockTypeMeta(int a_RelX, int a_RelY, int a_RelZ, BLOCKTY
 int cBlockArea::GetDataTypes(void) const
 {
 	int res = 0;
-	if (m_BlockTypes != NULL)
+	if (m_BlockTypes != nullptr)
 	{
 		res |= baTypes;
 	}
-	if (m_BlockMetas != NULL)
+	if (m_BlockMetas != nullptr)
 	{
 		res |= baMetas;
 	}
-	if (m_BlockLight != NULL)
+	if (m_BlockLight != nullptr)
 	{
 		res |= baLight;
 	}
-	if (m_BlockSkyLight != NULL)
+	if (m_BlockSkyLight != nullptr)
 	{
 		res |= baSkyLight;
 	}
@@ -1642,12 +1642,12 @@ int cBlockArea::GetDataTypes(void) const
 
 bool cBlockArea::SetSize(int a_SizeX, int a_SizeY, int a_SizeZ, int a_DataTypes)
 {
-	ASSERT(m_BlockTypes == NULL);  // Has been cleared
+	ASSERT(m_BlockTypes == nullptr);  // Has been cleared
 	
 	if (a_DataTypes & baTypes)
 	{
 		m_BlockTypes = new BLOCKTYPE[a_SizeX * a_SizeY * a_SizeZ];
-		if (m_BlockTypes == NULL)
+		if (m_BlockTypes == nullptr)
 		{
 			return false;
 		}
@@ -1655,36 +1655,36 @@ bool cBlockArea::SetSize(int a_SizeX, int a_SizeY, int a_SizeZ, int a_DataTypes)
 	if (a_DataTypes & baMetas)
 	{
 		m_BlockMetas = new NIBBLETYPE[a_SizeX * a_SizeY * a_SizeZ];
-		if (m_BlockMetas == NULL)
+		if (m_BlockMetas == nullptr)
 		{
 			delete[] m_BlockTypes;
-			m_BlockTypes = NULL;
+			m_BlockTypes = nullptr;
 			return false;
 		}
 	}
 	if (a_DataTypes & baLight)
 	{
 		m_BlockLight = new NIBBLETYPE[a_SizeX * a_SizeY * a_SizeZ];
-		if (m_BlockLight == NULL)
+		if (m_BlockLight == nullptr)
 		{
 			delete[] m_BlockMetas;
-			m_BlockMetas = NULL;
+			m_BlockMetas = nullptr;
 			delete[] m_BlockTypes;
-			m_BlockTypes = NULL;
+			m_BlockTypes = nullptr;
 			return false;
 		}
 	}
 	if (a_DataTypes & baSkyLight)
 	{
 		m_BlockSkyLight = new NIBBLETYPE[a_SizeX * a_SizeY * a_SizeZ];
-		if (m_BlockSkyLight == NULL)
+		if (m_BlockSkyLight == nullptr)
 		{
 			delete[] m_BlockLight;
-			m_BlockLight = NULL;
+			m_BlockLight = nullptr;
 			delete[] m_BlockMetas;
-			m_BlockMetas = NULL;
+			m_BlockMetas = nullptr;
 			delete[] m_BlockTypes;
-			m_BlockTypes = NULL;
+			m_BlockTypes = nullptr;
 			return false;
 		}
 	}
@@ -1714,7 +1714,7 @@ int cBlockArea::MakeIndex(int a_RelX, int a_RelY, int a_RelZ) const
 
 void cBlockArea::SetRelNibble(int a_RelX, int a_RelY, int a_RelZ, NIBBLETYPE a_Value, NIBBLETYPE * a_Array)
 {
-	if (a_Array == NULL)
+	if (a_Array == nullptr)
 	{
 		LOGWARNING("cBlockArea: datatype has not been read!");
 		return;
@@ -1737,7 +1737,7 @@ void cBlockArea::SetNibble(int a_BlockX, int a_BlockY, int a_BlockZ, NIBBLETYPE
 
 NIBBLETYPE cBlockArea::GetRelNibble(int a_RelX, int a_RelY, int a_RelZ, NIBBLETYPE * a_Array) const
 {
-	if (a_Array == NULL)
+	if (a_Array == nullptr)
 	{
 		LOGWARNING("cBlockArea: datatype has not been read!");
 		return 16;
@@ -1896,7 +1896,7 @@ void cBlockArea::cChunkReader::ChunkData(const cChunkData & a_BlockBuffer)
 	}
 	
 	// Copy the blocktypes:
-	if (m_Area.m_BlockTypes != NULL)
+	if (m_Area.m_BlockTypes != nullptr)
 	{
 		for (int y = 0; y < SizeY; y++)
 		{
@@ -1917,7 +1917,7 @@ void cBlockArea::cChunkReader::ChunkData(const cChunkData & a_BlockBuffer)
 	}
 
 	// Copy the block metas:
-	if (m_Area.m_BlockMetas != NULL)
+	if (m_Area.m_BlockMetas != nullptr)
 	{
 		for (int y = 0; y < SizeY; y++)
 		{
@@ -1938,7 +1938,7 @@ void cBlockArea::cChunkReader::ChunkData(const cChunkData & a_BlockBuffer)
 	}
 
 	// Copy the blocklight:
-	if (m_Area.m_BlockLight != NULL)
+	if (m_Area.m_BlockLight != nullptr)
 	{
 		for (int y = 0; y < SizeY; y++)
 		{
@@ -1959,7 +1959,7 @@ void cBlockArea::cChunkReader::ChunkData(const cChunkData & a_BlockBuffer)
 	}
 
 	// Copy the skylight:
-	if (m_Area.m_BlockSkyLight != NULL)
+	if (m_Area.m_BlockSkyLight != nullptr)
 	{
 		for (int y = 0; y < SizeY; y++)
 		{
diff --git a/src/BlockArea.h b/src/BlockArea.h
index 003872635..348e960dd 100644
--- a/src/BlockArea.h
+++ b/src/BlockArea.h
@@ -32,7 +32,7 @@ class cBlockArea
 	// tolua_end
 	DISALLOW_COPY_AND_ASSIGN(cBlockArea);
 	// tolua_begin
-
+	
 public:
 
 	/** What data is to be queried (bit-mask) */
@@ -43,7 +43,7 @@ public:
 		baLight    = 4,
 		baSkyLight = 8,
 	} ;
-
+	
 	/** The per-block strategy to use when merging another block area into this object.
 	See the Merge function for the description of these */
 	enum eMergeStrategy
@@ -56,64 +56,64 @@ public:
 		msDifference,
 		msMask,
 	} ;
-
+	
 	cBlockArea(void);
 	~cBlockArea();
-
+	
 	/** Clears the data stored to reclaim memory */
 	void Clear(void);
-
+	
 	/** Creates a new area of the specified size and contents.
 	Origin is set to all zeroes.
 	BlockTypes are set to air, block metas to zero, blocklights to zero and skylights to full light.
 	*/
 	void Create(int a_SizeX, int a_SizeY, int a_SizeZ, int a_DataTypes = baTypes | baMetas);
-
+	
 	/** Creates a new area of the specified size and contents.
 	Origin is set to all zeroes.
 	BlockTypes are set to air, block metas to zero, blocklights to zero and skylights to full light.
 	*/
 	void Create(const Vector3i & a_Size, int a_DataTypes = baTypes | baMetas);
-
+	
 	/** Resets the origin. No other changes are made, contents are untouched. */
 	void SetOrigin(int a_OriginX, int a_OriginY, int a_OriginZ);
-
+	
 	/** Resets the origin. No other changes are made, contents are untouched. */
 	void SetOrigin(const Vector3i & a_Origin);
-
+	
 	/** Reads an area of blocks specified. Returns true if successful. All coords are inclusive. */
 	bool Read(cForEachChunkProvider * a_ForEachChunkProvider, int a_MinBlockX, int a_MaxBlockX, int a_MinBlockY, int a_MaxBlockY, int a_MinBlockZ, int a_MaxBlockZ, int a_DataTypes = baTypes | baMetas);
-
+	
 	/** Reads an area of blocks specified. Returns true if successful. The bounds are included in the read area. */
 	bool Read(cForEachChunkProvider * a_ForEachChunkProvider, const cCuboid & a_Bounds, int a_DataTypes = baTypes | baMetas);
-
+	
 	/** Reads an area of blocks specified. Returns true if successful. The bounds are included in the read area. */
 	bool Read(cForEachChunkProvider * a_ForEachChunkProvider, const Vector3i & a_Point1, const Vector3i & a_Point2, int a_DataTypes = baTypes | baMetas);
-
+	
 	// TODO: Write() is not too good an interface: if it fails, there's no way to repeat only for the parts that didn't write
 	// A better way may be to return a list of cBlockAreas for each part that didn't succeed writing, so that the caller may try again
-
+	
 	/** Writes the area back into cWorld at the coords specified. Returns true if successful in all chunks, false if only partially / not at all */
 	bool Write(cForEachChunkProvider * a_ForEachChunkProvider, int a_MinBlockX, int a_MinBlockY, int a_MinBlockZ, int a_DataTypes = baTypes | baMetas);
-
+	
 	/** Writes the area back into cWorld at the coords specified. Returns true if successful in all chunks, false if only partially / not at all */
 	bool Write(cForEachChunkProvider * a_ForEachChunkProvider, const Vector3i & a_MinCoords, int a_DataTypes = baTypes | baMetas);
-
+	
 	/** Copies this object's contents into the specified BlockArea. */
 	void CopyTo(cBlockArea & a_Into) const;
-
+	
 	/** Copies the contents from the specified BlockArea into this object. */
 	void CopyFrom(const cBlockArea & a_From);
-
+	
 	/** For testing purposes only, dumps the area into a file. */
 	void DumpToRawFile(const AString & a_FileName);
-
+	
 	/** Crops the internal contents by the specified amount of blocks from each border. */
 	void Crop(int a_AddMinX, int a_SubMaxX, int a_AddMinY, int a_SubMaxY, int a_AddMinZ, int a_SubMaxZ);
-
+	
 	/** Expands the internal contents by the specified amount of blocks from each border */
 	void Expand(int a_SubMinX, int a_AddMaxX, int a_SubMinY, int a_AddMaxY, int a_SubMinZ, int a_AddMaxZ);
-
+	
 	/** Merges another block area into this one, using the specified block combinating strategy
 	This function combines another BlockArea into the current object.
 	The strategy parameter specifies how individual blocks are combined together, using the table below.
@@ -125,7 +125,7 @@ public:
 	| A    | air | air         | A         | A         |
 	| air  | B   | B           | B         | B         |
 	| A    | B   | B           | A         | B         |
-
+	
 	So to sum up:
 	- msOverwrite completely overwrites all blocks with the Src's blocks
 	- msFillAir overwrites only those blocks that were air
@@ -147,7 +147,7 @@ public:
 	| mycelium | stone  | stone  |    ... and mycelium
 	| A        | stone  | A      |    ... but nothing else
 	| A        | *      | A      |  Everything else is left as it is
-
+	
 	msSpongePrint:
 	Used for most generators, it allows carving out air pockets, too, and uses the Sponge as the NOP block
 	|    area block     |        |
@@ -155,7 +155,7 @@ public:
 	+----------+--------+--------+
 	| A        | sponge | A      |  Sponge is the NOP block
 	| *        | B      | B      |  Everything else overwrites anything
-
+	
 	msMask:
 	Combines two areas, the blocks that are the same are kept, differing ones are reset to air
 	|  area block  |        |
@@ -166,68 +166,68 @@ public:
 
 	*/
 	void Merge(const cBlockArea & a_Src, int a_RelX, int a_RelY, int a_RelZ, eMergeStrategy a_Strategy);
-
+	
 	/** Merges another block area into this one, using the specified block combinating strategy.
 	See Merge() above for details. */
 	void Merge(const cBlockArea & a_Src, const Vector3i & a_RelMinCoords, eMergeStrategy a_Strategy);
-
+	
 	/** Fills the entire block area with the specified data */
 	void Fill(int a_DataTypes, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta = 0, NIBBLETYPE a_BlockLight = 0, NIBBLETYPE a_BlockSkyLight = 0x0f);
-
+	
 	/** Fills a cuboid inside the block area with the specified data */
 	void FillRelCuboid(int a_MinRelX, int a_MaxRelX, int a_MinRelY, int a_MaxRelY, int a_MinRelZ, int a_MaxRelZ,
 		int a_DataTypes, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta = 0,
 		NIBBLETYPE a_BlockLight = 0, NIBBLETYPE a_BlockSkyLight = 0x0f
 	);
-
+	
 	/** Fills a cuboid inside the block area with the specified data. a_Cuboid must be sorted. */
 	void FillRelCuboid(const cCuboid & a_RelCuboid,
 		int a_DataTypes, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta = 0,
 		NIBBLETYPE a_BlockLight = 0, NIBBLETYPE a_BlockSkyLight = 0x0f
 	);
-
+	
 	/** Draws a line from between two points with the specified data */
 	void RelLine(int a_RelX1, int a_RelY1, int a_RelZ1, int a_RelX2, int a_RelY2, int a_RelZ2,
 		int a_DataTypes, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta = 0,
 		NIBBLETYPE a_BlockLight = 0, NIBBLETYPE a_BlockSkyLight = 0x0f
 	);
-
+	
 	/** Draws a line from between two points with the specified data */
 	void RelLine(const Vector3i & a_Point1, const Vector3i & a_Point2,
 		int a_DataTypes, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta = 0,
 		NIBBLETYPE a_BlockLight = 0, NIBBLETYPE a_BlockSkyLight = 0x0f
 	);
-
+	
 	/** Rotates the entire area counter-clockwise around the Y axis */
 	void RotateCCW(void);
-
+	
 	/** Rotates the entire area clockwise around the Y axis */
 	void RotateCW(void);
-
+	
 	/** Mirrors the entire area around the XY plane */
 	void MirrorXY(void);
-
+	
 	/** Mirrors the entire area around the XZ plane */
 	void MirrorXZ(void);
-
+	
 	/** Mirrors the entire area around the YZ plane */
 	void MirrorYZ(void);
-
+	
 	/** Rotates the entire area counter-clockwise around the Y axis, doesn't use blockhandlers for block meta */
 	void RotateCCWNoMeta(void);
-
+	
 	/** Rotates the entire area clockwise around the Y axis, doesn't use blockhandlers for block meta */
 	void RotateCWNoMeta(void);
-
+	
 	/** Mirrors the entire area around the XY plane, doesn't use blockhandlers for block meta */
 	void MirrorXYNoMeta(void);
-
+	
 	/** Mirrors the entire area around the XZ plane, doesn't use blockhandlers for block meta */
 	void MirrorXZNoMeta(void);
-
+	
 	/** Mirrors the entire area around the YZ plane, doesn't use blockhandlers for block meta */
 	void MirrorYZNoMeta(void);
-
+	
 	// Setters:
 	void SetRelBlockType    (int a_RelX,   int a_RelY,   int a_RelZ,   BLOCKTYPE  a_BlockType);
 	void SetBlockType       (int a_BlockX, int a_BlockY, int a_BlockZ, BLOCKTYPE  a_BlockType);
@@ -253,80 +253,80 @@ public:
 
 	void SetBlockTypeMeta   (int a_BlockX, int a_BlockY, int a_BlockZ, BLOCKTYPE a_BlockType,   NIBBLETYPE a_BlockMeta);
 	void SetRelBlockTypeMeta(int a_RelX,   int a_RelY,   int a_RelZ,   BLOCKTYPE a_BlockType,   NIBBLETYPE a_BlockMeta);
-
+	
 	// tolua_end
-
+	
 	// These need manual exporting, tolua generates the binding as requiring 2 extra input params
 	void GetBlockTypeMeta   (int a_BlockX, int a_BlockY, int a_BlockZ, BLOCKTYPE & a_BlockType, NIBBLETYPE & a_BlockMeta) const;
 	void GetRelBlockTypeMeta(int a_RelX,   int a_RelY,   int a_RelZ,   BLOCKTYPE & a_BlockType, NIBBLETYPE & a_BlockMeta) const;
-
+	
 	// GetSize() is already exported manually to return 3 numbers, can't auto-export
 	const Vector3i & GetSize(void) const { return m_Size; }
-
+	
 	// GetOrigin() is already exported manually to return 3 numbers, can't auto-export
 	const Vector3i & GetOrigin(void) const { return m_Origin; }
-
+	
 	// tolua_begin
-
+	
 	int GetSizeX(void) const { return m_Size.x; }
 	int GetSizeY(void) const { return m_Size.y; }
 	int GetSizeZ(void) const { return m_Size.z; }
-
+	
 	/** Returns the volume of the area, as number of blocks */
 	int GetVolume(void) const { return m_Size.x * m_Size.y * m_Size.z; }
-
+	
 	int GetOriginX(void) const { return m_Origin.x; }
 	int GetOriginY(void) const { return m_Origin.y; }
 	int GetOriginZ(void) const { return m_Origin.z; }
-
+	
 	/** Returns the datatypes that are stored in the object (bitmask of baXXX values) */
 	int GetDataTypes(void) const;
-
-	bool HasBlockTypes    (void) const { return (m_BlockTypes    != NULL); }
-	bool HasBlockMetas    (void) const { return (m_BlockMetas    != NULL); }
-	bool HasBlockLights   (void) const { return (m_BlockLight    != NULL); }
-	bool HasBlockSkyLights(void) const { return (m_BlockSkyLight != NULL); }
-
+	
+	bool HasBlockTypes    (void) const { return (m_BlockTypes    != nullptr); }
+	bool HasBlockMetas    (void) const { return (m_BlockMetas    != nullptr); }
+	bool HasBlockLights   (void) const { return (m_BlockLight    != nullptr); }
+	bool HasBlockSkyLights(void) const { return (m_BlockSkyLight != nullptr); }
+	
 	// tolua_end
-
+	
 	// Clients can use these for faster access to all blocktypes. Be careful though!
 	/** Returns the internal pointer to the block types */
 	BLOCKTYPE *  GetBlockTypes   (void) const { return m_BlockTypes; }
 	NIBBLETYPE * GetBlockMetas   (void) const { return m_BlockMetas; }     // NOTE: one byte per block!
 	NIBBLETYPE * GetBlockLight   (void) const { return m_BlockLight; }     // NOTE: one byte per block!
 	NIBBLETYPE * GetBlockSkyLight(void) const { return m_BlockSkyLight; }  // NOTE: one byte per block!
-	size_t       GetBlockCount(void) const { return static_cast<size_t>(m_Size.x * m_Size.y * m_Size.z); }
+	size_t       GetBlockCount(void) const { return (size_t)(m_Size.x * m_Size.y * m_Size.z); }
 	int MakeIndex(int a_RelX, int a_RelY, int a_RelZ) const;
 
 protected:
 	friend class cChunkDesc;
 	friend class cSchematicFileSerializer;
-
+	
 	class cChunkReader :
 		public cChunkDataCallback
 	{
 	public:
 		cChunkReader(cBlockArea & a_Area);
-
+		
 	protected:
 		cBlockArea & m_Area;
 		Vector3i m_Origin;
 		int m_CurrentChunkX;
 		int m_CurrentChunkZ;
-
+		
 		void CopyNibbles(NIBBLETYPE * a_AreaDst, const NIBBLETYPE * a_ChunkSrc);
-
+		
 		// cChunkDataCallback overrides:
 		virtual bool Coords(int a_ChunkX, int a_ChunkZ) override;
 		virtual void ChunkData(const cChunkData &  a_BlockTypes) override;
 	} ;
-
+	
 	typedef NIBBLETYPE * NIBBLEARRAY;
-
-
+	
+	
 	Vector3i m_Origin;
 	Vector3i m_Size;
-
+	
 	/** An extra data value sometimes stored in the .schematic file. Used mainly by the WorldEdit plugin.
 	cBlockArea doesn't use this value in any way. */
 	Vector3i m_WEOffset;
@@ -335,10 +335,10 @@ protected:
 	NIBBLETYPE * m_BlockMetas;     // Each meta is stored as a separate byte for faster access
 	NIBBLETYPE * m_BlockLight;     // Each light value is stored as a separate byte for faster access
 	NIBBLETYPE * m_BlockSkyLight;  // Each light value is stored as a separate byte for faster access
-
+	
 	/** Clears the data stored and prepares a fresh new block area with the specified dimensions */
 	bool SetSize(int a_SizeX, int a_SizeY, int a_SizeZ, int a_DataTypes);
-
+	
 	// Basic Setters:
 	void SetRelNibble(int a_RelX,   int a_RelY,   int a_RelZ,   NIBBLETYPE a_Value, NIBBLETYPE * a_Array);
 	void SetNibble   (int a_BlockX, int a_BlockY, int a_BlockZ, NIBBLETYPE a_Value, NIBBLETYPE * a_Array);
@@ -346,11 +346,11 @@ protected:
 	// Basic Getters:
 	NIBBLETYPE GetRelNibble(int a_RelX,   int a_RelY,   int a_RelZ,   NIBBLETYPE * a_Array) const;
 	NIBBLETYPE GetNibble   (int a_BlockX, int a_BlockY, int a_BlockZ, NIBBLETYPE * a_Array) const;
-
+	
 	// Crop helpers:
 	void CropBlockTypes(int a_AddMinX, int a_SubMaxX, int a_AddMinY, int a_SubMaxY, int a_AddMinZ, int a_SubMaxZ);
 	void CropNibbles   (NIBBLEARRAY & a_Array, int a_AddMinX, int a_SubMaxX, int a_AddMinY, int a_SubMaxY, int a_AddMinZ, int a_SubMaxZ);
-
+	
 	// Expand helpers:
 	void ExpandBlockTypes(int a_SubMinX, int a_AddMaxX, int a_SubMinY, int a_AddMaxY, int a_SubMinZ, int a_AddMaxZ);
 	void ExpandNibbles   (NIBBLEARRAY & a_Array, int a_SubMinX, int a_AddMaxX, int a_SubMinY, int a_AddMaxY, int a_SubMinZ, int a_AddMaxZ);
@@ -361,9 +361,13 @@ protected:
 		int a_DataTypes, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta,
 		NIBBLETYPE a_BlockLight, NIBBLETYPE a_BlockSkyLight
 	);
-
+	
 	template <bool MetasValid>
 	void MergeByStrategy(const cBlockArea & a_Src, int a_RelX, int a_RelY, int a_RelZ, eMergeStrategy a_Strategy, const NIBBLETYPE * SrcMetas, NIBBLETYPE * DstMetas);
 	// tolua_begin
 } ;
 // tolua_end
+
+
+
+
diff --git a/src/BlockEntities/BeaconEntity.cpp b/src/BlockEntities/BeaconEntity.cpp
index fe5bcf143..85819446c 100644
--- a/src/BlockEntities/BeaconEntity.cpp
+++ b/src/BlockEntities/BeaconEntity.cpp
@@ -2,7 +2,6 @@
 #include "Globals.h"  // NOTE: MSVC stupidness requires this to be the same across all modules
 
 #include "BeaconEntity.h"
-#include <algorithm>
 #include "../BlockArea.h"
 #include "../Entities/Player.h"
 
@@ -98,7 +97,7 @@ bool cBeaconEntity::SetPrimaryEffect(cEntityEffect::eType a_Effect)
 	m_PrimaryEffect = a_Effect;
 
 	// Send window update:
-	if (GetWindow() != NULL)
+	if (GetWindow() != nullptr)
 	{
 		GetWindow()->SetProperty(1, m_PrimaryEffect);
 	}
@@ -120,7 +119,7 @@ bool cBeaconEntity::SetSecondaryEffect(cEntityEffect::eType a_Effect)
 	m_SecondaryEffect = a_Effect;
 
 	// Send window update:
-	if (GetWindow() != NULL)
+	if (GetWindow() != nullptr)
 	{
 		GetWindow()->SetProperty(2, m_SecondaryEffect);
 	}
@@ -185,7 +184,7 @@ void cBeaconEntity::UpdateBeacon(void)
 	if (m_BeaconLevel != OldBeaconLevel)
 	{
 		// Send window update:
-		if (GetWindow() != NULL)
+		if (GetWindow() != nullptr)
 		{
 			GetWindow()->SetProperty(0, m_BeaconLevel);
 		}
@@ -228,7 +227,10 @@ void cBeaconEntity::GiveEffects(void)
 		virtual bool Item(cPlayer * a_Player)
 		{
 			Vector3d PlayerPosition = Vector3d(a_Player->GetPosition());
-			PlayerPosition.y = std::min(static_cast<double>(m_PosY), PlayerPosition.y);
+			if (PlayerPosition.y > (double)m_PosY)
+			{
+				PlayerPosition.y = (double)m_PosY;
+			}
 
 			// TODO: Vanilla minecraft uses an AABB check instead of a radius one
 			Vector3d BeaconPosition = Vector3d(m_PosX, m_PosY, m_PosZ);
@@ -253,7 +255,7 @@ void cBeaconEntity::GiveEffects(void)
 			, m_PrimaryEffect(a_PrimaryEffect)
 			, m_SecondaryEffect(a_SecondaryEffect)
 			, m_EffectLevel(a_EffectLevel)
-		{}
+		{};
 
 	} PlayerCallback(Radius, m_PosX, m_PosY, m_PosZ, m_PrimaryEffect, SecondaryEffect, EffectLevel);
 	GetWorld()->ForEachPlayer(PlayerCallback);
@@ -281,13 +283,13 @@ bool cBeaconEntity::Tick(float a_Dt, cChunk & a_Chunk)
 void cBeaconEntity::UsedBy(cPlayer * a_Player)
 {
 	cWindow * Window = GetWindow();
-	if (Window == NULL)
+	if (Window == nullptr)
 	{
 		OpenWindow(new cBeaconWindow(m_PosX, m_PosY, m_PosZ, this));
 		Window = GetWindow();
 	}
-
-	if (Window != NULL)
+	
+	if (Window != nullptr)
 	{
 		// if (a_Player->GetWindow() != Window)
 		// -> Because mojang doesn't send a 'close window' packet when you click the cancel button in the beacon inventory ...
@@ -305,3 +307,7 @@ void cBeaconEntity::SendTo(cClientHandle & a_Client)
 {
 	a_Client.SendUpdateBlockEntity(*this);
 }
+
+
+
+
diff --git a/src/BlockEntities/BlockEntity.cpp b/src/BlockEntities/BlockEntity.cpp
index 05ad03a3d..3d96e891e 100644
--- a/src/BlockEntities/BlockEntity.cpp
+++ b/src/BlockEntities/BlockEntity.cpp
@@ -48,7 +48,7 @@ cBlockEntity * cBlockEntity::CreateByBlockType(BLOCKTYPE a_BlockType, NIBBLETYPE
 		__FUNCTION__, a_BlockType, ItemTypeToString(a_BlockType).c_str()
 	);
 	ASSERT(!"Requesting creation of an unknown block entity");
-	return NULL;
+	return nullptr;
 }
 
 
diff --git a/src/BlockEntities/BlockEntity.h b/src/BlockEntities/BlockEntity.h
index b04d20340..ffd6ee856 100644
--- a/src/BlockEntities/BlockEntity.h
+++ b/src/BlockEntities/BlockEntity.h
@@ -70,8 +70,8 @@ public:
 	
 	/// Creates a new block entity for the specified block type
 	/// If a_World is valid, then the entity is created bound to that world
-	/// Returns NULL for unknown block types
-	static cBlockEntity * CreateByBlockType(BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta, int a_BlockX, int a_BlockY, int a_BlockZ, cWorld * a_World = NULL);
+	/// Returns nullptr for unknown block types
+	static cBlockEntity * CreateByBlockType(BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta, int a_BlockX, int a_BlockY, int a_BlockZ, cWorld * a_World = nullptr);
 	
 	static const char * GetClassStatic(void)  // Needed for ManualBindings's ForEach templates
 	{
diff --git a/src/BlockEntities/BlockEntityWithItems.h b/src/BlockEntities/BlockEntityWithItems.h
index cb7bc2fb4..8c7d4749b 100644
--- a/src/BlockEntities/BlockEntityWithItems.h
+++ b/src/BlockEntities/BlockEntityWithItems.h
@@ -47,7 +47,7 @@ public:
 	virtual void Destroy(void) override
 	{
 		// Drop the contents as pickups:
-		ASSERT(m_World != NULL);
+		ASSERT(m_World != nullptr);
 		cItems Pickups;
 		m_Contents.CopyToItems(Pickups);
 		m_Contents.Clear();
@@ -78,9 +78,9 @@ protected:
 	{
 		UNUSED(a_SlotNum);
 		ASSERT(a_Grid == &m_Contents);
-		if (m_World != NULL)
+		if (m_World != nullptr)
 		{
-			if (GetWindow() != NULL)
+			if (GetWindow() != nullptr)
 			{
 				GetWindow()->BroadcastWholeWindow();
 			}
diff --git a/src/BlockEntities/ChestEntity.cpp b/src/BlockEntities/ChestEntity.cpp
index 19d88b646..0cd9c66e0 100644
--- a/src/BlockEntities/ChestEntity.cpp
+++ b/src/BlockEntities/ChestEntity.cpp
@@ -23,7 +23,7 @@ cChestEntity::cChestEntity(int a_BlockX, int a_BlockY, int a_BlockZ, cWorld * a_
 cChestEntity::~cChestEntity()
 {
 	cWindow * Window = GetWindow();
-	if (Window != NULL)
+	if (Window != nullptr)
 	{
 		Window->OwnerDestroyed();
 	}
@@ -49,14 +49,14 @@ void cChestEntity::UsedBy(cPlayer * a_Player)
 {
 	// If the window is not created, open it anew:
 	cWindow * Window = GetWindow();
-	if (Window == NULL)
+	if (Window == nullptr)
 	{
 		OpenNewWindow();
 		Window = GetWindow();
 	}
 	
 	// Open the window for the player:
-	if (Window != NULL)
+	if (Window != nullptr)
 	{
 		if (a_Player->GetWindow() != Window)
 		{
diff --git a/src/BlockEntities/CommandBlockEntity.cpp b/src/BlockEntities/CommandBlockEntity.cpp
index 1a5a3f01e..b7f938ffd 100644
--- a/src/BlockEntities/CommandBlockEntity.cpp
+++ b/src/BlockEntities/CommandBlockEntity.cpp
@@ -154,7 +154,7 @@ void cCommandBlockEntity::SendTo(cClientHandle & a_Client)
 
 void cCommandBlockEntity::Execute()
 {
-	ASSERT(m_World != NULL);  // Execute should not be called before the command block is attached to a world
+	ASSERT(m_World != nullptr);  // Execute should not be called before the command block is attached to a world
 	
 	if (!m_World->AreCommandBlocksEnabled())
 	{
diff --git a/src/BlockEntities/DispenserEntity.cpp b/src/BlockEntities/DispenserEntity.cpp
index 157862bd1..42a0476b6 100644
--- a/src/BlockEntities/DispenserEntity.cpp
+++ b/src/BlockEntities/DispenserEntity.cpp
@@ -28,7 +28,7 @@ void cDispenserEntity::DropSpenseFromSlot(cChunk & a_Chunk, int a_SlotNum)
 	NIBBLETYPE Meta = a_Chunk.GetMeta(m_RelX, m_PosY, m_RelZ);
 	AddDropSpenserDir(DispX, DispY, DispZ, Meta);
 	cChunk * DispChunk = a_Chunk.GetRelNeighborChunkAdjustCoords(DispX, DispZ);
-	if (DispChunk == NULL)
+	if (DispChunk == nullptr)
 	{
 		// Would dispense into / interact with a non-loaded chunk, ignore the tick
 		return;
@@ -190,7 +190,7 @@ void cDispenserEntity::DropSpenseFromSlot(cChunk & a_Chunk, int a_SlotNum)
 
 void cDispenserEntity::SpawnProjectileFromDispenser(int a_BlockX, int a_BlockY, int a_BlockZ, cProjectileEntity::eKind a_Kind, const Vector3d & a_ShootVector)
 {
-	m_World->CreateProjectile(static_cast<double>(a_BlockX + 0.5), static_cast<double>(a_BlockY + 0.5), static_cast<double>(a_BlockZ + 0.5), a_Kind, NULL, NULL, &a_ShootVector);
+	m_World->CreateProjectile(static_cast<double>(a_BlockX + 0.5), static_cast<double>(a_BlockY + 0.5), static_cast<double>(a_BlockZ + 0.5), a_Kind, nullptr, nullptr, &a_ShootVector);
 }
 
 
diff --git a/src/BlockEntities/DropSpenserEntity.cpp b/src/BlockEntities/DropSpenserEntity.cpp
index e39b938a0..3f98836e7 100644
--- a/src/BlockEntities/DropSpenserEntity.cpp
+++ b/src/BlockEntities/DropSpenserEntity.cpp
@@ -28,7 +28,7 @@ cDropSpenserEntity::~cDropSpenserEntity()
 {
 	// Tell window its owner is destroyed
 	cWindow * Window = GetWindow();
-	if (Window != NULL)
+	if (Window != nullptr)
 	{
 		Window->OwnerDestroyed();
 	}
@@ -70,19 +70,19 @@ void cDropSpenserEntity::DropSpense(cChunk & a_Chunk)
 			SlotsCnt++;
 		}
 	}  // for i - m_Contents[]
-
+	
 	if (SlotsCnt == 0)
 	{
 		// Nothing in the dropspenser, play the click sound
 		m_World->BroadcastSoundEffect("random.click", m_PosX * 8, m_PosY * 8, m_PosZ * 8, 1.0f, 1.2f);
 		return;
 	}
-
+	
 	int RandomSlot = 	m_World->GetTickRandomNumber(SlotsCnt - 1);
-
+	
 	// DropSpense the item, using the specialized behavior in the subclasses:
 	DropSpenseFromSlot(a_Chunk, OccupiedSlots[RandomSlot]);
-
+	
 	// Broadcast a smoke and click effects:
 	NIBBLETYPE Meta = a_Chunk.GetMeta(m_RelX, m_PosY, m_RelZ);
 	int SmokeDir = 0;
@@ -132,7 +132,7 @@ bool cDropSpenserEntity::Tick(float a_Dt, cChunk & a_Chunk)
 	{
 		return false;
 	}
-
+	
 	m_ShouldDropSpense = false;
 	DropSpense(a_Chunk);
 	return true;
@@ -155,13 +155,13 @@ void cDropSpenserEntity::SendTo(cClientHandle & a_Client)
 void cDropSpenserEntity::UsedBy(cPlayer * a_Player)
 {
 	cWindow * Window = GetWindow();
-	if (Window == NULL)
+	if (Window == nullptr)
 	{
 		OpenWindow(new cDropSpenserWindow(m_PosX, m_PosY, m_PosZ, this));
 		Window = GetWindow();
 	}
-
-	if (Window != NULL)
+	
+	if (Window != nullptr)
 	{
 		if (a_Player->GetWindow() != Window)
 		{
@@ -205,3 +205,7 @@ void cDropSpenserEntity::DropFromSlot(cChunk & a_Chunk, int a_SlotNum)
 
 	m_World->SpawnItemPickups(Pickups, MicroX, MicroY, MicroZ, PickupSpeedX, PickupSpeedY, PickupSpeedZ);
 }
+
+
+
+
diff --git a/src/BlockEntities/EnderChestEntity.cpp b/src/BlockEntities/EnderChestEntity.cpp
index 0654d97dd..e18490a1e 100644
--- a/src/BlockEntities/EnderChestEntity.cpp
+++ b/src/BlockEntities/EnderChestEntity.cpp
@@ -23,7 +23,7 @@ cEnderChestEntity::cEnderChestEntity(int a_BlockX, int a_BlockY, int a_BlockZ, c
 cEnderChestEntity::~cEnderChestEntity()
 {
 	cWindow * Window = GetWindow();
-	if (Window != NULL)
+	if (Window != nullptr)
 	{
 		Window->OwnerDestroyed();
 	}
@@ -37,14 +37,14 @@ void cEnderChestEntity::UsedBy(cPlayer * a_Player)
 {
 	// If the window is not created, open it anew:
 	cWindow * Window = GetWindow();
-	if (Window == NULL)
+	if (Window == nullptr)
 	{
 		OpenNewWindow();
 		Window = GetWindow();
 	}
 	
 	// Open the window for the player:
-	if (Window != NULL)
+	if (Window != nullptr)
 	{
 		if (a_Player->GetWindow() != Window)
 		{
diff --git a/src/BlockEntities/FlowerPotEntity.cpp b/src/BlockEntities/FlowerPotEntity.cpp
index ad7b496cc..64b7edd02 100644
--- a/src/BlockEntities/FlowerPotEntity.cpp
+++ b/src/BlockEntities/FlowerPotEntity.cpp
@@ -59,7 +59,7 @@ void cFlowerPotEntity::Destroy(void)
 	// Drop the contents as pickups:
 	if (!m_Item.IsEmpty())
 	{
-		ASSERT(m_World != NULL);
+		ASSERT(m_World != nullptr);
 		cItems Pickups;
 		Pickups.Add(m_Item);
 		m_World->SpawnItemPickups(Pickups, m_PosX + 0.5, m_PosY + 0.5, m_PosZ + 0.5);
diff --git a/src/BlockEntities/FlowerPotEntity.h b/src/BlockEntities/FlowerPotEntity.h
index 5b86621f5..fc886c51f 100644
--- a/src/BlockEntities/FlowerPotEntity.h
+++ b/src/BlockEntities/FlowerPotEntity.h
@@ -38,7 +38,7 @@ public:
 	
 	BLOCKENTITY_PROTODEF(cFlowerPotEntity);
 	
-	/** Creates a new flowerpot entity at the specified block coords. a_World may be NULL */
+	/** Creates a new flowerpot entity at the specified block coords. a_World may be nullptr */
 	cFlowerPotEntity(int a_BlocX, int a_BlockY, int a_BlockZ, cWorld * a_World);
 	
 	virtual void Destroy(void) override;
diff --git a/src/BlockEntities/FurnaceEntity.cpp b/src/BlockEntities/FurnaceEntity.cpp
index ac71f1541..d2ec2bd1e 100644
--- a/src/BlockEntities/FurnaceEntity.cpp
+++ b/src/BlockEntities/FurnaceEntity.cpp
@@ -26,7 +26,7 @@ enum
 cFurnaceEntity::cFurnaceEntity(int a_BlockX, int a_BlockY, int a_BlockZ, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta, cWorld * a_World) :
 	super(a_BlockType, a_BlockX, a_BlockY, a_BlockZ, ContentsWidth, ContentsHeight, a_World),
 	m_BlockMeta(a_BlockMeta),
-	m_CurrentRecipe(NULL),
+	m_CurrentRecipe(nullptr),
 	m_IsDestroyed(false),
 	m_IsCooking(a_BlockType == E_BLOCK_LIT_FURNACE),
 	m_NeedCookTime(0),
@@ -45,7 +45,7 @@ cFurnaceEntity::~cFurnaceEntity()
 {
 	// Tell window its owner is destroyed
 	cWindow * Window = GetWindow();
-	if (Window != NULL)
+	if (Window != nullptr)
 	{
 		Window->OwnerDestroyed();
 	}
@@ -145,7 +145,7 @@ void cFurnaceEntity::SendTo(cClientHandle & a_Client)
 void cFurnaceEntity::BroadcastProgress(short a_ProgressbarID, short a_Value)
 {
 	cWindow * Window = GetWindow();
-	if (Window != NULL)
+	if (Window != nullptr)
 	{
 		Window->SetProperty(a_ProgressbarID, a_Value);
 	}
@@ -306,7 +306,7 @@ void cFurnaceEntity::UpdateOutput(void)
 
 bool cFurnaceEntity::CanCookInputToOutput(void) const
 {
-	if (m_CurrentRecipe == NULL)
+	if (m_CurrentRecipe == nullptr)
 	{
 		// This input cannot be cooked
 		return false;
diff --git a/src/BlockEntities/HopperEntity.cpp b/src/BlockEntities/HopperEntity.cpp
index 9f64ea148..fe3fb85c4 100644
--- a/src/BlockEntities/HopperEntity.cpp
+++ b/src/BlockEntities/HopperEntity.cpp
@@ -86,14 +86,14 @@ void cHopperEntity::UsedBy(cPlayer * a_Player)
 {
 	// If the window is not created, open it anew:
 	cWindow * Window = GetWindow();
-	if (Window == NULL)
+	if (Window == nullptr)
 	{
 		OpenNewWindow();
 		Window = GetWindow();
 	}
 
 	// Open the window for the player:
-	if (Window != NULL)
+	if (Window != nullptr)
 	{
 		if (a_Player->GetWindow() != Window)
 		{
@@ -197,7 +197,7 @@ bool cHopperEntity::MovePickupsIn(cChunk & a_Chunk, Int64 a_CurrentTick)
 
 		virtual bool Item(cEntity * a_Entity) override
 		{
-			ASSERT(a_Entity != NULL);
+			ASSERT(a_Entity != nullptr);
 
 			if (!a_Entity->IsPickup() || a_Entity->IsDestroyed())
 			{
@@ -299,7 +299,7 @@ bool cHopperEntity::MoveItemsOut(cChunk & a_Chunk, Int64 a_CurrentTick)
 	int OutRelX = OutX - a_Chunk.GetPosX() * cChunkDef::Width;
 	int OutRelZ = OutZ - a_Chunk.GetPosZ() * cChunkDef::Width;
 	cChunk * DestChunk = a_Chunk.GetRelNeighborChunkAdjustCoords(OutRelX, OutRelZ);
-	if (DestChunk == NULL)
+	if (DestChunk == nullptr)
 	{
 		// The destination chunk has been unloaded, don't tick
 		return false;
@@ -328,7 +328,7 @@ bool cHopperEntity::MoveItemsOut(cChunk & a_Chunk, Int64 a_CurrentTick)
 		case E_BLOCK_HOPPER:
 		{
 			cBlockEntityWithItems * BlockEntity = static_cast<cBlockEntityWithItems *>(DestChunk->GetBlockEntity(OutX, OutY, OutZ));
-			if (BlockEntity == NULL)
+			if (BlockEntity == nullptr)
 			{
 				LOGWARNING("%s: A block entity was not found where expected at {%d, %d, %d}", __FUNCTION__, OutX, OutY, OutZ);
 				return false;
@@ -355,7 +355,7 @@ bool cHopperEntity::MoveItemsOut(cChunk & a_Chunk, Int64 a_CurrentTick)
 bool cHopperEntity::MoveItemsFromChest(cChunk & a_Chunk)
 {
 	cChestEntity * MainChest = static_cast<cChestEntity *>(a_Chunk.GetBlockEntity(m_PosX, m_PosY + 1, m_PosZ));
-	if (MainChest == NULL)
+	if (MainChest == nullptr)
 	{
 		LOGWARNING("%s: A chest entity was not found where expected, at {%d, %d, %d}", __FUNCTION__, m_PosX, m_PosY + 1, m_PosZ);
 		return false;
@@ -383,7 +383,7 @@ bool cHopperEntity::MoveItemsFromChest(cChunk & a_Chunk)
 		int x = m_RelX + Coords[i].x;
 		int z = m_RelZ + Coords[i].z;
 		cChunk * Neighbor = a_Chunk.GetRelNeighborChunkAdjustCoords(x, z);
-		if (Neighbor == NULL)
+		if (Neighbor == nullptr)
 		{
 			continue;
 		}
@@ -396,7 +396,7 @@ bool cHopperEntity::MoveItemsFromChest(cChunk & a_Chunk)
 		}
 
 		cChestEntity * SideChest = static_cast<cChestEntity *>(Neighbor->GetBlockEntity(m_PosX + Coords[i].x, m_PosY + 1, m_PosZ + Coords[i].z));
-		if (SideChest == NULL)
+		if (SideChest == nullptr)
 		{
 			LOGWARNING("%s: A chest entity was not found where expected, at {%d, %d, %d}", __FUNCTION__, m_PosX + Coords[i].x, m_PosY + 1, m_PosZ + Coords[i].z);
 		}
@@ -422,7 +422,7 @@ bool cHopperEntity::MoveItemsFromChest(cChunk & a_Chunk)
 bool cHopperEntity::MoveItemsFromFurnace(cChunk & a_Chunk)
 {
 	cFurnaceEntity * Furnace = static_cast<cFurnaceEntity *>(a_Chunk.GetBlockEntity(m_PosX, m_PosY + 1, m_PosZ));
-	if (Furnace == NULL)
+	if (Furnace == nullptr)
 	{
 		LOGWARNING("%s: A furnace entity was not found where expected, at {%d, %d, %d}", __FUNCTION__, m_PosX, m_PosY + 1, m_PosZ);
 		return false;
@@ -536,7 +536,7 @@ bool cHopperEntity::MoveItemsToChest(cChunk & a_Chunk, int a_BlockX, int a_Block
 {
 	// Try the chest directly connected to the hopper:
 	cChestEntity * ConnectedChest = static_cast<cChestEntity *>(a_Chunk.GetBlockEntity(a_BlockX, a_BlockY, a_BlockZ));
-	if (ConnectedChest == NULL)
+	if (ConnectedChest == nullptr)
 	{
 		LOGWARNING("%s: A chest entity was not found where expected, at {%d, %d, %d}", __FUNCTION__, a_BlockX, a_BlockY, a_BlockZ);
 		return false;
@@ -566,7 +566,7 @@ bool cHopperEntity::MoveItemsToChest(cChunk & a_Chunk, int a_BlockX, int a_Block
 		int x = RelX + Coords[i].x;
 		int z = RelZ + Coords[i].z;
 		cChunk * Neighbor = a_Chunk.GetRelNeighborChunkAdjustCoords(x, z);
-		if (Neighbor == NULL)
+		if (Neighbor == nullptr)
 		{
 			continue;
 		}
@@ -579,7 +579,7 @@ bool cHopperEntity::MoveItemsToChest(cChunk & a_Chunk, int a_BlockX, int a_Block
 		}
 
 		cChestEntity * Chest = static_cast<cChestEntity *>(Neighbor->GetBlockEntity(a_BlockX + Coords[i].x, a_BlockY, a_BlockZ + Coords[i].z));
-		if (Chest == NULL)
+		if (Chest == nullptr)
 		{
 			LOGWARNING("%s: A chest entity was not found where expected, at {%d, %d, %d} (%d, %d)", __FUNCTION__, a_BlockX + Coords[i].x, a_BlockY, a_BlockZ + Coords[i].z, x, z);
 			continue;
diff --git a/src/BlockEntities/MobHeadEntity.h b/src/BlockEntities/MobHeadEntity.h
index 7f69bc5ad..7132ef558 100644
--- a/src/BlockEntities/MobHeadEntity.h
+++ b/src/BlockEntities/MobHeadEntity.h
@@ -36,7 +36,7 @@ public:
 	
 	BLOCKENTITY_PROTODEF(cMobHeadEntity);
 	
-	/** Creates a new mob head entity at the specified block coords. a_World may be NULL */
+	/** Creates a new mob head entity at the specified block coords. a_World may be nullptr */
 	cMobHeadEntity(int a_BlockX, int a_BlockY, int a_BlockZ, cWorld * a_World);
 
 	// tolua_begin
diff --git a/src/BlockEntities/NoteEntity.h b/src/BlockEntities/NoteEntity.h
index 74dbde046..fc5f27d07 100644
--- a/src/BlockEntities/NoteEntity.h
+++ b/src/BlockEntities/NoteEntity.h
@@ -42,7 +42,7 @@ public:
 
 	BLOCKENTITY_PROTODEF(cNoteEntity);
 	
-	/// Creates a new note entity. a_World may be NULL
+	/// Creates a new note entity. a_World may be nullptr
 	cNoteEntity(int a_X, int a_Y, int a_Z, cWorld * a_World);
 	virtual ~cNoteEntity() {}
 
diff --git a/src/BlockEntities/SignEntity.h b/src/BlockEntities/SignEntity.h
index be13c7a32..52baa486d 100644
--- a/src/BlockEntities/SignEntity.h
+++ b/src/BlockEntities/SignEntity.h
@@ -36,7 +36,7 @@ public:
 	
 	BLOCKENTITY_PROTODEF(cSignEntity);
 	
-	/// Creates a new empty sign entity at the specified block coords and block type (wall or standing). a_World may be NULL
+	/// Creates a new empty sign entity at the specified block coords and block type (wall or standing). a_World may be nullptr
 	cSignEntity(BLOCKTYPE a_BlockType, int a_X, int a_Y, int a_Z, cWorld * a_World);
 
 	// tolua_begin
diff --git a/src/BlockInfo.cpp b/src/BlockInfo.cpp
index bdd3a9c26..bcab21e77 100644
--- a/src/BlockInfo.cpp
+++ b/src/BlockInfo.cpp
@@ -9,7 +9,7 @@
 cBlockInfo::~cBlockInfo()
 {
 	delete m_Handler;
-	m_Handler = NULL;
+	m_Handler = nullptr;
 }
 
 
@@ -17,7 +17,7 @@ void cBlockInfo::Initialize(cBlockInfoArray & a_Info)
 {
 	for (unsigned int i = 0; i < 256; ++i)
 	{
-		if (a_Info[i].m_Handler == NULL)
+		if (a_Info[i].m_Handler == nullptr)
 		{
 			a_Info[i].m_Handler = cBlockHandler::CreateBlockHandler((BLOCKTYPE) i);
 		}
diff --git a/src/BlockInfo.h b/src/BlockInfo.h
index 1e4cf2ca0..4709f2357 100644
--- a/src/BlockInfo.h
+++ b/src/BlockInfo.h
@@ -102,7 +102,7 @@ protected:
 		, m_FullyOccupiesVoxel(false)
 		, m_CanBeTerraformed(false)
 		, m_PlaceSound("")
-		, m_Handler(NULL)
+		, m_Handler(nullptr)
 	{}
 
 	/** Cleans up the stored values */
diff --git a/src/Blocks/BlockDirt.h b/src/Blocks/BlockDirt.h
index 89dfc963d..aae6719e2 100644
--- a/src/Blocks/BlockDirt.h
+++ b/src/Blocks/BlockDirt.h
@@ -72,7 +72,7 @@ public:
 			int BlockY = a_RelY + OfsY;
 			int BlockZ = a_RelZ + OfsZ;
 			cChunk * Chunk = a_Chunk.GetRelNeighborChunkAdjustCoords(BlockX, BlockZ);
-			if (Chunk == NULL)
+			if (Chunk == nullptr)
 			{
 				// Unloaded chunk
 				continue;
diff --git a/src/Blocks/BlockHandler.cpp b/src/Blocks/BlockHandler.cpp
index b6ef5dd6f..60f13a747 100644
--- a/src/Blocks/BlockHandler.cpp
+++ b/src/Blocks/BlockHandler.cpp
@@ -99,9 +99,9 @@ public:
 		for (BLOCKTYPE Type = 0; Type < E_BLOCK_MAX_TYPE_ID; Type++)
 		{
 			cBlockHandler * Handler = cBlockInfo::GetHandler(Type);
-			if (Handler == NULL)
+			if (Handler == nullptr)
 			{
-				printf("NULL handler for block type %d!\n", Type);
+				printf("nullptr handler for block type %d!\n", Type);
 				continue;
 			}
 			AString BlockName = ItemTypeToString(Type);
@@ -441,7 +441,7 @@ void cBlockHandler::DropBlock(cChunkInterface & a_ChunkInterface, cWorldInterfac
 
 	if (a_CanDrop)
 	{
-		if ((a_Digger != NULL) && (a_Digger->GetEquippedWeapon().m_Enchantments.GetLevel(cEnchantments::enchSilkTouch) > 0))
+		if ((a_Digger != nullptr) && (a_Digger->GetEquippedWeapon().m_Enchantments.GetLevel(cEnchantments::enchSilkTouch) > 0))
 		{
 			switch (m_BlockType)
 			{
@@ -562,7 +562,7 @@ void cBlockHandler::Check(cChunkInterface & a_ChunkInterface, cBlockPluginInterf
 		{
 			int BlockX = a_RelX + a_Chunk.GetPosX() * cChunkDef::Width;
 			int BlockZ = a_RelZ + a_Chunk.GetPosZ() * cChunkDef::Width;
-			DropBlock(a_ChunkInterface, *a_Chunk.GetWorld(), a_PluginInterface, NULL, BlockX, a_RelY, BlockZ);
+			DropBlock(a_ChunkInterface, *a_Chunk.GetWorld(), a_PluginInterface, nullptr, BlockX, a_RelY, BlockZ);
 		}
 		
 		a_Chunk.SetBlock(a_RelX, a_RelY, a_RelZ, E_BLOCK_AIR, 0);
diff --git a/src/Blocks/BlockHandler.h b/src/Blocks/BlockHandler.h
index 83de836cb..f2298afb5 100644
--- a/src/Blocks/BlockHandler.h
+++ b/src/Blocks/BlockHandler.h
@@ -78,7 +78,7 @@ public:
 	virtual void ConvertToPickups(cItems & a_Pickups, NIBBLETYPE a_BlockMeta);
 	
 	/** Handles the dropping, but not destruction, of a block based on what ConvertTo(Verbatim)Pickups() returns, including the spawning of pickups and alertion of plugins
-	@param a_Digger The entity causing the drop; it may be NULL
+	@param a_Digger The entity causing the drop; it may be nullptr
 	@param a_CanDrop Informs the handler whether the block should be dropped at all. One example when this is false is when stone is destroyed by hand
 	@param a_DropVerbatim Calls ConvertToVerbatimPickups() instead of its counterpart, meaning the block itself is dropped by default (due to a speical tool or enchantment)
 	*/
diff --git a/src/Blocks/BlockLeaves.h b/src/Blocks/BlockLeaves.h
index add571675..bd9a7414e 100644
--- a/src/Blocks/BlockLeaves.h
+++ b/src/Blocks/BlockLeaves.h
@@ -109,7 +109,7 @@ public:
 		}
 
 		// Decay the leaves:
-		DropBlock(a_ChunkInterface, a_WorldInterface, a_PluginInterface, NULL, BlockX, a_RelY, BlockZ);
+		DropBlock(a_ChunkInterface, a_WorldInterface, a_PluginInterface, nullptr, BlockX, a_RelY, BlockZ);
 		a_ChunkInterface.DigBlock(a_WorldInterface, BlockX, a_RelY, BlockZ);
 	}
 } ;
diff --git a/src/Blocks/BlockPiston.cpp b/src/Blocks/BlockPiston.cpp
index 34d11f675..8d245cabe 100644
--- a/src/Blocks/BlockPiston.cpp
+++ b/src/Blocks/BlockPiston.cpp
@@ -139,7 +139,7 @@ void cBlockPistonHandler::ExtendPiston(int a_BlockX, int a_BlockY, int a_BlockZ,
 		{
 			cChunkInterface ChunkInterface(a_World->GetChunkMap());
 			cBlockInServerPluginInterface PluginInterface(*a_World);
-			Handler->DropBlock(ChunkInterface, *a_World, PluginInterface, NULL, a_BlockX, a_BlockY, a_BlockZ);
+			Handler->DropBlock(ChunkInterface, *a_World, PluginInterface, nullptr, a_BlockX, a_BlockY, a_BlockZ);
 		}
 	}
 
diff --git a/src/Blocks/BlockVine.h b/src/Blocks/BlockVine.h
index ff34cdf87..00d7a69b8 100644
--- a/src/Blocks/BlockVine.h
+++ b/src/Blocks/BlockVine.h
@@ -148,7 +148,7 @@ public:
 				{
 					int BlockX = a_RelX + a_Chunk.GetPosX() * cChunkDef::Width;
 					int BlockZ = a_RelZ + a_Chunk.GetPosZ() * cChunkDef::Width;
-					DropBlock(a_ChunkInterface, *a_Chunk.GetWorld(), a_PluginInterface, NULL, BlockX, a_RelY, BlockZ);
+					DropBlock(a_ChunkInterface, *a_Chunk.GetWorld(), a_PluginInterface, nullptr, BlockX, a_RelY, BlockZ);
 				}
 				a_Chunk.SetBlock(a_RelX, a_RelY, a_RelZ, E_BLOCK_AIR, 0);
 				return;
diff --git a/src/Blocks/BroadcastInterface.h b/src/Blocks/BroadcastInterface.h
index cf332b153..bf464627d 100644
--- a/src/Blocks/BroadcastInterface.h
+++ b/src/Blocks/BroadcastInterface.h
@@ -7,6 +7,6 @@ public:
 	virtual ~cBroadcastInterface() {}
 	
 	virtual void BroadcastUseBed     (const cEntity & a_Entity, int a_BlockX, int a_BlockY, int a_BlockZ) = 0;
-	virtual void BroadcastSoundEffect(const AString & a_SoundName, double a_X, double a_Y, double a_Z, float a_Volume, float a_Pitch, const cClientHandle * a_Exclude = NULL) = 0;
-	virtual void BroadcastEntityAnimation(const cEntity & a_Entity, char a_Animation, const cClientHandle * a_Exclude = NULL) = 0;
+	virtual void BroadcastSoundEffect(const AString & a_SoundName, double a_X, double a_Y, double a_Z, float a_Volume, float a_Pitch, const cClientHandle * a_Exclude = nullptr) = 0;
+	virtual void BroadcastEntityAnimation(const cEntity & a_Entity, char a_Animation, const cClientHandle * a_Exclude = nullptr) = 0;
 };
diff --git a/src/ByteBuffer.cpp b/src/ByteBuffer.cpp
index dc6b32a44..012105ca1 100644
--- a/src/ByteBuffer.cpp
+++ b/src/ByteBuffer.cpp
@@ -165,7 +165,7 @@ cByteBuffer::~cByteBuffer()
 {
 	CheckValid();
 	delete[] m_Buffer;
-	m_Buffer = NULL;
+	m_Buffer = nullptr;
 }
 
 
diff --git a/src/Chunk.cpp b/src/Chunk.cpp
index 7d6d88b26..542b17255 100644
--- a/src/Chunk.cpp
+++ b/src/Chunk.cpp
@@ -95,19 +95,19 @@ cChunk::cChunk(
 	m_RedstoneSimulatorData(a_World->GetRedstoneSimulator()->CreateChunkData()),
 	m_AlwaysTicked(0)
 {
-	if (a_NeighborXM != NULL)
+	if (a_NeighborXM != nullptr)
 	{
 		a_NeighborXM->m_NeighborXP = this;
 	}
-	if (a_NeighborXP != NULL)
+	if (a_NeighborXP != nullptr)
 	{
 		a_NeighborXP->m_NeighborXM = this;
 	}
-	if (a_NeighborZM != NULL)
+	if (a_NeighborZM != nullptr)
 	{
 		a_NeighborZM->m_NeighborZP = this;
 	}
-	if (a_NeighborZP != NULL)
+	if (a_NeighborZP != nullptr)
 	{
 		a_NeighborZP->m_NeighborZM = this;
 	}
@@ -141,28 +141,28 @@ cChunk::~cChunk()
 		}
 	}
 	
-	if (m_NeighborXM != NULL)
+	if (m_NeighborXM != nullptr)
 	{
-		m_NeighborXM->m_NeighborXP = NULL;
+		m_NeighborXM->m_NeighborXP = nullptr;
 	}
-	if (m_NeighborXP != NULL)
+	if (m_NeighborXP != nullptr)
 	{
-		m_NeighborXP->m_NeighborXM = NULL;
+		m_NeighborXP->m_NeighborXM = nullptr;
 	}
-	if (m_NeighborZM != NULL)
+	if (m_NeighborZM != nullptr)
 	{
-		m_NeighborZM->m_NeighborZP = NULL;
+		m_NeighborZM->m_NeighborZP = nullptr;
 	}
-	if (m_NeighborZP != NULL)
+	if (m_NeighborZP != nullptr)
 	{
-		m_NeighborZP->m_NeighborZM = NULL;
+		m_NeighborZP->m_NeighborZM = nullptr;
 	}
 	delete m_WaterSimulatorData;
-	m_WaterSimulatorData = NULL;
+	m_WaterSimulatorData = nullptr;
 	delete m_LavaSimulatorData;
-	m_LavaSimulatorData = NULL;
+	m_LavaSimulatorData = nullptr;
 	delete m_RedstoneSimulatorData;
-	m_RedstoneSimulatorData = NULL;
+	m_RedstoneSimulatorData = nullptr;
 }
 
 
@@ -581,7 +581,7 @@ void cChunk::SpawnMobs(cMobSpawner& a_MobSpawner)
 		}
 		
 		cEntity * newMob = a_MobSpawner.TryToSpawnHere(this, TryX, TryY, TryZ, Biome, MaxNbOfSuccess);
-		if (newMob == NULL)
+		if (newMob == nullptr)
 		{
 			continue;
 		}
@@ -639,7 +639,7 @@ void cChunk::Tick(float a_Dt)
 		{
 			// Remove all entities that are travelling to another world
 			MarkDirty();
-			(*itr)->SetWorldTravellingFrom(NULL);
+			(*itr)->SetWorldTravellingFrom(nullptr);
 			itr = m_Entities.erase(itr);
 		}
 		else if (
@@ -668,7 +668,7 @@ void cChunk::Tick(float a_Dt)
 void cChunk::TickBlock(int a_RelX, int a_RelY, int a_RelZ)
 {
 	cBlockHandler * Handler = BlockHandler(GetBlock(a_RelX, a_RelY, a_RelZ));
-	ASSERT(Handler != NULL);  // Happenned on server restart, FS #243
+	ASSERT(Handler != nullptr);  // Happenned on server restart, FS #243
 	cChunkInterface ChunkInterface(this->GetWorld()->GetChunkMap());
 	cBlockInServerPluginInterface PluginInterface(*this->GetWorld());
 	Handler->OnUpdate(ChunkInterface, *this->GetWorld(), PluginInterface, *this, a_RelX, a_RelY, a_RelZ);
@@ -681,10 +681,10 @@ void cChunk::TickBlock(int a_RelX, int a_RelY, int a_RelZ)
 void cChunk::MoveEntityToNewChunk(cEntity * a_Entity)
 {
 	cChunk * Neighbor = GetNeighborChunk(a_Entity->GetChunkX() * cChunkDef::Width, a_Entity->GetChunkZ() * cChunkDef::Width);
-	if (Neighbor == NULL)
+	if (Neighbor == nullptr)
 	{
 		Neighbor = m_ChunkMap->GetChunkNoLoad(a_Entity->GetChunkX(), a_Entity->GetChunkZ());
-		if (Neighbor == NULL)
+		if (Neighbor == nullptr)
 		{
 			// TODO: What to do with this?
 			LOGWARNING("%s: Failed to move entity, destination chunk unreachable. Entity lost", __FUNCTION__);
@@ -847,7 +847,7 @@ void cChunk::TickBlocks(void)
 		}
 
 		cBlockHandler * Handler = BlockHandler(GetBlock(m_BlockTickX, m_BlockTickY, m_BlockTickZ));
-		ASSERT(Handler != NULL);  // Happenned on server restart, FS #243
+		ASSERT(Handler != nullptr);  // Happenned on server restart, FS #243
 		Handler->OnUpdate(ChunkInterface, *this->GetWorld(), PluginInterface, *this, m_BlockTickX, m_BlockTickY, m_BlockTickZ);
 	}  // for i - tickblocks
 }
@@ -1127,7 +1127,7 @@ bool cChunk::UnboundedRelGetBlock(int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE
 		return false;
 	}
 	cChunk * Chunk = GetRelNeighborChunkAdjustCoords(a_RelX, a_RelZ);
-	if ((Chunk == NULL) || !Chunk->IsValid())
+	if ((Chunk == nullptr) || !Chunk->IsValid())
 	{
 		// The chunk is not available, bail out
 		return false;
@@ -1148,7 +1148,7 @@ bool cChunk::UnboundedRelGetBlockType(int a_RelX, int a_RelY, int a_RelZ, BLOCKT
 		return false;
 	}
 	cChunk * Chunk = GetRelNeighborChunkAdjustCoords(a_RelX, a_RelZ);
-	if ((Chunk == NULL) || !Chunk->IsValid())
+	if ((Chunk == nullptr) || !Chunk->IsValid())
 	{
 		// The chunk is not available, bail out
 		return false;
@@ -1169,7 +1169,7 @@ bool cChunk::UnboundedRelGetBlockMeta(int a_RelX, int a_RelY, int a_RelZ, NIBBLE
 		return false;
 	}
 	cChunk * Chunk = GetRelNeighborChunkAdjustCoords(a_RelX, a_RelZ);
-	if ((Chunk == NULL) || !Chunk->IsValid())
+	if ((Chunk == nullptr) || !Chunk->IsValid())
 	{
 		// The chunk is not available, bail out
 		return false;
@@ -1190,7 +1190,7 @@ bool cChunk::UnboundedRelGetBlockBlockLight(int a_RelX, int a_RelY, int a_RelZ,
 		return false;
 	}
 	cChunk * Chunk = GetRelNeighborChunkAdjustCoords(a_RelX, a_RelZ);
-	if ((Chunk == NULL) || !Chunk->IsValid())
+	if ((Chunk == nullptr) || !Chunk->IsValid())
 	{
 		// The chunk is not available, bail out
 		return false;
@@ -1211,7 +1211,7 @@ bool cChunk::UnboundedRelGetBlockSkyLight(int a_RelX, int a_RelY, int a_RelZ, NI
 		return false;
 	}
 	cChunk * Chunk = GetRelNeighborChunkAdjustCoords(a_RelX, a_RelZ);
-	if ((Chunk == NULL) || !Chunk->IsValid())
+	if ((Chunk == nullptr) || !Chunk->IsValid())
 	{
 		// The chunk is not available, bail out
 		return false;
@@ -1232,7 +1232,7 @@ bool cChunk::UnboundedRelGetBlockLights(int a_RelX, int a_RelY, int a_RelZ, NIBB
 		return false;
 	}
 	cChunk * Chunk = GetRelNeighborChunkAdjustCoords(a_RelX, a_RelZ);
-	if ((Chunk == NULL) || !Chunk->IsValid())
+	if ((Chunk == nullptr) || !Chunk->IsValid())
 	{
 		// The chunk is not available, bail out
 		return false;
@@ -1254,7 +1254,7 @@ bool cChunk::UnboundedRelSetBlock(int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE
 		return false;
 	}
 	cChunk * Chunk = GetRelNeighborChunkAdjustCoords(a_RelX, a_RelZ);
-	if ((Chunk == NULL) || !Chunk->IsValid())
+	if ((Chunk == nullptr) || !Chunk->IsValid())
 	{
 		// The chunk is not available, bail out
 		return false;
@@ -1275,7 +1275,7 @@ bool cChunk::UnboundedRelFastSetBlock(int a_RelX, int a_RelY, int a_RelZ, BLOCKT
 		return false;
 	}
 	cChunk * Chunk = GetRelNeighborChunkAdjustCoords(a_RelX, a_RelZ);
-	if ((Chunk == NULL) || !Chunk->IsValid())
+	if ((Chunk == nullptr) || !Chunk->IsValid())
 	{
 		// The chunk is not available, bail out
 		return false;
@@ -1296,7 +1296,7 @@ void cChunk::UnboundedQueueTickBlock(int a_RelX, int a_RelY, int a_RelZ)
 		return;
 	}
 	cChunk * Chunk = GetRelNeighborChunkAdjustCoords(a_RelX, a_RelZ);
-	if ((Chunk != NULL) && Chunk->IsValid())
+	if ((Chunk != nullptr) && Chunk->IsValid())
 	{
 		Chunk->QueueTickBlock(a_RelX, a_RelY, a_RelZ);
 	}
@@ -1452,12 +1452,12 @@ void cChunk::SetBlock(int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE a_BlockType,
 	// If there was a block entity, remove it:
 	Vector3i WorldPos = PositionToWorldPosition(a_RelX, a_RelY, a_RelZ);
 	cBlockEntity * BlockEntity = GetBlockEntity(WorldPos);
-	if (BlockEntity != NULL)
+	if (BlockEntity != nullptr)
 	{
 		BlockEntity->Destroy();
 		RemoveBlockEntity(BlockEntity);
 		delete BlockEntity;
-		BlockEntity = NULL;
+		BlockEntity = nullptr;
 	}
 	
 	// If the new block is a block entity, create the entity object:
@@ -1619,7 +1619,7 @@ void cChunk::FastSetBlock(int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE a_BlockT
 void cChunk::SendBlockTo(int a_RelX, int a_RelY, int a_RelZ, cClientHandle * a_Client)
 {
 
-	if (a_Client == NULL)
+	if (a_Client == nullptr)
 	{
 		// Queue the block for all clients in the chunk (will be sent in Tick())
 		m_PendingSendBlocks.push_back(sSetBlock(m_PosX, m_PosZ, a_RelX, a_RelY, a_RelZ, GetBlock(a_RelX, a_RelY, a_RelZ), GetMeta(a_RelX, a_RelY, a_RelZ)));
@@ -1673,7 +1673,7 @@ cBlockEntity * cChunk::GetBlockEntity(int a_BlockX, int a_BlockY, int a_BlockZ)
 		}
 	}  // for itr - m_BlockEntities[]
 	
-	return NULL;
+	return nullptr;
 }
 
 
@@ -1708,7 +1708,7 @@ void cChunk::SetAlwaysTicked(bool a_AlwaysTicked)
 void cChunk::UseBlockEntity(cPlayer * a_Player, int a_X, int a_Y, int a_Z)
 {
 	cBlockEntity * be = GetBlockEntity(a_X, a_Y, a_Z);
-	if (be != NULL)
+	if (be != nullptr)
 	{
 		be->UsedBy(a_Player);
 	}
@@ -2664,10 +2664,10 @@ cChunk * cChunk::GetRelNeighborChunk(int a_RelX, int a_RelZ)
 	bool ReturnThis = true;
 	if (a_RelX < 0)
 	{
-		if (m_NeighborXM != NULL)
+		if (m_NeighborXM != nullptr)
 		{
 			cChunk * Candidate = m_NeighborXM->GetRelNeighborChunk(a_RelX + cChunkDef::Width, a_RelZ);
-			if (Candidate != NULL)
+			if (Candidate != nullptr)
 			{
 				return Candidate;
 			}
@@ -2677,10 +2677,10 @@ cChunk * cChunk::GetRelNeighborChunk(int a_RelX, int a_RelZ)
 	}
 	else if (a_RelX >= cChunkDef::Width)
 	{
-		if (m_NeighborXP != NULL)
+		if (m_NeighborXP != nullptr)
 		{
 			cChunk * Candidate = m_NeighborXP->GetRelNeighborChunk(a_RelX - cChunkDef::Width, a_RelZ);
-			if (Candidate != NULL)
+			if (Candidate != nullptr)
 			{
 				return Candidate;
 			}
@@ -2691,24 +2691,24 @@ cChunk * cChunk::GetRelNeighborChunk(int a_RelX, int a_RelZ)
 	
 	if (a_RelZ < 0)
 	{
-		if (m_NeighborZM != NULL)
+		if (m_NeighborZM != nullptr)
 		{
 			return m_NeighborZM->GetRelNeighborChunk(a_RelX, a_RelZ + cChunkDef::Width);
 			// For requests crossing both X and Z, the X-first way has been already tried
 		}
-		return NULL;
+		return nullptr;
 	}
 	else if (a_RelZ >= cChunkDef::Width)
 	{
-		if (m_NeighborZP != NULL)
+		if (m_NeighborZP != nullptr)
 		{
 			return m_NeighborZP->GetRelNeighborChunk(a_RelX, a_RelZ - cChunkDef::Width);
 			// For requests crossing both X and Z, the X-first way has been already tried
 		}
-		return NULL;
+		return nullptr;
 	}
 	
-	return (ReturnThis ? this : NULL);
+	return (ReturnThis ? this : nullptr);
 }
 
 
@@ -2731,27 +2731,27 @@ cChunk * cChunk::GetRelNeighborChunkAdjustCoords(int & a_RelX, int & a_RelZ) con
 	// Request for a different chunk, calculate chunk offset:
 	int RelX = a_RelX;  // Make a local copy of the coords (faster access)
 	int RelZ = a_RelZ;
-	while ((RelX >= Width) && (ToReturn != NULL))
+	while ((RelX >= Width) && (ToReturn != nullptr))
 	{
 		RelX -= Width;
 		ToReturn = ToReturn->m_NeighborXP;
 	}
-	while ((RelX < 0) && (ToReturn != NULL))
+	while ((RelX < 0) && (ToReturn != nullptr))
 	{
 		RelX += Width;
 		ToReturn = ToReturn->m_NeighborXM;
 	}
-	while ((RelZ >= Width) && (ToReturn != NULL))
+	while ((RelZ >= Width) && (ToReturn != nullptr))
 	{
 		RelZ -= Width;
 		ToReturn = ToReturn->m_NeighborZP;
 	}
-	while ((RelZ < 0) && (ToReturn != NULL))
+	while ((RelZ < 0) && (ToReturn != nullptr))
 	{
 		RelZ += Width;
 		ToReturn = ToReturn->m_NeighborZM;
 	}
-	if (ToReturn != NULL)
+	if (ToReturn != nullptr)
 	{
 		a_RelX = RelX;
 		a_RelZ = RelZ;
@@ -2821,7 +2821,7 @@ void cChunk::BroadcastBlockEntity(int a_BlockX, int a_BlockY, int a_BlockZ, cons
 {
 	// We can operate on entity pointers, we're inside the ChunkMap's CS lock which guards the list
 	cBlockEntity * Entity = GetBlockEntity(a_BlockX, a_BlockY, a_BlockZ);
-	if (Entity == NULL)
+	if (Entity == nullptr)
 	{
 		return;
 	}
@@ -3158,7 +3158,7 @@ void cChunk::BroadcastUseBed(const cEntity & a_Entity, int a_BlockX, int a_Block
 void cChunk::SendBlockEntity(int a_BlockX, int a_BlockY, int a_BlockZ, cClientHandle & a_Client)
 {
 	cBlockEntity * Entity = GetBlockEntity(a_BlockX, a_BlockY, a_BlockZ);
-	if (Entity == NULL)
+	if (Entity == nullptr)
 	{
 		return;
 	}
diff --git a/src/Chunk.h b/src/Chunk.h
index 5f8fcaf7b..6f4ac5cac 100644
--- a/src/Chunk.h
+++ b/src/Chunk.h
@@ -190,13 +190,13 @@ public:
 	void      GetBlockInfo    (int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE & a_BlockType, NIBBLETYPE & a_Meta, NIBBLETYPE & a_SkyLight, NIBBLETYPE & a_BlockLight);
 	
 	/** Returns the chunk into which the specified block belongs, by walking the neighbors.
-	Will return self if appropriate. Returns NULL if not reachable through neighbors.
+	Will return self if appropriate. Returns nullptr if not reachable through neighbors.
 	*/
 	cChunk * GetNeighborChunk(int a_BlockX, int a_BlockZ);
 	
 	/**
 	Returns the chunk into which the relatively-specified block belongs, by walking the neighbors.
-	Will return self if appropriate. Returns NULL if not reachable through neighbors.
+	Will return self if appropriate. Returns nullptr if not reachable through neighbors.
 	*/
 	cChunk * GetRelNeighborChunk(int a_RelX, int a_RelZ);
 	
@@ -316,28 +316,28 @@ public:
 	// Broadcast various packets to all clients of this chunk:
 	// (Please keep these alpha-sorted)
 	void BroadcastAttachEntity       (const cEntity & a_Entity, const cEntity * a_Vehicle);
-	void BroadcastBlockAction        (int a_BlockX, int a_BlockY, int a_BlockZ, char a_Byte1, char a_Byte2, BLOCKTYPE a_BlockType, const cClientHandle * a_Exclude = NULL);
-	void BroadcastBlockBreakAnimation(int a_EntityID, int a_BlockX, int a_BlockY, int a_BlockZ, char a_Stage, const cClientHandle * a_Exclude = NULL);
-	void BroadcastBlockEntity        (int a_BlockX, int a_BlockY, int a_BlockZ, const cClientHandle * a_Exclude = NULL);
-	void BroadcastChunkData          (cChunkDataSerializer & a_Serializer, const cClientHandle * a_Exclude = NULL);
-	void BroadcastCollectEntity      (const cEntity & a_Entity, const cPlayer & a_Player, const cClientHandle * a_Exclude = NULL);
-	void BroadcastDestroyEntity      (const cEntity & a_Entity, const cClientHandle * a_Exclude = NULL);
-	void BroadcastEntityEffect       (const cEntity & a_Entity, int a_EffectID, int a_Amplifier, short a_Duration, const cClientHandle * a_Exclude = NULL);
-	void BroadcastEntityEquipment    (const cEntity & a_Entity, short a_SlotNum, const cItem & a_Item, const cClientHandle * a_Exclude = NULL);
-	void BroadcastEntityHeadLook     (const cEntity & a_Entity, const cClientHandle * a_Exclude = NULL);
-	void BroadcastEntityLook         (const cEntity & a_Entity, const cClientHandle * a_Exclude = NULL);
-	void BroadcastEntityMetadata     (const cEntity & a_Entity, const cClientHandle * a_Exclude = NULL);
-	void BroadcastEntityRelMove      (const cEntity & a_Entity, char a_RelX, char a_RelY, char a_RelZ, const cClientHandle * a_Exclude = NULL);
-	void BroadcastEntityRelMoveLook  (const cEntity & a_Entity, char a_RelX, char a_RelY, char a_RelZ, const cClientHandle * a_Exclude = NULL);
-	void BroadcastEntityStatus       (const cEntity & a_Entity, char a_Status, const cClientHandle * a_Exclude = NULL);
-	void BroadcastEntityVelocity     (const cEntity & a_Entity, const cClientHandle * a_Exclude = NULL);
-	void BroadcastEntityAnimation    (const cEntity & a_Entity, char a_Animation, const cClientHandle * a_Exclude = NULL);
-	void BroadcastParticleEffect     (const AString & a_ParticleName, float a_SrcX, float a_SrcY, float a_SrcZ, float a_OffsetX, float a_OffsetY, float a_OffsetZ, float a_ParticleData, int a_ParticleAmount, cClientHandle * a_Exclude = NULL);
-	void BroadcastRemoveEntityEffect (const cEntity & a_Entity, int a_EffectID, const cClientHandle * a_Exclude = NULL);
-	void BroadcastSoundEffect        (const AString & a_SoundName, double a_X, double a_Y, double a_Z, float a_Volume, float a_Pitch, const cClientHandle * a_Exclude = NULL);
-	void BroadcastSoundParticleEffect(int a_EffectID, int a_SrcX, int a_SrcY, int a_SrcZ, int a_Data, const cClientHandle * a_Exclude = NULL);
-	void BroadcastSpawnEntity        (cEntity & a_Entity, const cClientHandle * a_Exclude = NULL);
-	void BroadcastThunderbolt        (int a_BlockX, int a_BlockY, int a_BlockZ, const cClientHandle * a_Exclude = NULL);
+	void BroadcastBlockAction        (int a_BlockX, int a_BlockY, int a_BlockZ, char a_Byte1, char a_Byte2, BLOCKTYPE a_BlockType, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastBlockBreakAnimation(int a_EntityID, int a_BlockX, int a_BlockY, int a_BlockZ, char a_Stage, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastBlockEntity        (int a_BlockX, int a_BlockY, int a_BlockZ, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastChunkData          (cChunkDataSerializer & a_Serializer, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastCollectEntity      (const cEntity & a_Entity, const cPlayer & a_Player, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastDestroyEntity      (const cEntity & a_Entity, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastEntityEffect       (const cEntity & a_Entity, int a_EffectID, int a_Amplifier, short a_Duration, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastEntityEquipment    (const cEntity & a_Entity, short a_SlotNum, const cItem & a_Item, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastEntityHeadLook     (const cEntity & a_Entity, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastEntityLook         (const cEntity & a_Entity, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastEntityMetadata     (const cEntity & a_Entity, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastEntityRelMove      (const cEntity & a_Entity, char a_RelX, char a_RelY, char a_RelZ, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastEntityRelMoveLook  (const cEntity & a_Entity, char a_RelX, char a_RelY, char a_RelZ, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastEntityStatus       (const cEntity & a_Entity, char a_Status, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastEntityVelocity     (const cEntity & a_Entity, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastEntityAnimation    (const cEntity & a_Entity, char a_Animation, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastParticleEffect     (const AString & a_ParticleName, float a_SrcX, float a_SrcY, float a_SrcZ, float a_OffsetX, float a_OffsetY, float a_OffsetZ, float a_ParticleData, int a_ParticleAmount, cClientHandle * a_Exclude = nullptr);
+	void BroadcastRemoveEntityEffect (const cEntity & a_Entity, int a_EffectID, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastSoundEffect        (const AString & a_SoundName, double a_X, double a_Y, double a_Z, float a_Volume, float a_Pitch, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastSoundParticleEffect(int a_EffectID, int a_SrcX, int a_SrcY, int a_SrcZ, int a_Data, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastSpawnEntity        (cEntity & a_Entity, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastThunderbolt        (int a_BlockX, int a_BlockY, int a_BlockZ, const cClientHandle * a_Exclude = nullptr);
 	void BroadcastUseBed             (const cEntity & a_Entity, int a_BlockX, int a_BlockY, int a_BlockZ);
 	
 	void SendBlockEntity             (int a_BlockX, int a_BlockY, int a_BlockZ, cClientHandle & a_Client);
diff --git a/src/ChunkData.cpp b/src/ChunkData.cpp
index 03b0224a6..57b27c5e0 100644
--- a/src/ChunkData.cpp
+++ b/src/ChunkData.cpp
@@ -36,7 +36,7 @@ cChunkData::cChunkData(cAllocationPool<cChunkData::sChunkSection> & a_Pool) :
 {
 	for (size_t i = 0; i < NumSections; i++)
 	{
-		m_Sections[i] = NULL;
+		m_Sections[i] = nullptr;
 	}
 }
 
@@ -56,7 +56,7 @@ cChunkData::~cChunkData()
 	for (size_t i = 0; i < NumSections; i++)
 	{
 		Free(m_Sections[i]);
-		m_Sections[i] = NULL;
+		m_Sections[i] = nullptr;
 	}
 }
 
@@ -96,7 +96,7 @@ cChunkData::~cChunkData()
 			for (size_t i = 0; i < NumSections; i++)
 			{
 				Free(m_Sections[i]);
-				m_Sections[i] = NULL;
+				m_Sections[i] = nullptr;
 			}
 		}
 
@@ -120,7 +120,7 @@ cChunkData::~cChunkData()
 		for (size_t i = 0; i < NumSections; i++)
 		{
 			m_Sections[i] = other.m_Sections[i];
-			other.m_Sections[i] = NULL;
+			other.m_Sections[i] = nullptr;
 		}
 	}
 	
@@ -137,7 +137,7 @@ cChunkData::~cChunkData()
 			{
 				Free(m_Sections[i]);
 				m_Sections[i] = other.m_Sections[i];
-				other.m_Sections[i] = NULL;
+				other.m_Sections[i] = nullptr;
 			}
 		}
 		return *this;
@@ -154,7 +154,7 @@ BLOCKTYPE cChunkData::GetBlock(int a_X, int a_Y, int a_Z) const
 	ASSERT((a_Y >= 0) && (a_Y < cChunkDef::Height));
 	ASSERT((a_Z >= 0) && (a_Z < cChunkDef::Width));
 	int Section = a_Y / SectionHeight;
-	if (m_Sections[Section] != NULL)
+	if (m_Sections[Section] != nullptr)
 	{
 		int Index = cChunkDef::MakeIndexNoCheck(a_X, a_Y - (Section * SectionHeight), a_Z);
 		return m_Sections[Section]->m_BlockTypes[Index];
@@ -182,14 +182,14 @@ void cChunkData::SetBlock(int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE a_Block)
 	}
 
 	int Section = a_RelY / SectionHeight;
-	if (m_Sections[Section] == NULL)
+	if (m_Sections[Section] == nullptr)
 	{
 		if (a_Block == 0x00)
 		{
 			return;
 		}
 		m_Sections[Section] = Allocate();
-		if (m_Sections[Section] == NULL)
+		if (m_Sections[Section] == nullptr)
 		{
 			ASSERT(!"Failed to allocate a new section in Chunkbuffer");
 			return;
@@ -212,7 +212,7 @@ NIBBLETYPE cChunkData::GetMeta(int a_RelX, int a_RelY, int a_RelZ) const
 		(a_RelZ < cChunkDef::Width) && (a_RelZ > -1))
 	{
 		int Section = a_RelY / SectionHeight;
-		if (m_Sections[Section] != NULL)
+		if (m_Sections[Section] != nullptr)
 		{
 			int Index = cChunkDef::MakeIndexNoCheck(a_RelX, a_RelY - (Section * SectionHeight), a_RelZ);
 			return (m_Sections[Section]->m_BlockMetas[Index / 2] >> ((Index & 1) * 4)) & 0x0f;
@@ -243,14 +243,14 @@ bool cChunkData::SetMeta(int a_RelX, int a_RelY, int a_RelZ, NIBBLETYPE a_Nibble
 	}
 
 	int Section = a_RelY / SectionHeight;
-	if (m_Sections[Section] == NULL)
+	if (m_Sections[Section] == nullptr)
 	{
 		if ((a_Nibble & 0xf) == 0x00)
 		{
 			return false;
 		}
 		m_Sections[Section] = Allocate();
-		if (m_Sections[Section] == NULL)
+		if (m_Sections[Section] == nullptr)
 		{
 			ASSERT(!"Failed to allocate a new section in Chunkbuffer");
 			return false;
@@ -279,7 +279,7 @@ NIBBLETYPE cChunkData::GetBlockLight(int a_RelX, int a_RelY, int a_RelZ) const
 	)
 	{
 		int Section = a_RelY / SectionHeight;
-		if (m_Sections[Section] != NULL)
+		if (m_Sections[Section] != nullptr)
 		{
 			int Index = cChunkDef::MakeIndexNoCheck(a_RelX, a_RelY - (Section * SectionHeight), a_RelZ);
 			return (m_Sections[Section]->m_BlockLight[Index / 2] >> ((Index & 1) * 4)) & 0x0f;
@@ -302,7 +302,7 @@ NIBBLETYPE cChunkData::GetSkyLight(int a_RelX, int a_RelY, int a_RelZ) const
 	if ((a_RelX < cChunkDef::Width) && (a_RelX > -1) && (a_RelY < cChunkDef::Height) && (a_RelY > -1) && (a_RelZ < cChunkDef::Width) && (a_RelZ > -1))
 	{
 		int Section = a_RelY / SectionHeight;
-		if (m_Sections[Section] != NULL)
+		if (m_Sections[Section] != nullptr)
 		{
 			int Index = cChunkDef::MakeIndexNoCheck(a_RelX, a_RelY - (Section * SectionHeight), a_RelZ);
 			return (m_Sections[Section]->m_BlockSkyLight[Index / 2] >> ((Index & 1) * 4)) & 0x0f;
@@ -325,7 +325,7 @@ cChunkData cChunkData::Copy(void) const
 	cChunkData copy(m_Pool);
 	for (size_t i = 0; i < NumSections; i++)
 	{
-		if (m_Sections[i] != NULL)
+		if (m_Sections[i] != nullptr)
 		{
 			copy.m_Sections[i] = copy.Allocate();
 			*copy.m_Sections[i] = *m_Sections[i];
@@ -354,7 +354,7 @@ void cChunkData::CopyBlockTypes(BLOCKTYPE * a_Dest, size_t a_Idx, size_t a_Lengt
 		{
 			size_t ToCopy = std::min(+SectionBlockCount - StartPos, a_Length);
 			a_Length -= ToCopy;
-			if (m_Sections[i] != NULL)
+			if (m_Sections[i] != nullptr)
 			{
 				BLOCKTYPE * blockbuffer = m_Sections[i]->m_BlockTypes;
 				memcpy(&a_Dest[(i * SectionBlockCount) + StartPos - a_Idx], blockbuffer + StartPos, sizeof(BLOCKTYPE) * ToCopy);
@@ -375,7 +375,7 @@ void cChunkData::CopyMetas(NIBBLETYPE * a_Dest) const
 {
 	for (size_t i = 0; i < NumSections; i++)
 	{
-		if (m_Sections[i] != NULL)
+		if (m_Sections[i] != nullptr)
 		{
 			memcpy(&a_Dest[i * SectionBlockCount / 2], &m_Sections[i]->m_BlockMetas, sizeof(m_Sections[i]->m_BlockMetas));
 		}
@@ -394,7 +394,7 @@ void cChunkData::CopyBlockLight(NIBBLETYPE * a_Dest) const
 {
 	for (size_t i = 0; i < NumSections; i++)
 	{
-		if (m_Sections[i] != NULL)
+		if (m_Sections[i] != nullptr)
 		{
 			memcpy(&a_Dest[i * SectionBlockCount / 2], &m_Sections[i]->m_BlockLight, sizeof(m_Sections[i]->m_BlockLight));
 		}
@@ -413,7 +413,7 @@ void cChunkData::CopySkyLight(NIBBLETYPE * a_Dest) const
 {
 	for (size_t i = 0; i < NumSections; i++)
 	{
-		if (m_Sections[i] != NULL)
+		if (m_Sections[i] != nullptr)
 		{
 			memcpy(&a_Dest[i * SectionBlockCount / 2], &m_Sections[i]->m_BlockSkyLight, sizeof(m_Sections[i]->m_BlockSkyLight));
 		}
@@ -430,12 +430,12 @@ void cChunkData::CopySkyLight(NIBBLETYPE * a_Dest) const
 
 void cChunkData::SetBlockTypes(const BLOCKTYPE * a_Src)
 {
-	ASSERT(a_Src != NULL);
+	ASSERT(a_Src != nullptr);
 	
 	for (size_t i = 0; i < NumSections; i++)
 	{
 		// If the section is already allocated, copy the data into it:
-		if (m_Sections[i] != NULL)
+		if (m_Sections[i] != nullptr)
 		{
 			memcpy(m_Sections[i]->m_BlockTypes, &a_Src[i * SectionBlockCount], sizeof(m_Sections[i]->m_BlockTypes));
 			continue;
@@ -462,12 +462,12 @@ void cChunkData::SetBlockTypes(const BLOCKTYPE * a_Src)
 
 void cChunkData::SetMetas(const NIBBLETYPE * a_Src)
 {
-	ASSERT(a_Src != NULL);
+	ASSERT(a_Src != nullptr);
 	
 	for (size_t i = 0; i < NumSections; i++)
 	{
 		// If the section is already allocated, copy the data into it:
-		if (m_Sections[i] != NULL)
+		if (m_Sections[i] != nullptr)
 		{
 			memcpy(m_Sections[i]->m_BlockMetas, &a_Src[i * SectionBlockCount / 2], sizeof(m_Sections[i]->m_BlockMetas));
 			continue;
@@ -495,7 +495,7 @@ void cChunkData::SetMetas(const NIBBLETYPE * a_Src)
 
 void cChunkData::SetBlockLight(const NIBBLETYPE * a_Src)
 {
-	if (a_Src == NULL)
+	if (a_Src == nullptr)
 	{
 		return;
 	}
@@ -503,7 +503,7 @@ void cChunkData::SetBlockLight(const NIBBLETYPE * a_Src)
 	for (size_t i = 0; i < NumSections; i++)
 	{
 		// If the section is already allocated, copy the data into it:
-		if (m_Sections[i] != NULL)
+		if (m_Sections[i] != nullptr)
 		{
 			memcpy(m_Sections[i]->m_BlockLight, &a_Src[i * SectionBlockCount / 2], sizeof(m_Sections[i]->m_BlockLight));
 			continue;
@@ -530,7 +530,7 @@ void cChunkData::SetBlockLight(const NIBBLETYPE * a_Src)
 
 void cChunkData::SetSkyLight(const NIBBLETYPE * a_Src)
 {
-	if (a_Src == NULL)
+	if (a_Src == nullptr)
 	{
 		return;
 	}
@@ -538,7 +538,7 @@ void cChunkData::SetSkyLight(const NIBBLETYPE * a_Src)
 	for (size_t i = 0; i < NumSections; i++)
 	{
 		// If the section is already allocated, copy the data into it:
-		if (m_Sections[i] != NULL)
+		if (m_Sections[i] != nullptr)
 		{
 			memcpy(m_Sections[i]->m_BlockSkyLight, &a_Src[i * SectionBlockCount / 2], sizeof(m_Sections[i]->m_BlockSkyLight));
 			continue;
diff --git a/src/ChunkData.h b/src/ChunkData.h
index fe8b068a2..2ab629b29 100644
--- a/src/ChunkData.h
+++ b/src/ChunkData.h
@@ -88,12 +88,12 @@ public:
 
 	/** Copies the blocklight data from the specified flat array into the internal representation.
 	Allocates sectios that are needed for the operation.
-	Allows a_Src to be NULL, in which case it doesn't do anything. */
+	Allows a_Src to be nullptr, in which case it doesn't do anything. */
 	void SetBlockLight(const NIBBLETYPE * a_Src);
 
 	/** Copies the skylight data from the specified flat array into the internal representation.
 	Allocates sectios that are needed for the operation.
-	Allows a_Src to be NULL, in which case it doesn't do anything. */
+	Allows a_Src to be nullptr, in which case it doesn't do anything. */
 	void SetSkyLight(const NIBBLETYPE * a_Src);
 
 	struct sChunkSection
@@ -118,7 +118,7 @@ private:
 	sChunkSection * Allocate(void);
 
 	/** Frees the specified section, previously allocated using Allocate().
-	Note that a_Section may be NULL. */
+	Note that a_Section may be nullptr. */
 	void Free(sChunkSection * a_Section);
 	
 	/** Sets the data in the specified section to their default values. */
diff --git a/src/ChunkMap.cpp b/src/ChunkMap.cpp
index 6f56b23e0..595040a54 100644
--- a/src/ChunkMap.cpp
+++ b/src/ChunkMap.cpp
@@ -88,10 +88,10 @@ cChunkMap::cChunkLayer * cChunkMap::GetLayer(int a_LayerX, int a_LayerZ)
 	
 	// Not found, create new:
 	cChunkLayer * Layer = new cChunkLayer(a_LayerX, a_LayerZ, this, *m_Pool);
-	if (Layer == NULL)
+	if (Layer == nullptr)
 	{
 		LOGERROR("cChunkMap: Cannot create new layer, server out of memory?");
-		return NULL;
+		return nullptr;
 	}
 	m_Layers.push_back(Layer);
 	return Layer;
@@ -125,7 +125,7 @@ cChunkMap::cChunkLayer * cChunkMap::FindLayer(int a_LayerX, int a_LayerZ)
 	}  // for itr - m_Layers[]
 	
 	// Not found
-	return NULL;
+	return nullptr;
 }
 
 
@@ -148,16 +148,16 @@ cChunkPtr cChunkMap::GetChunk(int a_ChunkX, int a_ChunkZ)
 	ASSERT(m_CSLayers.IsLockedByCurrentThread());  // m_CSLayers should already be locked by the operation that called us
 
 	cChunkLayer * Layer = GetLayerForChunk(a_ChunkX, a_ChunkZ);
-	if (Layer == NULL)
+	if (Layer == nullptr)
 	{
 		// An error must have occurred, since layers are automatically created if they don't exist
-		return NULL;
+		return nullptr;
 	}
 	
 	cChunkPtr Chunk = Layer->GetChunk(a_ChunkX, a_ChunkZ);
-	if (Chunk == NULL)
+	if (Chunk == nullptr)
 	{
-		return NULL;
+		return nullptr;
 	}
 	if (!Chunk->IsValid() && !Chunk->IsQueued())
 	{
@@ -177,16 +177,16 @@ cChunkPtr cChunkMap::GetChunkNoGen(int a_ChunkX, int a_ChunkZ)
 	ASSERT(m_CSLayers.IsLockedByCurrentThread());  // m_CSLayers should already be locked by the operation that called us
 
 	cChunkLayer * Layer = GetLayerForChunk(a_ChunkX, a_ChunkZ);
-	if (Layer == NULL)
+	if (Layer == nullptr)
 	{
 		// An error must have occurred, since layers are automatically created if they don't exist
-		return NULL;
+		return nullptr;
 	}
 	
 	cChunkPtr Chunk = Layer->GetChunk(a_ChunkX, a_ChunkZ);
-	if (Chunk == NULL)
+	if (Chunk == nullptr)
 	{
-		return NULL;
+		return nullptr;
 	}
 	if (!Chunk->IsValid() && !Chunk->IsQueued())
 	{
@@ -206,10 +206,10 @@ cChunkPtr cChunkMap::GetChunkNoLoad( int a_ChunkX, int a_ChunkZ)
 	ASSERT(m_CSLayers.IsLockedByCurrentThread());  // m_CSLayers should already be locked by the operation that called us
 
 	cChunkLayer * Layer = GetLayerForChunk( a_ChunkX, a_ChunkZ);
-	if (Layer == NULL)
+	if (Layer == nullptr)
 	{
 		// An error must have occurred, since layers are automatically created if they don't exist
-		return NULL;
+		return nullptr;
 	}
 	
 	return Layer->GetChunk(a_ChunkX, a_ChunkZ);
@@ -227,7 +227,7 @@ bool cChunkMap::LockedGetBlock(int a_BlockX, int a_BlockY, int a_BlockZ, BLOCKTY
 	int ChunkX, ChunkZ;
 	cChunkDef::AbsoluteToRelative(a_BlockX, a_BlockY, a_BlockZ, ChunkX, ChunkZ);
 	cChunkPtr Chunk = GetChunkNoLoad(ChunkX, ChunkZ);
-	if (Chunk == NULL)
+	if (Chunk == nullptr)
 	{
 		return false;
 	}
@@ -249,7 +249,7 @@ bool cChunkMap::LockedGetBlockType(int a_BlockX, int a_BlockY, int a_BlockZ, BLO
 	int ChunkX, ChunkZ;
 	cChunkDef::AbsoluteToRelative(a_BlockX, a_BlockY, a_BlockZ, ChunkX, ChunkZ);
 	cChunkPtr Chunk = GetChunkNoLoad(ChunkX, ChunkZ);
-	if (Chunk == NULL)
+	if (Chunk == nullptr)
 	{
 		return false;
 	}
@@ -270,7 +270,7 @@ bool cChunkMap::LockedGetBlockMeta(int a_BlockX, int a_BlockY, int a_BlockZ, NIB
 	int ChunkX, ChunkZ;
 	cChunkDef::AbsoluteToRelative(a_BlockX, a_BlockY, a_BlockZ, ChunkX, ChunkZ);
 	cChunkPtr Chunk = GetChunkNoLoad(ChunkX, ChunkZ);
-	if (Chunk == NULL)
+	if (Chunk == nullptr)
 	{
 		return false;
 	}
@@ -289,7 +289,7 @@ bool cChunkMap::LockedSetBlock(int a_BlockX, int a_BlockY, int a_BlockZ, BLOCKTY
 	int ChunkX, ChunkZ;
 	cChunkDef::AbsoluteToRelative(a_BlockX, a_BlockY, a_BlockZ, ChunkX, ChunkZ);
 	cChunkPtr Chunk = GetChunkNoLoad(ChunkX, ChunkZ);
-	if (Chunk == NULL)
+	if (Chunk == nullptr)
 	{
 		return false;
 	}
@@ -308,7 +308,7 @@ bool cChunkMap::LockedFastSetBlock(int a_BlockX, int a_BlockY, int a_BlockZ, BLO
 	int ChunkX, ChunkZ;
 	cChunkDef::AbsoluteToRelative(a_BlockX, a_BlockY, a_BlockZ, ChunkX, ChunkZ);
 	cChunkPtr Chunk = GetChunkNoLoad(ChunkX, ChunkZ);
-	if (Chunk == NULL)
+	if (Chunk == nullptr)
 	{
 		return false;
 	}
@@ -326,9 +326,9 @@ cChunk * cChunkMap::FindChunk(int a_ChunkX, int a_ChunkZ)
 	ASSERT(m_CSLayers.IsLockedByCurrentThread());
 	
 	cChunkLayer * Layer = FindLayerForChunk(a_ChunkX, a_ChunkZ);
-	if (Layer == NULL)
+	if (Layer == nullptr)
 	{
-		return NULL;
+		return nullptr;
 	}
 	return Layer->FindChunk(a_ChunkX, a_ChunkZ);
 }
@@ -341,7 +341,7 @@ void cChunkMap::BroadcastAttachEntity(const cEntity & a_Entity, const cEntity *
 {
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoGen(a_Entity.GetChunkX(), a_Entity.GetChunkZ());
-	if (Chunk == NULL)
+	if (Chunk == nullptr)
 	{
 		return;
 	}
@@ -361,7 +361,7 @@ void cChunkMap::BroadcastBlockAction(int a_BlockX, int a_BlockY, int a_BlockZ, c
 	z = a_BlockZ;
 	cChunkDef::BlockToChunk(x, z, ChunkX, ChunkZ);
 	cChunkPtr Chunk = GetChunkNoGen(ChunkX, ChunkZ);
-	if (Chunk == NULL)
+	if (Chunk == nullptr)
 	{
 		return;
 	}
@@ -380,7 +380,7 @@ void cChunkMap::BroadcastBlockBreakAnimation(int a_entityID, int a_blockX, int a
 
 	cChunkDef::BlockToChunk(a_blockX, a_blockZ, ChunkX, ChunkZ);
 	cChunkPtr Chunk = GetChunkNoGen(ChunkX, ChunkZ);
-	if (Chunk == NULL)
+	if (Chunk == nullptr)
 	{
 		return;
 	}
@@ -398,7 +398,7 @@ void cChunkMap::BroadcastBlockEntity(int a_BlockX, int a_BlockY, int a_BlockZ, c
 	int ChunkX, ChunkZ;
 	cChunkDef::BlockToChunk(a_BlockX, a_BlockZ, ChunkX, ChunkZ);
 	cChunkPtr Chunk = GetChunkNoGen(ChunkX, ChunkZ);
-	if ((Chunk == NULL) || !Chunk->IsValid())
+	if ((Chunk == nullptr) || !Chunk->IsValid())
 	{
 		return;
 	}
@@ -413,7 +413,7 @@ void cChunkMap::BroadcastChunkData(int a_ChunkX, int a_ChunkZ, cChunkDataSeriali
 {
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoGen(a_ChunkX, a_ChunkZ);
-	if (Chunk == NULL)
+	if (Chunk == nullptr)
 	{
 		return;
 	}
@@ -429,7 +429,7 @@ void cChunkMap::BroadcastCollectEntity(const cEntity & a_Entity, const cPlayer &
 {
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoGen(a_Entity.GetChunkX(), a_Entity.GetChunkZ());
-	if (Chunk == NULL)
+	if (Chunk == nullptr)
 	{
 		return;
 	}
@@ -445,7 +445,7 @@ void cChunkMap::BroadcastDestroyEntity(const cEntity & a_Entity, const cClientHa
 {
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoGen(a_Entity.GetChunkX(), a_Entity.GetChunkZ());
-	if (Chunk == NULL)
+	if (Chunk == nullptr)
 	{
 		return;
 	}
@@ -461,7 +461,7 @@ void cChunkMap::BroadcastEntityEffect(const cEntity & a_Entity, int a_EffectID,
 {
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoGen(a_Entity.GetChunkX(), a_Entity.GetChunkZ());
-	if (Chunk == NULL)
+	if (Chunk == nullptr)
 	{
 		return;
 	}
@@ -477,7 +477,7 @@ void cChunkMap::BroadcastEntityEquipment(const cEntity & a_Entity, short a_SlotN
 {
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoGen(a_Entity.GetChunkX(), a_Entity.GetChunkZ());
-	if (Chunk == NULL)
+	if (Chunk == nullptr)
 	{
 		return;
 	}
@@ -493,7 +493,7 @@ void cChunkMap::BroadcastEntityHeadLook(const cEntity & a_Entity, const cClientH
 {
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoGen(a_Entity.GetChunkX(), a_Entity.GetChunkZ());
-	if (Chunk == NULL)
+	if (Chunk == nullptr)
 	{
 		return;
 	}
@@ -509,7 +509,7 @@ void cChunkMap::BroadcastEntityLook(const cEntity & a_Entity, const cClientHandl
 {
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoGen(a_Entity.GetChunkX(), a_Entity.GetChunkZ());
-	if (Chunk == NULL)
+	if (Chunk == nullptr)
 	{
 		return;
 	}
@@ -525,7 +525,7 @@ void cChunkMap::BroadcastEntityMetadata(const cEntity & a_Entity, const cClientH
 {
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoGen(a_Entity.GetChunkX(), a_Entity.GetChunkZ());
-	if (Chunk == NULL)
+	if (Chunk == nullptr)
 	{
 		return;
 	}
@@ -541,7 +541,7 @@ void cChunkMap::BroadcastEntityRelMove(const cEntity & a_Entity, char a_RelX, ch
 {
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoGen(a_Entity.GetChunkX(), a_Entity.GetChunkZ());
-	if (Chunk == NULL)
+	if (Chunk == nullptr)
 	{
 		return;
 	}
@@ -557,7 +557,7 @@ void cChunkMap::BroadcastEntityRelMoveLook(const cEntity & a_Entity, char a_RelX
 {
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoGen(a_Entity.GetChunkX(), a_Entity.GetChunkZ());
-	if (Chunk == NULL)
+	if (Chunk == nullptr)
 	{
 		return;
 	}
@@ -573,7 +573,7 @@ void cChunkMap::BroadcastEntityStatus(const cEntity & a_Entity, char a_Status, c
 {
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoGen(a_Entity.GetChunkX(), a_Entity.GetChunkZ());
-	if (Chunk == NULL)
+	if (Chunk == nullptr)
 	{
 		return;
 	}
@@ -589,7 +589,7 @@ void cChunkMap::BroadcastEntityVelocity(const cEntity & a_Entity, const cClientH
 {
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoGen(a_Entity.GetChunkX(), a_Entity.GetChunkZ());
-	if (Chunk == NULL)
+	if (Chunk == nullptr)
 	{
 		return;
 	}
@@ -605,7 +605,7 @@ void cChunkMap::BroadcastEntityAnimation(const cEntity & a_Entity, char a_Animat
 {
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoGen(a_Entity.GetChunkX(), a_Entity.GetChunkZ());
-	if (Chunk == NULL)
+	if (Chunk == nullptr)
 	{
 		return;
 	}
@@ -624,7 +624,7 @@ void cChunkMap::BroadcastParticleEffect(const AString & a_ParticleName, float a_
 
 	cChunkDef::BlockToChunk((int) a_SrcX, (int) a_SrcZ, ChunkX, ChunkZ);
 	cChunkPtr Chunk = GetChunkNoGen(ChunkX, ChunkZ);
-	if (Chunk == NULL)
+	if (Chunk == nullptr)
 	{
 		return;
 	}
@@ -641,7 +641,7 @@ void cChunkMap::BroadcastRemoveEntityEffect(const cEntity & a_Entity, int a_Effe
 	cCSLock Lock(m_CSLayers);
 	
 	cChunkPtr Chunk = GetChunkNoGen(a_Entity.GetChunkX(), a_Entity.GetChunkZ());
-	if (Chunk == NULL)
+	if (Chunk == nullptr)
 	{
 		return;
 	}
@@ -660,7 +660,7 @@ void cChunkMap::BroadcastSoundEffect(const AString & a_SoundName, double a_X, do
 
 	cChunkDef::BlockToChunk((int)std::floor(a_X), (int)std::floor(a_Z), ChunkX, ChunkZ);
 	cChunkPtr Chunk = GetChunkNoGen(ChunkX, ChunkZ);
-	if (Chunk == NULL)
+	if (Chunk == nullptr)
 	{
 		return;
 	}
@@ -679,7 +679,7 @@ void cChunkMap::BroadcastSoundParticleEffect(int a_EffectID, int a_SrcX, int a_S
 
 	cChunkDef::BlockToChunk(a_SrcX, a_SrcZ, ChunkX, ChunkZ);
 	cChunkPtr Chunk = GetChunkNoGen(ChunkX, ChunkZ);
-	if (Chunk == NULL)
+	if (Chunk == nullptr)
 	{
 		return;
 	}
@@ -695,7 +695,7 @@ void cChunkMap::BroadcastSpawnEntity(cEntity & a_Entity, const cClientHandle * a
 {
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoGen(a_Entity.GetChunkX(), a_Entity.GetChunkZ());
-	if (Chunk == NULL)
+	if (Chunk == nullptr)
 	{
 		return;
 	}
@@ -713,7 +713,7 @@ void cChunkMap::BroadcastThunderbolt(int a_BlockX, int a_BlockY, int a_BlockZ, c
 	int ChunkX, ChunkZ;
 	cChunkDef::BlockToChunk(a_BlockX, a_BlockZ, ChunkX, ChunkZ);
 	cChunkPtr Chunk = GetChunkNoGen(ChunkX, ChunkZ);
-	if (Chunk == NULL)
+	if (Chunk == nullptr)
 	{
 		return;
 	}
@@ -732,7 +732,7 @@ void cChunkMap::BroadcastUseBed(const cEntity & a_Entity, int a_BlockX, int a_Bl
 
 	cChunkDef::BlockToChunk(a_BlockX, a_BlockZ, ChunkX, ChunkZ);
 	cChunkPtr Chunk = GetChunkNoGen(ChunkX, ChunkZ);
-	if (Chunk == NULL)
+	if (Chunk == nullptr)
 	{
 		return;
 	}
@@ -750,7 +750,7 @@ void cChunkMap::SendBlockEntity(int a_BlockX, int a_BlockY, int a_BlockZ, cClien
 	int ChunkX, ChunkZ;
 	cChunkDef::BlockToChunk(a_BlockX, a_BlockZ, ChunkX, ChunkZ);
 	cChunkPtr Chunk = GetChunkNoGen(ChunkX, ChunkZ);
-	if ((Chunk == NULL) || !Chunk->IsValid())
+	if ((Chunk == nullptr) || !Chunk->IsValid())
 	{
 		return;
 	}
@@ -768,7 +768,7 @@ void cChunkMap::UseBlockEntity(cPlayer * a_Player, int a_BlockX, int a_BlockY, i
 	int ChunkX, ChunkZ;
 	cChunkDef::BlockToChunk(a_BlockX, a_BlockZ, ChunkX, ChunkZ);
 	cChunkPtr Chunk = GetChunkNoGen(ChunkX, ChunkZ);
-	if ((Chunk == NULL) || !Chunk->IsValid())
+	if ((Chunk == nullptr) || !Chunk->IsValid())
 	{
 		return;
 	}
@@ -783,7 +783,7 @@ bool cChunkMap::DoWithChunk(int a_ChunkX, int a_ChunkZ, cChunkCallback & a_Callb
 {
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoLoad(a_ChunkX, a_ChunkZ);
-	if (Chunk == NULL)
+	if (Chunk == nullptr)
 	{
 		return false;
 	}
@@ -800,7 +800,7 @@ void cChunkMap::WakeUpSimulators(int a_BlockX, int a_BlockY, int a_BlockZ)
 	int ChunkX, ChunkZ;
 	cChunkDef::BlockToChunk(a_BlockX, a_BlockZ, ChunkX, ChunkZ);
 	cChunkPtr Chunk = GetChunkNoGen(ChunkX, ChunkZ);
-	if ((Chunk == NULL) || !Chunk->IsValid())
+	if ((Chunk == nullptr) || !Chunk->IsValid())
 	{
 		return;
 	}
@@ -829,7 +829,7 @@ void cChunkMap::WakeUpSimulatorsInArea(int a_MinBlockX, int a_MaxBlockX, int a_M
 		for (int x = MinChunkX; x <= MaxChunkX; x++)
 		{
 			cChunkPtr Chunk = GetChunkNoGen(x, z);
-			if ((Chunk == NULL) || !Chunk->IsValid())
+			if ((Chunk == nullptr) || !Chunk->IsValid())
 			{
 				continue;
 			}
@@ -857,7 +857,7 @@ void cChunkMap::MarkRedstoneDirty(int a_ChunkX, int a_ChunkZ)
 {
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoGen(a_ChunkX, a_ChunkZ);
-	if ((Chunk == NULL) || !Chunk->IsValid())
+	if ((Chunk == nullptr) || !Chunk->IsValid())
 	{
 		return;
 	}
@@ -872,7 +872,7 @@ void cChunkMap::MarkChunkDirty(int a_ChunkX, int a_ChunkZ, bool a_MarkRedstoneDi
 {
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoGen(a_ChunkX, a_ChunkZ);
-	if ((Chunk == NULL) || !Chunk->IsValid())
+	if ((Chunk == nullptr) || !Chunk->IsValid())
 	{
 		return;
 	}
@@ -891,7 +891,7 @@ void cChunkMap::MarkChunkSaving(int a_ChunkX, int a_ChunkZ)
 {
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoGen(a_ChunkX, a_ChunkZ);
-	if ((Chunk == NULL) || !Chunk->IsValid())
+	if ((Chunk == nullptr) || !Chunk->IsValid())
 	{
 		return;
 	}
@@ -906,7 +906,7 @@ void cChunkMap::MarkChunkSaved (int a_ChunkX, int a_ChunkZ)
 {
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoGen(a_ChunkX, a_ChunkZ);
-	if ((Chunk == NULL) || !Chunk->IsValid())
+	if ((Chunk == nullptr) || !Chunk->IsValid())
 	{
 		return;
 	}
@@ -924,7 +924,7 @@ void cChunkMap::SetChunkData(cSetChunkData & a_SetChunkData)
 	{
 		cCSLock Lock(m_CSLayers);
 		cChunkPtr Chunk = GetChunkNoLoad(ChunkX, ChunkZ);
-		if (Chunk == NULL)
+		if (Chunk == nullptr)
 		{
 			return;
 		}
@@ -969,7 +969,7 @@ void cChunkMap::ChunkLighted(
 {
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoLoad(a_ChunkX, a_ChunkZ);
-	if (Chunk == NULL)
+	if (Chunk == nullptr)
 	{
 		return;
 	}
@@ -985,7 +985,7 @@ bool cChunkMap::GetChunkData(int a_ChunkX, int a_ChunkZ, cChunkDataCallback & a_
 {
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoGen(a_ChunkX, a_ChunkZ);
-	if ((Chunk == NULL) || !Chunk->IsValid())
+	if ((Chunk == nullptr) || !Chunk->IsValid())
 	{
 		return false;
 	}
@@ -1001,7 +1001,7 @@ bool cChunkMap::GetChunkBlockTypes(int a_ChunkX, int a_ChunkZ, BLOCKTYPE * a_Blo
 {
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoGen(a_ChunkX, a_ChunkZ);
-	if ((Chunk == NULL) || !Chunk->IsValid())
+	if ((Chunk == nullptr) || !Chunk->IsValid())
 	{
 		return false;
 	}
@@ -1017,7 +1017,7 @@ bool cChunkMap::IsChunkQueued(int a_ChunkX, int a_ChunkZ)
 {
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoLoad(a_ChunkX, a_ChunkZ);
-	return (Chunk != NULL) && Chunk->IsQueued();
+	return (Chunk != nullptr) && Chunk->IsQueued();
 }
 
 
@@ -1028,7 +1028,7 @@ bool cChunkMap::IsChunkValid(int a_ChunkX, int a_ChunkZ)
 {
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoLoad(a_ChunkX, a_ChunkZ);
-	return (Chunk != NULL) && Chunk->IsValid();
+	return (Chunk != nullptr) && Chunk->IsValid();
 }
 
 
@@ -1039,7 +1039,7 @@ bool cChunkMap::HasChunkAnyClients(int a_ChunkX, int a_ChunkZ)
 {
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoGen(a_ChunkX, a_ChunkZ);
-	return (Chunk != NULL) && Chunk->HasAnyClients();
+	return (Chunk != nullptr) && Chunk->HasAnyClients();
 }
 
 
@@ -1054,7 +1054,7 @@ int  cChunkMap::GetHeight(int a_BlockX, int a_BlockZ)
 		int ChunkX, ChunkZ, BlockY = 0;
 		cChunkDef::AbsoluteToRelative(a_BlockX, BlockY, a_BlockZ, ChunkX, ChunkZ);
 		cChunkPtr Chunk = GetChunk(ChunkX, ChunkZ);
-		if (Chunk == NULL)
+		if (Chunk == nullptr)
 		{
 			return 0;
 		}
@@ -1081,7 +1081,7 @@ bool cChunkMap::TryGetHeight(int a_BlockX, int a_BlockZ, int & a_Height)
 	int ChunkX, ChunkZ, BlockY = 0;
 	cChunkDef::AbsoluteToRelative(a_BlockX, BlockY, a_BlockZ, ChunkX, ChunkZ);
 	cChunkPtr Chunk = GetChunkNoLoad(ChunkX, ChunkZ);
-	if ((Chunk == NULL) || !Chunk->IsValid())
+	if ((Chunk == nullptr) || !Chunk->IsValid())
 	{
 		return false;
 	}
@@ -1104,7 +1104,7 @@ void cChunkMap::FastSetBlocks(sSetBlockList & a_BlockList)
 		int ChunkZ = a_BlockList.front().ChunkZ;
 		cCSLock Lock(m_CSLayers);
 		cChunkPtr Chunk = GetChunkNoGen(ChunkX, ChunkZ);
-		if ((Chunk != NULL) && Chunk->IsValid())
+		if ((Chunk != nullptr) && Chunk->IsValid())
 		{
 			for (sSetBlockList::iterator itr = a_BlockList.begin(); itr != a_BlockList.end();)
 			{
@@ -1193,7 +1193,7 @@ BLOCKTYPE cChunkMap::GetBlock(int a_BlockX, int a_BlockY, int a_BlockZ)
 	
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunk(ChunkX, ChunkZ);
-	if ((Chunk != NULL) && Chunk->IsValid())
+	if ((Chunk != nullptr) && Chunk->IsValid())
 	{
 		return Chunk->GetBlock(a_BlockX, a_BlockY, a_BlockZ);
 	}
@@ -1222,7 +1222,7 @@ NIBBLETYPE cChunkMap::GetBlockMeta(int a_BlockX, int a_BlockY, int a_BlockZ)
 	
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunk( ChunkX, ChunkZ);
-	if ((Chunk != NULL) && Chunk->IsValid())
+	if ((Chunk != nullptr) && Chunk->IsValid())
 	{
 		return Chunk->GetMeta(a_BlockX, a_BlockY, a_BlockZ);
 	}
@@ -1240,7 +1240,7 @@ NIBBLETYPE cChunkMap::GetBlockSkyLight(int a_BlockX, int a_BlockY, int a_BlockZ)
 
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunk( ChunkX, ChunkZ);
-	if ((Chunk != NULL) && Chunk->IsValid())
+	if ((Chunk != nullptr) && Chunk->IsValid())
 	{
 		return Chunk->GetSkyLight(a_BlockX, a_BlockY, a_BlockZ);
 	}
@@ -1258,7 +1258,7 @@ NIBBLETYPE cChunkMap::GetBlockBlockLight(int a_BlockX, int a_BlockY, int a_Block
 
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunk( ChunkX, ChunkZ);
-	if ((Chunk != NULL) && Chunk->IsValid())
+	if ((Chunk != nullptr) && Chunk->IsValid())
 	{
 		return Chunk->GetBlockLight(a_BlockX, a_BlockY, a_BlockZ);
 	}
@@ -1277,7 +1277,7 @@ void cChunkMap::SetBlockMeta(int a_BlockX, int a_BlockY, int a_BlockZ, NIBBLETYP
 
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunk(ChunkX, ChunkZ);
-	if ((Chunk != NULL) && Chunk->IsValid())
+	if ((Chunk != nullptr) && Chunk->IsValid())
 	{
 		Chunk->SetMeta(a_BlockX, a_BlockY, a_BlockZ, a_BlockMeta);
 	}
@@ -1300,7 +1300,7 @@ void cChunkMap::SetBlock(int a_BlockX, int a_BlockY, int a_BlockZ, BLOCKTYPE a_B
 
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunk( ChunkX, ChunkZ);
-	if ((Chunk != NULL) && Chunk->IsValid())
+	if ((Chunk != nullptr) && Chunk->IsValid())
 	{
 		Chunk->SetBlock(X, Y, Z, a_BlockType, a_BlockMeta, a_SendToClients);
 		m_World->GetSimulatorManager()->WakeUp(a_BlockX, a_BlockY, a_BlockZ, Chunk);
@@ -1319,7 +1319,7 @@ void cChunkMap::QueueSetBlock(int a_BlockX, int a_BlockY, int a_BlockZ, BLOCKTYP
 
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunk(ChunkX, ChunkZ);
-	if ((Chunk != NULL) && Chunk->IsValid())
+	if ((Chunk != nullptr) && Chunk->IsValid())
 	{
 		Chunk->QueueSetBlock(X, Y, Z, a_BlockType, a_BlockMeta, a_Tick, a_PreviousBlockType);
 	}
@@ -1336,7 +1336,7 @@ bool cChunkMap::GetBlockTypeMeta(int a_BlockX, int a_BlockY, int a_BlockZ, BLOCK
 
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunk( ChunkX, ChunkZ);
-	if ((Chunk != NULL) && Chunk->IsValid())
+	if ((Chunk != nullptr) && Chunk->IsValid())
 	{
 		Chunk->GetBlockTypeMeta(X, Y, Z, a_BlockType, a_BlockMeta);
 		return true;
@@ -1355,7 +1355,7 @@ bool cChunkMap::GetBlockInfo(int a_BlockX, int a_BlockY, int a_BlockZ, BLOCKTYPE
 
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunk( ChunkX, ChunkZ);
-	if ((Chunk != NULL) && Chunk->IsValid())
+	if ((Chunk != nullptr) && Chunk->IsValid())
 	{
 		Chunk->GetBlockInfo(X, Y, Z, a_BlockType, a_Meta, a_SkyLight, a_BlockLight);
 		return true;
@@ -1373,7 +1373,7 @@ void cChunkMap::ReplaceBlocks(const sSetBlockVector & a_Blocks, BLOCKTYPE a_Filt
 	for (sSetBlockVector::const_iterator itr = a_Blocks.begin(); itr != a_Blocks.end(); ++itr)
 	{
 		cChunkPtr Chunk = GetChunk(itr->ChunkX, itr->ChunkZ);
-		if ((Chunk == NULL) || !Chunk->IsValid())
+		if ((Chunk == nullptr) || !Chunk->IsValid())
 		{
 			continue;
 		}
@@ -1394,7 +1394,7 @@ void cChunkMap::ReplaceTreeBlocks(const sSetBlockVector & a_Blocks)
 	for (sSetBlockVector::const_iterator itr = a_Blocks.begin(); itr != a_Blocks.end(); ++itr)
 	{
 		cChunkPtr Chunk = GetChunk(itr->ChunkX, itr->ChunkZ);
-		if ((Chunk == NULL) || !Chunk->IsValid())
+		if ((Chunk == nullptr) || !Chunk->IsValid())
 		{
 			continue;
 		}
@@ -1429,7 +1429,7 @@ EMCSBiome cChunkMap::GetBiomeAt (int a_BlockX, int a_BlockZ)
 
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunk(ChunkX, ChunkZ);
-	if ((Chunk != NULL) && Chunk->IsValid())
+	if ((Chunk != nullptr) && Chunk->IsValid())
 	{
 		return Chunk->GetBiomeAt(X, Z);
 	}
@@ -1450,7 +1450,7 @@ bool cChunkMap::SetBiomeAt(int a_BlockX, int a_BlockZ, EMCSBiome a_Biome)
 
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunk(ChunkX, ChunkZ);
-	if ((Chunk != NULL) && Chunk->IsValid())
+	if ((Chunk != nullptr) && Chunk->IsValid())
 	{
 		Chunk->SetBiomeAt(X, Z, a_Biome);
 		return true;
@@ -1483,7 +1483,7 @@ bool cChunkMap::SetAreaBiome(int a_MinX, int a_MaxX, int a_MinZ, int a_MaxZ, EMC
 			int MinRelZ = (z == MinChunkZ) ? MinZ : 0;
 			int MaxRelZ = (z == MaxChunkZ) ? MaxZ : cChunkDef::Width - 1;
 			cChunkPtr Chunk = GetChunkNoLoad(x, z);
-			if ((Chunk != NULL) && Chunk->IsValid())
+			if ((Chunk != nullptr) && Chunk->IsValid())
 			{
 				Chunk->SetAreaBiome(MinRelX, MaxRelX, MinRelZ, MaxRelZ, a_Biome);
 			}
@@ -1507,7 +1507,7 @@ bool cChunkMap::GetBlocks(sSetBlockVector & a_Blocks, bool a_ContinueOnFailure)
 	for (sSetBlockVector::iterator itr = a_Blocks.begin(); itr != a_Blocks.end(); ++itr)
 	{
 		cChunkPtr Chunk = GetChunk(itr->ChunkX, itr->ChunkZ);
-		if ((Chunk == NULL) || !Chunk->IsValid())
+		if ((Chunk == nullptr) || !Chunk->IsValid())
 		{
 			if (!a_ContinueOnFailure)
 			{
@@ -1535,7 +1535,7 @@ bool cChunkMap::DigBlock(int a_X, int a_Y, int a_Z)
 	{
 		cCSLock Lock(m_CSLayers);
 		cChunkPtr DestChunk = GetChunk( ChunkX, ChunkZ);
-		if ((DestChunk == NULL) || !DestChunk->IsValid())
+		if ((DestChunk == nullptr) || !DestChunk->IsValid())
 		{
 			return false;
 		}
@@ -1558,7 +1558,7 @@ void cChunkMap::SendBlockTo(int a_X, int a_Y, int a_Z, cPlayer * a_Player)
 	
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunk(ChunkX, ChunkZ);
-	if ((Chunk != NULL) && (Chunk->IsValid()))
+	if ((Chunk != nullptr) && (Chunk->IsValid()))
 	{
 		Chunk->SendBlockTo(a_X, a_Y, a_Z, a_Player->GetClientHandle());
 	}
@@ -1572,12 +1572,12 @@ void cChunkMap::CompareChunkClients(int a_ChunkX1, int a_ChunkZ1, int a_ChunkX2,
 {
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk1 = GetChunkNoGen(a_ChunkX1, a_ChunkZ1);
-	if (Chunk1 == NULL)
+	if (Chunk1 == nullptr)
 	{
 		return;
 	}
 	cChunkPtr Chunk2 = GetChunkNoGen(a_ChunkX2, a_ChunkZ2);
-	if (Chunk2 == NULL)
+	if (Chunk2 == nullptr)
 	{
 		return;
 	}
@@ -1639,7 +1639,7 @@ bool cChunkMap::AddChunkClient(int a_ChunkX, int a_ChunkZ, cClientHandle * a_Cli
 {
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunk(a_ChunkX, a_ChunkZ);
-	if (Chunk == NULL)
+	if (Chunk == nullptr)
 	{
 		return false;
 	}
@@ -1654,7 +1654,7 @@ void cChunkMap::RemoveChunkClient(int a_ChunkX, int a_ChunkZ, cClientHandle * a_
 {
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoGen(a_ChunkX, a_ChunkZ);
-	if (Chunk == NULL)
+	if (Chunk == nullptr)
 	{
 		return;
 	}
@@ -1684,7 +1684,7 @@ void cChunkMap::AddEntity(cEntity * a_Entity)
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoGen(a_Entity->GetChunkX(), a_Entity->GetChunkZ());
 	if (
-		(Chunk == NULL) ||  // Chunk not present at all
+		(Chunk == nullptr) ||  // Chunk not present at all
 		(!Chunk->IsValid() && !a_Entity->IsPlayer())  // Chunk present, but no valid data; players need to spawn in such chunks (#953)
 	)
 	{
@@ -1705,7 +1705,7 @@ void cChunkMap::AddEntityIfNotPresent(cEntity * a_Entity)
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoGen(a_Entity->GetChunkX(), a_Entity->GetChunkZ());
 	if (
-		(Chunk == NULL) ||  // Chunk not present at all
+		(Chunk == nullptr) ||  // Chunk not present at all
 		(!Chunk->IsValid() && !a_Entity->IsPlayer())  // Chunk present, but no valid data; players need to spawn in such chunks (#953)
 	)
 	{
@@ -1747,7 +1747,7 @@ void cChunkMap::RemoveEntity(cEntity * a_Entity)
 	cChunkPtr Chunk = GetChunkNoGen(a_Entity->GetChunkX(), a_Entity->GetChunkZ());
 
 	// Even if a chunk is not valid, it may still contain entities such as players; make sure to remove them (#1190)
-	if (Chunk == NULL)
+	if (Chunk == nullptr)
 	{
 		return;
 	}
@@ -1779,7 +1779,7 @@ bool cChunkMap::ForEachEntityInChunk(int a_ChunkX, int a_ChunkZ, cEntityCallback
 {
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoGen(a_ChunkX, a_ChunkZ);
-	if ((Chunk == NULL) || !Chunk->IsValid())
+	if ((Chunk == nullptr) || !Chunk->IsValid())
 	{
 		return false;
 	}
@@ -1805,7 +1805,7 @@ bool cChunkMap::ForEachEntityInBox(const cBoundingBox & a_Box, cEntityCallback &
 		for (int x = MinChunkX; x <= MaxChunkX; x++)
 		{
 			cChunkPtr Chunk = GetChunkNoGen(x, z);
-			if ((Chunk == NULL) || !Chunk->IsValid())
+			if ((Chunk == nullptr) || !Chunk->IsValid())
 			{
 				continue;
 			}
@@ -1980,7 +1980,7 @@ void cChunkMap::DoExplosionAt(double a_ExplosionSize, double a_BlockX, double a_
 				}
 
 				// Ensure that the damage dealt is inversely proportional to the distance to the TNT centre - the closer a player is, the harder they are hit
-				a_Entity->TakeDamage(dtExplosion, NULL, (int)((1 / DistanceFromExplosion.Length()) * 6 * m_ExplosionSize), 0);
+				a_Entity->TakeDamage(dtExplosion, nullptr, (int)((1 / DistanceFromExplosion.Length()) * 6 * m_ExplosionSize), 0);
 			}
 
 			// Apply force to entities around the explosion - code modified from World.cpp DoExplosionAt()
@@ -2038,7 +2038,7 @@ bool cChunkMap::ForEachBlockEntityInChunk(int a_ChunkX, int a_ChunkZ, cBlockEnti
 {
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoGen(a_ChunkX, a_ChunkZ);
-	if ((Chunk == NULL) || !Chunk->IsValid())
+	if ((Chunk == nullptr) || !Chunk->IsValid())
 	{
 		return false;
 	}
@@ -2053,7 +2053,7 @@ bool cChunkMap::ForEachChestInChunk(int a_ChunkX, int a_ChunkZ, cChestCallback &
 {
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoGen(a_ChunkX, a_ChunkZ);
-	if ((Chunk == NULL) || !Chunk->IsValid())
+	if ((Chunk == nullptr) || !Chunk->IsValid())
 	{
 		return false;
 	}
@@ -2068,7 +2068,7 @@ bool cChunkMap::ForEachDispenserInChunk(int a_ChunkX, int a_ChunkZ, cDispenserCa
 {
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoGen(a_ChunkX, a_ChunkZ);
-	if ((Chunk == NULL) || !Chunk->IsValid())
+	if ((Chunk == nullptr) || !Chunk->IsValid())
 	{
 		return false;
 	}
@@ -2083,7 +2083,7 @@ bool cChunkMap::ForEachDropperInChunk(int a_ChunkX, int a_ChunkZ, cDropperCallba
 {
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoGen(a_ChunkX, a_ChunkZ);
-	if ((Chunk == NULL) || !Chunk->IsValid())
+	if ((Chunk == nullptr) || !Chunk->IsValid())
 	{
 		return false;
 	}
@@ -2098,7 +2098,7 @@ bool cChunkMap::ForEachDropSpenserInChunk(int a_ChunkX, int a_ChunkZ, cDropSpens
 {
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoGen(a_ChunkX, a_ChunkZ);
-	if ((Chunk == NULL) || !Chunk->IsValid())
+	if ((Chunk == nullptr) || !Chunk->IsValid())
 	{
 		return false;
 	}
@@ -2113,7 +2113,7 @@ bool cChunkMap::ForEachFurnaceInChunk(int a_ChunkX, int a_ChunkZ, cFurnaceCallba
 {
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoGen(a_ChunkX, a_ChunkZ);
-	if ((Chunk == NULL) || !Chunk->IsValid())
+	if ((Chunk == nullptr) || !Chunk->IsValid())
 	{
 		return false;
 	}
@@ -2131,7 +2131,7 @@ bool cChunkMap::DoWithBlockEntityAt(int a_BlockX, int a_BlockY, int a_BlockZ, cB
 	cChunkDef::AbsoluteToRelative(BlockX, BlockY, BlockZ, ChunkX, ChunkZ);
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoGen(ChunkX, ChunkZ);
-	if ((Chunk == NULL) || !Chunk->IsValid())
+	if ((Chunk == nullptr) || !Chunk->IsValid())
 	{
 		return false;
 	}
@@ -2149,7 +2149,7 @@ bool cChunkMap::DoWithBeaconAt(int a_BlockX, int a_BlockY, int a_BlockZ, cBeacon
 	cChunkDef::AbsoluteToRelative(BlockX, BlockY, BlockZ, ChunkX, ChunkZ);
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoGen(ChunkX, ChunkZ);
-	if ((Chunk == NULL) || !Chunk->IsValid())
+	if ((Chunk == nullptr) || !Chunk->IsValid())
 	{
 		return false;
 	}
@@ -2167,7 +2167,7 @@ bool cChunkMap::DoWithChestAt(int a_BlockX, int a_BlockY, int a_BlockZ, cChestCa
 	cChunkDef::AbsoluteToRelative(BlockX, BlockY, BlockZ, ChunkX, ChunkZ);
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoGen(ChunkX, ChunkZ);
-	if ((Chunk == NULL) || !Chunk->IsValid())
+	if ((Chunk == nullptr) || !Chunk->IsValid())
 	{
 		return false;
 	}
@@ -2185,7 +2185,7 @@ bool cChunkMap::DoWithDispenserAt(int a_BlockX, int a_BlockY, int a_BlockZ, cDis
 	cChunkDef::AbsoluteToRelative(BlockX, BlockY, BlockZ, ChunkX, ChunkZ);
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoGen(ChunkX, ChunkZ);
-	if ((Chunk == NULL) || !Chunk->IsValid())
+	if ((Chunk == nullptr) || !Chunk->IsValid())
 	{
 		return false;
 	}
@@ -2203,7 +2203,7 @@ bool cChunkMap::DoWithDropperAt(int a_BlockX, int a_BlockY, int a_BlockZ, cDropp
 	cChunkDef::AbsoluteToRelative(BlockX, BlockY, BlockZ, ChunkX, ChunkZ);
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoGen(ChunkX, ChunkZ);
-	if ((Chunk == NULL) || !Chunk->IsValid())
+	if ((Chunk == nullptr) || !Chunk->IsValid())
 	{
 		return false;
 	}
@@ -2221,7 +2221,7 @@ bool cChunkMap::DoWithDropSpenserAt(int a_BlockX, int a_BlockY, int a_BlockZ, cD
 	cChunkDef::AbsoluteToRelative(BlockX, BlockY, BlockZ, ChunkX, ChunkZ);
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoGen(ChunkX, ChunkZ);
-	if ((Chunk == NULL) || !Chunk->IsValid())
+	if ((Chunk == nullptr) || !Chunk->IsValid())
 	{
 		return false;
 	}
@@ -2239,7 +2239,7 @@ bool cChunkMap::DoWithFurnaceAt(int a_BlockX, int a_BlockY, int a_BlockZ, cFurna
 	cChunkDef::AbsoluteToRelative(BlockX, BlockY, BlockZ, ChunkX, ChunkZ);
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoGen(ChunkX, ChunkZ);
-	if ((Chunk == NULL) || !Chunk->IsValid())
+	if ((Chunk == nullptr) || !Chunk->IsValid())
 	{
 		return false;
 	}
@@ -2256,7 +2256,7 @@ bool cChunkMap::DoWithNoteBlockAt(int a_BlockX, int a_BlockY, int a_BlockZ, cNot
 	cChunkDef::AbsoluteToRelative(BlockX, BlockY, BlockZ, ChunkX, ChunkZ);
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoGen(ChunkX, ChunkZ);
-	if ((Chunk == NULL) || !Chunk->IsValid())
+	if ((Chunk == nullptr) || !Chunk->IsValid())
 	{
 		return false;
 	}
@@ -2273,7 +2273,7 @@ bool cChunkMap::DoWithCommandBlockAt(int a_BlockX, int a_BlockY, int a_BlockZ, c
 	cChunkDef::AbsoluteToRelative(BlockX, BlockY, BlockZ, ChunkX, ChunkZ);
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoGen(ChunkX, ChunkZ);
-	if ((Chunk == NULL) || !Chunk->IsValid())
+	if ((Chunk == nullptr) || !Chunk->IsValid())
 	{
 		return false;
 	}
@@ -2291,7 +2291,7 @@ bool cChunkMap::DoWithMobHeadAt(int a_BlockX, int a_BlockY, int a_BlockZ, cMobHe
 	cChunkDef::AbsoluteToRelative(BlockX, BlockY, BlockZ, ChunkX, ChunkZ);
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoGen(ChunkX, ChunkZ);
-	if ((Chunk == NULL) || !Chunk->IsValid())
+	if ((Chunk == nullptr) || !Chunk->IsValid())
 	{
 		return false;
 	}
@@ -2309,7 +2309,7 @@ bool cChunkMap::DoWithFlowerPotAt(int a_BlockX, int a_BlockY, int a_BlockZ, cFlo
 	cChunkDef::AbsoluteToRelative(BlockX, BlockY, BlockZ, ChunkX, ChunkZ);
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoGen(ChunkX, ChunkZ);
-	if ((Chunk == NULL) || !Chunk->IsValid())
+	if ((Chunk == nullptr) || !Chunk->IsValid())
 	{
 		return false;
 	}
@@ -2327,7 +2327,7 @@ bool cChunkMap::GetSignLines(int a_BlockX, int a_BlockY, int a_BlockZ, AString &
 	cChunkDef::AbsoluteToRelative(BlockX, BlockY, BlockZ, ChunkX, ChunkZ);
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoGen(ChunkX, ChunkZ);
-	if ((Chunk == NULL) || !Chunk->IsValid())
+	if ((Chunk == nullptr) || !Chunk->IsValid())
 	{
 		return false;
 	}
@@ -2352,7 +2352,7 @@ void cChunkMap::ChunkLoadFailed(int a_ChunkX, int a_ChunkZ)
 {
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoLoad(a_ChunkX, a_ChunkZ);
-	if (Chunk == NULL)
+	if (Chunk == nullptr)
 	{
 		return;
 	}
@@ -2369,7 +2369,7 @@ bool cChunkMap::SetSignLines(int a_BlockX, int a_BlockY, int a_BlockZ, const ASt
 	int ChunkX, ChunkZ;
 	cChunkDef::BlockToChunk(a_BlockX, a_BlockZ, ChunkX, ChunkZ);
 	cChunkPtr Chunk = GetChunkNoGen(ChunkX, ChunkZ);
-	if ((Chunk == NULL) || !Chunk->IsValid())
+	if ((Chunk == nullptr) || !Chunk->IsValid())
 	{
 		return false;
 	}
@@ -2384,7 +2384,7 @@ void cChunkMap::MarkChunkRegenerating(int a_ChunkX, int a_ChunkZ)
 {
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoLoad(a_ChunkX, a_ChunkZ);
-	if (Chunk == NULL)
+	if (Chunk == nullptr)
 	{
 		// Not present
 		return;
@@ -2400,7 +2400,7 @@ bool cChunkMap::IsChunkLighted(int a_ChunkX, int a_ChunkZ)
 {
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoLoad(a_ChunkX, a_ChunkZ);
-	if (Chunk == NULL)
+	if (Chunk == nullptr)
 	{
 		// Not present
 		return false;
@@ -2421,7 +2421,7 @@ bool cChunkMap::ForEachChunkInRect(int a_MinChunkX, int a_MaxChunkX, int a_MinCh
 		for (int x = a_MinChunkX; x <= a_MaxChunkX; x++)
 		{
 			cChunkPtr Chunk = GetChunkNoLoad(x, z);
-			if ((Chunk == NULL) || (!Chunk->IsValid()))
+			if ((Chunk == nullptr) || (!Chunk->IsValid()))
 			{
 				// Not present / not valid
 				Result = false;
@@ -2463,7 +2463,7 @@ bool cChunkMap::WriteBlockArea(cBlockArea & a_Area, int a_MinBlockX, int a_MinBl
 		for (int x = MinChunkX; x <= MaxChunkX; x++)
 		{
 			cChunkPtr Chunk = GetChunkNoLoad(x, z);
-			if ((Chunk == NULL) || (!Chunk->IsValid()))
+			if ((Chunk == nullptr) || (!Chunk->IsValid()))
 			{
 				// Not present / not valid
 				Result = false;
@@ -2504,7 +2504,7 @@ void cChunkMap::GrowMelonPumpkin(int a_BlockX, int a_BlockY, int a_BlockZ, BLOCK
 	
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoLoad(ChunkX, ChunkZ);
-	if (Chunk != NULL)
+	if (Chunk != nullptr)
 	{
 		Chunk->GrowMelonPumpkin(a_BlockX, a_BlockY, a_BlockZ, a_BlockType, a_Rand);
 	}
@@ -2521,7 +2521,7 @@ void cChunkMap::GrowSugarcane(int a_BlockX, int a_BlockY, int a_BlockZ, int a_Nu
 	
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoLoad(ChunkX, ChunkZ);
-	if (Chunk != NULL)
+	if (Chunk != nullptr)
 	{
 		Chunk->GrowSugarcane(a_BlockX, a_BlockY, a_BlockZ, a_NumBlocksToGrow);
 	}
@@ -2538,7 +2538,7 @@ void cChunkMap::GrowCactus(int a_BlockX, int a_BlockY, int a_BlockZ, int a_NumBl
 	
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoLoad(ChunkX, ChunkZ);
-	if (Chunk != NULL)
+	if (Chunk != nullptr)
 	{
 		Chunk->GrowCactus(a_BlockX, a_BlockY, a_BlockZ, a_NumBlocksToGrow);
 	}
@@ -2555,7 +2555,7 @@ void cChunkMap::SetNextBlockTick(int a_BlockX, int a_BlockY, int a_BlockZ)
 	
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoLoad(ChunkX, ChunkZ);
-	if (Chunk != NULL)
+	if (Chunk != nullptr)
 	{
 		Chunk->SetNextBlockTick(a_BlockX, a_BlockY, a_BlockZ);
 	}
@@ -2610,7 +2610,7 @@ void cChunkMap::TickBlock(int a_BlockX, int a_BlockY, int a_BlockZ)
 	int ChunkX, ChunkZ;
 	cChunkDef::AbsoluteToRelative(a_BlockX, a_BlockY, a_BlockZ, ChunkX, ChunkZ);
 	cChunkPtr Chunk = GetChunkNoLoad(ChunkX, ChunkZ);
-	if ((Chunk == NULL) || !Chunk->IsValid())
+	if ((Chunk == nullptr) || !Chunk->IsValid())
 	{
 		return;
 	}
@@ -2679,7 +2679,7 @@ void cChunkMap::QueueTickBlock(int a_BlockX, int a_BlockY, int a_BlockZ)
 
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoLoad(ChunkX, ChunkZ);
-	if (Chunk != NULL)
+	if (Chunk != nullptr)
 	{
 		Chunk->QueueTickBlock(a_BlockX, a_BlockY, a_BlockZ);
 	}
@@ -2693,7 +2693,7 @@ void cChunkMap::SetChunkAlwaysTicked(int a_ChunkX, int a_ChunkZ, bool a_AlwaysTi
 {
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunkNoLoad(a_ChunkX, a_ChunkZ);
-	if (Chunk != NULL)
+	if (Chunk != nullptr)
 	{
 		Chunk->SetAlwaysTicked(a_AlwaysTicked);
 	}
@@ -2729,7 +2729,7 @@ cChunkMap::cChunkLayer::~cChunkLayer()
 	for (size_t i = 0; i < ARRAYCOUNT(m_Chunks); ++i)
 	{
 		delete m_Chunks[i];
-		m_Chunks[i] = NULL;  // Must zero out, because further chunk deletions query the chunkmap for entities and that would touch deleted data
+		m_Chunks[i] = nullptr;  // Must zero out, because further chunk deletions query the chunkmap for entities and that would touch deleted data
 	}  // for i - m_Chunks[]
 }
 
@@ -2747,11 +2747,11 @@ cChunkPtr cChunkMap::cChunkLayer::GetChunk( int a_ChunkX, int a_ChunkZ)
 	if (!((LocalX < LAYER_SIZE) && (LocalZ < LAYER_SIZE) && (LocalX > -1) && (LocalZ > -1)))
 	{
 		ASSERT(!"Asking a cChunkLayer for a chunk that doesn't belong to it!");
-		return NULL;
+		return nullptr;
 	}
 	
 	int Index = LocalX + LocalZ * LAYER_SIZE;
-	if (m_Chunks[Index] == NULL)
+	if (m_Chunks[Index] == nullptr)
 	{
 		cChunk * neixm = (LocalX > 0)              ? m_Chunks[Index - 1]          : m_Parent->FindChunk(a_ChunkX - 1, a_ChunkZ);
 		cChunk * neixp = (LocalX < LAYER_SIZE - 1) ? m_Chunks[Index + 1]          : m_Parent->FindChunk(a_ChunkX + 1, a_ChunkZ);
@@ -2774,7 +2774,7 @@ cChunk * cChunkMap::cChunkLayer::FindChunk(int a_ChunkX, int a_ChunkZ)
 	if (!((LocalX < LAYER_SIZE) && (LocalZ < LAYER_SIZE) && (LocalX > -1) && (LocalZ > -1)))
 	{
 		ASSERT(!"Asking a cChunkLayer for a chunk that doesn't belong to it!");
-		return NULL;
+		return nullptr;
 	}
 	
 	int Index = LocalX + LocalZ * LAYER_SIZE;
@@ -2791,7 +2791,7 @@ void cChunkMap::cChunkLayer::CollectMobCensus(cMobCensus& a_ToFill)
 		// We do count every Mobs in the world. But we are assuming that every chunk not loaded by any client
 		// doesn't affect us. Normally they should not have mobs because every "too far" mobs despawn
 		// If they have (f.i. when player disconnect) we assume we don't have to make them live or despawn
-		if ((m_Chunks[i] != NULL) && m_Chunks[i]->IsValid() && m_Chunks[i]->HasAnyClients())
+		if ((m_Chunks[i] != nullptr) && m_Chunks[i]->IsValid() && m_Chunks[i]->HasAnyClients())
 		{
 			m_Chunks[i]->CollectMobCensus(a_ToFill);
 		}
@@ -2808,7 +2808,7 @@ void cChunkMap::cChunkLayer::SpawnMobs(cMobSpawner& a_MobSpawner)
 	for (size_t i = 0; i < ARRAYCOUNT(m_Chunks); i++)
 	{
 		// We only spawn close to players
-		if ((m_Chunks[i] != NULL) && m_Chunks[i]->IsValid() && m_Chunks[i]->HasAnyClients())
+		if ((m_Chunks[i] != nullptr) && m_Chunks[i]->IsValid() && m_Chunks[i]->HasAnyClients())
 		{
 			m_Chunks[i]->SpawnMobs(a_MobSpawner);
 		}
@@ -2824,7 +2824,7 @@ void cChunkMap::cChunkLayer::Tick(float a_Dt)
 	for (size_t i = 0; i < ARRAYCOUNT(m_Chunks); i++)
 	{
 		// Only tick chunks that are valid and should be ticked:
-		if ((m_Chunks[i] != NULL) && m_Chunks[i]->IsValid() && m_Chunks[i]->ShouldBeTicked())
+		if ((m_Chunks[i] != nullptr) && m_Chunks[i]->IsValid() && m_Chunks[i]->ShouldBeTicked())
 		{
 			m_Chunks[i]->Tick(a_Dt);
 		}
@@ -2839,7 +2839,7 @@ void cChunkMap::cChunkLayer::RemoveClient(cClientHandle * a_Client)
 {
 	for (size_t i = 0; i < ARRAYCOUNT(m_Chunks); i++)
 	{
-		if (m_Chunks[i] != NULL)
+		if (m_Chunks[i] != nullptr)
 		{
 			m_Chunks[i]->RemoveClient(a_Client);
 		}
@@ -2855,7 +2855,7 @@ bool cChunkMap::cChunkLayer::ForEachEntity(cEntityCallback & a_Callback)
 	// Calls the callback for each entity in the entire world; returns true if all entities processed, false if the callback aborted by returning true
 	for (size_t i = 0; i < ARRAYCOUNT(m_Chunks); i++)
 	{
-		if ((m_Chunks[i] != NULL) && m_Chunks[i]->IsValid())
+		if ((m_Chunks[i] != nullptr) && m_Chunks[i]->IsValid())
 		{
 			if (!m_Chunks[i]->ForEachEntity(a_Callback))
 			{
@@ -2875,7 +2875,7 @@ bool cChunkMap::cChunkLayer::DoWithEntityByID(int a_EntityID, cEntityCallback &
 	// Calls the callback if the entity with the specified ID is found, with the entity object as the callback param. Returns true if entity found.
 	for (size_t i = 0; i < ARRAYCOUNT(m_Chunks); i++)
 	{
-		if ((m_Chunks[i] != NULL) && m_Chunks[i]->IsValid())
+		if ((m_Chunks[i] != nullptr) && m_Chunks[i]->IsValid())
 		{
 			if (m_Chunks[i]->DoWithEntityByID(a_EntityID, a_Callback, a_CallbackReturn))
 			{
@@ -2894,7 +2894,7 @@ bool cChunkMap::cChunkLayer::HasEntity(int a_EntityID)
 {
 	for (size_t i = 0; i < ARRAYCOUNT(m_Chunks); i++)
 	{
-		if ((m_Chunks[i] != NULL) && m_Chunks[i]->IsValid())
+		if ((m_Chunks[i] != nullptr) && m_Chunks[i]->IsValid())
 		{
 			if (m_Chunks[i]->HasEntity(a_EntityID))
 			{
@@ -2914,7 +2914,7 @@ int cChunkMap::cChunkLayer::GetNumChunksLoaded(void) const
 	int NumChunks = 0;
 	for (size_t i = 0; i < ARRAYCOUNT(m_Chunks); ++i)
 	{
-		if (m_Chunks[i] != NULL)
+		if (m_Chunks[i] != nullptr)
 		{
 			NumChunks++;
 		}
@@ -2932,7 +2932,7 @@ void cChunkMap::cChunkLayer::GetChunkStats(int & a_NumChunksValid, int & a_NumCh
 	int NumDirty = 0;
 	for (size_t i = 0; i < ARRAYCOUNT(m_Chunks); ++i)
 	{
-		if (m_Chunks[i] == NULL)
+		if (m_Chunks[i] == nullptr)
 		{
 			continue;
 		}
@@ -2955,7 +2955,7 @@ void cChunkMap::cChunkLayer::Save(void)
 	cWorld * World = m_Parent->GetWorld();
 	for (size_t i = 0; i < ARRAYCOUNT(m_Chunks); ++i)
 	{
-		if ((m_Chunks[i] != NULL) && m_Chunks[i]->IsValid() && m_Chunks[i]->IsDirty())
+		if ((m_Chunks[i] != nullptr) && m_Chunks[i]->IsValid() && m_Chunks[i]->IsDirty())
 		{
 			World->GetStorage().QueueSaveChunk(m_Chunks[i]->GetPosX(), m_Chunks[i]->GetPosZ());
 		}
@@ -2971,7 +2971,7 @@ void cChunkMap::cChunkLayer::UnloadUnusedChunks(void)
 	for (size_t i = 0; i < ARRAYCOUNT(m_Chunks); i++)
 	{
 		if (
-			(m_Chunks[i] != NULL) &&   // Is valid
+			(m_Chunks[i] != nullptr) &&   // Is valid
 			(m_Chunks[i]->CanUnload()) &&  // Can unload
 			!cPluginManager::Get()->CallHookChunkUnloading(*(m_Parent->GetWorld()), m_Chunks[i]->GetPosX(), m_Chunks[i]->GetPosZ())  // Plugins agree
 		)
@@ -2980,7 +2980,7 @@ void cChunkMap::cChunkLayer::UnloadUnusedChunks(void)
 			// so we still need to be able to return the chunk. Therefore we first delete, then NULLify
 			// Doing otherwise results in bug http://forum.mc-server.org/showthread.php?tid=355
 			delete m_Chunks[i];
-			m_Chunks[i] = NULL;
+			m_Chunks[i] = nullptr;
 		}
 	}  // for i - m_Chunks[]
 }
@@ -3033,7 +3033,7 @@ void cChunkMap::AddChunkStay(cChunkStay & a_ChunkStay)
 	for (cChunkCoordsVector::const_iterator itr = WantedChunks.begin(); itr != WantedChunks.end(); ++itr)
 	{
 		cChunkPtr Chunk = GetChunk(itr->m_ChunkX, itr->m_ChunkZ);
-		if (Chunk == NULL)
+		if (Chunk == nullptr)
 		{
 			continue;
 		}
@@ -3082,7 +3082,7 @@ void cChunkMap::DelChunkStay(cChunkStay & a_ChunkStay)
 	for (cChunkCoordsVector::const_iterator itr = Chunks.begin(), end = Chunks.end(); itr != end; ++itr)
 	{
 		cChunkPtr Chunk = GetChunkNoLoad(itr->m_ChunkX, itr->m_ChunkZ);
-		if (Chunk == NULL)
+		if (Chunk == nullptr)
 		{
 			continue;
 		}
diff --git a/src/ChunkMap.h b/src/ChunkMap.h
index 38e7f4052..51be5cb3d 100644
--- a/src/ChunkMap.h
+++ b/src/ChunkMap.h
@@ -70,29 +70,29 @@ public:
 	// Broadcast respective packets to all clients of the chunk where the event is taking place
 	// (Please keep these alpha-sorted)
 	void BroadcastAttachEntity(const cEntity & a_Entity, const cEntity * a_Vehicle);
-	void BroadcastBlockAction(int a_BlockX, int a_BlockY, int a_BlockZ, char a_Byte1, char a_Byte2, BLOCKTYPE a_BlockType, const cClientHandle * a_Exclude = NULL);
-	void BroadcastBlockBreakAnimation(int a_entityID, int a_blockX, int a_blockY, int a_blockZ, char a_stage, const cClientHandle * a_Exclude = NULL);
+	void BroadcastBlockAction(int a_BlockX, int a_BlockY, int a_BlockZ, char a_Byte1, char a_Byte2, BLOCKTYPE a_BlockType, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastBlockBreakAnimation(int a_entityID, int a_blockX, int a_blockY, int a_blockZ, char a_stage, const cClientHandle * a_Exclude = nullptr);
 	void BroadcastBlockEntity(int a_BlockX, int a_BlockY, int a_BlockZ, const cClientHandle * a_Exclude);
-	void BroadcastChunkData(int a_ChunkX, int a_ChunkZ, cChunkDataSerializer & a_Serializer, const cClientHandle * a_Exclude = NULL);
-	void BroadcastCollectEntity(const cEntity & a_Entity, const cPlayer & a_Player, const cClientHandle * a_Exclude = NULL);
-	void BroadcastCollectPickup(const cPickup & a_Pickup, const cPlayer & a_Player, const cClientHandle * a_Exclude = NULL);
-	void BroadcastDestroyEntity(const cEntity & a_Entity, const cClientHandle * a_Exclude = NULL);
-	void BroadcastEntityEffect(const cEntity & a_Entity, int a_EffectID, int a_Amplifier, short a_Duration, const cClientHandle * a_Exclude = NULL);
-	void BroadcastEntityEquipment(const cEntity & a_Entity, short a_SlotNum, const cItem & a_Item, const cClientHandle * a_Exclude = NULL);
-	void BroadcastEntityHeadLook(const cEntity & a_Entity, const cClientHandle * a_Exclude = NULL);
-	void BroadcastEntityLook(const cEntity & a_Entity, const cClientHandle * a_Exclude = NULL);
-	void BroadcastEntityMetadata(const cEntity & a_Entity, const cClientHandle * a_Exclude = NULL);
-	void BroadcastEntityRelMove(const cEntity & a_Entity, char a_RelX, char a_RelY, char a_RelZ, const cClientHandle * a_Exclude = NULL);
-	void BroadcastEntityRelMoveLook(const cEntity & a_Entity, char a_RelX, char a_RelY, char a_RelZ, const cClientHandle * a_Exclude = NULL);
-	void BroadcastEntityStatus(const cEntity & a_Entity, char a_Status, const cClientHandle * a_Exclude = NULL);
-	void BroadcastEntityVelocity(const cEntity & a_Entity, const cClientHandle * a_Exclude = NULL);
-	void BroadcastEntityAnimation(const cEntity & a_Entity, char a_Animation, const cClientHandle * a_Exclude = NULL);
-	void BroadcastParticleEffect(const AString & a_ParticleName, float a_SrcX, float a_SrcY, float a_SrcZ, float a_OffsetX, float a_OffsetY, float a_OffsetZ, float a_ParticleData, int a_ParticleAmount, cClientHandle * a_Exclude = NULL);
-	void BroadcastRemoveEntityEffect (const cEntity & a_Entity, int a_EffectID, const cClientHandle * a_Exclude = NULL);
-	void BroadcastSoundEffect(const AString & a_SoundName, double a_X, double a_Y, double a_Z, float a_Volume, float a_Pitch, const cClientHandle * a_Exclude = NULL);
-	void BroadcastSoundParticleEffect(int a_EffectID, int a_SrcX, int a_SrcY, int a_SrcZ, int a_Data, const cClientHandle * a_Exclude = NULL);
-	void BroadcastSpawnEntity(cEntity & a_Entity, const cClientHandle * a_Exclude = NULL);
-	void BroadcastThunderbolt(int a_BlockX, int a_BlockY, int a_BlockZ, const cClientHandle * a_Exclude = NULL);
+	void BroadcastChunkData(int a_ChunkX, int a_ChunkZ, cChunkDataSerializer & a_Serializer, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastCollectEntity(const cEntity & a_Entity, const cPlayer & a_Player, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastCollectPickup(const cPickup & a_Pickup, const cPlayer & a_Player, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastDestroyEntity(const cEntity & a_Entity, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastEntityEffect(const cEntity & a_Entity, int a_EffectID, int a_Amplifier, short a_Duration, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastEntityEquipment(const cEntity & a_Entity, short a_SlotNum, const cItem & a_Item, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastEntityHeadLook(const cEntity & a_Entity, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastEntityLook(const cEntity & a_Entity, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastEntityMetadata(const cEntity & a_Entity, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastEntityRelMove(const cEntity & a_Entity, char a_RelX, char a_RelY, char a_RelZ, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastEntityRelMoveLook(const cEntity & a_Entity, char a_RelX, char a_RelY, char a_RelZ, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastEntityStatus(const cEntity & a_Entity, char a_Status, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastEntityVelocity(const cEntity & a_Entity, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastEntityAnimation(const cEntity & a_Entity, char a_Animation, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastParticleEffect(const AString & a_ParticleName, float a_SrcX, float a_SrcY, float a_SrcZ, float a_OffsetX, float a_OffsetY, float a_OffsetZ, float a_ParticleData, int a_ParticleAmount, cClientHandle * a_Exclude = nullptr);
+	void BroadcastRemoveEntityEffect (const cEntity & a_Entity, int a_EffectID, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastSoundEffect(const AString & a_SoundName, double a_X, double a_Y, double a_Z, float a_Volume, float a_Pitch, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastSoundParticleEffect(int a_EffectID, int a_SrcX, int a_SrcY, int a_SrcZ, int a_Data, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastSpawnEntity(cEntity & a_Entity, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastThunderbolt(int a_BlockX, int a_BlockY, int a_BlockZ, const cClientHandle * a_Exclude = nullptr);
 	void BroadcastUseBed(const cEntity & a_Entity, int a_BlockX, int a_BlockY, int a_BlockZ);
 	
 	/** Sends the block entity, if it is at the coords specified, to a_Client */
@@ -368,7 +368,7 @@ private:
 		/** Always returns an assigned chunkptr, but the chunk needn't be valid (loaded / generated) - callers must check */
 		cChunkPtr GetChunk( int a_ChunkX, int a_ChunkZ);
 		
-		/** Returns the specified chunk, or NULL if not created yet */
+		/** Returns the specified chunk, or nullptr if not created yet */
 		cChunk * FindChunk(int a_ChunkX, int a_ChunkZ);
 		
 		int GetX(void) const {return m_LayerX; }
@@ -431,10 +431,10 @@ private:
 	
 	typedef std::list<cChunkStay *> cChunkStays;
 
-	/** Finds the cChunkLayer object responsible for the specified chunk; returns NULL if not found. Assumes m_CSLayers is locked. */
+	/** Finds the cChunkLayer object responsible for the specified chunk; returns nullptr if not found. Assumes m_CSLayers is locked. */
 	cChunkLayer * FindLayerForChunk(int a_ChunkX, int a_ChunkZ);
 	
-	/** Returns the specified cChunkLayer object; returns NULL if not found. Assumes m_CSLayers is locked. */
+	/** Returns the specified cChunkLayer object; returns nullptr if not found. Assumes m_CSLayers is locked. */
 	cChunkLayer * FindLayer(int a_LayerX, int a_LayerZ);
 	
 	/** Returns the cChunkLayer object responsible for the specified chunk; creates it if not found. */
diff --git a/src/ChunkSender.cpp b/src/ChunkSender.cpp
index a3151eb3f..c94004780 100644
--- a/src/ChunkSender.cpp
+++ b/src/ChunkSender.cpp
@@ -35,9 +35,9 @@ void cNotifyChunkSender::Call(int a_ChunkX, int a_ChunkZ)
 
 cChunkSender::cChunkSender(void) :
 	super("ChunkSender"),
-	m_World(NULL),
+	m_World(nullptr),
 	m_RemoveCount(0),
-	m_Notify(NULL)
+	m_Notify(nullptr)
 {
 	m_Notify.SetChunkSender(this);
 }
@@ -93,7 +93,7 @@ void cChunkSender::ChunkReady(int a_ChunkX, int a_ChunkZ)
 
 void cChunkSender::QueueSendChunkTo(int a_ChunkX, int a_ChunkZ, cClientHandle * a_Client)
 {
-	ASSERT(a_Client != NULL);
+	ASSERT(a_Client != nullptr);
 	{
 		cCSLock Lock(m_CS);
 		if (std::find(m_SendChunks.begin(), m_SendChunks.end(), sSendChunk(a_ChunkX, a_ChunkZ, a_Client)) != m_SendChunks.end())
@@ -161,7 +161,7 @@ void cChunkSender::Execute(void)
 			m_ChunksReady.pop_front();
 			Lock.Unlock();
 			
-			SendChunk(Coords.m_ChunkX, Coords.m_ChunkZ, NULL);
+			SendChunk(Coords.m_ChunkX, Coords.m_ChunkZ, nullptr);
 		}
 		else
 		{
@@ -189,10 +189,10 @@ void cChunkSender::Execute(void)
 
 void cChunkSender::SendChunk(int a_ChunkX, int a_ChunkZ, cClientHandle * a_Client)
 {
-	ASSERT(m_World != NULL);
+	ASSERT(m_World != nullptr);
 	
 	// Ask the client if it still wants the chunk:
-	if (a_Client != NULL)
+	if (a_Client != nullptr)
 	{
 		if (!a_Client->WantsSendChunk(a_ChunkX, a_ChunkZ))
 		{
@@ -227,7 +227,7 @@ void cChunkSender::SendChunk(int a_ChunkX, int a_ChunkZ, cClientHandle * a_Clien
 	cChunkDataSerializer Data(m_BlockTypes, m_BlockMetas, m_BlockLight, m_BlockSkyLight, m_BiomeMap);
 	
 	// Send:
-	if (a_Client == NULL)
+	if (a_Client == nullptr)
 	{
 		m_World->BroadcastChunkData(a_ChunkX, a_ChunkZ, Data);
 	}
@@ -239,7 +239,7 @@ void cChunkSender::SendChunk(int a_ChunkX, int a_ChunkZ, cClientHandle * a_Clien
 	// Send block-entity packets:
 	for (sBlockCoords::iterator itr = m_BlockEntities.begin(); itr != m_BlockEntities.end(); ++itr)
 	{
-		if (a_Client == NULL)
+		if (a_Client == nullptr)
 		{
 			m_World->BroadcastBlockEntity(itr->m_BlockX, itr->m_BlockY, itr->m_BlockZ);
 		}
diff --git a/src/ChunkSender.h b/src/ChunkSender.h
index a0e9087a9..f17029aea 100644
--- a/src/ChunkSender.h
+++ b/src/ChunkSender.h
@@ -158,7 +158,7 @@ protected:
 	virtual void Entity       (cEntity *      a_Entity) override;
 	virtual void BlockEntity  (cBlockEntity * a_Entity) override;
 
-	/// Sends the specified chunk to a_Client, or to all chunk clients if a_Client == NULL
+	/// Sends the specified chunk to a_Client, or to all chunk clients if a_Client == nullptr
 	void SendChunk(int a_ChunkX, int a_ChunkZ, cClientHandle * a_Client);
 } ;
 
diff --git a/src/ChunkStay.cpp b/src/ChunkStay.cpp
index 38aa89a37..0772787de 100644
--- a/src/ChunkStay.cpp
+++ b/src/ChunkStay.cpp
@@ -12,7 +12,7 @@
 
 
 cChunkStay::cChunkStay(void) :
-	m_ChunkMap(NULL)
+	m_ChunkMap(nullptr)
 {
 }
 
@@ -31,7 +31,7 @@ cChunkStay::~cChunkStay()
 
 void cChunkStay::Clear(void)
 {
-	ASSERT(m_ChunkMap == NULL);
+	ASSERT(m_ChunkMap == nullptr);
 	m_Chunks.clear();
 }
 
@@ -41,7 +41,7 @@ void cChunkStay::Clear(void)
 
 void cChunkStay::Add(int a_ChunkX, int a_ChunkZ)
 {
-	ASSERT(m_ChunkMap == NULL);
+	ASSERT(m_ChunkMap == nullptr);
 
 	for (cChunkCoordsVector::const_iterator itr = m_Chunks.begin(); itr != m_Chunks.end(); ++itr)
 	{
@@ -60,7 +60,7 @@ void cChunkStay::Add(int a_ChunkX, int a_ChunkZ)
 
 void cChunkStay::Remove(int a_ChunkX, int a_ChunkZ)
 {
-	ASSERT(m_ChunkMap == NULL);
+	ASSERT(m_ChunkMap == nullptr);
 
 	for (cChunkCoordsVector::iterator itr = m_Chunks.begin(); itr != m_Chunks.end(); ++itr)
 	{
@@ -79,7 +79,7 @@ void cChunkStay::Remove(int a_ChunkX, int a_ChunkZ)
 
 void cChunkStay::Enable(cChunkMap & a_ChunkMap)
 {
-	ASSERT(m_ChunkMap == NULL);
+	ASSERT(m_ChunkMap == nullptr);
 	
 	m_OutstandingChunks = m_Chunks;
 	m_ChunkMap = &a_ChunkMap;
@@ -92,10 +92,10 @@ void cChunkStay::Enable(cChunkMap & a_ChunkMap)
 
 void cChunkStay::Disable(void)
 {
-	ASSERT(m_ChunkMap != NULL);
+	ASSERT(m_ChunkMap != nullptr);
 	
 	cChunkMap * ChunkMap = m_ChunkMap;
-	m_ChunkMap = NULL;
+	m_ChunkMap = nullptr;
 	ChunkMap->DelChunkStay(*this);
 }
 
diff --git a/src/ClientHandle.cpp b/src/ClientHandle.cpp
index f15d845ef..a83561838 100644
--- a/src/ClientHandle.cpp
+++ b/src/ClientHandle.cpp
@@ -68,7 +68,7 @@ cClientHandle::cClientHandle(const cSocket * a_Socket, int a_ViewDistance) :
 	m_ViewDistance(a_ViewDistance),
 	m_IPString(a_Socket->GetIPString()),
 	m_OutgoingData(64 KiB),
-	m_Player(NULL),
+	m_Player(nullptr),
 	m_HasSentDC(false),
 	m_LastStreamedChunkX(0x7fffffff),  // bogus chunk coords to force streaming upon login
 	m_LastStreamedChunkZ(0x7fffffff),
@@ -122,10 +122,10 @@ cClientHandle::~cClientHandle()
 		m_ChunksToSend.clear();
 	}
 
-	if (m_Player != NULL)
+	if (m_Player != nullptr)
 	{
 		cWorld * World = m_Player->GetWorld();
-		if (World != NULL)
+		if (World != nullptr)
 		{
 			if (!m_Username.empty())
 			{
@@ -137,7 +137,7 @@ cClientHandle::~cClientHandle()
 			m_Player->Destroy();
 		}
 		delete m_Player;
-		m_Player = NULL;
+		m_Player = nullptr;
 	}
 
 	if (!m_HasSentDC)
@@ -149,7 +149,7 @@ cClientHandle::~cClientHandle()
 	cRoot::Get()->GetServer()->RemoveClient(this);
 	
 	delete m_Protocol;
-	m_Protocol = NULL;
+	m_Protocol = nullptr;
 	
 	LOGD("ClientHandle at %p deleted", this);
 }
@@ -173,7 +173,7 @@ void cClientHandle::Destroy(void)
 	// DEBUG:
 	LOGD("%s: client %p, \"%s\"", __FUNCTION__, this, m_Username.c_str());
 	
-	if ((m_Player != NULL) && (m_Player->GetWorld() != NULL))
+	if ((m_Player != nullptr) && (m_Player->GetWorld() != nullptr))
 	{
 		RemoveFromAllChunks();
 		m_Player->GetWorld()->RemoveClientFromChunkSender(this);
@@ -314,7 +314,7 @@ void cClientHandle::Authenticate(const AString & a_Name, const AString & a_UUID,
 		return;
 	}
 	
-	ASSERT(m_Player == NULL);
+	ASSERT(m_Player == nullptr);
 
 	m_Username = a_Name;
 	
@@ -335,7 +335,7 @@ void cClientHandle::Authenticate(const AString & a_Name, const AString & a_UUID,
 	m_Player = new cPlayer(this, GetUsername());
 
 	cWorld * World = cRoot::Get()->GetWorld(m_Player->GetLoadedWorldName());
-	if (World == NULL)
+	if (World == nullptr)
 	{
 		World = cRoot::Get()->GetDefaultWorld();
 	}
@@ -412,7 +412,7 @@ void cClientHandle::StreamChunks(void)
 		return;
 	}
 
-	ASSERT(m_Player != NULL);
+	ASSERT(m_Player != nullptr);
 
 	int ChunkPosX = FAST_FLOOR_DIV((int)m_Player->GetPosX(), cChunkDef::Width);
 	int ChunkPosZ = FAST_FLOOR_DIV((int)m_Player->GetPosZ(), cChunkDef::Width);
@@ -427,7 +427,7 @@ void cClientHandle::StreamChunks(void)
 	LOGD("Streaming chunks centered on [%d, %d], view distance %d", ChunkPosX, ChunkPosZ, m_ViewDistance);
 	
 	cWorld * World = m_Player->GetWorld();
-	ASSERT(World != NULL);
+	ASSERT(World != nullptr);
 
 	// Remove all loaded chunks that are no longer in range; deferred to out-of-CS:
 	cChunkCoordsList RemoveChunks;
@@ -513,7 +513,7 @@ void cClientHandle::StreamChunk(int a_ChunkX, int a_ChunkZ)
 	}
 	
 	cWorld * World = m_Player->GetWorld();
-	ASSERT(World != NULL);
+	ASSERT(World != nullptr);
 
 	if (World->AddChunkClient(a_ChunkX, a_ChunkZ, this))
 	{
@@ -534,7 +534,7 @@ void cClientHandle::StreamChunk(int a_ChunkX, int a_ChunkZ)
 void cClientHandle::RemoveFromAllChunks()
 {
 	cWorld * World = m_Player->GetWorld();
-	if (World != NULL)
+	if (World != nullptr)
 	{
 		World->RemoveClientFromChunks(this);
 	}
@@ -650,7 +650,7 @@ void cClientHandle::HandlePlayerAbilities(bool a_CanFly, bool a_IsFlying, float
 
 void cClientHandle::HandlePlayerPos(double a_PosX, double a_PosY, double a_PosZ, double a_Stance, bool a_IsOnGround)
 {
-	if ((m_Player == NULL) || (m_State != csPlaying))
+	if ((m_Player == nullptr) || (m_State != csPlaying))
 	{
 		// The client hasn't been spawned yet and sends nonsense, we know better
 		return;
@@ -784,7 +784,7 @@ void cClientHandle::UnregisterPluginChannels(const AStringVector & a_ChannelList
 void cClientHandle::HandleBeaconSelection(int a_PrimaryEffect, int a_SecondaryEffect)
 {
 	cWindow * Window = m_Player->GetWindow();
-	if ((Window == NULL) || (Window->GetWindowType() != cWindow::wtBeacon))
+	if ((Window == nullptr) || (Window->GetWindowType() != cWindow::wtBeacon))
 	{
 		return;
 	}
@@ -860,7 +860,7 @@ void cClientHandle::HandleCommandBlockEntityChange(int a_EntityID, const AString
 
 void cClientHandle::HandleAnvilItemName(const AString & a_ItemName)
 {
-	if ((m_Player->GetWindow() == NULL) || (m_Player->GetWindow()->GetWindowType() != cWindow::wtAnvil))
+	if ((m_Player->GetWindow() == nullptr) || (m_Player->GetWindow()->GetWindowType() != cWindow::wtAnvil))
 	{
 		return;
 	}
@@ -1497,7 +1497,7 @@ void cClientHandle::HandleChat(const AString & a_Message)
 
 void cClientHandle::HandlePlayerLook(float a_Rotation, float a_Pitch, bool a_IsOnGround)
 {
-	if ((m_Player == NULL) || (m_State != csPlaying))
+	if ((m_Player == nullptr) || (m_State != csPlaying))
 	{
 		return;
 	}
@@ -1597,7 +1597,7 @@ void cClientHandle::HandleWindowClick(char a_WindowID, short a_SlotNum, eClickAc
 	);
 	
 	cWindow * Window = m_Player->GetWindow();
-	if (Window == NULL)
+	if (Window == nullptr)
 	{
 		LOGWARNING("Player \"%s\" clicked in a non-existent window. Ignoring", m_Username.c_str());
 		return;
@@ -1689,7 +1689,7 @@ void cClientHandle::HandleUseEntity(int a_TargetEntityID, bool a_IsLeftClick)
 
 void cClientHandle::HandleRespawn(void)
 {
-	if (m_Player == NULL)
+	if (m_Player == nullptr)
 	{
 		Destroy();
 		return;
@@ -1779,7 +1779,7 @@ void cClientHandle::HandleEntitySprinting(int a_EntityID, bool a_IsSprinting)
 
 void cClientHandle::HandleUnmount(void)
 {
-	if (m_Player == NULL)
+	if (m_Player == nullptr)
 	{
 		return;
 	}
@@ -1884,8 +1884,8 @@ void cClientHandle::RemoveFromWorld(void)
 
 bool cClientHandle::CheckBlockInteractionsRate(void)
 {
-	ASSERT(m_Player != NULL);
-	ASSERT(m_Player->GetWorld() != NULL);
+	ASSERT(m_Player != nullptr);
+	ASSERT(m_Player->GetWorld() != nullptr);
 
 	if (m_NumBlockChangeInteractionsThisTick > MAX_BLOCK_CHANGE_INTERACTIONS)
 	{
@@ -1916,7 +1916,7 @@ void cClientHandle::Tick(float a_Dt)
 		Destroy();
 	}
 	
-	if (m_Player == NULL)
+	if (m_Player == nullptr)
 	{
 		return;
 	}
@@ -2067,10 +2067,10 @@ void cClientHandle::SendBlockChanges(int a_ChunkX, int a_ChunkZ, const sSetBlock
 void cClientHandle::SendChat(const AString & a_Message, eMessageType a_ChatPrefix, const AString & a_AdditionalData)
 {
 	cWorld * World = GetPlayer()->GetWorld();
-	if (World == NULL)
+	if (World == nullptr)
 	{
 		World = cRoot::Get()->GetWorld(GetPlayer()->GetLoadedWorldName());
-		if (World == NULL)
+		if (World == nullptr)
 		{
 			World = cRoot::Get()->GetDefaultWorld();
 		}
@@ -2095,7 +2095,7 @@ void cClientHandle::SendChat(const cCompositeChat & a_Message)
 
 void cClientHandle::SendChunkData(int a_ChunkX, int a_ChunkZ, cChunkDataSerializer & a_Serializer)
 {
-	ASSERT(m_Player != NULL);
+	ASSERT(m_Player != nullptr);
 	
 	// Check chunks being sent, erase them from m_ChunksToSend:
 	bool Found = false;
@@ -2926,7 +2926,7 @@ void cClientHandle::HandleEnchantItem(Byte & a_WindowID, Byte & a_Enchantment)
 	}
 
 	if (
-		(m_Player->GetWindow() == NULL) ||
+		(m_Player->GetWindow() == nullptr) ||
 		(m_Player->GetWindow()->GetWindowID() != a_WindowID) ||
 		(m_Player->GetWindow()->GetWindowType() != cWindow::wtEnchantment)
 	)
diff --git a/src/CraftingRecipes.cpp b/src/CraftingRecipes.cpp
index 0828a6c74..64fb21181 100644
--- a/src/CraftingRecipes.cpp
+++ b/src/CraftingRecipes.cpp
@@ -59,7 +59,7 @@ cCraftingGrid::cCraftingGrid(const cCraftingGrid & a_Original) :
 cCraftingGrid::~cCraftingGrid()
 {
 	delete[] m_Items;
-	m_Items = NULL;
+	m_Items = nullptr;
 }
 
 
@@ -291,7 +291,7 @@ void cCraftingRecipes::GetRecipe(cPlayer & a_Player, cCraftingGrid & a_CraftingG
 	// Built-in recipes:
 	std::auto_ptr<cRecipe> Recipe(FindRecipe(a_CraftingGrid.GetItems(), a_CraftingGrid.GetWidth(), a_CraftingGrid.GetHeight()));
 	a_Recipe.Clear();
-	if (Recipe.get() == NULL)
+	if (Recipe.get() == nullptr)
 	{
 		// Allow plugins to intercept a no-recipe-found situation:
 		cRoot::Get()->GetPluginManager()->CallHookCraftingNoRecipe(a_Player, a_CraftingGrid, &a_Recipe);
@@ -603,9 +603,9 @@ cCraftingRecipes::cRecipe * cCraftingRecipes::FindRecipe(const cItem * a_Craftin
 	// Search in the possibly minimized grid, but keep the stride:
 	const cItem * Grid = a_CraftingGrid + GridLeft + (a_GridWidth * GridTop);
 	cRecipe * Recipe = FindRecipeCropped(Grid, GridWidth, GridHeight, a_GridWidth);
-	if (Recipe == NULL)
+	if (Recipe == nullptr)
 	{
-		return NULL;
+		return nullptr;
 	}
 	
 	// A recipe has been found, move it to correspond to the original crafting grid:
@@ -637,7 +637,7 @@ cCraftingRecipes::cRecipe * cCraftingRecipes::FindRecipeCropped(const cItem * a_
 		for (int x = 0; x <= MaxOfsX; x++) for (int y = 0; y <= MaxOfsY; y++)
 		{
 			cRecipe * Recipe = MatchRecipe(a_CraftingGrid, a_GridWidth, a_GridHeight, a_GridStride, *itr, x, y);
-			if (Recipe != NULL)
+			if (Recipe != nullptr)
 			{
 				return Recipe;
 			}
@@ -645,7 +645,7 @@ cCraftingRecipes::cRecipe * cCraftingRecipes::FindRecipeCropped(const cItem * a_
 	}  // for itr - m_Recipes[]
 	
 	// No matching recipe found
-	return NULL;
+	return nullptr;
 }
 
 
@@ -681,7 +681,7 @@ cCraftingRecipes::cRecipe * cCraftingRecipes::MatchRecipe(const cItem * a_Crafti
 		)
 		{
 			// Doesn't match
-			return NULL;
+			return nullptr;
 		}
 		HasMatched[itrS->x + a_OffsetX][itrS->y + a_OffsetY] = true;
 	}  // for itrS - Recipe->m_Ingredients[]
@@ -743,7 +743,7 @@ cCraftingRecipes::cRecipe * cCraftingRecipes::MatchRecipe(const cItem * a_Crafti
 		}  // for x
 		if (!Found)
 		{
-			return NULL;
+			return nullptr;
 		}
 	}  // for itrS - a_Recipe->m_Ingredients[]
 	
@@ -753,7 +753,7 @@ cCraftingRecipes::cRecipe * cCraftingRecipes::MatchRecipe(const cItem * a_Crafti
 		if (!HasMatched[x][y] && !a_CraftingGrid[x + a_GridStride * y].IsEmpty())
 		{
 			// There's an unmatched item in the grid
-			return NULL;
+			return nullptr;
 		}
 	}  // for y, for x
 	
diff --git a/src/CraftingRecipes.h b/src/CraftingRecipes.h
index 5ebabe098..44444d42e 100644
--- a/src/CraftingRecipes.h
+++ b/src/CraftingRecipes.h
@@ -157,13 +157,13 @@ protected:
 	/// Moves the recipe to top-left corner, sets its MinWidth / MinHeight
 	void NormalizeIngredients(cRecipe * a_Recipe);
 	
-	/// Finds a recipe matching the crafting grid. Returns a newly allocated recipe (with all its coords set) or NULL if not found. Caller must delete return value!
+	/// Finds a recipe matching the crafting grid. Returns a newly allocated recipe (with all its coords set) or nullptr if not found. Caller must delete return value!
 	cRecipe * FindRecipe(const cItem * a_CraftingGrid, int a_GridWidth, int a_GridHeight);
 	
 	/// Same as FindRecipe, but the grid is guaranteed to be of minimal dimensions needed
 	cRecipe * FindRecipeCropped(const cItem * a_CraftingGrid, int a_GridWidth, int a_GridHeight, int a_GridStride);
 	
-	/// Checks if the grid matches the specified recipe, offset by the specified offsets. Returns a matched cRecipe * if so, or NULL if not matching. Caller must delete the return value!
+	/// Checks if the grid matches the specified recipe, offset by the specified offsets. Returns a matched cRecipe * if so, or nullptr if not matching. Caller must delete the return value!
 	cRecipe * MatchRecipe(const cItem * a_CraftingGrid, int a_GridWidth, int a_GridHeight, int a_GridStride, const cRecipe * a_Recipe, int a_OffsetX, int a_OffsetY);
 
 	/** Searches for anything firework related, and does the data setting if appropriate */
diff --git a/src/Defines.h b/src/Defines.h
index f1ff911e7..c2f46c241 100644
--- a/src/Defines.h
+++ b/src/Defines.h
@@ -477,16 +477,16 @@ inline void AddFaceDirection(int & a_BlockX, unsigned char & a_BlockY, int & a_B
 
 
 
-#define PI 3.14159265358979323846264338327950288419716939937510582097494459072381640628620899862803482534211706798f
+
 
 inline void EulerToVector(double a_Pan, double a_Pitch, double & a_X, double & a_Y, double & a_Z)
 {
 	// 	a_X = sinf ( a_Pan / 180 * PI) * cosf ( a_Pitch / 180 * PI);
 	// 	a_Y = -sinf ( a_Pitch / 180 * PI);
 	// 	a_Z = -cosf ( a_Pan / 180 * PI) * cosf ( a_Pitch / 180 * PI);
-	a_X = cos(a_Pan / 180 * PI) * cos(a_Pitch / 180 * PI);
-	a_Y = sin(a_Pan / 180 * PI) * cos(a_Pitch / 180 * PI);
-	a_Z = sin(a_Pitch / 180 * PI);
+	a_X = cos(a_Pan / 180 * M_PI) * cos(a_Pitch / 180 * M_PI);
+	a_Y = sin(a_Pan / 180 * M_PI) * cos(a_Pitch / 180 * M_PI);
+	a_Z = sin(a_Pitch / 180 * M_PI);
 }
 
 
@@ -502,10 +502,10 @@ inline void VectorToEuler(double a_X, double a_Y, double a_Z, double & a_Pan, do
 	}
 	else
 	{
-		a_Pan = atan2(a_Z, a_X) * 180 / PI - 90;
+		a_Pan = atan2(a_Z, a_X) * 180 / M_PI - 90;
 	}
 
-	a_Pitch = atan2(a_Y, r) * 180 / PI;
+	a_Pitch = atan2(a_Y, r) * 180 / M_PI;
 }
 
 
diff --git a/src/Entities/ArrowEntity.cpp b/src/Entities/ArrowEntity.cpp
index 7e429c62e..30f18f677 100644
--- a/src/Entities/ArrowEntity.cpp
+++ b/src/Entities/ArrowEntity.cpp
@@ -217,7 +217,7 @@ void cArrowEntity::Tick(float a_Dt, cChunk & a_Chunk)
 		int RelPosZ = m_HitBlockPos.z - a_Chunk.GetPosZ() * cChunkDef::Width;
 		cChunk * Chunk = a_Chunk.GetRelNeighborChunkAdjustCoords(RelPosX, RelPosZ);
 		
-		if (Chunk == NULL)
+		if (Chunk == nullptr)
 		{
 			// Inside an unloaded chunk, abort
 			return;
diff --git a/src/Entities/Boat.cpp b/src/Entities/Boat.cpp
index 328a70846..953213bca 100644
--- a/src/Entities/Boat.cpp
+++ b/src/Entities/Boat.cpp
@@ -42,7 +42,7 @@ bool cBoat::DoTakeDamage(TakeDamageInfo & TDI)
 
 	if (GetHealth() == 0)
 	{
-		if (TDI.Attacker != NULL)
+		if (TDI.Attacker != nullptr)
 		{
 			if (TDI.Attacker->IsPlayer())
 			{
@@ -64,7 +64,7 @@ void cBoat::OnRightClicked(cPlayer & a_Player)
 {
 	super::OnRightClicked(a_Player);
 
-	if (m_Attachee != NULL)
+	if (m_Attachee != nullptr)
 	{
 		if (m_Attachee->GetUniqueID() == a_Player.GetUniqueID())
 		{
diff --git a/src/Entities/Entity.cpp b/src/Entities/Entity.cpp
index da85dec50..afc61c73f 100644
--- a/src/Entities/Entity.cpp
+++ b/src/Entities/Entity.cpp
@@ -29,8 +29,8 @@ cEntity::cEntity(eEntityType a_EntityType, double a_X, double a_Y, double a_Z, d
 	: m_UniqueID(0)
 	, m_Health(1)
 	, m_MaxHealth(1)
-	, m_AttachedTo(NULL)
-	, m_Attachee(NULL)
+	, m_AttachedTo(nullptr)
+	, m_Attachee(nullptr)
 	, m_bDirtyHead(true)
 	, m_bDirtyOrientation(true)
 	, m_bHasSentNoSpeed(true)
@@ -38,9 +38,9 @@ cEntity::cEntity(eEntityType a_EntityType, double a_X, double a_Y, double a_Z, d
 	, m_Gravity(-9.81f)
 	, m_LastPos(a_X, a_Y, a_Z)
 	, m_IsInitialized(false)
-	, m_WorldTravellingFrom(NULL)
+	, m_WorldTravellingFrom(nullptr)
 	, m_EntityType(a_EntityType)
-	, m_World(NULL)
+	, m_World(nullptr)
 	, m_IsFireproof(false)
 	, m_TicksSinceLastBurnDamage(0)
 	, m_TicksSinceLastLavaDamage(0)
@@ -73,7 +73,7 @@ cEntity::cEntity(eEntityType a_EntityType, double a_X, double a_Y, double a_Z, d
 cEntity::~cEntity()
 {
 	// Before deleting, the entity needs to have been removed from the world, if ever added
-	ASSERT((m_World == NULL) || !m_World->HasEntity(m_UniqueID));
+	ASSERT((m_World == nullptr) || !m_World->HasEntity(m_UniqueID));
 	
 	/*
 	// DEBUG:
@@ -85,11 +85,11 @@ cEntity::~cEntity()
 		);
 	*/
 	
-	if (m_AttachedTo != NULL)
+	if (m_AttachedTo != nullptr)
 	{
 		Detach();
 	}
-	if (m_Attachee != NULL)
+	if (m_Attachee != nullptr)
 	{
 		m_Attachee->Detach();
 	}
@@ -242,7 +242,7 @@ void cEntity::TakeDamage(eDamageType a_DamageType, cEntity * a_Attacker, int a_R
 	TDI.FinalDamage = a_FinalDamage;
 	
 	Vector3d Heading(0, 0, 0);
-	if (a_Attacker != NULL)
+	if (a_Attacker != nullptr)
 	{
 		Heading = a_Attacker->GetLookVector() * (a_Attacker->IsSprinting() ? 16 : 11);
 		Heading.y = 1.6;
@@ -265,7 +265,7 @@ void cEntity::SetYawFromSpeed(void)
 		SetYaw(0);
 		return;
 	}
-	SetYaw(atan2(m_Speed.x, m_Speed.z) * 180 / PI);
+	SetYaw(atan2(m_Speed.x, m_Speed.z) * 180 / M_PI);
 }
 
 
@@ -282,7 +282,7 @@ void cEntity::SetPitchFromSpeed(void)
 		SetPitch(0);
 		return;
 	}
-	SetPitch(atan2(m_Speed.y, xz) * 180 / PI);
+	SetPitch(atan2(m_Speed.y, xz) * 180 / M_PI);
 }
 
 
@@ -308,7 +308,7 @@ bool cEntity::DoTakeDamage(TakeDamageInfo & a_TDI)
 		return false;
 	}
 
-	if ((a_TDI.Attacker != NULL) && (a_TDI.Attacker->IsPlayer()))
+	if ((a_TDI.Attacker != nullptr) && (a_TDI.Attacker->IsPlayer()))
 	{
 		cPlayer * Player = (cPlayer *)a_TDI.Attacker;
 
@@ -544,7 +544,7 @@ bool cEntity::DoTakeDamage(TakeDamageInfo & a_TDI)
 	m_Health = std::max(m_Health, 0);
 
 	// Add knockback:
-	if ((IsMob() || IsPlayer()) && (a_TDI.Attacker != NULL))
+	if ((IsMob() || IsPlayer()) && (a_TDI.Attacker != nullptr))
 	{
 		int KnockbackLevel = a_TDI.Attacker->GetEquippedWeapon().m_Enchantments.GetLevel(cEnchantments::enchKnockback);  // More common enchantment
 		if (KnockbackLevel < 1)
@@ -571,7 +571,7 @@ bool cEntity::DoTakeDamage(TakeDamageInfo & a_TDI)
 	{
 		KilledBy(a_TDI);
 
-		if (a_TDI.Attacker != NULL)
+		if (a_TDI.Attacker != nullptr)
 		{
 			a_TDI.Attacker->Killed(this);
 		}
@@ -778,7 +778,7 @@ void cEntity::Tick(float a_Dt, cChunk & a_Chunk)
 		m_InvulnerableTicks--;
 	}
 
-	if (m_AttachedTo != NULL)
+	if (m_AttachedTo != nullptr)
 	{
 		Vector3d DeltaPos = m_Pos - m_AttachedTo->GetPosition();
 		if (DeltaPos.Length() > 0.5)
@@ -1092,7 +1092,7 @@ void cEntity::TickBurning(cChunk & a_Chunk)
 		{
 			if (!m_IsFireproof)
 			{
-				TakeDamage(dtOnFire, NULL, BURN_DAMAGE, 0);
+				TakeDamage(dtOnFire, nullptr, BURN_DAMAGE, 0);
 			}
 			m_TicksSinceLastBurnDamage = 0;
 		}
@@ -1163,7 +1163,7 @@ void cEntity::TickBurning(cChunk & a_Chunk)
 		{
 			if (!m_IsFireproof)
 			{
-				TakeDamage(dtLavaContact, NULL, LAVA_DAMAGE, 0);
+				TakeDamage(dtLavaContact, nullptr, LAVA_DAMAGE, 0);
 			}
 			m_TicksSinceLastLavaDamage = 0;
 		}
@@ -1184,7 +1184,7 @@ void cEntity::TickBurning(cChunk & a_Chunk)
 		{
 			if (!m_IsFireproof)
 			{
-				TakeDamage(dtFireContact, NULL, FIRE_DAMAGE, 0);
+				TakeDamage(dtFireContact, nullptr, FIRE_DAMAGE, 0);
 			}
 			m_TicksSinceLastFireDamage = 0;
 		}
@@ -1213,7 +1213,7 @@ void cEntity::TickInVoid(cChunk & a_Chunk)
 {
 	if (m_TicksSinceLastVoidDamage == 20)
 	{
-		TakeDamage(dtInVoid, NULL, 2, 0);
+		TakeDamage(dtInVoid, nullptr, 2, 0);
 		m_TicksSinceLastVoidDamage = 0;
 	}
 	else
@@ -1239,7 +1239,7 @@ void cEntity::DetectCacti(void)
 		(((GetPosY() - Y < 1) && (GetWorld()->GetBlock(X, Y, Z) == E_BLOCK_CACTUS))))
 		)
 	{
-		TakeDamage(dtCactusContact, NULL, 1, 0);
+		TakeDamage(dtCactusContact, nullptr, 1, 0);
 	}
 }
 
@@ -1380,7 +1380,7 @@ bool cEntity::DetectPortal()
 bool cEntity::DoMoveToWorld(cWorld * a_World, bool a_ShouldSendRespawn)
 {
 	UNUSED(a_ShouldSendRespawn);
-	ASSERT(a_World != NULL);
+	ASSERT(a_World != nullptr);
 
 	if (GetWorld() == a_World)
 	{
@@ -1406,7 +1406,7 @@ bool cEntity::DoMoveToWorld(cWorld * a_World, bool a_ShouldSendRespawn)
 bool cEntity::MoveToWorld(const AString & a_WorldName, bool a_ShouldSendRespawn)
 {
 	cWorld * World = cRoot::Get()->GetWorld(a_WorldName);
-	if (World == NULL)
+	if (World == nullptr)
 	{
 		LOG("%s: Couldn't find world \"%s\".", __FUNCTION__, a_WorldName.c_str());
 		return false;
@@ -1493,7 +1493,7 @@ void cEntity::HandleAir(void)
 			if (m_AirTickTimer <= 0)
 			{
 				// Damage player
-				TakeDamage(dtDrowning, NULL, 1, 1, 0);
+				TakeDamage(dtDrowning, nullptr, 1, 1, 0);
 				// Reset timer
 				m_AirTickTimer = DROWNING_TICKS;
 			}
@@ -1708,7 +1708,7 @@ void cEntity::AttachTo(cEntity * a_AttachTo)
 		// Already attached to that entity, nothing to do here
 		return;
 	}
-	if (m_AttachedTo != NULL)
+	if (m_AttachedTo != nullptr)
 	{
 		// Detach from any previous entity:
 		Detach();
@@ -1726,14 +1726,14 @@ void cEntity::AttachTo(cEntity * a_AttachTo)
 
 void cEntity::Detach(void)
 {
-	if (m_AttachedTo == NULL)
+	if (m_AttachedTo == nullptr)
 	{
 		// Attached to no entity, our work is done
 		return;
 	}
-	m_AttachedTo->m_Attachee = NULL;
-	m_AttachedTo = NULL;
-	m_World->BroadcastAttachEntity(*this, NULL);
+	m_AttachedTo->m_Attachee = nullptr;
+	m_AttachedTo = nullptr;
+	m_World->BroadcastAttachEntity(*this, nullptr);
 }
 
 
@@ -1956,7 +1956,7 @@ void cEntity::HandleSpeedFromAttachee(float a_Forward, float a_Sideways)
 
 void cEntity::SteerVehicle(float a_Forward, float a_Sideways)
 {
-	if (m_AttachedTo == NULL)
+	if (m_AttachedTo == nullptr)
 	{
 		return;
 	}
diff --git a/src/Entities/Entity.h b/src/Entities/Entity.h
index 451ac3711..af545fe4a 100644
--- a/src/Entities/Entity.h
+++ b/src/Entities/Entity.h
@@ -32,7 +32,7 @@
 #define POSZ_TOINT FloorC(GetPosZ())
 #define POS_TOINT  Vector3i(POSXTOINT, POSYTOINT, POSZTOINT)
 
-#define GET_AND_VERIFY_CURRENT_CHUNK(ChunkVarName, X, Z) cChunk * ChunkVarName = a_Chunk.GetNeighborChunk(X, Z); if ((ChunkVarName == NULL) || !ChunkVarName->IsValid()) { return; }
+#define GET_AND_VERIFY_CURRENT_CHUNK(ChunkVarName, X, Z) cChunk * ChunkVarName = a_Chunk.GetNeighborChunk(X, Z); if ((ChunkVarName == nullptr) || !ChunkVarName->IsValid()) { return; }
 
 
 
@@ -84,13 +84,13 @@ public:
 		etFloater,
 		etItemFrame,
 		etPainting,
-
+		
 		// Common variations
 		etMob = etMonster,  // DEPRECATED, use etMonster instead!
 	} ;
-
+	
 	// tolua_end
-
+	
 	enum eEntityStatus
 	{
 		// TODO: Investiagate 0, 1, and 5 as Wiki.vg is not certain
@@ -127,22 +127,22 @@ public:
 		// Informs client to explode a firework based on its metadata
 		esFireworkExploding      = 17,
 	} ;
-
+	
 	static const int FIRE_TICKS_PER_DAMAGE = 10;   ///< Ticks to wait between damaging an entity when it stands in fire
 	static const int FIRE_DAMAGE           = 1;    ///< Damage to deal when standing in fire
 	static const int LAVA_TICKS_PER_DAMAGE = 10;   ///< Ticks to wait between damaging an entity when it stands in lava
 	static const int LAVA_DAMAGE           = 5;    ///< Damage to deal when standing in lava
 	static const int BURN_TICKS_PER_DAMAGE = 20;   ///< Ticks to wait between damaging an entity when it is burning
 	static const int BURN_DAMAGE           = 1;    ///< Damage to deal when the entity is burning
-
+	
 	static const int BURN_TICKS            = 200;  ///< Ticks to keep an entity burning after it has stood in lava / fire
-
+	
 	static const int MAX_AIR_LEVEL         = 300;  ///< Maximum air an entity can have
 	static const int DROWNING_TICKS        = 20;   ///< Number of ticks per heart of damage
-
+	
 	static const int VOID_BOUNDARY         = -46;  ///< Y position to begin applying void damage
 	static const int FALL_DAMAGE_HEIGHT    = 4;    ///< Y difference after which fall damage is applied
-
+	
 	cEntity(eEntityType a_EntityType, double a_X, double a_Y, double a_Z, double a_Width, double a_Height);
 	virtual ~cEntity();
 
@@ -151,9 +151,9 @@ public:
 	virtual bool Initialize(cWorld & a_World);
 
 	// tolua_begin
-
+	
 	eEntityType GetEntityType(void) const { return m_EntityType; }
-
+	
 	bool IsEnderCrystal(void) const { return (m_EntityType == etEnderCrystal); }
 	bool IsPlayer      (void) const { return (m_EntityType == etPlayer);       }
 	bool IsPickup      (void) const { return (m_EntityType == etPickup);       }
@@ -168,16 +168,16 @@ public:
 	bool IsFloater     (void) const { return (m_EntityType == etFloater);      }
 	bool IsItemFrame   (void) const { return (m_EntityType == etItemFrame);    }
 	bool IsPainting    (void) const { return (m_EntityType == etPainting);     }
-
+	
 	/// Returns true if the entity is of the specified class or a subclass (cPawn's IsA("cEntity") returns true)
 	virtual bool IsA(const char * a_ClassName) const;
-
+	
 	/** Returns the class name of this class */
 	static const char * GetClassStatic(void);
 	
 	/** Returns the topmost class name for the object */
 	virtual const char * GetClass(void) const;
-
+	
 	/** Returns the topmost class's parent class name for the object. cEntity returns an empty string (no parent). */
 	virtual const char * GetParentClass(void) const;
 
@@ -200,9 +200,9 @@ public:
 	double           GetSpeedY    (void) const { return m_Speed.y; }
 	double           GetSpeedZ    (void) const { return m_Speed.z; }
 	double           GetWidth     (void) const { return m_Width;   }
-
-	int GetChunkX(void) const {return static_cast<int>(floor(m_Pos.x / cChunkDef::Width)); }
-	int GetChunkZ(void) const {return static_cast<int>(floor(m_Pos.z / cChunkDef::Width)); }
+	
+	int GetChunkX(void) const {return (int)floor(m_Pos.x / cChunkDef::Width); }
+	int GetChunkZ(void) const {return (int)floor(m_Pos.z / cChunkDef::Width); }
 
 	void SetHeadYaw (double a_HeadYaw);
 	void SetHeight  (double a_Height);
@@ -219,21 +219,21 @@ public:
 
 	/** Sets the speed of the entity, measured in m / sec */
 	void SetSpeed(double a_SpeedX, double a_SpeedY, double a_SpeedZ);
-
+	
 	/** Sets the speed of the entity, measured in m / sec */
 	void SetSpeed(const Vector3d & a_Speed) { SetSpeed(a_Speed.x, a_Speed.y, a_Speed.z); }
-
+	
 	/** Sets the speed in the X axis, leaving the other speed components intact. Measured in m / sec. */
 	void SetSpeedX(double a_SpeedX);
-
+	
 	/** Sets the speed in the Y axis, leaving the other speed components intact. Measured in m / sec. */
 	void SetSpeedY(double a_SpeedY);
-
+	
 	/** Sets the speed in the Z axis, leaving the other speed components intact. Measured in m / sec. */
 	void SetSpeedZ(double a_SpeedZ);
-
+	
 	void SetWidth   (double a_Width);
-
+	
 	void AddPosX    (double a_AddPosX);
 	void AddPosY    (double a_AddPosY);
 	void AddPosZ    (double a_AddPosZ);
@@ -244,7 +244,7 @@ public:
 	void AddSpeedX  (double a_AddSpeedX);
 	void AddSpeedY  (double a_AddSpeedY);
 	void AddSpeedZ  (double a_AddSpeedZ);
-
+	
 	virtual void HandleSpeedFromAttachee(float a_Forward, float a_Sideways);
 	void SteerVehicle(float a_Forward, float a_Sideways);
 
@@ -256,60 +256,60 @@ public:
 
 	/// Makes this pawn take damage from an attack by a_Attacker. Damage values are calculated automatically and DoTakeDamage() called
 	void TakeDamage(cEntity & a_Attacker);
-
+	
 	/// Makes this entity take the specified damage. The final damage is calculated using current armor, then DoTakeDamage() called
 	void TakeDamage(eDamageType a_DamageType, cEntity * a_Attacker, int a_RawDamage, double a_KnockbackAmount);
 
 	/// Makes this entity take the specified damage. The values are packed into a TDI, knockback calculated, then sent through DoTakeDamage()
 	void TakeDamage(eDamageType a_DamageType, cEntity * a_Attacker, int a_RawDamage, int a_FinalDamage, double a_KnockbackAmount);
-
+	
 	float GetGravity(void) const { return m_Gravity; }
-
+	
 	void SetGravity(float a_Gravity) { m_Gravity = a_Gravity; }
-
+	
 	/// Sets the rotation to match the speed vector (entity goes "face-forward")
 	void SetYawFromSpeed(void);
-
+	
 	/// Sets the pitch to match the speed vector (entity gies "face-forward")
 	void SetPitchFromSpeed(void);
-
+	
 	// tolua_end
-
+	
 	/** Makes this entity take damage specified in the a_TDI.
 	The TDI is sent through plugins first, then applied.
 	If it returns false, the entity hasn't receive any damage. */
 	virtual bool DoTakeDamage(TakeDamageInfo & a_TDI);
-
+	
 	// tolua_begin
 
 	/// Returns the hitpoints that this pawn can deal to a_Receiver using its equipped items
 	virtual int GetRawDamageAgainst(const cEntity & a_Receiver);
-
+	
 	/** Returns whether armor will protect against the passed damage type **/
 	virtual bool ArmorCoversAgainst(eDamageType a_DamageType);
-
+	
 	/// Returns the hitpoints out of a_RawDamage that the currently equipped armor would cover
 	virtual int GetArmorCoverAgainst(const cEntity * a_Attacker, eDamageType a_DamageType, int a_RawDamage);
-
+	
 	/// Returns the knockback amount that the currently equipped items would cause to a_Receiver on a hit
 	virtual double GetKnockbackAmountAgainst(const cEntity & a_Receiver);
-
+	
 	/// Returns the curently equipped weapon; empty item if none
 	virtual cItem GetEquippedWeapon(void) const { return cItem(); }
-
+	
 	/// Returns the currently equipped helmet; empty item if none
 	virtual cItem GetEquippedHelmet(void) const { return cItem(); }
-
+	
 	/// Returns the currently equipped chestplate; empty item if none
 	virtual cItem GetEquippedChestplate(void) const { return cItem(); }
 
 	/// Returns the currently equipped leggings; empty item if none
 	virtual cItem GetEquippedLeggings(void) const { return cItem(); }
-
+	
 	/// Returns the currently equipped boots; empty item if none
 	virtual cItem GetEquippedBoots(void) const { return cItem(); }
 
-	/// Called when the health drops below zero. a_Killer may be NULL (environmental damage)
+	/// Called when the health drops below zero. a_Killer may be nullptr (environmental damage)
 	virtual void KilledBy(TakeDamageInfo & a_TDI);
 
 	/// Called when the entity kills another entity
@@ -317,20 +317,20 @@ public:
 
 	/// Heals the specified amount of HPs
 	virtual void Heal(int a_HitPoints);
-
+	
 	/// Returns the health of this entity
 	int GetHealth(void) const { return m_Health; }
-
+	
 	/// Sets the health of this entity; doesn't broadcast any hurt animation
 	void SetHealth(int a_Health);
-
+	
 	// tolua_end
 
 	virtual void Tick(float a_Dt, cChunk & a_Chunk);
-
+	
 	/// Handles the physics of the entity - updates position based on speed, updates speed based on environment
 	virtual void HandlePhysics(float a_Dt, cChunk & a_Chunk);
-
+	
 	/// Updates the state related to this entity being on fire
 	virtual void TickBurning(cChunk & a_Chunk);
 
@@ -341,34 +341,34 @@ public:
 	Returns true if MoveToWorld() was called, false if not
 	*/
 	virtual bool DetectPortal(void);
-
+	
 	/// Handles when the entity is in the void
 	virtual void TickInVoid(cChunk & a_Chunk);
 
 	/// Called when the entity starts burning
 	virtual void OnStartedBurning(void);
-
+	
 	/// Called when the entity finishes burning
 	virtual void OnFinishedBurning(void);
-
+	
 	// tolua_begin
-
+	
 	/// Sets the maximum value for the health
 	void SetMaxHealth(int a_MaxHealth);
 
 	int GetMaxHealth(void) const { return m_MaxHealth; }
-
+	
 	/// Sets whether the entity is fireproof
 	void SetIsFireproof(bool a_IsFireproof);
-
+	
 	bool IsFireproof(void) const { return m_IsFireproof; }
-
+	
 	/// Puts the entity on fire for the specified amount of ticks
 	void StartBurning(int a_TicksLeftBurning);
-
+	
 	/// Stops the entity from burning, resets all burning timers
 	void StopBurning(void);
-
+	
 	// tolua_end
 
 	/** Descendants override this function to send a command to the specified client to spawn the entity on the client.
@@ -377,10 +377,10 @@ public:
 	virtual void SpawnOn(cClientHandle & a_Client) = 0;
 
 	// tolua_begin
-
+	
 	/// Teleports to the entity specified
 	virtual void TeleportToEntity(cEntity & a_Entity);
-
+	
 	/// Teleports to the coordinates specified
 	virtual void TeleportToCoords(double a_PosX, double a_PosY, double a_PosZ);
 
@@ -389,7 +389,7 @@ public:
 
 	/** Moves entity to specified world, taking a world name */
 	bool MoveToWorld(const AString & a_WorldName, bool a_ShouldSendRespawn = true);
-
+	
 	// tolua_end
 
 	virtual bool DoMoveToWorld(cWorld * a_World, bool a_ShouldSendRespawn);
@@ -399,16 +399,16 @@ public:
 
 	/** Sets the world the entity will be leaving */
 	void SetWorldTravellingFrom(cWorld * a_World) { m_WorldTravellingFrom = a_World; }
-
+	
 	/// Updates clients of changes in the entity.
-	virtual void BroadcastMovementUpdate(const cClientHandle * a_Exclude = NULL);
-
+	virtual void BroadcastMovementUpdate(const cClientHandle * a_Exclude = nullptr);
+	
 	/// Attaches to the specified entity; detaches from any previous one first
 	void AttachTo(cEntity * a_AttachTo);
-
+	
 	/// Detaches from the currently attached entity, if any
 	virtual void Detach(void);
-
+	
 	/// Makes sure head yaw is not over the specified range.
 	void WrapHeadYaw();
 
@@ -417,9 +417,9 @@ public:
 
 	/// Makes speed is not over 20. Max speed is 20 blocks / second
 	void WrapSpeed();
-
+	
 	// tolua_begin
-
+	
 	// COMMON metadata flags; descendants may override the defaults:
 	virtual bool IsOnFire   (void) const {return (m_TicksLeftBurning > 0); }
 	virtual bool IsCrouched (void) const {return false; }
@@ -437,20 +437,20 @@ public:
 
 	/** Gets number of ticks this entity has existed for */
 	long int GetTicksAlive(void) const { return m_TicksAlive; }
-
+	
 	/** Gets the invulnerable ticks from the entity */
 	int GetInvulnerableTicks(void) const { return m_InvulnerableTicks; }
 
 	/** Set the invulnerable ticks from the entity */
 	void SetInvulnerableTicks(int a_InvulnerableTicks) { m_InvulnerableTicks = a_InvulnerableTicks; }
-
+	
 	// tolua_end
-
+	
 	/// Called when the specified player right-clicks this entity
 	virtual void OnRightClicked(cPlayer & a_Player) {}
 
 	/// Returns the list of drops for this pawn when it is killed. May check a_Killer for special handling (sword of looting etc.). Called from KilledBy().
-	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = NULL)
+	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = nullptr)
 	{
 		UNUSED(a_Drops);
 		UNUSED(a_Killer);
@@ -462,38 +462,38 @@ public:
 protected:
 	static cCriticalSection m_CSCount;
 	static int m_EntityCount;
-
+	
 	/** Measured in meter/second (m/s) */
 	Vector3d m_Speed;
 
 	int m_UniqueID;
-
+	
 	int m_Health;
 	int m_MaxHealth;
-
-	/// The entity to which this entity is attached (vehicle), NULL if none
+	
+	/// The entity to which this entity is attached (vehicle), nullptr if none
 	cEntity * m_AttachedTo;
-
-	/// The entity which is attached to this entity (rider), NULL if none
+	
+	/// The entity which is attached to this entity (rider), nullptr if none
 	cEntity * m_Attachee;
 
 	/** Stores whether head yaw has been set manually */
 	bool m_bDirtyHead;
-
+	
 	/** Stores whether our yaw/pitch/roll (body orientation) has been set manually */
 	bool m_bDirtyOrientation;
-
+	
 	/** Stores whether we have sent a Velocity packet with a speed of zero (no speed) to the client
 	Ensures that said packet is sent only once */
 	bool m_bHasSentNoSpeed;
 
 	/** Stores if the entity is on the ground */
 	bool m_bOnGround;
-
+	
 	/** Stores gravity that is applied to an entity every tick
 	For realistic effects, this should be negative. For spaaaaaaace, this can be zero or even positive */
 	float m_Gravity;
-
+	
 	/** Last position sent to client via the Relative Move or Teleport packets (not Velocity)
 	Only updated if cEntity::BroadcastMovementUpdate() is called! */
 	Vector3d m_LastPos;
@@ -502,37 +502,37 @@ protected:
 	bool m_IsInitialized;
 
 	/** World entity is travelling from
-	Set to a valid world pointer by MoveToWorld; reset to NULL when the entity is removed from the old world
+	Set to a valid world pointer by MoveToWorld; reset to nullptr when the entity is removed from the old world
 	Can't be a simple boolean as context switches between worlds may leave the new chunk processing (and therefore immediately removing) the entity before the old chunk could remove it
 	*/
 	cWorld * m_WorldTravellingFrom;
 
 	eEntityType m_EntityType;
-
+	
 	cWorld * m_World;
-
+	
 	/// Whether the entity is capable of taking fire or lava damage.
 	bool m_IsFireproof;
 
 	/// Time, in ticks, since the last damage dealt by being on fire. Valid only if on fire (IsOnFire())
 	int m_TicksSinceLastBurnDamage;
-
+	
 	/// Time, in ticks, since the last damage dealt by standing in lava. Reset to zero when moving out of lava.
 	int m_TicksSinceLastLavaDamage;
-
+	
 	/// Time, in ticks, since the last damage dealt by standing in fire. Reset to zero when moving out of fire.
 	int m_TicksSinceLastFireDamage;
-
+	
 	/// Time, in ticks, until the entity extinguishes its fire
 	int m_TicksLeftBurning;
-
+	
 	/// Time, in ticks, since the last damage dealt by the void. Reset to zero when moving out of the void.
 	int m_TicksSinceLastVoidDamage;
-
+	
 	/** Does the actual speed-setting. The default implementation just sets the member variable value;
 	overrides can provide further processing, such as forcing players to move at the given speed. */
 	virtual void DoSetSpeed(double a_SpeedX, double a_SpeedY, double a_SpeedZ);
-
+	
 	virtual void Destroyed(void) {}  // Called after the entity has been destroyed
 
 	/** Applies friction to an entity
@@ -543,7 +543,7 @@ protected:
 
 	/** Called in each tick to handle air-related processing i.e. drowning */
 	virtual void HandleAir(void);
-
+	
 	/** Called once per tick to set IsSwimming and IsSubmerged */
 	virtual void SetSwimState(cChunk & a_Chunk);
 
@@ -568,29 +568,29 @@ protected:
 
 	/** Portal delay timer and cooldown boolean data */
 	sPortalCooldownData m_PortalCooldownData;
-
+	
 	/** The number of ticks this entity has been alive for */
 	long int m_TicksAlive;
-
+	
 private:
 	/** Measured in degrees, [-180, +180) */
 	double   m_HeadYaw;
-
+	
 	/** Measured in degrees, [-180, +180) */
 	Vector3d m_Rot;
-
+	
 	/** Position of the entity's XZ center and Y bottom */
 	Vector3d m_Pos;
-
+	
 	/** Measured in meter / second */
 	Vector3d m_WaterSpeed;
-
+	
 	/** Measured in Kilograms (Kg) */
 	double m_Mass;
-
+	
 	/** Width of the entity, in the XZ plane. Since entities are represented as cylinders, this is more of a diameter. */
 	double m_Width;
-
+	
 	/** Height of the entity (Y axis) */
 	double m_Height;
 
@@ -600,3 +600,7 @@ private:
 } ;  // tolua_export
 
 typedef std::list<cEntity *> cEntityList;
+
+
+
+
diff --git a/src/Entities/EntityEffect.cpp b/src/Entities/EntityEffect.cpp
index b1ddaa30e..bae686b77 100644
--- a/src/Entities/EntityEffect.cpp
+++ b/src/Entities/EntityEffect.cpp
@@ -216,7 +216,7 @@ cEntityEffect * cEntityEffect::CreateEntityEffect(cEntityEffect::eType a_EffectT
 	}
 	
 	ASSERT(!"Unhandled entity effect type!");
-	return NULL;
+	return nullptr;
 }
 
 
@@ -329,7 +329,7 @@ void cEntityEffectInstantHealth::OnActivate(cPawn & a_Target)
 	
 	if (a_Target.IsMob() && ((cMonster &) a_Target).IsUndead())
 	{
-		a_Target.TakeDamage(dtPotionOfHarming, NULL, amount, 0);  // TODO: Store attacker in a pointer-safe way, pass to TakeDamage
+		a_Target.TakeDamage(dtPotionOfHarming, nullptr, amount, 0);  // TODO: Store attacker in a pointer-safe way, pass to TakeDamage
 		return;
 	}
 	a_Target.Heal(amount);
@@ -352,7 +352,7 @@ void cEntityEffectInstantDamage::OnActivate(cPawn & a_Target)
 		a_Target.Heal(amount);
 		return;
 	}
-	a_Target.TakeDamage(dtPotionOfHarming, NULL, amount, 0);  // TODO: Store attacker in a pointer-safe way, pass to TakeDamage
+	a_Target.TakeDamage(dtPotionOfHarming, nullptr, amount, 0);  // TODO: Store attacker in a pointer-safe way, pass to TakeDamage
 }
 
 
@@ -452,7 +452,7 @@ void cEntityEffectPoison::OnTick(cPawn & a_Target)
 		// Cannot take poison damage when health is at 1
 		if (a_Target.GetHealth() > 1)
 		{
-			a_Target.TakeDamage(dtPoisoning, NULL, 1, 0);
+			a_Target.TakeDamage(dtPoisoning, nullptr, 1, 0);
 		}
 	}
 }
@@ -473,7 +473,7 @@ void cEntityEffectWither::OnTick(cPawn & a_Target)
 
 	if ((m_Ticks % frequency) == 0)
 	{
-		a_Target.TakeDamage(dtWither, NULL, 1, 0);
+		a_Target.TakeDamage(dtWither, nullptr, 1, 0);
 	}
 }
 
diff --git a/src/Entities/ExpOrb.cpp b/src/Entities/ExpOrb.cpp
index 73d5cbfed..751308661 100644
--- a/src/Entities/ExpOrb.cpp
+++ b/src/Entities/ExpOrb.cpp
@@ -45,7 +45,7 @@ void cExpOrb::SpawnOn(cClientHandle & a_Client)
 void cExpOrb::Tick(float a_Dt, cChunk & a_Chunk)
 {
 	cPlayer * a_ClosestPlayer(m_World->FindClosestPlayer(Vector3f(GetPosition()), 5));
-	if (a_ClosestPlayer != NULL)
+	if (a_ClosestPlayer != nullptr)
 	{
 		Vector3f a_PlayerPos(a_ClosestPlayer->GetPosition());
 		a_PlayerPos.y++;
diff --git a/src/Entities/Floater.cpp b/src/Entities/Floater.cpp
index 159429147..5fe6a1238 100644
--- a/src/Entities/Floater.cpp
+++ b/src/Entities/Floater.cpp
@@ -22,7 +22,7 @@ public:
 		m_Pos(a_Pos),
 		m_NextPos(a_NextPos),
 		m_MinCoeff(1),
-		m_HitEntity(NULL)
+		m_HitEntity(nullptr)
 	{
 	}
 	virtual bool Item(cEntity * a_Entity) override
diff --git a/src/Entities/ItemFrame.cpp b/src/Entities/ItemFrame.cpp
index 6704c05b4..dfffcd3ed 100644
--- a/src/Entities/ItemFrame.cpp
+++ b/src/Entities/ItemFrame.cpp
@@ -62,7 +62,7 @@ void cItemFrame::KilledBy(TakeDamageInfo & a_TDI)
 		return;
 	}
 
-	if ((a_TDI.Attacker != NULL) && a_TDI.Attacker->IsPlayer() && !((cPlayer *)a_TDI.Attacker)->IsGameModeCreative())
+	if ((a_TDI.Attacker != nullptr) && a_TDI.Attacker->IsPlayer() && !((cPlayer *)a_TDI.Attacker)->IsGameModeCreative())
 	{
 		cItems Item;
 		Item.push_back(m_Item);
@@ -83,7 +83,7 @@ void cItemFrame::KilledBy(TakeDamageInfo & a_TDI)
 
 void cItemFrame::GetDrops(cItems & a_Items, cEntity * a_Killer)
 {
-	if ((a_Killer != NULL) && a_Killer->IsPlayer() && !((cPlayer *)a_Killer)->IsGameModeCreative())
+	if ((a_Killer != nullptr) && a_Killer->IsPlayer() && !((cPlayer *)a_Killer)->IsGameModeCreative())
 	{
 		a_Items.push_back(cItem(E_ITEM_ITEM_FRAME));
 	}
diff --git a/src/Entities/Minecart.cpp b/src/Entities/Minecart.cpp
index f45e7bb69..22e046800 100644
--- a/src/Entities/Minecart.cpp
+++ b/src/Entities/Minecart.cpp
@@ -36,7 +36,7 @@ public:
 
 	virtual bool Item(cEntity * a_Entity) override
 	{
-		ASSERT(a_Entity != NULL);
+		ASSERT(a_Entity != nullptr);
 
 		if (!a_Entity->IsPlayer() && !a_Entity->IsMob() && !a_Entity->IsMinecart() && !a_Entity->IsBoat())
 		{
@@ -130,7 +130,7 @@ void cMinecart::HandlePhysics(float a_Dt, cChunk & a_Chunk)
 	int RelPosX = POSX_TOINT - a_Chunk.GetPosX() * cChunkDef::Width;
 	int RelPosZ = POSZ_TOINT - a_Chunk.GetPosZ() * cChunkDef::Width;
 	cChunk * Chunk = a_Chunk.GetRelNeighborChunkAdjustCoords(RelPosX, RelPosZ);
-	if (Chunk == NULL)
+	if (Chunk == nullptr)
 	{
 		// Inside an unloaded chunk, bail out all processing
 		return;
@@ -806,7 +806,7 @@ bool cMinecart::TestBlockCollision(NIBBLETYPE a_RailMeta)
 
 bool cMinecart::TestEntityCollision(NIBBLETYPE a_RailMeta)
 {
-	cMinecartCollisionCallback MinecartCollisionCallback(GetPosition(), GetHeight(), GetWidth(), GetUniqueID(), ((m_Attachee == NULL) ? -1 : m_Attachee->GetUniqueID()));
+	cMinecartCollisionCallback MinecartCollisionCallback(GetPosition(), GetHeight(), GetWidth(), GetUniqueID(), ((m_Attachee == nullptr) ? -1 : m_Attachee->GetUniqueID()));
 	int ChunkX, ChunkZ;
 	cChunkDef::BlockToChunk(POSX_TOINT, POSZ_TOINT, ChunkX, ChunkZ);
 	m_World->ForEachEntityInChunk(ChunkX, ChunkZ, MinecartCollisionCallback);
@@ -980,7 +980,7 @@ bool cMinecart::TestEntityCollision(NIBBLETYPE a_RailMeta)
 
 bool cMinecart::DoTakeDamage(TakeDamageInfo & TDI)
 {
-	if ((TDI.Attacker != NULL) && TDI.Attacker->IsPlayer() && ((cPlayer *)TDI.Attacker)->IsGameModeCreative())
+	if ((TDI.Attacker != nullptr) && TDI.Attacker->IsPlayer() && ((cPlayer *)TDI.Attacker)->IsGameModeCreative())
 	{
 		Destroy();
 		TDI.FinalDamage = GetMaxHealth();  // Instant hit for creative
@@ -1074,7 +1074,7 @@ void cRideableMinecart::OnRightClicked(cPlayer & a_Player)
 {
 	super::OnRightClicked(a_Player);
 
-	if (m_Attachee != NULL)
+	if (m_Attachee != nullptr)
 	{
 		if (m_Attachee->GetUniqueID() == a_Player.GetUniqueID())
 		{
@@ -1120,14 +1120,14 @@ void cMinecartWithChest::OnRightClicked(cPlayer & a_Player)
 {
 	// If the window is not created, open it anew:
 	cWindow * Window = GetWindow();
-	if (Window == NULL)
+	if (Window == nullptr)
 	{
 		OpenNewWindow();
 		Window = GetWindow();
 	}
 
 	// Open the window for the player:
-	if (Window != NULL)
+	if (Window != nullptr)
 	{
 		if (a_Player.GetWindow() != Window)
 		{
diff --git a/src/Entities/Minecart.h b/src/Entities/Minecart.h
index ab906fd06..40e22c641 100644
--- a/src/Entities/Minecart.h
+++ b/src/Entities/Minecart.h
@@ -140,9 +140,9 @@ protected:
 	{
 		UNUSED(a_SlotNum);
 		ASSERT(a_Grid == &m_Contents);
-		if (m_World != NULL)
+		if (m_World != nullptr)
 		{
-			if (GetWindow() != NULL)
+			if (GetWindow() != nullptr)
 			{
 				GetWindow()->BroadcastWholeWindow();
 			}
diff --git a/src/Entities/Painting.cpp b/src/Entities/Painting.cpp
index e217556c7..1aa6da0a1 100644
--- a/src/Entities/Painting.cpp
+++ b/src/Entities/Painting.cpp
@@ -43,7 +43,7 @@ void cPainting::Tick(float a_Dt, cChunk & a_Chunk)
 
 void cPainting::GetDrops(cItems & a_Items, cEntity * a_Killer)
 {
-	if ((a_Killer != NULL) && a_Killer->IsPlayer() && !((cPlayer *)a_Killer)->IsGameModeCreative())
+	if ((a_Killer != nullptr) && a_Killer->IsPlayer() && !((cPlayer *)a_Killer)->IsGameModeCreative())
 	{
 		a_Items.push_back(cItem(E_ITEM_PAINTING));
 	}
diff --git a/src/Entities/Player.cpp b/src/Entities/Player.cpp
index 6bd0a3d20..790147fd3 100644
--- a/src/Entities/Player.cpp
+++ b/src/Entities/Player.cpp
@@ -56,8 +56,8 @@ cPlayer::cPlayer(cClientHandle* a_Client, const AString & a_PlayerName) :
 	m_Stance(0.0),
 	m_Inventory(*this),
 	m_EnderChestContents(9, 3),
-	m_CurrentWindow(NULL),
-	m_InventoryWindow(NULL),
+	m_CurrentWindow(nullptr),
+	m_InventoryWindow(nullptr),
 	m_GameMode(eGameMode_NotSet),
 	m_IP(""),
 	m_ClientHandle(a_Client),
@@ -78,10 +78,10 @@ cPlayer::cPlayer(cClientHandle* a_Client, const AString & a_PlayerName) :
 	m_IsChargingBow(false),
 	m_BowCharge(0),
 	m_FloaterID(-1),
-	m_Team(NULL),
+	m_Team(nullptr),
 	m_TicksUntilNextSave(PLAYER_INVENTORY_SAVE_INTERVAL),
 	m_bIsTeleporting(false),
-	m_UUID((a_Client != NULL) ? a_Client->GetUUID() : ""),
+	m_UUID((a_Client != nullptr) ? a_Client->GetUUID() : ""),
 	m_CustomName("")
 {
 	m_InventoryWindow = new cInventoryWindow(*this);
@@ -96,7 +96,7 @@ cPlayer::cPlayer(cClientHandle* a_Client, const AString & a_PlayerName) :
 	
 	m_PlayerName = a_PlayerName;
 
-	cWorld * World = NULL;
+	cWorld * World = nullptr;
 	if (!LoadFromDisk(World))
 	{
 		m_Inventory.Clear();
@@ -144,10 +144,10 @@ cPlayer::~cPlayer(void)
 
 	SaveToDisk();
 
-	m_ClientHandle = NULL;
+	m_ClientHandle = nullptr;
 	
 	delete m_InventoryWindow;
-	m_InventoryWindow = NULL;
+	m_InventoryWindow = nullptr;
 	
 	LOGD("Player %p deleted", this);
 }
@@ -186,12 +186,12 @@ void cPlayer::SpawnOn(cClientHandle & a_Client)
 
 void cPlayer::Tick(float a_Dt, cChunk & a_Chunk)
 {
-	if (m_ClientHandle != NULL)
+	if (m_ClientHandle != nullptr)
 	{
 		if (m_ClientHandle->IsDestroyed())
 		{
 			// This should not happen, because destroying a client will remove it from the world, but just in case
-			m_ClientHandle = NULL;
+			m_ClientHandle = nullptr;
 			return;
 		}
 		
@@ -504,7 +504,7 @@ void cPlayer::SetTouchGround(bool a_bTouchGround)
 		if (Damage > 0)
 		{
 			// cPlayer makes sure damage isn't applied in creative, no need to check here
-			TakeDamage(dtFalling, NULL, Damage, Damage, 0);
+			TakeDamage(dtFalling, nullptr, Damage, Damage, 0);
 			
 			// Fall particles
 			GetWorld()->BroadcastSoundParticleEffect(2006, POSX_TOINT, (int)GetPosY() - 1, POSZ_TOINT, Damage /* Used as particle effect speed modifier */);
@@ -651,7 +651,7 @@ void cPlayer::AbortEating(void)
 
 void cPlayer::SendHealth(void)
 {
-	if (m_ClientHandle != NULL)
+	if (m_ClientHandle != nullptr)
 	{
 		m_ClientHandle->SendHealth();
 	}
@@ -663,7 +663,7 @@ void cPlayer::SendHealth(void)
 
 void cPlayer::SendExperience(void)
 {
-	if (m_ClientHandle != NULL)
+	if (m_ClientHandle != nullptr)
 	{
 		m_ClientHandle->SendExperience();
 		m_bDirtyExperience = false;
@@ -859,11 +859,11 @@ bool cPlayer::DoTakeDamage(TakeDamageInfo & a_TDI)
 		}
 	}
 
-	if ((a_TDI.Attacker != NULL) && (a_TDI.Attacker->IsPlayer()))
+	if ((a_TDI.Attacker != nullptr) && (a_TDI.Attacker->IsPlayer()))
 	{
 		cPlayer * Attacker = (cPlayer *)a_TDI.Attacker;
 
-		if ((m_Team != NULL) && (m_Team == Attacker->m_Team))
+		if ((m_Team != nullptr) && (m_Team == Attacker->m_Team))
 		{
 			if (!m_Team->AllowsFriendlyFire())
 			{
@@ -915,7 +915,7 @@ void cPlayer::KilledBy(TakeDamageInfo & a_TDI)
 	m_World->SpawnItemPickups(Pickups, GetPosX(), GetPosY(), GetPosZ(), 10);
 	SaveToDisk();  // Save it, yeah the world is a tough place !
 
-	if ((a_TDI.Attacker == NULL) && m_World->ShouldBroadcastDeathMessages())
+	if ((a_TDI.Attacker == nullptr) && m_World->ShouldBroadcastDeathMessages())
 	{
 		AString DamageText;
 		switch (a_TDI.DamageType)
@@ -941,7 +941,7 @@ void cPlayer::KilledBy(TakeDamageInfo & a_TDI)
 		}
 		GetWorld()->BroadcastChatDeath(Printf("%s %s", GetName().c_str(), DamageText.c_str()));
 	}
-	else if (a_TDI.Attacker == NULL)  // && !m_World->ShouldBroadcastDeathMessages() by fallthrough
+	else if (a_TDI.Attacker == nullptr)  // && !m_World->ShouldBroadcastDeathMessages() by fallthrough
 	{
 		// no-op
 	}
@@ -997,7 +997,7 @@ void cPlayer::Killed(cEntity * a_Victim)
 
 void cPlayer::Respawn(void)
 {
-	ASSERT(m_World != NULL);
+	ASSERT(m_World != nullptr);
 
 	m_Health = GetMaxHealth();
 	SetInvulnerableTicks(20);
@@ -1107,9 +1107,9 @@ void cPlayer::SetTeam(cTeam * a_Team)
 
 cTeam * cPlayer::UpdateTeam(void)
 {
-	if (m_World == NULL)
+	if (m_World == nullptr)
 	{
-		SetTeam(NULL);
+		SetTeam(nullptr);
 	}
 	else
 	{
@@ -1142,7 +1142,7 @@ void cPlayer::OpenWindow(cWindow * a_Window)
 
 void cPlayer::CloseWindow(bool a_CanRefuse)
 {
-	if (m_CurrentWindow == NULL)
+	if (m_CurrentWindow == nullptr)
 	{
 		m_CurrentWindow = m_InventoryWindow;
 		return;
@@ -1167,7 +1167,7 @@ void cPlayer::CloseWindow(bool a_CanRefuse)
 
 void cPlayer::CloseWindowIfID(char a_WindowID, bool a_CanRefuse)
 {
-	if ((m_CurrentWindow == NULL) || (m_CurrentWindow->GetWindowID() != a_WindowID))
+	if ((m_CurrentWindow == nullptr) || (m_CurrentWindow->GetWindowID() != a_WindowID))
 	{
 		return;
 	}
@@ -1354,7 +1354,7 @@ void cPlayer::MoveTo( const Vector3d & a_NewPos)
 		// Y = -999 and X, Z = attempting to create speed, usually up to 0.03
 		// We cannot test m_AttachedTo, because when deattaching, the server thinks the client is already deattached while
 		// the client may still send more of these nonsensical packets.
-		if (m_AttachedTo != NULL)
+		if (m_AttachedTo != nullptr)
 		{
 			Vector3d AddSpeed(a_NewPos);
 			AddSpeed.y = 0;
@@ -1581,7 +1581,7 @@ void cPlayer::TossItems(const cItems & a_Items)
 
 bool cPlayer::DoMoveToWorld(cWorld * a_World, bool a_ShouldSendRespawn)
 {
-	ASSERT(a_World != NULL);
+	ASSERT(a_World != nullptr);
 
 	if (GetWorld() == a_World)
 	{
@@ -1590,7 +1590,7 @@ bool cPlayer::DoMoveToWorld(cWorld * a_World, bool a_ShouldSendRespawn)
 	}
 	
 	// Send the respawn packet:
-	if (a_ShouldSendRespawn && (m_ClientHandle != NULL))
+	if (a_ShouldSendRespawn && (m_ClientHandle != nullptr))
 	{
 		m_ClientHandle->SendRespawn(a_World->GetDimension());
 	}
@@ -1652,7 +1652,7 @@ bool cPlayer::LoadFromDisk(cWorldPtr & a_World)
 		GetName().c_str(), m_UUID.c_str(), OfflineUUID.c_str(), OfflineUsage
 	);
 
-	if (a_World == NULL)
+	if (a_World == nullptr)
 	{
 		a_World = cRoot::Get()->GetDefaultWorld();
 	}
@@ -1729,7 +1729,7 @@ bool cPlayer::LoadFromFile(const AString & a_FileName, cWorldPtr & a_World)
 
 	m_LoadedWorldName = root.get("world", "world").asString();
 	a_World = cRoot::Get()->GetWorld(GetLoadedWorldName(), false);
-	if (a_World == NULL)
+	if (a_World == nullptr)
 	{
 		a_World = cRoot::Get()->GetDefaultWorld();
 	}
@@ -1795,7 +1795,7 @@ bool cPlayer::SaveToDisk()
 	root["SpawnY"]              = GetLastBedPos().y;
 	root["SpawnZ"]              = GetLastBedPos().z;
 
-	if (m_World != NULL)
+	if (m_World != nullptr)
 	{
 		root["world"] = m_World->GetName();
 		if (m_GameMode == m_World->GetGameMode())
@@ -1949,7 +1949,7 @@ void cPlayer::HandleFood(void)
 			else if ((m_FoodLevel <= 0) && (m_Health > 1))
 			{
 				// Damage from starving
-				TakeDamage(dtStarving, NULL, 1, 1, 0);
+				TakeDamage(dtStarving, nullptr, 1, 1, 0);
 			}
 		}
 	}
@@ -2018,7 +2018,7 @@ void cPlayer::UpdateMovementStats(const Vector3d & a_DeltaPos)
 {
 	StatValue Value = (StatValue)floor(a_DeltaPos.Length() * 100 + 0.5);
 
-	if (m_AttachedTo == NULL)
+	if (m_AttachedTo == nullptr)
 	{
 		if (IsClimbing())
 		{
@@ -2091,7 +2091,7 @@ void cPlayer::ApplyFoodExhaustionFromMovement()
 	}
 
 	// If riding anything, apply no food exhaustion
-	if (m_AttachedTo != NULL)
+	if (m_AttachedTo != nullptr)
 	{
 		return;
 	}
diff --git a/src/Entities/Player.h b/src/Entities/Player.h
index 22d6a2ae2..4bb51b556 100644
--- a/src/Entities/Player.h
+++ b/src/Entities/Player.h
@@ -176,10 +176,10 @@ public:
 	
 	AString GetIP(void) const { return m_IP; }  // tolua_export
 
-	/** Returns the associated team, NULL if none */
+	/** Returns the associated team, nullptr if none */
 	cTeam * GetTeam(void) { return m_Team; }  // tolua_export
 
-	/** Sets the player team, NULL if none */
+	/** Sets the player team, nullptr if none */
 	void SetTeam(cTeam * a_Team);
 
 	// tolua_end
diff --git a/src/Entities/ProjectileEntity.cpp b/src/Entities/ProjectileEntity.cpp
index ab25ac30c..1768714f8 100644
--- a/src/Entities/ProjectileEntity.cpp
+++ b/src/Entities/ProjectileEntity.cpp
@@ -135,7 +135,7 @@ public:
 		m_Pos(a_Pos),
 		m_NextPos(a_NextPos),
 		m_MinCoeff(1),
-		m_HitEntity(NULL)
+		m_HitEntity(nullptr)
 	{
 	}
 	
@@ -221,9 +221,9 @@ cProjectileEntity::cProjectileEntity(eKind a_Kind, cEntity * a_Creator, double a
 	super(etProjectile, a_X, a_Y, a_Z, a_Width, a_Height),
 	m_ProjectileKind(a_Kind),
 	m_CreatorData(
-		((a_Creator != NULL) ? a_Creator->GetUniqueID() : -1),
-		((a_Creator != NULL) ? (a_Creator->IsPlayer() ? ((cPlayer *)a_Creator)->GetName() : "") : ""),
-		((a_Creator != NULL) ? a_Creator->GetEquippedWeapon().m_Enchantments : cEnchantments())
+		((a_Creator != nullptr) ? a_Creator->GetUniqueID() : -1),
+		((a_Creator != nullptr) ? (a_Creator->IsPlayer() ? ((cPlayer *)a_Creator)->GetName() : "") : ""),
+		((a_Creator != nullptr) ? a_Creator->GetEquippedWeapon().m_Enchantments : cEnchantments())
 	),
 	m_IsInGround(false)
 {
@@ -251,7 +251,7 @@ cProjectileEntity::cProjectileEntity(eKind a_Kind, cEntity * a_Creator, const Ve
 cProjectileEntity * cProjectileEntity::Create(eKind a_Kind, cEntity * a_Creator, double a_X, double a_Y, double a_Z, const cItem * a_Item, const Vector3d * a_Speed)
 {
 	Vector3d Speed;
-	if (a_Speed != NULL)
+	if (a_Speed != nullptr)
 	{
 		Speed = *a_Speed;
 	}
@@ -269,10 +269,10 @@ cProjectileEntity * cProjectileEntity::Create(eKind a_Kind, cEntity * a_Creator,
 		case pkWitherSkull:   return new cWitherSkullEntity     (a_Creator, a_X, a_Y, a_Z, Speed);
 		case pkFirework:
 		{
-			ASSERT(a_Item != NULL);
+			ASSERT(a_Item != nullptr);
 			if (a_Item->m_FireworkItem.m_Colours.empty())
 			{
-				return NULL;
+				return nullptr;
 			}
 
 			return new cFireworkEntity(a_Creator, a_X, a_Y, a_Z, *a_Item);
@@ -280,7 +280,7 @@ cProjectileEntity * cProjectileEntity::Create(eKind a_Kind, cEntity * a_Creator,
 	}
 	
 	LOGWARNING("%s: Unknown projectile kind: %d", __FUNCTION__, a_Kind);
-	return NULL;
+	return nullptr;
 }
 
 
diff --git a/src/Entities/ProjectileEntity.h b/src/Entities/ProjectileEntity.h
index b9d2dfa63..2a98e31c7 100644
--- a/src/Entities/ProjectileEntity.h
+++ b/src/Entities/ProjectileEntity.h
@@ -46,7 +46,7 @@ public:
 	cProjectileEntity(eKind a_Kind, cEntity * a_Creator, double a_X, double a_Y, double a_Z, double a_Width, double a_Height);
 	cProjectileEntity(eKind a_Kind, cEntity * a_Creator, const Vector3d & a_Pos, const Vector3d & a_Speed, double a_Width, double a_Height);
 	
-	static cProjectileEntity * Create(eKind a_Kind, cEntity * a_Creator, double a_X, double a_Y, double a_Z, const cItem * a_Item, const Vector3d * a_Speed = NULL);
+	static cProjectileEntity * Create(eKind a_Kind, cEntity * a_Creator, double a_X, double a_Y, double a_Z, const cItem * a_Item, const Vector3d * a_Speed = nullptr);
 	
 	/** Called by the physics blocktracer when the entity hits a solid block, the hit position and the face hit (BLOCK_FACE_) is given */
 	virtual void OnHitSolidBlock(const Vector3d & a_HitPos, eBlockFace a_HitFace);
@@ -110,7 +110,7 @@ protected:
 	eKind m_ProjectileKind;
 	
 	/** The structure for containing the entity ID and name who has created this projectile
-	The ID and/or name may be NULL (e.g. for dispensers/mobs)
+	The ID and/or name may be nullptr (e.g. for dispensers/mobs)
 	*/
 	CreatorData m_CreatorData;
 	
diff --git a/src/FurnaceRecipe.cpp b/src/FurnaceRecipe.cpp
index d200ef3d7..9b3b2ecbe 100644
--- a/src/FurnaceRecipe.cpp
+++ b/src/FurnaceRecipe.cpp
@@ -43,7 +43,7 @@ cFurnaceRecipe::~cFurnaceRecipe()
 {
 	ClearRecipes();
 	delete m_pState;
-	m_pState = NULL;
+	m_pState = nullptr;
 }
 
 
@@ -247,9 +247,9 @@ void cFurnaceRecipe::ClearRecipes(void)
 	{
 		cRecipe Recipe = *itr;
 		delete Recipe.In;
-		Recipe.In = NULL;
+		Recipe.In = nullptr;
 		delete Recipe.Out;
-		Recipe.Out = NULL;
+		Recipe.Out = nullptr;
 	}
 	m_pState->Recipes.clear();
 
@@ -257,7 +257,7 @@ void cFurnaceRecipe::ClearRecipes(void)
 	{
 		cFuel Fuel = *itr;
 		delete Fuel.In;
-		Fuel.In = NULL;
+		Fuel.In = nullptr;
 	}
 	m_pState->Fuel.clear();
 }
diff --git a/src/FurnaceRecipe.h b/src/FurnaceRecipe.h
index 6a1650695..936ef706d 100644
--- a/src/FurnaceRecipe.h
+++ b/src/FurnaceRecipe.h
@@ -32,7 +32,7 @@ public:
 		int CookTime;  ///< How long this recipe takes to smelt, in ticks
 	};
 	
-	/** Returns a recipe for the specified input, NULL if no recipe found */
+	/** Returns a recipe for the specified input, nullptr if no recipe found */
 	const cRecipe * GetRecipeFrom(const cItem & a_Ingredient) const;
 	
 	/** Returns the amount of time that the specified fuel burns, in ticks */
diff --git a/src/Generating/BioGen.cpp b/src/Generating/BioGen.cpp
index b9face1f8..d86d44bbc 100644
--- a/src/Generating/BioGen.cpp
+++ b/src/Generating/BioGen.cpp
@@ -69,9 +69,9 @@ cBioGenCache::cBioGenCache(cBiomeGenPtr a_BioGenToCache, int a_CacheSize) :
 cBioGenCache::~cBioGenCache()
 {
 	delete[] m_CacheData;
-	m_CacheData = NULL;
+	m_CacheData = nullptr;
 	delete[] m_CacheOrder;
-	m_CacheOrder = NULL;
+	m_CacheOrder = nullptr;
 }
 
 
@@ -928,7 +928,7 @@ cBiomeGenPtr cBiomeGen::CreateBiomeGen(cIniFile & a_IniFile, int a_Seed, bool &
 		BiomeGenName = "MultiStepMap";
 	}
 
-	cBiomeGen * res = NULL;
+	cBiomeGen * res = nullptr;
 	a_CacheOffByDefault = false;
 	if (NoCaseCompare(BiomeGenName, "constant") == 0)
 	{
diff --git a/src/Generating/ChunkDesc.cpp b/src/Generating/ChunkDesc.cpp
index 566332b1f..020d3bd0f 100644
--- a/src/Generating/ChunkDesc.cpp
+++ b/src/Generating/ChunkDesc.cpp
@@ -530,10 +530,10 @@ cBlockEntity * cChunkDesc::GetBlockEntity(int a_RelX, int a_RelY, int a_RelZ)
 	
 	// The block entity is not created yet, try to create it and add to list:
 	cBlockEntity * be = cBlockEntity::CreateByBlockType(GetBlockType(a_RelX, a_RelY, a_RelZ), GetBlockMeta(a_RelX, a_RelY, a_RelZ), AbsX, a_RelY, AbsZ);
-	if (be == NULL)
+	if (be == nullptr)
 	{
 		// No block entity for this block type
-		return NULL;
+		return nullptr;
 	}
 	m_BlockEntities.push_back(be);
 	return be;
diff --git a/src/Generating/ChunkDesc.h b/src/Generating/ChunkDesc.h
index eeea0c957..570132790 100644
--- a/src/Generating/ChunkDesc.h
+++ b/src/Generating/ChunkDesc.h
@@ -172,7 +172,7 @@ public:
 	
 	/** Returns the block entity at the specified coords.
 	If there is no block entity at those coords, tries to create one, based on the block type
-	If the blocktype doesn't support a block entity, returns NULL. */
+	If the blocktype doesn't support a block entity, returns nullptr. */
 	cBlockEntity * GetBlockEntity(int a_RelX, int a_RelY, int a_RelZ);
 	
 	/** Updates the heightmap to match the current contents.
diff --git a/src/Generating/ChunkGenerator.cpp b/src/Generating/ChunkGenerator.cpp
index d615456c1..1eecd6e51 100644
--- a/src/Generating/ChunkGenerator.cpp
+++ b/src/Generating/ChunkGenerator.cpp
@@ -28,9 +28,9 @@ const unsigned int QUEUE_SKIP_LIMIT = 500;
 cChunkGenerator::cChunkGenerator(void) :
 	super("cChunkGenerator"),
 	m_Seed(0),  // Will be overwritten by the actual generator
-	m_Generator(NULL),
-	m_PluginInterface(NULL),
-	m_ChunkSink(NULL)
+	m_Generator(nullptr),
+	m_PluginInterface(nullptr),
+	m_ChunkSink(nullptr)
 {
 }
 
@@ -80,7 +80,7 @@ bool cChunkGenerator::Start(cPluginInterface & a_PluginInterface, cChunkSink & a
 		m_Generator = new cComposableGenerator(*this);
 	}
 
-	if (m_Generator == NULL)
+	if (m_Generator == nullptr)
 	{
 		LOGERROR("Generator could not start, aborting the server");
 		return false;
@@ -103,7 +103,7 @@ void cChunkGenerator::Stop(void)
 	Wait();
 
 	delete m_Generator;
-	m_Generator = NULL;
+	m_Generator = nullptr;
 }
 
 
@@ -144,7 +144,7 @@ void cChunkGenerator::QueueGenerateChunk(int a_ChunkX, int a_ChunkZ, bool a_Forc
 
 void cChunkGenerator::GenerateBiomes(int a_ChunkX, int a_ChunkZ, cChunkDef::BiomeMap & a_BiomeMap)
 {
-	if (m_Generator != NULL)
+	if (m_Generator != nullptr)
 	{
 		m_Generator->GenerateBiomes(a_ChunkX, a_ChunkZ, a_BiomeMap);
 	}
@@ -180,7 +180,7 @@ int cChunkGenerator::GetQueueLength(void)
 
 EMCSBiome cChunkGenerator::GetBiomeAt(int a_BlockX, int a_BlockZ)
 {
-	ASSERT(m_Generator != NULL);
+	ASSERT(m_Generator != nullptr);
 	return m_Generator->GetBiomeAt(a_BlockX, a_BlockZ);
 }
 
@@ -283,8 +283,8 @@ void cChunkGenerator::Execute(void)
 
 void cChunkGenerator::DoGenerate(int a_ChunkX, int a_ChunkZ)
 {
-	ASSERT(m_PluginInterface != NULL);
-	ASSERT(m_ChunkSink != NULL);
+	ASSERT(m_PluginInterface != nullptr);
+	ASSERT(m_ChunkSink != nullptr);
 	ASSERT(m_ChunkSink->IsChunkQueued(a_ChunkX, a_ChunkZ));
 
 	cChunkDesc ChunkDesc(a_ChunkX, a_ChunkZ);
diff --git a/src/Generating/CompoGen.cpp b/src/Generating/CompoGen.cpp
index 0105fdb70..2c88f23f1 100644
--- a/src/Generating/CompoGen.cpp
+++ b/src/Generating/CompoGen.cpp
@@ -687,9 +687,9 @@ cCompoGenCache::cCompoGenCache(cTerrainCompositionGenPtr a_Underlying, int a_Cac
 cCompoGenCache::~cCompoGenCache()
 {
 	delete[] m_CacheData;
-	m_CacheData = NULL;
+	m_CacheData = nullptr;
 	delete[] m_CacheOrder;
-	m_CacheOrder = NULL;
+	m_CacheOrder = nullptr;
 }
 
 
diff --git a/src/Generating/ComposableGenerator.cpp b/src/Generating/ComposableGenerator.cpp
index b5af4e96a..9a52588d5 100644
--- a/src/Generating/ComposableGenerator.cpp
+++ b/src/Generating/ComposableGenerator.cpp
@@ -48,7 +48,7 @@ cTerrainCompositionGenPtr cTerrainCompositionGen::CreateCompositionGen(cIniFile
 		CompoGenName = "Biomal";
 	}
 	
-	cTerrainCompositionGen * res = NULL;
+	cTerrainCompositionGen * res = nullptr;
 	if (NoCaseCompare(CompoGenName, "sameblock") == 0)
 	{
 		res = new cCompoGenSameBlock;
@@ -102,7 +102,7 @@ cTerrainCompositionGenPtr cTerrainCompositionGen::CreateCompositionGen(cIniFile
 		a_IniFile.SetValue("Generator", "CompositionGen", "Biomal");
 		return CreateCompositionGen(a_IniFile, a_BiomeGen, a_HeightGen, a_Seed);
 	}
-	ASSERT(res != NULL);
+	ASSERT(res != nullptr);
 	
 	// Read the settings from the ini file:
 	res->InitializeCompoGen(a_IniFile);
@@ -145,7 +145,7 @@ void cComposableGenerator::Initialize(cIniFile & a_IniFile)
 
 void cComposableGenerator::GenerateBiomes(int a_ChunkX, int a_ChunkZ, cChunkDef::BiomeMap & a_BiomeMap)
 {
-	if (m_BiomeGen != NULL)  // Quick fix for generator deinitializing before the world storage finishes loading
+	if (m_BiomeGen != nullptr)  // Quick fix for generator deinitializing before the world storage finishes loading
 	{
 		m_BiomeGen->GenBiomes(a_ChunkX, a_ChunkZ, a_BiomeMap);
 	}
diff --git a/src/Generating/DungeonRoomsFinisher.cpp b/src/Generating/DungeonRoomsFinisher.cpp
index 93fe8b472..3f328868d 100644
--- a/src/Generating/DungeonRoomsFinisher.cpp
+++ b/src/Generating/DungeonRoomsFinisher.cpp
@@ -198,7 +198,7 @@ protected:
 		} ;
 
 		cChestEntity * ChestEntity = (cChestEntity *)a_ChunkDesc.GetBlockEntity(RelX, m_FloorHeight + 1, RelZ);
-		ASSERT((ChestEntity != NULL) && (ChestEntity->GetBlockType() == E_BLOCK_CHEST));
+		ASSERT((ChestEntity != nullptr) && (ChestEntity->GetBlockType() == E_BLOCK_CHEST));
 		cNoise Noise(a_ChunkDesc.GetChunkX() ^ a_ChunkDesc.GetChunkZ());
 		int NumSlots = 3 + ((Noise.IntNoise3DInt(a_Chest.x, a_Chest.y, a_Chest.z) / 11) % 4);
 		int Seed = Noise.IntNoise2DInt(RelX, RelZ);
diff --git a/src/Generating/GridStructGen.cpp b/src/Generating/GridStructGen.cpp
index 7090f14b1..3c08c1a39 100644
--- a/src/Generating/GridStructGen.cpp
+++ b/src/Generating/GridStructGen.cpp
@@ -135,7 +135,7 @@ void cGridStructGen::GetStructuresForChunk(int a_ChunkX, int a_ChunkZ, cStructur
 				int OriginX = GridX + ((m_Noise.IntNoise2DInt(GridX + 3, GridZ + 5) / 7) % (m_MaxOffsetX * 2)) - m_MaxOffsetX;
 				int OriginZ = GridZ + ((m_Noise.IntNoise2DInt(GridX + 5, GridZ + 3) / 7) % (m_MaxOffsetZ * 2)) - m_MaxOffsetZ;
 				cStructurePtr Structure = CreateStructure(GridX, GridZ, OriginX, OriginZ);
-				if (Structure.get() == NULL)
+				if (Structure.get() == nullptr)
 				{
 					Structure.reset(new cEmptyStructure(GridX, GridZ, OriginX, OriginZ));
 				}
diff --git a/src/Generating/HeiGen.cpp b/src/Generating/HeiGen.cpp
index b7d4b337c..acfefaefc 100644
--- a/src/Generating/HeiGen.cpp
+++ b/src/Generating/HeiGen.cpp
@@ -29,7 +29,7 @@ cTerrainHeightGenPtr cTerrainHeightGen::CreateHeightGen(cIniFile & a_IniFile, cB
 	}
 	
 	a_CacheOffByDefault = false;
-	cTerrainHeightGen * res = NULL;
+	cTerrainHeightGen * res = nullptr;
 	if (NoCaseCompare(HeightGenName, "flat") == 0)
 	{
 		res = new cHeiGenFlat;
@@ -142,9 +142,9 @@ cHeiGenCache::cHeiGenCache(cTerrainHeightGenPtr a_HeiGenToCache, int a_CacheSize
 cHeiGenCache::~cHeiGenCache()
 {
 	delete[] m_CacheData;
-	m_CacheData = NULL;
+	m_CacheData = nullptr;
 	delete[] m_CacheOrder;
-	m_CacheOrder = NULL;
+	m_CacheOrder = nullptr;
 }
 
 
diff --git a/src/Generating/MineShafts.cpp b/src/Generating/MineShafts.cpp
index 0532aff39..55b3b64dd 100644
--- a/src/Generating/MineShafts.cpp
+++ b/src/Generating/MineShafts.cpp
@@ -112,7 +112,7 @@ class cMineShaftCorridor :
 public:
 	/** Creates a new Corridor attached to the specified pivot point and direction.
 	Checks all ParentSystem's objects and disallows intersecting. Initializes the new object to fit.
-	May return NULL if cannot fit.
+	May return nullptr if cannot fit.
 	*/
 	static cMineShaft * CreateAndFit(
 		cStructGenMineShafts::cMineShaftSystem & a_ParentSystem,
@@ -165,7 +165,7 @@ class cMineShaftCrossing :
 public:
 	/** Creates a new Crossing attached to the specified pivot point and direction.
 	Checks all ParentSystem's objects and disallows intersecting. Initializes the new object to fit.
-	May return NULL if cannot fit.
+	May return nullptr if cannot fit.
 	*/
 	static cMineShaft * CreateAndFit(
 		cStructGenMineShafts::cMineShaftSystem & a_ParentSystem,
@@ -199,7 +199,7 @@ public:
 
 	/** Creates a new Staircase attached to the specified pivot point and direction.
 	Checks all ParentSystem's objects and disallows intersecting. Initializes the new object to fit.
-	May return NULL if cannot fit.
+	May return nullptr if cannot fit.
 	*/
 	static cMineShaft * CreateAndFit(
 		cStructGenMineShafts::cMineShaftSystem & a_ParentSystem,
@@ -351,7 +351,7 @@ void cStructGenMineShafts::cMineShaftSystem::AppendBranch(
 		return;
 	}
 
-	cMineShaft * Next = NULL;
+	cMineShaft * Next = nullptr;
 	int rnd = (a_Noise.IntNoise3DInt(a_PivotX, a_PivotY + a_RecursionLevel * 16, a_PivotZ) / 13) % m_ProbLevelStaircase;
 	if (rnd < m_ProbLevelCorridor)
 	{
@@ -365,7 +365,7 @@ void cStructGenMineShafts::cMineShaftSystem::AppendBranch(
 	{
 		Next = cMineShaftStaircase::CreateAndFit(*this, a_PivotX, a_PivotY, a_PivotZ, a_Direction, a_Noise);
 	}
-	if (Next == NULL)
+	if (Next == nullptr)
 	{
 		return;
 	}
@@ -552,7 +552,7 @@ cMineShaft * cMineShaftCorridor::CreateAndFit(
 	}
 	if (!a_ParentSystem.CanAppend(BoundingBox))
 	{
-		return NULL;
+		return nullptr;
 	}
 	return new cMineShaftCorridor(a_ParentSystem, BoundingBox, NumSegments, a_Direction, a_Noise);
 }
@@ -796,7 +796,7 @@ void cMineShaftCorridor::PlaceChest(cChunkDesc & a_ChunkDesc)
 	{
 		a_ChunkDesc.SetBlockTypeMeta(x, m_BoundingBox.p1.y + 1, z, E_BLOCK_CHEST, Meta);
 		cChestEntity * ChestEntity = (cChestEntity *)a_ChunkDesc.GetBlockEntity(x, m_BoundingBox.p1.y + 1, z);
-		ASSERT((ChestEntity != NULL) && (ChestEntity->GetBlockType() == E_BLOCK_CHEST));
+		ASSERT((ChestEntity != nullptr) && (ChestEntity->GetBlockType() == E_BLOCK_CHEST));
 		cNoise Noise(a_ChunkDesc.GetChunkX() ^ a_ChunkDesc.GetChunkZ());
 		int NumSlots = 3 + ((Noise.IntNoise3DInt(x, m_BoundingBox.p1.y, z) / 11) % 4);
 		int Seed = Noise.IntNoise2DInt(x, z);
@@ -1006,7 +1006,7 @@ cMineShaft * cMineShaftCrossing::CreateAndFit(
 	}
 	if (!a_ParentSystem.CanAppend(BoundingBox))
 	{
-		return NULL;
+		return nullptr;
 	}
 	return new cMineShaftCrossing(a_ParentSystem, BoundingBox);
 }
@@ -1157,7 +1157,7 @@ cMineShaft * cMineShaftStaircase::CreateAndFit(
 	}
 	if (!a_ParentSystem.CanAppend(Box))
 	{
-		return NULL;
+		return nullptr;
 	}
 	return new cMineShaftStaircase(a_ParentSystem, Box, a_Direction, Slope);
 }
diff --git a/src/Generating/PieceGenerator.cpp b/src/Generating/PieceGenerator.cpp
index ae4b6e36c..97aa646fc 100644
--- a/src/Generating/PieceGenerator.cpp
+++ b/src/Generating/PieceGenerator.cpp
@@ -289,7 +289,7 @@ cPlacedPiece::cPlacedPiece(const cPlacedPiece * a_Parent, const cPiece & a_Piece
 	m_NumCCWRotations(a_NumCCWRotations),
 	m_HasBeenMovedToGround(false)
 {
-	m_Depth = (m_Parent == NULL) ? 0 : (m_Parent->GetDepth() + 1);
+	m_Depth = (m_Parent == nullptr) ? 0 : (m_Parent->GetDepth() + 1);
 	m_HitBox = a_Piece.RotateMoveHitBox(a_NumCCWRotations, a_Coords.x, a_Coords.y, a_Coords.z);
 	m_HitBox.Sort();
 }
@@ -402,7 +402,7 @@ cPlacedPiece * cPieceGenerator::PlaceStartingPiece(int a_BlockX, int a_BlockY, i
 	}
 	int Rotation = Rotations[rnd % NumRotations];
 	
-	cPlacedPiece * res = new cPlacedPiece(NULL, *StartingPiece, Vector3i(a_BlockX, a_BlockY, a_BlockZ), Rotation);
+	cPlacedPiece * res = new cPlacedPiece(nullptr, *StartingPiece, Vector3i(a_BlockX, a_BlockY, a_BlockZ), Rotation);
 
 	// Place the piece's connectors into a_OutConnectors:
 	const cPiece::cConnectors & Conn = StartingPiece->GetConnectors();
diff --git a/src/Generating/Prefab.cpp b/src/Generating/Prefab.cpp
index 6da3c3d10..761986690 100644
--- a/src/Generating/Prefab.cpp
+++ b/src/Generating/Prefab.cpp
@@ -328,7 +328,7 @@ void cPrefab::AddConnector(int a_RelX, int a_RelY, int a_RelZ, eBlockFace a_Dire
 
 void cPrefab::ParseCharMap(CharMap & a_CharMapOut, const char * a_CharMapDef)
 {
-	ASSERT(a_CharMapDef != NULL);
+	ASSERT(a_CharMapDef != nullptr);
 	
 	// Initialize the charmap to all-invalid values:
 	for (size_t i = 0; i < ARRAYCOUNT(a_CharMapOut); i++)
@@ -389,7 +389,7 @@ void cPrefab::ParseBlockImage(const CharMap & a_CharMap, const char * a_BlockIma
 
 void cPrefab::ParseConnectors(const char * a_ConnectorsDef)
 {
-	ASSERT(a_ConnectorsDef != NULL);
+	ASSERT(a_ConnectorsDef != nullptr);
 	
 	AStringVector Lines = StringSplitAndTrim(a_ConnectorsDef, "\n");
 	for (AStringVector::const_iterator itr = Lines.begin(), end = Lines.end(); itr != end; ++itr)
@@ -436,7 +436,7 @@ void cPrefab::ParseConnectors(const char * a_ConnectorsDef)
 void cPrefab::ParseDepthWeight(const char * a_DepthWeightDef)
 {
 	// The member needn't be defined at all, if so, skip:
-	if (a_DepthWeightDef == NULL)
+	if (a_DepthWeightDef == nullptr)
 	{
 		return;
 	}
diff --git a/src/Generating/PrefabPiecePool.cpp b/src/Generating/PrefabPiecePool.cpp
index 122b9d2af..895555ef8 100644
--- a/src/Generating/PrefabPiecePool.cpp
+++ b/src/Generating/PrefabPiecePool.cpp
@@ -16,7 +16,7 @@ cPrefabPiecePool::cPrefabPiecePool(
 )
 {
 	AddPieceDefs(a_PieceDefs, a_NumPieceDefs);
-	if (a_StartingPieceDefs != NULL)
+	if (a_StartingPieceDefs != nullptr)
 	{
 		AddStartingPieceDefs(a_StartingPieceDefs, a_NumStartingPieceDefs);
 	}
@@ -56,7 +56,7 @@ void cPrefabPiecePool::Clear(void)
 
 void cPrefabPiecePool::AddPieceDefs(const cPrefab::sDef * a_PieceDefs, size_t a_NumPieceDefs)
 {
-	ASSERT(a_PieceDefs != NULL);
+	ASSERT(a_PieceDefs != nullptr);
 	for (size_t i = 0; i < a_NumPieceDefs; i++)
 	{
 		cPrefab * Prefab = new cPrefab(a_PieceDefs[i]);
@@ -71,7 +71,7 @@ void cPrefabPiecePool::AddPieceDefs(const cPrefab::sDef * a_PieceDefs, size_t a_
 
 void cPrefabPiecePool::AddStartingPieceDefs(const cPrefab::sDef * a_StartingPieceDefs, size_t a_NumStartingPieceDefs)
 {
-	ASSERT(a_StartingPieceDefs != NULL);
+	ASSERT(a_StartingPieceDefs != nullptr);
 	for (size_t i = 0; i < a_NumStartingPieceDefs; i++)
 	{
 		cPrefab * Prefab = new cPrefab(a_StartingPieceDefs[i]);
diff --git a/src/Generating/VillageGen.cpp b/src/Generating/VillageGen.cpp
index 1806fd427..a9b359b6a 100644
--- a/src/Generating/VillageGen.cpp
+++ b/src/Generating/VillageGen.cpp
@@ -385,7 +385,7 @@ cGridStructGen::cStructurePtr cVillageGen::CreateStructure(int a_GridX, int a_Gr
 
 	// Check if all the biomes are village-friendly:
 	// If just one is not, no village is created, because it's likely that an unfriendly biome is too close
-	cVillagePiecePool * VillagePrefabs = NULL;
+	cVillagePiecePool * VillagePrefabs = nullptr;
 	BLOCKTYPE RoadBlock = E_BLOCK_GRAVEL;
 	BLOCKTYPE WaterRoadBlock = E_BLOCK_PLANKS;
 	int rnd = m_Noise.IntNoise2DInt(a_OriginX, a_OriginZ) / 11;
@@ -432,7 +432,7 @@ cGridStructGen::cStructurePtr cVillageGen::CreateStructure(int a_GridX, int a_Gr
 	}
 	
 	// Create a village based on the chosen prefabs:
-	if (VillagePrefabs == NULL)
+	if (VillagePrefabs == nullptr)
 	{
 		return cStructurePtr();
 	}
diff --git a/src/HTTPServer/HTTPConnection.cpp b/src/HTTPServer/HTTPConnection.cpp
index bf46bb241..d5dbf0199 100644
--- a/src/HTTPServer/HTTPConnection.cpp
+++ b/src/HTTPServer/HTTPConnection.cpp
@@ -15,7 +15,7 @@
 cHTTPConnection::cHTTPConnection(cHTTPServer & a_HTTPServer) :
 	m_HTTPServer(a_HTTPServer),
 	m_State(wcsRecvHeaders),
-	m_CurrentRequest(NULL),
+	m_CurrentRequest(nullptr),
 	m_CurrentRequestBodyRemaining(0)
 {
 	// LOGD("HTTP: New connection at %p", this);
@@ -29,7 +29,7 @@ cHTTPConnection::~cHTTPConnection()
 {
 	// LOGD("HTTP: Connection deleting: %p", this);
 	delete m_CurrentRequest;
-	m_CurrentRequest = NULL;
+	m_CurrentRequest = nullptr;
 }
 
 
@@ -136,7 +136,7 @@ void cHTTPConnection::AwaitNextRequest(void)
 
 void cHTTPConnection::Terminate(void)
 {
-	if (m_CurrentRequest != NULL)
+	if (m_CurrentRequest != nullptr)
 	{
 		m_HTTPServer.RequestFinished(*this, *m_CurrentRequest);
 	}
@@ -153,7 +153,7 @@ bool cHTTPConnection::DataReceived(const char * a_Data, size_t a_Size)
 	{
 		case wcsRecvHeaders:
 		{
-			if (m_CurrentRequest == NULL)
+			if (m_CurrentRequest == nullptr)
 			{
 				m_CurrentRequest = new cHTTPRequest;
 			}
@@ -162,7 +162,7 @@ bool cHTTPConnection::DataReceived(const char * a_Data, size_t a_Size)
 			if (BytesConsumed == AString::npos)
 			{
 				delete m_CurrentRequest;
-				m_CurrentRequest = NULL;
+				m_CurrentRequest = nullptr;
 				m_State = wcsInvalid;
 				m_HTTPServer.CloseConnection(*this);
 				return true;
@@ -196,7 +196,7 @@ bool cHTTPConnection::DataReceived(const char * a_Data, size_t a_Size)
 
 		case wcsRecvBody:
 		{
-			ASSERT(m_CurrentRequest != NULL);
+			ASSERT(m_CurrentRequest != nullptr);
 			if (m_CurrentRequestBodyRemaining > 0)
 			{
 				size_t BytesToConsume = std::min(m_CurrentRequestBodyRemaining, (size_t)a_Size);
@@ -214,7 +214,7 @@ bool cHTTPConnection::DataReceived(const char * a_Data, size_t a_Size)
 					return true;
 				}
 				delete m_CurrentRequest;
-				m_CurrentRequest = NULL;
+				m_CurrentRequest = nullptr;
 			}
 			break;
 		}
@@ -243,7 +243,7 @@ void cHTTPConnection::GetOutgoingData(AString & a_Data)
 
 void cHTTPConnection::SocketClosed(void)
 {
-	if (m_CurrentRequest != NULL)
+	if (m_CurrentRequest != nullptr)
 	{
 		m_HTTPServer.RequestFinished(*this, *m_CurrentRequest);
 	}
diff --git a/src/HTTPServer/HTTPConnection.h b/src/HTTPServer/HTTPConnection.h
index 6ea8a1ae8..ccbf26466 100644
--- a/src/HTTPServer/HTTPConnection.h
+++ b/src/HTTPServer/HTTPConnection.h
@@ -31,10 +31,10 @@ public:
 	
 	enum eState
 	{
-		wcsRecvHeaders,  ///< Receiving request headers (m_CurrentRequest is created if NULL)
+		wcsRecvHeaders,  ///< Receiving request headers (m_CurrentRequest is created if nullptr)
 		wcsRecvBody,     ///< Receiving request body    (m_CurrentRequest is valid)
-		wcsRecvIdle,     ///< Has received the entire body, waiting to send the response (m_CurrentRequest == NULL)
-		wcsSendingResp,  ///< Sending response body     (m_CurrentRequest == NULL)
+		wcsRecvIdle,     ///< Has received the entire body, waiting to send the response (m_CurrentRequest == nullptr)
+		wcsSendingResp,  ///< Sending response body     (m_CurrentRequest == nullptr)
 		wcsInvalid,      ///< The request was malformed, the connection is closing
 	} ;
 	
diff --git a/src/HTTPServer/HTTPFormParser.cpp b/src/HTTPServer/HTTPFormParser.cpp
index c50c6dcf2..72872078b 100644
--- a/src/HTTPServer/HTTPFormParser.cpp
+++ b/src/HTTPServer/HTTPFormParser.cpp
@@ -86,7 +86,7 @@ void cHTTPFormParser::Parse(const char * a_Data, size_t a_Size)
 		}
 		case fpkMultipart:
 		{
-			ASSERT(m_MultipartParser.get() != NULL);
+			ASSERT(m_MultipartParser.get() != nullptr);
 			m_MultipartParser->Parse(a_Data, a_Size);
 			break;
 		}
@@ -145,7 +145,7 @@ bool cHTTPFormParser::HasFormData(const cHTTPRequest & a_Request)
 
 void cHTTPFormParser::BeginMultipart(const cHTTPRequest & a_Request)
 {
-	ASSERT(m_MultipartParser.get() == NULL);
+	ASSERT(m_MultipartParser.get() == nullptr);
 	m_MultipartParser.reset(new cMultipartParser(a_Request.GetContentType(), *this));
 }
 
diff --git a/src/HTTPServer/HTTPMessage.cpp b/src/HTTPServer/HTTPMessage.cpp
index 65d73fd87..f6c0204ae 100644
--- a/src/HTTPServer/HTTPMessage.cpp
+++ b/src/HTTPServer/HTTPMessage.cpp
@@ -70,7 +70,7 @@ cHTTPRequest::cHTTPRequest(void) :
 	super(mkRequest),
 	m_EnvelopeParser(*this),
 	m_IsValid(true),
-	m_UserData(NULL),
+	m_UserData(nullptr),
 	m_HasAuth(false),
 	m_AllowKeepAlive(false)
 {
diff --git a/src/HTTPServer/HTTPServer.cpp b/src/HTTPServer/HTTPServer.cpp
index 0c41b54b2..9ab030a1f 100644
--- a/src/HTTPServer/HTTPServer.cpp
+++ b/src/HTTPServer/HTTPServer.cpp
@@ -44,7 +44,7 @@ class cDebugCallbacks :
 			UNUSED(a_Connection);
 			
 			cHTTPFormParser * FormParser = (cHTTPFormParser *)(a_Request.GetUserData());
-			if (FormParser != NULL)
+			if (FormParser != nullptr)
 			{
 				FormParser->Parse(a_Data, a_Size);
 			}
@@ -54,7 +54,7 @@ class cDebugCallbacks :
 		virtual void OnRequestFinished(cHTTPConnection & a_Connection, cHTTPRequest & a_Request) override
 		{
 			cHTTPFormParser * FormParser = (cHTTPFormParser *)(a_Request.GetUserData());
-			if (FormParser != NULL)
+			if (FormParser != nullptr)
 			{
 				if (FormParser->Finish())
 				{
@@ -124,7 +124,7 @@ class cDebugCallbacks :
 cHTTPServer::cHTTPServer(void) :
 	m_ListenThreadIPv4(*this, cSocket::IPv4, "WebServer"),
 	m_ListenThreadIPv6(*this, cSocket::IPv6, "WebServer"),
-	m_Callbacks(NULL)
+	m_Callbacks(nullptr)
 {
 }
 
@@ -168,7 +168,7 @@ bool cHTTPServer::Initialize(const AString & a_PortsIPv4, const AString & a_Port
 	}
 
 	// Notify the admin about the HTTPS / HTTP status
-	if (m_Cert.get() == NULL)
+	if (m_Cert.get() == nullptr)
 	{
 		LOGWARNING("WebServer: The server is running in unsecured HTTP mode.");
 		LOGINFO("Put a valid HTTPS certificate in file 'webadmin/httpscert.crt' and its corresponding private key to 'webadmin/httpskey.pem' (without any password) to enable HTTPS support");
@@ -235,7 +235,7 @@ void cHTTPServer::Stop(void)
 void cHTTPServer::OnConnectionAccepted(cSocket & a_Socket)
 {
 	cHTTPConnection * Connection;
-	if (m_Cert.get() != NULL)
+	if (m_Cert.get() != nullptr)
 	{
 		Connection = new cSslHTTPConnection(*this, m_Cert, m_CertPrivKey);
 	}
diff --git a/src/Inventory.cpp b/src/Inventory.cpp
index 832a079bc..51ac32da9 100644
--- a/src/Inventory.cpp
+++ b/src/Inventory.cpp
@@ -220,7 +220,7 @@ void cInventory::SetSlot(int a_SlotNum, const cItem & a_Item)
 
 	int GridSlotNum = 0;
 	cItemGrid * Grid = GetGridForSlotNum(a_SlotNum, GridSlotNum);
-	if (Grid == NULL)
+	if (Grid == nullptr)
 	{
 		LOGWARNING("%s(%d): requesting an invalid itemgrid. Ignoring.", __FUNCTION__, a_SlotNum);
 		return;
@@ -278,7 +278,7 @@ const cItem & cInventory::GetSlot(int a_SlotNum) const
 	}
 	int GridSlotNum = 0;
 	const cItemGrid * Grid = GetGridForSlotNum(a_SlotNum, GridSlotNum);
-	if (Grid == NULL)
+	if (Grid == nullptr)
 	{
 		// Something went wrong, but we don't know what. We must return a value, so return the first inventory slot
 		LOGWARNING("%s(%d): requesting an invalid ItemGrid, returning the first inventory slot instead.", __FUNCTION__, a_SlotNum);
@@ -372,7 +372,7 @@ int cInventory::ChangeSlotCount(int a_SlotNum, int a_AddToCount)
 {
 	int GridSlotNum = 0;
 	cItemGrid * Grid = GetGridForSlotNum(a_SlotNum, GridSlotNum);
-	if (Grid == NULL)
+	if (Grid == nullptr)
 	{
 		LOGWARNING("%s: invalid slot number, expected 0 .. %d, got %d; ignoring", __FUNCTION__, invNumSlots, a_SlotNum);
 		return -1;
@@ -398,7 +398,7 @@ bool cInventory::DamageItem(int a_SlotNum, short a_Amount)
 	
 	int GridSlotNum = 0;
 	cItemGrid * Grid = GetGridForSlotNum(a_SlotNum, GridSlotNum);
-	if (Grid == NULL)
+	if (Grid == nullptr)
 	{
 		LOGWARNING("%s(%d, %d): requesting an invalid grid, ignoring.", __FUNCTION__, a_SlotNum, a_Amount);
 		return false;
@@ -640,7 +640,7 @@ bool cInventory::LoadFromJson(Json::Value & a_Value)
 		
 		int GridSlotNum = 0;
 		cItemGrid * Grid = GetGridForSlotNum(SlotIdx - 5, GridSlotNum);
-		ASSERT(Grid != NULL);
+		ASSERT(Grid != nullptr);
 		Grid->SetSlot(GridSlotNum, Item);
 	}  // for itr - a_Value[]
 	return true;
@@ -708,7 +708,7 @@ void cInventory::OnSlotChanged(cItemGrid * a_ItemGrid, int a_SlotNum)
 	
 	// Armor update needs broadcast to other players:
 	cWorld * World = m_Owner.GetWorld();
-	if ((a_ItemGrid == &m_ArmorSlots) && (World != NULL))
+	if ((a_ItemGrid == &m_ArmorSlots) && (World != nullptr))
 	{
 		World->BroadcastEntityEquipment(
 			m_Owner, ArmorSlotNumToEntityEquipmentID(a_SlotNum),
diff --git a/src/Inventory.h b/src/Inventory.h
index 5628fb0da..4e76bc0d3 100644
--- a/src/Inventory.h
+++ b/src/Inventory.h
@@ -179,10 +179,10 @@ protected:
 
 	cPlayer & m_Owner;
 	
-	/** Returns the ItemGrid and the (grid-local) slot number for a (global) slot number; return NULL for invalid SlotNum */
+	/** Returns the ItemGrid and the (grid-local) slot number for a (global) slot number; return nullptr for invalid SlotNum */
 	const cItemGrid * GetGridForSlotNum(int a_SlotNum, int & a_GridSlotNum) const;
 	
-	/** Returns the ItemGrid and the (grid-local) slot number for a (global) slot number; return NULL for invalid SlotNum */
+	/** Returns the ItemGrid and the (grid-local) slot number for a (global) slot number; return nullptr for invalid SlotNum */
 	cItemGrid * GetGridForSlotNum(int a_SlotNum, int & a_GridSlotNum);
 	
 	// cItemGrid::cListener override:
diff --git a/src/Item.cpp b/src/Item.cpp
index ebdf99ca5..36c444328 100644
--- a/src/Item.cpp
+++ b/src/Item.cpp
@@ -391,7 +391,7 @@ cItem * cItems::Get(int a_Idx)
 	if ((a_Idx < 0) || (a_Idx >= (int)size()))
 	{
 		LOGWARNING("cItems: Attempt to get an out-of-bounds item at index %d; there are currently " SIZE_T_FMT " items. Returning a nil.", a_Idx, size());
-		return NULL;
+		return nullptr;
 	}
 	return &at(a_Idx);
 }
diff --git a/src/ItemGrid.cpp b/src/ItemGrid.cpp
index 1977216d8..55fb36a17 100644
--- a/src/ItemGrid.cpp
+++ b/src/ItemGrid.cpp
@@ -28,7 +28,7 @@ cItemGrid::cItemGrid(int a_Width, int a_Height) :
 cItemGrid::~cItemGrid()
 {
 	delete[] m_Slots;
-	m_Slots = NULL;
+	m_Slots = nullptr;
 }
 
 
diff --git a/src/Items/ItemBow.h b/src/Items/ItemBow.h
index f29cc5d59..cf2fe9ad2 100644
--- a/src/Items/ItemBow.h
+++ b/src/Items/ItemBow.h
@@ -29,7 +29,7 @@ public:
 	
 	virtual bool OnItemUse(cWorld * a_World, cPlayer * a_Player, const cItem & a_Item, int a_BlockX, int a_BlockY, int a_BlockZ, eBlockFace a_Dir) override
 	{
-		ASSERT(a_Player != NULL);
+		ASSERT(a_Player != nullptr);
 		
 		// Check if the player has an arrow in the inventory, or is in Creative:
 		if (!(a_Player->IsGameModeCreative() || a_Player->GetInventory().HasItems(cItem(E_ITEM_ARROW))))
@@ -45,7 +45,7 @@ public:
 	virtual void OnItemShoot(cPlayer * a_Player, int a_BlockX, int a_BlockY, int a_BlockZ, eBlockFace a_BlockFace) override
 	{
 		// Actual shot - produce the arrow with speed based on the ticks that the bow was charged
-		ASSERT(a_Player != NULL);
+		ASSERT(a_Player != nullptr);
 
 		int BowCharge = a_Player->FinishChargingBow();
 		double Force = (double)BowCharge / 20.0;
@@ -65,14 +65,14 @@ public:
 
 		// Create the arrow entity:
 		cArrowEntity * Arrow = new cArrowEntity(*a_Player, Force * 2);
-		if (Arrow == NULL)
+		if (Arrow == nullptr)
 		{
 			return;
 		}
 		if (!Arrow->Initialize(*a_Player->GetWorld()))
 		{
 			delete Arrow;
-			Arrow = NULL;
+			Arrow = nullptr;
 			return;
 		}
 		a_Player->GetWorld()->BroadcastSoundEffect("random.bow", a_Player->GetPosX(), a_Player->GetPosY(), a_Player->GetPosZ(), 0.5, (float)Force);
diff --git a/src/Items/ItemEmptyMap.h b/src/Items/ItemEmptyMap.h
index 953673382..9238d771b 100644
--- a/src/Items/ItemEmptyMap.h
+++ b/src/Items/ItemEmptyMap.h
@@ -50,7 +50,7 @@ public:
 			return true;
 		}
 
-		if (NewMap == NULL)
+		if (NewMap == nullptr)
 		{
 			return true;
 		}
diff --git a/src/Items/ItemHandler.cpp b/src/Items/ItemHandler.cpp
index f1f1ddcc5..9272a723d 100644
--- a/src/Items/ItemHandler.cpp
+++ b/src/Items/ItemHandler.cpp
@@ -83,7 +83,7 @@ cItemHandler * cItemHandler::GetItemHandler(int a_ItemType)
 		memset(m_ItemHandler, 0, sizeof(m_ItemHandler));
 		m_HandlerInitialized = true;
 	}
-	if (m_ItemHandler[a_ItemType] == NULL)
+	if (m_ItemHandler[a_ItemType] == nullptr)
 	{
 		m_ItemHandler[a_ItemType] = CreateItemHandler(a_ItemType);
 	}
@@ -278,7 +278,7 @@ void cItemHandler::Deinit()
 	for (int i = 0; i < 2267; i++)
 	{
 		delete m_ItemHandler[i];
-		m_ItemHandler[i] = NULL;
+		m_ItemHandler[i] = nullptr;
 	}
 	memset(m_ItemHandler, 0, sizeof(m_ItemHandler));  // Don't leave any dangling pointers around, just in case
 	m_HandlerInitialized = false;
diff --git a/src/Items/ItemItemFrame.h b/src/Items/ItemItemFrame.h
index 87e20ecf0..5d22c1cb8 100644
--- a/src/Items/ItemItemFrame.h
+++ b/src/Items/ItemItemFrame.h
@@ -37,7 +37,7 @@ public:
 			if (!ItemFrame->Initialize(*a_World))
 			{
 				delete ItemFrame;
-				ItemFrame = NULL;
+				ItemFrame = nullptr;
 				return false;
 			}
 
diff --git a/src/Items/ItemMap.h b/src/Items/ItemMap.h
index 056fe0fe7..2dbbb3dc0 100644
--- a/src/Items/ItemMap.h
+++ b/src/Items/ItemMap.h
@@ -31,7 +31,7 @@ public:
 	{
 		cMap * Map = a_World->GetMapManager().GetMapData((unsigned)a_Item.m_ItemDamage);
 
-		if (Map == NULL)
+		if (Map == nullptr)
 		{
 			return;
 		}
diff --git a/src/Items/ItemMinecart.h b/src/Items/ItemMinecart.h
index 63038de51..ed0a4711c 100644
--- a/src/Items/ItemMinecart.h
+++ b/src/Items/ItemMinecart.h
@@ -56,7 +56,7 @@ public:
 		double x = (double)a_BlockX + 0.5;
 		double y = (double)a_BlockY + 0.5;
 		double z = (double)a_BlockZ + 0.5;
-		cMinecart * Minecart = NULL;
+		cMinecart * Minecart = nullptr;
 		switch (m_ItemType)
 		{
 			case E_ITEM_MINECART:             Minecart = new cRideableMinecart     (x, y, z, cItem(), 1); break;
diff --git a/src/LeakFinder.h b/src/LeakFinder.h
index e63b9ec5d..ceaa53782 100644
--- a/src/LeakFinder.h
+++ b/src/LeakFinder.h
@@ -68,7 +68,7 @@ public:
     LeakFinderShowCompleteCallstack = 0x1000
   } LeakFinderOptions;
 
-  LeakFinderOutput(int options = OptionsAll,  LPCSTR szSymPath = NULL);
+  LeakFinderOutput(int options = OptionsAll,  LPCSTR szSymPath = nullptr);
   virtual void OnLeakSearchStart(LPCSTR sszLeakFinderName);
   virtual void OnLeakStartEntry(LPCSTR szKeyName, SIZE_T nDataSize);
 protected:
@@ -110,7 +110,7 @@ class ZZZ_LeakFinder
 public:
   ZZZ_LeakFinder()
   {
-    m_pXml = NULL;
+    m_pXml = nullptr;
 #ifdef XML_LEAK_FINDER
     m_pXml = new LeakFinderXmlOutput();
 #endif
@@ -119,7 +119,7 @@ public:
   ~ZZZ_LeakFinder()
   {
     DeinitLeakFinder(m_pXml);
-    if (m_pXml != NULL) delete m_pXml;
+    if (m_pXml != nullptr) delete m_pXml;
   }
 protected:
   LeakFinderXmlOutput *m_pXml;
@@ -148,7 +148,7 @@ ZZZ_LeakFinder zzz_LeakFinder;
 
 
 
-extern void DumpUsedMemory(LeakFinderOutput * output = NULL);
+extern void DumpUsedMemory(LeakFinderOutput * output = nullptr);
 
 
 
diff --git a/src/LightingThread.cpp b/src/LightingThread.cpp
index 652b03e46..ae5e746e7 100644
--- a/src/LightingThread.cpp
+++ b/src/LightingThread.cpp
@@ -91,7 +91,7 @@ public:
 
 cLightingThread::cLightingThread(void) :
 	super("cLightingThread"),
-	m_World(NULL),
+	m_World(nullptr),
 	m_MaxHeight(0),
 	m_NumSeeds(0)
 {
@@ -112,7 +112,7 @@ cLightingThread::~cLightingThread()
 
 bool cLightingThread::Start(cWorld * a_World)
 {
-	ASSERT(m_World == NULL);  // Not started yet
+	ASSERT(m_World == nullptr);  // Not started yet
 	m_World = a_World;
 	
 	return super::Start();
@@ -151,7 +151,7 @@ void cLightingThread::Stop(void)
 
 void cLightingThread::QueueChunk(int a_ChunkX, int a_ChunkZ, cChunkCoordCallback * a_CallbackAfter)
 {
-	ASSERT(m_World != NULL);  // Did you call Start() properly?
+	ASSERT(m_World != nullptr);  // Did you call Start() properly?
 	
 	cChunkStay * ChunkStay = new cLightingChunkStay(*this, a_ChunkX, a_ChunkZ, a_CallbackAfter);
 	{
@@ -310,7 +310,7 @@ void cLightingThread::LightChunk(cLightingChunkStay & a_Item)
 	
 	m_World->ChunkLighted(a_Item.m_ChunkX, a_Item.m_ChunkZ, BlockLight, SkyLight);
 
-	if (a_Item.m_CallbackAfter != NULL)
+	if (a_Item.m_CallbackAfter != nullptr)
 	{
 		a_Item.m_CallbackAfter->Call(a_Item.m_ChunkX, a_Item.m_ChunkZ);
 	}
diff --git a/src/LightingThread.h b/src/LightingThread.h
index f71d2cf1a..87eb9c6d8 100644
--- a/src/LightingThread.h
+++ b/src/LightingThread.h
@@ -61,7 +61,7 @@ public:
 	void Stop(void);
 	
 	/** Queues the entire chunk for lighting */
-	void QueueChunk(int a_ChunkX, int a_ChunkZ, cChunkCoordCallback * a_CallbackAfter = NULL);
+	void QueueChunk(int a_ChunkX, int a_ChunkZ, cChunkCoordCallback * a_CallbackAfter = nullptr);
 	
 	/** Blocks until the queue is empty or the thread is terminated */
 	void WaitForQueueEmpty(void);
diff --git a/src/LineBlockTracer.cpp b/src/LineBlockTracer.cpp
index 1b42081c2..90f97cd23 100644
--- a/src/LineBlockTracer.cpp
+++ b/src/LineBlockTracer.cpp
@@ -198,7 +198,7 @@ bool cLineBlockTracer::Item(cChunk * a_Chunk)
 	for (;;)
 	{
 		// Report the current block through the callbacks:
-		if (a_Chunk == NULL)
+		if (a_Chunk == nullptr)
 		{
 			m_Callbacks->OnNoChunk();
 			return false;
@@ -228,7 +228,7 @@ bool cLineBlockTracer::Item(cChunk * a_Chunk)
 
 		// Update the current chunk
 		a_Chunk = a_Chunk->GetNeighborChunk(m_CurrentX, m_CurrentZ);
-		if (a_Chunk == NULL)
+		if (a_Chunk == nullptr)
 		{
 			m_Callbacks->OnNoChunk();
 			return false;
diff --git a/src/LinearUpscale.h b/src/LinearUpscale.h
index a49f4bdf9..1b0fbd89a 100644
--- a/src/LinearUpscale.h
+++ b/src/LinearUpscale.h
@@ -95,8 +95,8 @@ template <typename TYPE> void LinearUpscale2DArray(
 	const int MAX_UPSCALE_X = 128;
 	const int MAX_UPSCALE_Y = 128;
 
-	ASSERT(a_Src != NULL);
-	ASSERT(a_Dst != NULL);
+	ASSERT(a_Src != nullptr);
+	ASSERT(a_Dst != nullptr);
 	ASSERT(a_SrcSizeX > 0);
 	ASSERT(a_SrcSizeY > 0);
 	ASSERT(a_UpscaleX > 0);
@@ -166,8 +166,8 @@ template <typename TYPE> void LinearUpscale3DArray(
 	const int MAX_UPSCALE_Y = 128;
 	const int MAX_UPSCALE_Z = 128;
 
-	ASSERT(a_Src != NULL);
-	ASSERT(a_Dst != NULL);
+	ASSERT(a_Src != nullptr);
+	ASSERT(a_Dst != nullptr);
 	ASSERT(a_SrcSizeX > 0);
 	ASSERT(a_SrcSizeY > 0);
 	ASSERT(a_SrcSizeZ > 0);
diff --git a/src/LoggerListeners.cpp b/src/LoggerListeners.cpp
index 77e2aaf67..5c7097956 100644
--- a/src/LoggerListeners.cpp
+++ b/src/LoggerListeners.cpp
@@ -280,7 +280,7 @@ cFileListener::cFileListener(void)
 {
 	cFile::CreateFolder(FILE_IO_PREFIX + AString("logs"));
 	AString FileName;
-	FileName = Printf("%s%sLOG_%d.txt", FILE_IO_PREFIX, "logs/", (int)time(NULL));
+	FileName = Printf("%s%sLOG_%d.txt", FILE_IO_PREFIX, "logs/", (int)time(nullptr));
 	m_File.Open(FileName, cFile::fmAppend);
 }
 
diff --git a/src/Map.cpp b/src/Map.cpp
index c106ccd83..fbde00cf7 100644
--- a/src/Map.cpp
+++ b/src/Map.cpp
@@ -21,7 +21,7 @@ cMapDecorator::cMapDecorator(cMap * a_Map, eType a_Type, int a_X, int a_Z, int a
 	, m_PixelX(a_X)
 	, m_PixelZ(a_Z)
 	, m_Rot(a_Rot)
-	, m_Player(NULL)
+	, m_Player(nullptr)
 {
 }
 
@@ -43,9 +43,9 @@ cMapDecorator::cMapDecorator(cMap * a_Map, cPlayer * a_Player)
 
 void cMapDecorator::Update(void)
 {
-	if (m_Player != NULL)
+	if (m_Player != nullptr)
 	{
-		ASSERT(m_Map != NULL);
+		ASSERT(m_Map != nullptr);
 		unsigned int PixelWidth = m_Map->GetPixelWidth();
 
 		int InsideWidth  = (m_Map->GetWidth()  / 2) - 1;
@@ -221,7 +221,7 @@ bool cMap::UpdatePixel(unsigned int a_X, unsigned int a_Z)
 
 		virtual bool Item(cChunk * a_Chunk) override
 		{
-			if (a_Chunk == NULL)
+			if (a_Chunk == nullptr)
 			{
 				return false;
 			}
@@ -322,7 +322,7 @@ bool cMap::UpdatePixel(unsigned int a_X, unsigned int a_Z)
 		}
 	} CalculatePixelCb(this, RelX, RelZ);
 
-	ASSERT(m_World != NULL);
+	ASSERT(m_World != nullptr);
 	m_World->DoWithChunk(ChunkX, ChunkZ, CalculatePixelCb);
 
 	SetPixel(a_X, a_Z, CalculatePixelCb.GetPixelData());
@@ -349,7 +349,7 @@ void cMap::UpdateDecorators(void)
 void cMap::AddPlayer(cPlayer * a_Player, Int64 a_WorldAge)
 {
 	cClientHandle * Handle = a_Player->GetClientHandle();
-	if (Handle == NULL)
+	if (Handle == nullptr)
 	{
 		return;
 	}
@@ -454,10 +454,10 @@ void cMap::StreamNext(cMapClient & a_Client)
 
 void cMap::UpdateClient(cPlayer * a_Player)
 {
-	ASSERT(a_Player != NULL);
+	ASSERT(a_Player != nullptr);
 	cClientHandle * Handle = a_Player->GetClientHandle();
 
-	if (Handle == NULL)
+	if (Handle == nullptr)
 	{
 		return;
 	}
@@ -498,7 +498,7 @@ void cMap::EraseData(void)
 
 eDimension cMap::GetDimension(void) const
 {
-	ASSERT(m_World != NULL);
+	ASSERT(m_World != nullptr);
 	return m_World->GetDimension();
 }
 
diff --git a/src/MapManager.cpp b/src/MapManager.cpp
index e7df75118..2a3ab192b 100644
--- a/src/MapManager.cpp
+++ b/src/MapManager.cpp
@@ -15,7 +15,7 @@
 cMapManager::cMapManager(cWorld * a_World)
 	: m_World(a_World)
 {
-	ASSERT(m_World != NULL);
+	ASSERT(m_World != nullptr);
 }
 
 
@@ -27,7 +27,7 @@ bool cMapManager::DoWithMap(int a_ID, cMapCallback & a_Callback)
 	cCSLock Lock(m_CS);
 	cMap * Map = GetMapData(a_ID);
 
-	if (Map == NULL)
+	if (Map == nullptr)
 	{
 		return false;
 	}
@@ -68,7 +68,7 @@ cMap * cMapManager::GetMapData(unsigned int a_ID)
 	}
 	else
 	{
-		return NULL;
+		return nullptr;
 	}
 }
 
@@ -83,7 +83,7 @@ cMap * cMapManager::CreateMap(int a_CenterX, int a_CenterY, int a_Scale)
 	if (m_MapData.size() >= 65536)
 	{
 		LOGWARN("Could not craft map - Too many maps in use");
-		return NULL;
+		return nullptr;
 	}
 
 	cMap Map((unsigned)m_MapData.size(), a_CenterX, a_CenterY, m_World, a_Scale);
diff --git a/src/MapManager.h b/src/MapManager.h
index a40ec2630..2cc6a7bce 100644
--- a/src/MapManager.h
+++ b/src/MapManager.h
@@ -31,12 +31,12 @@ public:
 
 	cMapManager(cWorld * a_World);
 
-	/** Returns the map with the specified ID, NULL if out of range.
+	/** Returns the map with the specified ID, nullptr if out of range.
 	WARNING: The returned map object is not thread safe.
 	*/
 	cMap * GetMapData(unsigned int a_ID);
 
-	/** Creates a new map. Returns NULL on error */
+	/** Creates a new map. Returns nullptr on error */
 	cMap * CreateMap(int a_CenterX, int a_CenterY, int a_Scale = 3);
 
 	/** Calls the callback for the map with the specified ID.
diff --git a/src/MobSpawner.cpp b/src/MobSpawner.cpp
index ea3fe8c72..e461fae4c 100644
--- a/src/MobSpawner.cpp
+++ b/src/MobSpawner.cpp
@@ -301,7 +301,7 @@ bool cMobSpawner::CanSpawnHere(cChunk * a_Chunk, int a_RelX, int a_RelY, int a_R
 
 cMonster* cMobSpawner::TryToSpawnHere(cChunk * a_Chunk, int a_RelX, int a_RelY, int a_RelZ, EMCSBiome a_Biome, int& a_MaxPackSize)
 {
-	cMonster* toReturn = NULL;
+	cMonster* toReturn = nullptr;
 	if (m_NewPack)
 	{
 		m_MobType = ChooseMobType(a_Biome);
diff --git a/src/Mobs/AggressiveMonster.cpp b/src/Mobs/AggressiveMonster.cpp
index be2f71f7a..41ef26e2a 100644
--- a/src/Mobs/AggressiveMonster.cpp
+++ b/src/Mobs/AggressiveMonster.cpp
@@ -26,7 +26,7 @@ void cAggressiveMonster::InStateChasing(float a_Dt)
 {
 	super::InStateChasing(a_Dt);
 
-	if (m_Target != NULL)
+	if (m_Target != nullptr)
 	{
 		if (m_Target->IsPlayer())
 		{
@@ -74,7 +74,7 @@ void cAggressiveMonster::Tick(float a_Dt, cChunk & a_Chunk)
 		CheckEventSeePlayer();
 	}
 
-	if (m_Target == NULL)
+	if (m_Target == nullptr)
 		return;
 
 	cTracer LineOfSight(GetWorld());
@@ -95,7 +95,7 @@ void cAggressiveMonster::Attack(float a_Dt)
 {
 	m_AttackInterval += a_Dt * m_AttackRate;
 
-	if ((m_Target == NULL) || (m_AttackInterval < 3.0))
+	if ((m_Target == nullptr) || (m_AttackInterval < 3.0))
 	{
 		return;
 	}
diff --git a/src/Mobs/Blaze.cpp b/src/Mobs/Blaze.cpp
index b4104d530..16869c79d 100644
--- a/src/Mobs/Blaze.cpp
+++ b/src/Mobs/Blaze.cpp
@@ -19,7 +19,7 @@ cBlaze::cBlaze(void) :
 
 void cBlaze::GetDrops(cItems & a_Drops, cEntity * a_Killer)
 {
-	if ((a_Killer != NULL) && (a_Killer->IsPlayer() || a_Killer->IsA("cWolf")))
+	if ((a_Killer != nullptr) && (a_Killer->IsPlayer() || a_Killer->IsA("cWolf")))
 	{
 		int LootingLevel = a_Killer->GetEquippedWeapon().m_Enchantments.GetLevel(cEnchantments::enchLooting);
 		AddRandomDropItem(a_Drops, 0, 1 + LootingLevel, E_ITEM_BLAZE_ROD);
@@ -34,20 +34,20 @@ void cBlaze::Attack(float a_Dt)
 {
 	m_AttackInterval += a_Dt * m_AttackRate;
 
-	if (m_Target != NULL && m_AttackInterval > 3.0)
+	if (m_Target != nullptr && m_AttackInterval > 3.0)
 	{
 		// Setting this higher gives us more wiggle room for attackrate
 		Vector3d Speed = GetLookVector() * 20;
 		Speed.y = Speed.y + 1;
 		cFireChargeEntity * FireCharge = new cFireChargeEntity(this, GetPosX(), GetPosY() + 1, GetPosZ(), Speed);
-		if (FireCharge == NULL)
+		if (FireCharge == nullptr)
 		{
 			return;
 		}
 		if (!FireCharge->Initialize(*m_World))
 		{
 			delete FireCharge;
-			FireCharge = NULL;
+			FireCharge = nullptr;
 			return;
 		}
 		m_World->BroadcastSpawnEntity(*FireCharge);
diff --git a/src/Mobs/Blaze.h b/src/Mobs/Blaze.h
index f283b1070..e2a4ad9f1 100644
--- a/src/Mobs/Blaze.h
+++ b/src/Mobs/Blaze.h
@@ -17,6 +17,6 @@ public:
 
 	CLASS_PROTODEF(cBlaze)
 	
-	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = NULL) override;
+	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = nullptr) override;
 	virtual void Attack(float a_Dt) override;
 } ;
diff --git a/src/Mobs/CaveSpider.cpp b/src/Mobs/CaveSpider.cpp
index 118a6e93b..045b47e73 100644
--- a/src/Mobs/CaveSpider.cpp
+++ b/src/Mobs/CaveSpider.cpp
@@ -45,12 +45,12 @@ void cCaveSpider::Attack(float a_Dt)
 void cCaveSpider::GetDrops(cItems & a_Drops, cEntity * a_Killer)
 {
 	int LootingLevel = 0;
-	if (a_Killer != NULL)
+	if (a_Killer != nullptr)
 	{
 		LootingLevel = a_Killer->GetEquippedWeapon().m_Enchantments.GetLevel(cEnchantments::enchLooting);
 	}
 	AddRandomDropItem(a_Drops, 0, 2 + LootingLevel, E_ITEM_STRING);
-	if ((a_Killer != NULL) && (a_Killer->IsPlayer() || a_Killer->IsA("cWolf")))
+	if ((a_Killer != nullptr) && (a_Killer->IsPlayer() || a_Killer->IsA("cWolf")))
 	{
 		AddRandomUncommonDropItem(a_Drops, 33.0f, E_ITEM_SPIDER_EYE);
 	}
diff --git a/src/Mobs/CaveSpider.h b/src/Mobs/CaveSpider.h
index f9ed10e1b..494ba1360 100644
--- a/src/Mobs/CaveSpider.h
+++ b/src/Mobs/CaveSpider.h
@@ -18,7 +18,7 @@ public:
 
 	virtual void Tick(float a_Dt, cChunk & a_Chunk) override;
 	virtual void Attack(float a_Dt) override;
-	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = NULL) override;
+	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = nullptr) override;
 } ;
 
 
diff --git a/src/Mobs/Chicken.cpp b/src/Mobs/Chicken.cpp
index f7e44238f..634867cfa 100644
--- a/src/Mobs/Chicken.cpp
+++ b/src/Mobs/Chicken.cpp
@@ -49,7 +49,7 @@ void cChicken::Tick(float a_Dt, cChunk & a_Chunk)
 void cChicken::GetDrops(cItems & a_Drops, cEntity * a_Killer)
 {
 	int LootingLevel = 0;
-	if (a_Killer != NULL)
+	if (a_Killer != nullptr)
 	{
 		LootingLevel = a_Killer->GetEquippedWeapon().m_Enchantments.GetLevel(cEnchantments::enchLooting);
 	}
diff --git a/src/Mobs/Chicken.h b/src/Mobs/Chicken.h
index b1a50b61c..07b921884 100644
--- a/src/Mobs/Chicken.h
+++ b/src/Mobs/Chicken.h
@@ -16,7 +16,7 @@ public:
 
 	CLASS_PROTODEF(cChicken)
 
-	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = NULL) override;
+	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = nullptr) override;
 	virtual void Tick(float a_Dt, cChunk & a_Chunk) override;
 
 	virtual const cItem GetFollowedItem(void) const override { return cItem(E_ITEM_SEEDS); }
diff --git a/src/Mobs/Cow.cpp b/src/Mobs/Cow.cpp
index 9914df6b5..7dc6f3f37 100644
--- a/src/Mobs/Cow.cpp
+++ b/src/Mobs/Cow.cpp
@@ -22,7 +22,7 @@ cCow::cCow(void) :
 void cCow::GetDrops(cItems & a_Drops, cEntity * a_Killer)
 {
 	int LootingLevel = 0;
-	if (a_Killer != NULL)
+	if (a_Killer != nullptr)
 	{
 		LootingLevel = a_Killer->GetEquippedWeapon().m_Enchantments.GetLevel(cEnchantments::enchLooting);
 	}
diff --git a/src/Mobs/Cow.h b/src/Mobs/Cow.h
index 8814b7e09..ee1a4fafe 100644
--- a/src/Mobs/Cow.h
+++ b/src/Mobs/Cow.h
@@ -17,7 +17,7 @@ public:
 
 	CLASS_PROTODEF(cCow)
 
-	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = NULL) override;
+	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = nullptr) override;
 	virtual void OnRightClicked(cPlayer & a_Player) override;
 
 	virtual const cItem GetFollowedItem(void) const override { return cItem(E_ITEM_WHEAT); }
diff --git a/src/Mobs/Creeper.cpp b/src/Mobs/Creeper.cpp
index 02718edf8..a073224cf 100644
--- a/src/Mobs/Creeper.cpp
+++ b/src/Mobs/Creeper.cpp
@@ -61,13 +61,13 @@ void cCreeper::GetDrops(cItems & a_Drops, cEntity * a_Killer)
 	}
 
 	int LootingLevel = 0;
-	if (a_Killer != NULL)
+	if (a_Killer != nullptr)
 	{
 		LootingLevel = a_Killer->GetEquippedWeapon().m_Enchantments.GetLevel(cEnchantments::enchLooting);
 	}
 	AddRandomDropItem(a_Drops, 0, 2 + LootingLevel, E_ITEM_GUNPOWDER);
 
-	if ((a_Killer != NULL) && a_Killer->IsProjectile() && (((cProjectileEntity *)a_Killer)->GetCreatorUniqueID() >= 0))
+	if ((a_Killer != nullptr) && a_Killer->IsProjectile() && (((cProjectileEntity *)a_Killer)->GetCreatorUniqueID() >= 0))
 	{
 		class cProjectileCreatorCallback : public cEntityCallback
 		{
diff --git a/src/Mobs/Creeper.h b/src/Mobs/Creeper.h
index 747daca09..bf3272e22 100644
--- a/src/Mobs/Creeper.h
+++ b/src/Mobs/Creeper.h
@@ -17,7 +17,7 @@ public:
 
 	CLASS_PROTODEF(cCreeper)
 
-	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = NULL) override;
+	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = nullptr) override;
 	virtual bool DoTakeDamage(TakeDamageInfo & a_TDI) override;
 	virtual void Attack(float a_Dt) override;
 	virtual void Tick(float a_Dt, cChunk & a_Chunk) override;
diff --git a/src/Mobs/EnderDragon.h b/src/Mobs/EnderDragon.h
index 1d4cd657c..e4ca9dcf9 100644
--- a/src/Mobs/EnderDragon.h
+++ b/src/Mobs/EnderDragon.h
@@ -17,7 +17,7 @@ public:
 
 	CLASS_PROTODEF(cEnderDragon)
 	
-	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = NULL) override;
+	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = nullptr) override;
 } ;
 
 
diff --git a/src/Mobs/Enderman.cpp b/src/Mobs/Enderman.cpp
index 567714382..56ea10245 100644
--- a/src/Mobs/Enderman.cpp
+++ b/src/Mobs/Enderman.cpp
@@ -15,7 +15,7 @@ class cPlayerLookCheck :
 {
 public:
 	cPlayerLookCheck(Vector3d a_EndermanPos, int a_SightDistance) :
-		m_Player(NULL),
+		m_Player(nullptr),
 		m_EndermanPos(a_EndermanPos),
 		m_SightDistance(a_SightDistance)
 	{
@@ -92,7 +92,7 @@ cEnderman::cEnderman(void) :
 void cEnderman::GetDrops(cItems & a_Drops, cEntity * a_Killer)
 {
 	int LootingLevel = 0;
-	if (a_Killer != NULL)
+	if (a_Killer != nullptr)
 	{
 		LootingLevel = a_Killer->GetEquippedWeapon().m_Enchantments.GetLevel(cEnchantments::enchLooting);
 	}
@@ -104,7 +104,7 @@ void cEnderman::GetDrops(cItems & a_Drops, cEntity * a_Killer)
 
 void cEnderman::CheckEventSeePlayer()
 {
-	if (m_Target != NULL)
+	if (m_Target != nullptr)
 	{
 		return;
 	}
@@ -115,7 +115,7 @@ void cEnderman::CheckEventSeePlayer()
 		return;
 	}
 	
-	ASSERT(Callback.GetPlayer() != NULL);
+	ASSERT(Callback.GetPlayer() != nullptr);
 
 	if (!CheckLight())
 	{
@@ -196,7 +196,7 @@ void cEnderman::Tick(float a_Dt, cChunk & a_Chunk)
 	if (IsSwimming())
 	{
 		EventLosePlayer();
-		TakeDamage(dtDrowning, NULL, 1, 0);
+		TakeDamage(dtDrowning, nullptr, 1, 0);
 		// TODO teleport to a safe location
 	}
 
diff --git a/src/Mobs/Enderman.h b/src/Mobs/Enderman.h
index 947c32b96..28bbceb84 100644
--- a/src/Mobs/Enderman.h
+++ b/src/Mobs/Enderman.h
@@ -17,7 +17,7 @@ public:
 
 	CLASS_PROTODEF(cEnderman)
 
-	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = NULL) override;
+	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = nullptr) override;
 	virtual void CheckEventSeePlayer(void) override;
 	virtual void CheckEventLostPlayer(void) override;
 	virtual void EventLosePlayer(void) override;
diff --git a/src/Mobs/Ghast.cpp b/src/Mobs/Ghast.cpp
index 6aac14779..c65c0d29a 100644
--- a/src/Mobs/Ghast.cpp
+++ b/src/Mobs/Ghast.cpp
@@ -20,7 +20,7 @@ cGhast::cGhast(void) :
 void cGhast::GetDrops(cItems & a_Drops, cEntity * a_Killer)
 {
 	int LootingLevel = 0;
-	if (a_Killer != NULL)
+	if (a_Killer != nullptr)
 	{
 		LootingLevel = a_Killer->GetEquippedWeapon().m_Enchantments.GetLevel(cEnchantments::enchLooting);
 	}
@@ -36,20 +36,20 @@ void cGhast::Attack(float a_Dt)
 {
 	m_AttackInterval += a_Dt * m_AttackRate;
 	
-	if (m_Target != NULL && m_AttackInterval > 3.0)
+	if (m_Target != nullptr && m_AttackInterval > 3.0)
 	{
 		// Setting this higher gives us more wiggle room for attackrate
 		Vector3d Speed = GetLookVector() * 20;
 		Speed.y = Speed.y + 1;
 		cGhastFireballEntity * GhastBall = new cGhastFireballEntity(this, GetPosX(), GetPosY() + 1, GetPosZ(), Speed);
-		if (GhastBall == NULL)
+		if (GhastBall == nullptr)
 		{
 			return;
 		}
 		if (!GhastBall->Initialize(*m_World))
 		{
 			delete GhastBall;
-			GhastBall = NULL;
+			GhastBall = nullptr;
 			return;
 		}
 		m_World->BroadcastSpawnEntity(*GhastBall);
diff --git a/src/Mobs/Ghast.h b/src/Mobs/Ghast.h
index 1d4e6b94a..a28940a01 100644
--- a/src/Mobs/Ghast.h
+++ b/src/Mobs/Ghast.h
@@ -17,7 +17,7 @@ public:
 
 	CLASS_PROTODEF(cGhast)
 
-	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = NULL) override;
+	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = nullptr) override;
 	virtual void Attack(float a_Dt) override;
 
 	bool IsCharging(void) const {return false; }
diff --git a/src/Mobs/Giant.h b/src/Mobs/Giant.h
index 7c04c9b4f..8d3060940 100644
--- a/src/Mobs/Giant.h
+++ b/src/Mobs/Giant.h
@@ -17,7 +17,7 @@ public:
 
 	CLASS_PROTODEF(cGiant)
 	
-	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = NULL) override;
+	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = nullptr) override;
 } ;
 
 
diff --git a/src/Mobs/Horse.cpp b/src/Mobs/Horse.cpp
index 67a09d4ab..d92f0d023 100644
--- a/src/Mobs/Horse.cpp
+++ b/src/Mobs/Horse.cpp
@@ -49,7 +49,7 @@ void cHorse::Tick(float a_Dt, cChunk & a_Chunk)
 		}
 	}
 
-	if ((m_Attachee != NULL) && (!m_bIsTame))
+	if ((m_Attachee != nullptr) && (!m_bIsTame))
 	{
 		if (m_TameAttemptTimes < m_TimesToTame)
 		{
@@ -113,7 +113,7 @@ void cHorse::OnRightClicked(cPlayer & a_Player)
 	}
 	else
 	{
-		if (m_Attachee != NULL)
+		if (m_Attachee != nullptr)
 		{
 			if (m_Attachee->GetUniqueID() == a_Player.GetUniqueID())
 			{
@@ -141,7 +141,7 @@ void cHorse::OnRightClicked(cPlayer & a_Player)
 void cHorse::GetDrops(cItems & a_Drops, cEntity * a_Killer)
 {
 	int LootingLevel = 0;
-	if (a_Killer != NULL)
+	if (a_Killer != nullptr)
 	{
 		LootingLevel = a_Killer->GetEquippedWeapon().m_Enchantments.GetLevel(cEnchantments::enchLooting);
 	}
diff --git a/src/Mobs/Horse.h b/src/Mobs/Horse.h
index 47189b3b0..4c644e512 100644
--- a/src/Mobs/Horse.h
+++ b/src/Mobs/Horse.h
@@ -17,7 +17,7 @@ public:
 
 	CLASS_PROTODEF(cHorse)
 	
-	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = NULL) override;
+	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = nullptr) override;
 	virtual void Tick(float a_Dt, cChunk & a_Chunk) override;
 	virtual void OnRightClicked(cPlayer & a_Player) override;
 
diff --git a/src/Mobs/IronGolem.h b/src/Mobs/IronGolem.h
index c5341ed76..721ca2701 100644
--- a/src/Mobs/IronGolem.h
+++ b/src/Mobs/IronGolem.h
@@ -17,7 +17,7 @@ public:
 
 	CLASS_PROTODEF(cIronGolem)
 	
-	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = NULL) override;
+	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = nullptr) override;
 
 	// Iron golems do not drown nor float
 	virtual void HandleAir(void) override {}
diff --git a/src/Mobs/MagmaCube.h b/src/Mobs/MagmaCube.h
index bfe63fa2e..d66ea423a 100644
--- a/src/Mobs/MagmaCube.h
+++ b/src/Mobs/MagmaCube.h
@@ -17,7 +17,7 @@ public:
 
 	CLASS_PROTODEF(cMagmaCube)
 
-	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = NULL) override;
+	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = nullptr) override;
 	int GetSize(void) const { return m_Size; }
 	
 protected:
diff --git a/src/Mobs/Monster.cpp b/src/Mobs/Monster.cpp
index 73dbcb3c3..23b4d9f45 100644
--- a/src/Mobs/Monster.cpp
+++ b/src/Mobs/Monster.cpp
@@ -79,7 +79,7 @@ cMonster::cMonster(const AString & a_ConfigName, eMonsterType a_MobType, const A
 	: super(etMonster, a_Width, a_Height)
 	, m_EMState(IDLE)
 	, m_EMPersonality(AGGRESSIVE)
-	, m_Target(NULL)
+	, m_Target(nullptr)
 	, m_bMovingToDestination(false)
 	, m_LastGroundHeight(POSY_TOINT)
 	, m_IdleInterval(0)
@@ -274,8 +274,8 @@ void cMonster::Tick(float a_Dt, cChunk & a_Chunk)
 		return;
 	}
 
-	if ((m_Target != NULL) && m_Target->IsDestroyed())
-		m_Target = NULL;
+	if ((m_Target != nullptr) && m_Target->IsDestroyed())
+		m_Target = nullptr;
 
 	// Burning in daylight
 	HandleDaylightBurning(a_Chunk);
@@ -379,7 +379,7 @@ void cMonster::Tick(float a_Dt, cChunk & a_Chunk)
 void cMonster::SetPitchAndYawFromDestination()
 {
 	Vector3d FinalDestination = m_FinalDestination;
-	if (m_Target != NULL)
+	if (m_Target != nullptr)
 	{
 		if (m_Target->IsPlayer())
 		{
@@ -423,7 +423,7 @@ void cMonster::HandleFalling()
 
 		if (Damage > 0)
 		{
-			TakeDamage(dtFalling, NULL, Damage, Damage, 0);
+			TakeDamage(dtFalling, nullptr, Damage, Damage, 0);
 
 			// Fall particles
 			GetWorld()->BroadcastSoundParticleEffect(2006, POSX_TOINT, POSY_TOINT - 1, POSZ_TOINT, Damage /* Used as particle effect speed modifier */);
@@ -479,7 +479,7 @@ bool cMonster::DoTakeDamage(TakeDamageInfo & a_TDI)
 		m_World->BroadcastSoundEffect(m_SoundHurt, GetPosX(), GetPosY(), GetPosZ(), 1.0f, 0.8f);
 	}
 
-	if (a_TDI.Attacker != NULL)
+	if (a_TDI.Attacker != nullptr)
 	{
 		m_Target = a_TDI.Attacker;
 	}
@@ -556,7 +556,7 @@ void cMonster::KilledBy(TakeDamageInfo & a_TDI)
 			break;
 		}
 	}
-	if ((a_TDI.Attacker != NULL) && (!IsBaby()))
+	if ((a_TDI.Attacker != nullptr) && (!IsBaby()))
 	{
 		m_World->SpawnExperienceOrb(GetPosX(), GetPosY(), GetPosZ(), Reward);
 	}
@@ -593,7 +593,7 @@ void cMonster::CheckEventSeePlayer(void)
 	// TODO: Rewrite this to use cWorld's DoWithPlayers()
 	cPlayer * Closest = m_World->FindClosestPlayer(GetPosition(), (float)m_SightDistance, false);
 
-	if (Closest != NULL)
+	if (Closest != nullptr)
 	{
 		EventSeePlayer(Closest);
 	}
@@ -605,7 +605,7 @@ void cMonster::CheckEventSeePlayer(void)
 
 void cMonster::CheckEventLostPlayer(void)
 {
-	if (m_Target != NULL)
+	if (m_Target != nullptr)
 	{
 		if ((m_Target->GetPosition() - GetPosition()).Length() > m_SightDistance)
 		{
@@ -635,7 +635,7 @@ void cMonster::EventSeePlayer(cEntity * a_SeenPlayer)
 
 void cMonster::EventLosePlayer(void)
 {
-	m_Target = NULL;
+	m_Target = nullptr;
 	m_EMState = IDLE;
 }
 
@@ -697,7 +697,7 @@ void cMonster::InStateEscaping(float a_Dt)
 {
 	UNUSED(a_Dt);
 	
-	if (m_Target != NULL)
+	if (m_Target != nullptr)
 	{
 		Vector3d newloc = GetPosition();
 		newloc.x = (m_Target->GetPosition().x < newloc.x)? (newloc.x + m_SightDistance): (newloc.x - m_SightDistance);
@@ -724,7 +724,7 @@ void cMonster::SetCustomName(const AString & a_CustomName)
 		m_CustomName = a_CustomName.substr(0, 64);
 	}
 
-	if (m_World != NULL)
+	if (m_World != nullptr)
 	{
 		m_World->BroadcastEntityMetadata(*this);
 	}
@@ -737,7 +737,7 @@ void cMonster::SetCustomName(const AString & a_CustomName)
 void cMonster::SetCustomNameAlwaysVisible(bool a_CustomNameAlwaysVisible)
 {
 	m_CustomNameAlwaysVisible = a_CustomNameAlwaysVisible;
-	if (m_World != NULL)
+	if (m_World != nullptr)
 	{
 		m_World->BroadcastEntityMetadata(*this);
 	}
@@ -893,7 +893,7 @@ int cMonster::GetSpawnDelay(cMonster::eFamily a_MobFamily)
 cMonster * cMonster::NewMonsterFromType(eMonsterType a_MobType)
 {
 	cFastRandom Random;
-	cMonster * toReturn = NULL;
+	cMonster * toReturn = nullptr;
 
 	// Create the mob entity
 	switch (a_MobType)
diff --git a/src/Mobs/Mooshroom.cpp b/src/Mobs/Mooshroom.cpp
index 99958720f..ec533cfca 100644
--- a/src/Mobs/Mooshroom.cpp
+++ b/src/Mobs/Mooshroom.cpp
@@ -25,7 +25,7 @@ cMooshroom::cMooshroom(void) :
 void cMooshroom::GetDrops(cItems & a_Drops, cEntity * a_Killer)
 {
 	int LootingLevel = 0;
-	if (a_Killer != NULL)
+	if (a_Killer != nullptr)
 	{
 		LootingLevel = a_Killer->GetEquippedWeapon().m_Enchantments.GetLevel(cEnchantments::enchLooting);
 	}
diff --git a/src/Mobs/Mooshroom.h b/src/Mobs/Mooshroom.h
index fb002c2bf..754725c92 100644
--- a/src/Mobs/Mooshroom.h
+++ b/src/Mobs/Mooshroom.h
@@ -17,7 +17,7 @@ public:
 
 	CLASS_PROTODEF(cMooshroom)
 
-	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = NULL) override;
+	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = nullptr) override;
 	virtual void OnRightClicked(cPlayer & a_Player) override;
 
 	virtual const cItem GetFollowedItem(void) const override { return cItem(E_ITEM_WHEAT); }
diff --git a/src/Mobs/PassiveAggressiveMonster.cpp b/src/Mobs/PassiveAggressiveMonster.cpp
index e0cc2fd21..cb8650cb9 100644
--- a/src/Mobs/PassiveAggressiveMonster.cpp
+++ b/src/Mobs/PassiveAggressiveMonster.cpp
@@ -26,7 +26,7 @@ bool cPassiveAggressiveMonster::DoTakeDamage(TakeDamageInfo & a_TDI)
 		return false;
 	}
 	
-	if ((m_Target != NULL) && (m_Target->IsPlayer()))
+	if ((m_Target != nullptr) && (m_Target->IsPlayer()))
 	{
 		if (!((cPlayer *)m_Target)->IsGameModeCreative())
 		{
diff --git a/src/Mobs/PassiveMonster.cpp b/src/Mobs/PassiveMonster.cpp
index be3043e3d..1048616d0 100644
--- a/src/Mobs/PassiveMonster.cpp
+++ b/src/Mobs/PassiveMonster.cpp
@@ -24,7 +24,7 @@ bool cPassiveMonster::DoTakeDamage(TakeDamageInfo & a_TDI)
 	{
 		return false;
 	}
-	if ((a_TDI.Attacker != this) && (a_TDI.Attacker != NULL))
+	if ((a_TDI.Attacker != this) && (a_TDI.Attacker != nullptr))
 	{
 		m_EMState = ESCAPING;
 	}
@@ -49,7 +49,7 @@ void cPassiveMonster::Tick(float a_Dt, cChunk & a_Chunk)
 		return;
 	}
 	cPlayer * a_Closest_Player = m_World->FindClosestPlayer(GetPosition(), (float)m_SightDistance);
-	if (a_Closest_Player != NULL)
+	if (a_Closest_Player != nullptr)
 	{
 		if (a_Closest_Player->GetEquippedItem().IsEqual(FollowedItem))
 		{
diff --git a/src/Mobs/Pig.cpp b/src/Mobs/Pig.cpp
index 1f77cf613..55a4412ca 100644
--- a/src/Mobs/Pig.cpp
+++ b/src/Mobs/Pig.cpp
@@ -22,7 +22,7 @@ cPig::cPig(void) :
 void cPig::GetDrops(cItems & a_Drops, cEntity * a_Killer)
 {
 	int LootingLevel = 0;
-	if (a_Killer != NULL)
+	if (a_Killer != nullptr)
 	{
 		LootingLevel = a_Killer->GetEquippedWeapon().m_Enchantments.GetLevel(cEnchantments::enchLooting);
 	}
@@ -41,7 +41,7 @@ void cPig::OnRightClicked(cPlayer & a_Player)
 {
 	if (m_bIsSaddled)
 	{
-		if (m_Attachee != NULL)
+		if (m_Attachee != nullptr)
 		{
 			if (m_Attachee->GetUniqueID() == a_Player.GetUniqueID())
 			{
@@ -85,7 +85,7 @@ void cPig::Tick(float a_Dt, cChunk & a_Chunk)
 	super::Tick(a_Dt, a_Chunk);
 
 	// If the attachee player is holding a carrot-on-stick, let them drive this pig:
-	if (m_bIsSaddled && (m_Attachee != NULL))
+	if (m_bIsSaddled && (m_Attachee != nullptr))
 	{
 		if (m_Attachee->IsPlayer() && (m_Attachee->GetEquippedWeapon().m_ItemType == E_ITEM_CARROT_ON_STICK))
 		{
diff --git a/src/Mobs/Pig.h b/src/Mobs/Pig.h
index 534a0ca6f..953850b3a 100644
--- a/src/Mobs/Pig.h
+++ b/src/Mobs/Pig.h
@@ -17,7 +17,7 @@ public:
 
 	CLASS_PROTODEF(cPig)
 
-	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = NULL) override;
+	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = nullptr) override;
 	virtual void OnRightClicked(cPlayer & a_Player) override;
 	virtual void Tick(float a_Dt, cChunk & a_Chunk) override;
 
diff --git a/src/Mobs/Sheep.cpp b/src/Mobs/Sheep.cpp
index cbb33cb90..c46404391 100644
--- a/src/Mobs/Sheep.cpp
+++ b/src/Mobs/Sheep.cpp
@@ -41,7 +41,7 @@ void cSheep::GetDrops(cItems & a_Drops, cEntity * a_Killer)
 	}
 
 	int LootingLevel = 0;
-	if (a_Killer != NULL)
+	if (a_Killer != nullptr)
 	{
 		LootingLevel = a_Killer->GetEquippedWeapon().m_Enchantments.GetLevel(cEnchantments::enchLooting);
 	}
diff --git a/src/Mobs/Sheep.h b/src/Mobs/Sheep.h
index 28e1c7254..16d5fddd3 100644
--- a/src/Mobs/Sheep.h
+++ b/src/Mobs/Sheep.h
@@ -22,7 +22,7 @@ public:
 
 	CLASS_PROTODEF(cSheep)
 
-	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = NULL) override;
+	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = nullptr) override;
 	virtual void OnRightClicked(cPlayer & a_Player) override;
 	virtual void Tick(float a_Dt, cChunk & a_Chunk) override;
 
diff --git a/src/Mobs/Skeleton.cpp b/src/Mobs/Skeleton.cpp
index cd707f4bb..f17bc307c 100644
--- a/src/Mobs/Skeleton.cpp
+++ b/src/Mobs/Skeleton.cpp
@@ -23,7 +23,7 @@ cSkeleton::cSkeleton(bool IsWither) :
 void cSkeleton::GetDrops(cItems & a_Drops, cEntity * a_Killer)
 {
 	int LootingLevel = 0;
-	if (a_Killer != NULL)
+	if (a_Killer != nullptr)
 	{
 		LootingLevel = a_Killer->GetEquippedWeapon().m_Enchantments.GetLevel(cEnchantments::enchLooting);
 	}
@@ -71,20 +71,20 @@ void cSkeleton::Attack(float a_Dt)
 {
 	m_AttackInterval += a_Dt * m_AttackRate;
 
-	if (m_Target != NULL && m_AttackInterval > 3.0)
+	if (m_Target != nullptr && m_AttackInterval > 3.0)
 	{
 		// Setting this higher gives us more wiggle room for attackrate
 		Vector3d Speed = GetLookVector() * 20;
 		Speed.y = Speed.y + 1;
 		cArrowEntity * Arrow = new cArrowEntity(this, GetPosX(), GetPosY() + 1, GetPosZ(), Speed);
-		if (Arrow == NULL)
+		if (Arrow == nullptr)
 		{
 			return;
 		}
 		if (!Arrow->Initialize(*m_World))
 		{
 			delete Arrow;
-			Arrow = NULL;
+			Arrow = nullptr;
 			return;
 		}
 		m_World->BroadcastSpawnEntity(*Arrow);
diff --git a/src/Mobs/Skeleton.h b/src/Mobs/Skeleton.h
index 577588b32..cd1c6c3f0 100644
--- a/src/Mobs/Skeleton.h
+++ b/src/Mobs/Skeleton.h
@@ -17,7 +17,7 @@ public:
 
 	CLASS_PROTODEF(cSkeleton)
 
-	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = NULL) override;
+	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = nullptr) override;
 	virtual void MoveToPosition(const Vector3d & a_Position) override;
 	virtual void Attack(float a_Dt) override;
 	virtual void SpawnOn(cClientHandle & a_ClientHandle) override;
diff --git a/src/Mobs/Slime.cpp b/src/Mobs/Slime.cpp
index b709ec664..1c68c5189 100644
--- a/src/Mobs/Slime.cpp
+++ b/src/Mobs/Slime.cpp
@@ -30,7 +30,7 @@ cSlime::cSlime(int a_Size) :
 void cSlime::GetDrops(cItems & a_Drops, cEntity * a_Killer)
 {
 	int LootingLevel = 0;
-	if (a_Killer != NULL)
+	if (a_Killer != nullptr)
 	{
 		LootingLevel = a_Killer->GetEquippedWeapon().m_Enchantments.GetLevel(cEnchantments::enchLooting);
 	}
diff --git a/src/Mobs/Slime.h b/src/Mobs/Slime.h
index f0b800f94..a177a279c 100644
--- a/src/Mobs/Slime.h
+++ b/src/Mobs/Slime.h
@@ -19,7 +19,7 @@ public:
 	CLASS_PROTODEF(cSlime)
 
 	// cAggressiveMonster overrides:
-	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = NULL) override;
+	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = nullptr) override;
 	virtual void Attack(float a_Dt) override;
 	virtual void KilledBy(TakeDamageInfo & a_TDI) override;
 
diff --git a/src/Mobs/SnowGolem.h b/src/Mobs/SnowGolem.h
index aba89e52d..f036b1867 100644
--- a/src/Mobs/SnowGolem.h
+++ b/src/Mobs/SnowGolem.h
@@ -18,7 +18,7 @@ public:
 	CLASS_PROTODEF(cSnowGolem)
 	
 	virtual void Tick(float a_Dt, cChunk & a_Chunk) override;
-	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = NULL) override;
+	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = nullptr) override;
 } ;
 
 
diff --git a/src/Mobs/Spider.cpp b/src/Mobs/Spider.cpp
index 8b978ff6b..deb263c41 100644
--- a/src/Mobs/Spider.cpp
+++ b/src/Mobs/Spider.cpp
@@ -19,12 +19,12 @@ cSpider::cSpider(void) :
 void cSpider::GetDrops(cItems & a_Drops, cEntity * a_Killer)
 {
 	int LootingLevel = 0;
-	if (a_Killer != NULL)
+	if (a_Killer != nullptr)
 	{
 		LootingLevel = a_Killer->GetEquippedWeapon().m_Enchantments.GetLevel(cEnchantments::enchLooting);
 	}
 	AddRandomDropItem(a_Drops, 0, 2 + LootingLevel, E_ITEM_STRING);
-	if ((a_Killer != NULL) && (a_Killer->IsPlayer() || a_Killer->IsA("cWolf")))
+	if ((a_Killer != nullptr) && (a_Killer->IsPlayer() || a_Killer->IsA("cWolf")))
 	{
 		AddRandomUncommonDropItem(a_Drops, 33.0f, E_ITEM_SPIDER_EYE);
 	}
diff --git a/src/Mobs/Spider.h b/src/Mobs/Spider.h
index 813d2e266..24134c00f 100644
--- a/src/Mobs/Spider.h
+++ b/src/Mobs/Spider.h
@@ -17,7 +17,7 @@ public:
 
 	CLASS_PROTODEF(cSpider)
 
-	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = NULL) override;
+	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = nullptr) override;
 } ;
 
 
diff --git a/src/Mobs/Squid.cpp b/src/Mobs/Squid.cpp
index bd0e141a0..59ee963ae 100644
--- a/src/Mobs/Squid.cpp
+++ b/src/Mobs/Squid.cpp
@@ -22,7 +22,7 @@ void cSquid::GetDrops(cItems & a_Drops, cEntity * a_Killer)
 {
 	// Drops 0-3 Ink Sacs
 	int LootingLevel = 0;
-	if (a_Killer != NULL)
+	if (a_Killer != nullptr)
 	{
 		LootingLevel = a_Killer->GetEquippedWeapon().m_Enchantments.GetLevel(cEnchantments::enchLooting);
 	}
diff --git a/src/Mobs/Squid.h b/src/Mobs/Squid.h
index b57340427..a46d738c6 100644
--- a/src/Mobs/Squid.h
+++ b/src/Mobs/Squid.h
@@ -19,7 +19,7 @@ public:
 
 	CLASS_PROTODEF(cSquid)
 	
-	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = NULL) override;
+	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = nullptr) override;
 
 	// Squids do not drown (or float)
 	virtual void HandleAir(void) override {}
diff --git a/src/Mobs/Villager.cpp b/src/Mobs/Villager.cpp
index 0efd5501e..5c9999a59 100644
--- a/src/Mobs/Villager.cpp
+++ b/src/Mobs/Villager.cpp
@@ -30,7 +30,7 @@ bool cVillager::DoTakeDamage(TakeDamageInfo & a_TDI)
 		return false;
 	}
 
-	if ((a_TDI.Attacker != NULL) && a_TDI.Attacker->IsPlayer())
+	if ((a_TDI.Attacker != nullptr) && a_TDI.Attacker->IsPlayer())
 	{
 		if (m_World->GetTickRandomNumber(5) == 3)
 		{
diff --git a/src/Mobs/Witch.cpp b/src/Mobs/Witch.cpp
index 6956f7b7a..747a11f97 100644
--- a/src/Mobs/Witch.cpp
+++ b/src/Mobs/Witch.cpp
@@ -19,7 +19,7 @@ cWitch::cWitch(void) :
 void cWitch::GetDrops(cItems & a_Drops, cEntity * a_Killer)
 {
 	int LootingLevel = 0;
-	if (a_Killer != NULL)
+	if (a_Killer != nullptr)
 	{
 		LootingLevel = a_Killer->GetEquippedWeapon().m_Enchantments.GetLevel(cEnchantments::enchLooting);
 	}
diff --git a/src/Mobs/Witch.h b/src/Mobs/Witch.h
index bd059f61d..03691fef1 100644
--- a/src/Mobs/Witch.h
+++ b/src/Mobs/Witch.h
@@ -18,7 +18,7 @@ public:
 
 	CLASS_PROTODEF(cWitch)
 
-	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = NULL) override;
+	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = nullptr) override;
 
 	bool IsAngry(void) const {return ((m_EMState == ATTACKING) || (m_EMState == CHASING)); }
 } ;
diff --git a/src/Mobs/Wither.h b/src/Mobs/Wither.h
index 2403823ed..a20fed3d3 100644
--- a/src/Mobs/Wither.h
+++ b/src/Mobs/Wither.h
@@ -26,7 +26,7 @@ public:
 	
 	// cEntity overrides
 	virtual bool Initialize(cWorld & a_World) override;
-	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = NULL) override;
+	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = nullptr) override;
 	virtual bool DoTakeDamage(TakeDamageInfo & a_TDI) override;
 	virtual void Tick(float a_Dt, cChunk & a_Chunk) override;
 	virtual void KilledBy(TakeDamageInfo & a_TDI) override;
diff --git a/src/Mobs/Wolf.cpp b/src/Mobs/Wolf.cpp
index 4fe1ff1d6..4711d5a7a 100644
--- a/src/Mobs/Wolf.cpp
+++ b/src/Mobs/Wolf.cpp
@@ -47,7 +47,7 @@ void cWolf::Attack(float a_Dt)
 {
 	UNUSED(a_Dt);
 
-	if ((m_Target != NULL) && (m_Target->IsPlayer()))
+	if ((m_Target != nullptr) && (m_Target->IsPlayer()))
 	{
 		if (((cPlayer *)m_Target)->GetName() != m_OwnerName)
 		{
@@ -157,7 +157,7 @@ void cWolf::Tick(float a_Dt, cChunk & a_Chunk)
 	}
 
 	cPlayer * a_Closest_Player = m_World->FindClosestPlayer(GetPosition(), (float)m_SightDistance);
-	if (a_Closest_Player != NULL)
+	if (a_Closest_Player != nullptr)
 	{
 		switch (a_Closest_Player->GetEquippedItem().m_ItemType)
 		{
diff --git a/src/Mobs/Zombie.cpp b/src/Mobs/Zombie.cpp
index 30225c32d..63042e252 100644
--- a/src/Mobs/Zombie.cpp
+++ b/src/Mobs/Zombie.cpp
@@ -24,7 +24,7 @@ cZombie::cZombie(bool a_IsVillagerZombie) :
 void cZombie::GetDrops(cItems & a_Drops, cEntity * a_Killer)
 {
 	int LootingLevel = 0;
-	if (a_Killer != NULL)
+	if (a_Killer != nullptr)
 	{
 		LootingLevel = a_Killer->GetEquippedWeapon().m_Enchantments.GetLevel(cEnchantments::enchLooting);
 	}
diff --git a/src/Mobs/Zombie.h b/src/Mobs/Zombie.h
index 118b6e6e7..809c2a6fe 100644
--- a/src/Mobs/Zombie.h
+++ b/src/Mobs/Zombie.h
@@ -16,7 +16,7 @@ public:
 
 	CLASS_PROTODEF(cZombie)
 	
-	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = NULL) override;
+	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = nullptr) override;
 	virtual void MoveToPosition(const Vector3d & a_Position) override;
 
 	virtual bool IsUndead(void) override { return true; }
diff --git a/src/Mobs/ZombiePigman.cpp b/src/Mobs/ZombiePigman.cpp
index 05350f877..8b415b0af 100644
--- a/src/Mobs/ZombiePigman.cpp
+++ b/src/Mobs/ZombiePigman.cpp
@@ -19,7 +19,7 @@ cZombiePigman::cZombiePigman(void) :
 void cZombiePigman::GetDrops(cItems & a_Drops, cEntity * a_Killer)
 {
 	int LootingLevel = 0;
-	if (a_Killer != NULL)
+	if (a_Killer != nullptr)
 	{
 		LootingLevel = a_Killer->GetEquippedWeapon().m_Enchantments.GetLevel(cEnchantments::enchLooting);
 	}
@@ -41,7 +41,7 @@ void cZombiePigman::KilledBy(TakeDamageInfo & a_TDI)
 {
 	super::KilledBy(a_TDI);
 
-	if ((a_TDI.Attacker != NULL) && (a_TDI.Attacker->IsPlayer()))
+	if ((a_TDI.Attacker != nullptr) && (a_TDI.Attacker->IsPlayer()))
 	{
 		// TODO: Anger all nearby zombie pigmen
 		// TODO: In vanilla, if one player angers ZPs, do they attack any nearby player, or only that one attacker?
diff --git a/src/Mobs/ZombiePigman.h b/src/Mobs/ZombiePigman.h
index bae0115eb..d8b886ca4 100644
--- a/src/Mobs/ZombiePigman.h
+++ b/src/Mobs/ZombiePigman.h
@@ -16,7 +16,7 @@ public:
 
 	CLASS_PROTODEF(cZombiePigman)
 
-	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = NULL) override;
+	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = nullptr) override;
 	virtual void KilledBy(TakeDamageInfo & a_TDI) override;
 	
 	virtual bool IsUndead(void) override { return true; }
diff --git a/src/MonsterConfig.cpp b/src/MonsterConfig.cpp
index f5e078213..a15e413ba 100644
--- a/src/MonsterConfig.cpp
+++ b/src/MonsterConfig.cpp
@@ -47,7 +47,7 @@ cMonsterConfig::cMonsterConfig(void)
 cMonsterConfig::~cMonsterConfig()
 {
 	delete m_pState;
-	m_pState = NULL;
+	m_pState = nullptr;
 }
 
 
diff --git a/src/Noise.cpp b/src/Noise.cpp
index 71e801f30..8fcfe2920 100644
--- a/src/Noise.cpp
+++ b/src/Noise.cpp
@@ -845,7 +845,7 @@ void cPerlinNoise::Generate2D(
 		return;
 	}
 	
-	bool ShouldFreeWorkspace = (a_Workspace == NULL);
+	bool ShouldFreeWorkspace = (a_Workspace == nullptr);
 	int ArrayCount = a_SizeX * a_SizeY;
 	if (ShouldFreeWorkspace)
 	{
@@ -886,7 +886,7 @@ void cPerlinNoise::Generate2D(
 	if (ShouldFreeWorkspace)
 	{
 		delete[] a_Workspace;
-		a_Workspace = NULL;
+		a_Workspace = nullptr;
 	}
 }
 
@@ -910,7 +910,7 @@ void cPerlinNoise::Generate3D(
 		return;
 	}
 	
-	bool ShouldFreeWorkspace = (a_Workspace == NULL);
+	bool ShouldFreeWorkspace = (a_Workspace == nullptr);
 	int ArrayCount = a_SizeX * a_SizeY * a_SizeZ;
 	if (ShouldFreeWorkspace)
 	{
@@ -953,7 +953,7 @@ void cPerlinNoise::Generate3D(
 	if (ShouldFreeWorkspace)
 	{
 		delete[] a_Workspace;
-		a_Workspace = NULL;
+		a_Workspace = nullptr;
 	}
 }
 
@@ -1015,7 +1015,7 @@ void cRidgedMultiNoise::Generate2D(
 		return;
 	}
 	
-	bool ShouldFreeWorkspace = (a_Workspace == NULL);
+	bool ShouldFreeWorkspace = (a_Workspace == nullptr);
 	int ArrayCount = a_SizeX * a_SizeY;
 	if (ShouldFreeWorkspace)
 	{
@@ -1056,7 +1056,7 @@ void cRidgedMultiNoise::Generate2D(
 	if (ShouldFreeWorkspace)
 	{
 		delete[] a_Workspace;
-		a_Workspace = NULL;
+		a_Workspace = nullptr;
 	}
 }
 
@@ -1080,7 +1080,7 @@ void cRidgedMultiNoise::Generate3D(
 		return;
 	}
 	
-	bool ShouldFreeWorkspace = (a_Workspace == NULL);
+	bool ShouldFreeWorkspace = (a_Workspace == nullptr);
 	int ArrayCount = a_SizeX * a_SizeY * a_SizeZ;
 	if (ShouldFreeWorkspace)
 	{
@@ -1123,7 +1123,7 @@ void cRidgedMultiNoise::Generate3D(
 	if (ShouldFreeWorkspace)
 	{
 		delete[] a_Workspace;
-		a_Workspace = NULL;
+		a_Workspace = nullptr;
 	}
 }
 
diff --git a/src/Noise.h b/src/Noise.h
index 4cf8d4ad8..b7a90d5b7 100644
--- a/src/Noise.h
+++ b/src/Noise.h
@@ -155,7 +155,7 @@ public:
 		NOISE_DATATYPE * a_Array,                        ///< Array to generate into
 		int a_SizeX,                                     ///< Count of the array
 		NOISE_DATATYPE a_StartX, NOISE_DATATYPE a_EndX,  ///< Noise-space coords of the array
-		NOISE_DATATYPE * a_Workspace = NULL              ///< Workspace that this function can use and trash
+		NOISE_DATATYPE * a_Workspace = nullptr              ///< Workspace that this function can use and trash
 	) const;
 	
 	
@@ -164,7 +164,7 @@ public:
 		int a_SizeX, int a_SizeY,                        ///< Count of the array, in each direction
 		NOISE_DATATYPE a_StartX, NOISE_DATATYPE a_EndX,  ///< Noise-space coords of the array in the X direction
 		NOISE_DATATYPE a_StartY, NOISE_DATATYPE a_EndY,  ///< Noise-space coords of the array in the Y direction
-		NOISE_DATATYPE * a_Workspace = NULL              ///< Workspace that this function can use and trash
+		NOISE_DATATYPE * a_Workspace = nullptr              ///< Workspace that this function can use and trash
 	) const;
 	
 	
@@ -174,7 +174,7 @@ public:
 		NOISE_DATATYPE a_StartX, NOISE_DATATYPE a_EndX,  ///< Noise-space coords of the array in the X direction
 		NOISE_DATATYPE a_StartY, NOISE_DATATYPE a_EndY,  ///< Noise-space coords of the array in the Y direction
 		NOISE_DATATYPE a_StartZ, NOISE_DATATYPE a_EndZ,  ///< Noise-space coords of the array in the Z direction
-		NOISE_DATATYPE * a_Workspace = NULL              ///< Workspace that this function can use and trash
+		NOISE_DATATYPE * a_Workspace = nullptr              ///< Workspace that this function can use and trash
 	) const;
 	
 protected:
@@ -219,7 +219,7 @@ public:
 		NOISE_DATATYPE * a_Array,                        ///< Array to generate into
 		int a_SizeX,                                     ///< Count of the array
 		NOISE_DATATYPE a_StartX, NOISE_DATATYPE a_EndX,  ///< Noise-space coords of the array
-		NOISE_DATATYPE * a_Workspace = NULL              ///< Workspace that this function can use and trash
+		NOISE_DATATYPE * a_Workspace = nullptr              ///< Workspace that this function can use and trash
 	) const;
 	
 	
@@ -228,7 +228,7 @@ public:
 		int a_SizeX, int a_SizeY,                        ///< Count of the array, in each direction
 		NOISE_DATATYPE a_StartX, NOISE_DATATYPE a_EndX,  ///< Noise-space coords of the array in the X direction
 		NOISE_DATATYPE a_StartY, NOISE_DATATYPE a_EndY,  ///< Noise-space coords of the array in the Y direction
-		NOISE_DATATYPE * a_Workspace = NULL              ///< Workspace that this function can use and trash
+		NOISE_DATATYPE * a_Workspace = nullptr              ///< Workspace that this function can use and trash
 	) const;
 	
 	
@@ -238,7 +238,7 @@ public:
 		NOISE_DATATYPE a_StartX, NOISE_DATATYPE a_EndX,  ///< Noise-space coords of the array in the X direction
 		NOISE_DATATYPE a_StartY, NOISE_DATATYPE a_EndY,  ///< Noise-space coords of the array in the Y direction
 		NOISE_DATATYPE a_StartZ, NOISE_DATATYPE a_EndZ,  ///< Noise-space coords of the array in the Z direction
-		NOISE_DATATYPE * a_Workspace = NULL              ///< Workspace that this function can use and trash
+		NOISE_DATATYPE * a_Workspace = nullptr              ///< Workspace that this function can use and trash
 	) const;
 	
 protected:
diff --git a/src/OSSupport/Errors.cpp b/src/OSSupport/Errors.cpp
index 9401ec257..a5361e1a6 100644
--- a/src/OSSupport/Errors.cpp
+++ b/src/OSSupport/Errors.cpp
@@ -10,7 +10,7 @@ AString GetOSErrorString( int a_ErrNo)
 
 	#ifdef _WIN32
 
-	FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, NULL, a_ErrNo, 0, buffer, ARRAYCOUNT(buffer), NULL);
+	FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, nullptr, a_ErrNo, 0, buffer, ARRAYCOUNT(buffer), nullptr);
 	Printf(Out, "%d: %s", a_ErrNo, buffer);
 	if (!Out.empty() && (Out[Out.length() - 1] == '\n'))
 	{
@@ -25,7 +25,7 @@ AString GetOSErrorString( int a_ErrNo)
 	#if !defined(__APPLE__) && ( _GNU_SOURCE) && !defined(ANDROID_NDK)  // GNU version of strerror_r()
 	
 	char * res = strerror_r( errno, buffer, ARRAYCOUNT(buffer));
-	if (res != NULL)
+	if (res != nullptr)
 	{
 		Printf(Out, "%d: %s", a_ErrNo, res);
 		return Out;
diff --git a/src/OSSupport/Event.cpp b/src/OSSupport/Event.cpp
index 7cf8a826c..87bc110ce 100644
--- a/src/OSSupport/Event.cpp
+++ b/src/OSSupport/Event.cpp
@@ -15,8 +15,8 @@
 cEvent::cEvent(void)
 {
 #ifdef _WIN32
-	m_Event = CreateEvent(NULL, FALSE, FALSE, NULL);
-	if (m_Event == NULL)
+	m_Event = CreateEvent(nullptr, FALSE, FALSE, nullptr);
+	if (m_Event == nullptr)
 	{
 		LOGERROR("cEvent: cannot create event, GLE = %u. Aborting server.", (unsigned)GetLastError());
 		abort();
@@ -71,7 +71,7 @@ cEvent::~cEvent()
 	{
 		sem_destroy(m_Event);
 		delete m_Event;
-		m_Event = NULL;
+		m_Event = nullptr;
 	}
 #endif
 }
diff --git a/src/OSSupport/File.cpp b/src/OSSupport/File.cpp
index cb6031da6..8957dfaef 100644
--- a/src/OSSupport/File.cpp
+++ b/src/OSSupport/File.cpp
@@ -17,7 +17,7 @@
 
 cFile::cFile(void) :
 	#ifdef USE_STDIO_FILE
-	m_File(NULL)
+	m_File(nullptr)
 	#else
 	m_File(INVALID_HANDLE_VALUE)
 	#endif  // USE_STDIO_FILE
@@ -31,7 +31,7 @@ cFile::cFile(void) :
 
 cFile::cFile(const AString & iFileName, eMode iMode) :
 	#ifdef USE_STDIO_FILE
-	m_File(NULL)
+	m_File(nullptr)
 	#else
 	m_File(INVALID_HANDLE_VALUE)
 	#endif  // USE_STDIO_FILE
@@ -64,7 +64,7 @@ bool cFile::Open(const AString & iFileName, eMode iMode)
 		Close();
 	}
 	
-	const char * Mode = NULL;
+	const char * Mode = nullptr;
 	switch (iMode)
 	{
 		case fmRead:      Mode = "rb";  break;
@@ -72,7 +72,7 @@ bool cFile::Open(const AString & iFileName, eMode iMode)
 		case fmReadWrite: Mode = "rb+"; break;
 		case fmAppend:    Mode = "a+";  break;
 	}
-	if (Mode == NULL)
+	if (Mode == nullptr)
 	{
 		ASSERT(!"Unhandled file mode");
 		return false;
@@ -84,7 +84,7 @@ bool cFile::Open(const AString & iFileName, eMode iMode)
 	m_File = fopen((FILE_IO_PREFIX + iFileName).c_str(), Mode);
 #endif  // _WIN32
 
-	if ((m_File == NULL) && (iMode == fmReadWrite))
+	if ((m_File == nullptr) && (iMode == fmReadWrite))
 	{
 		// Fix for MS not following C spec, opening "a" mode files for writing at the end only
 		// The file open operation has been tried with "read update", fails if file not found
@@ -98,7 +98,7 @@ bool cFile::Open(const AString & iFileName, eMode iMode)
 #endif  // _WIN32
 
 	}
-	return (m_File != NULL);
+	return (m_File != nullptr);
 }
 
 
@@ -114,7 +114,7 @@ void cFile::Close(void)
 	}
 
 	fclose(m_File);
-	m_File = NULL;
+	m_File = nullptr;
 }
 
 
@@ -123,7 +123,7 @@ void cFile::Close(void)
 
 bool cFile::IsOpen(void) const
 {
-	return (m_File != NULL);
+	return (m_File != nullptr);
 }
 
 
@@ -366,7 +366,7 @@ int cFile::GetSize(const AString & a_FileName)
 bool cFile::CreateFolder(const AString & a_FolderPath)
 {
 	#ifdef _WIN32
-		return (CreateDirectoryA(a_FolderPath.c_str(), NULL) != 0);
+		return (CreateDirectoryA(a_FolderPath.c_str(), nullptr) != 0);
 	#else
 		return (mkdir(a_FolderPath.c_str(), S_IRWXU | S_IRWXG | S_IRWXO) == 0);
 	#endif
@@ -415,13 +415,13 @@ AStringVector cFile::GetFolderContents(const AString & a_Folder)
 	{
 		Folder = ".";
 	}
-	if ((dp = opendir(Folder.c_str())) == NULL)
+	if ((dp = opendir(Folder.c_str())) == nullptr)
 	{
 		LOGERROR("Error (%i) opening directory \"%s\"\n", errno, Folder.c_str());
 	}
 	else
 	{
-		while ((dirp = readdir(dp)) != NULL)
+		while ((dirp = readdir(dp)) != nullptr)
 		{
 			AllFiles.push_back(dirp->d_name);
 		}
diff --git a/src/OSSupport/GZipFile.cpp b/src/OSSupport/GZipFile.cpp
index 22d887783..32d84a0d5 100644
--- a/src/OSSupport/GZipFile.cpp
+++ b/src/OSSupport/GZipFile.cpp
@@ -11,7 +11,7 @@
 
 
 cGZipFile::cGZipFile(void) :
-	m_File(NULL), m_Mode(fmRead)
+	m_File(nullptr), m_Mode(fmRead)
 {
 }
 
@@ -30,14 +30,14 @@ cGZipFile::~cGZipFile()
 
 bool cGZipFile::Open(const AString & a_FileName, eMode a_Mode)
 {
-	if (m_File != NULL)
+	if (m_File != nullptr)
 	{
 		ASSERT(!"A file is already open in this object");
 		return false;
 	}
 	m_File = gzopen(a_FileName.c_str(), (a_Mode == fmRead) ? "r" : "w");
 	m_Mode = a_Mode;
-	return (m_File != NULL);
+	return (m_File != nullptr);
 }
 
 
@@ -46,10 +46,10 @@ bool cGZipFile::Open(const AString & a_FileName, eMode a_Mode)
 
 void cGZipFile::Close(void)
 {
-	if (m_File != NULL)
+	if (m_File != nullptr)
 	{
 		gzclose(m_File);
-		m_File = NULL;
+		m_File = nullptr;
 	}
 }
 
@@ -59,7 +59,7 @@ void cGZipFile::Close(void)
 
 int cGZipFile::ReadRestOfFile(AString & a_Contents)
 {
-	if (m_File == NULL)
+	if (m_File == nullptr)
 	{
 		ASSERT(!"No file has been opened");
 		return -1;
@@ -90,7 +90,7 @@ int cGZipFile::ReadRestOfFile(AString & a_Contents)
 
 bool cGZipFile::Write(const char * a_Contents, int a_Size)
 {
-	if (m_File == NULL)
+	if (m_File == nullptr)
 	{
 		ASSERT(!"No file has been opened");
 		return false;
diff --git a/src/OSSupport/ListenThread.cpp b/src/OSSupport/ListenThread.cpp
index 02e98acfc..b029634e9 100644
--- a/src/OSSupport/ListenThread.cpp
+++ b/src/OSSupport/ListenThread.cpp
@@ -214,7 +214,7 @@ void cListenThread::Execute(void)
 		timeval tv;  // On Linux select() doesn't seem to wake up when socket is closed, so let's kinda busy-wait:
 		tv.tv_sec = 1;
 		tv.tv_usec = 0;
-		if (select((int)Highest + 1, &fdRead, NULL, NULL, &tv) == -1)
+		if (select((int)Highest + 1, &fdRead, nullptr, nullptr, &tv) == -1)
 		{
 			LOG("select(R) call failed in cListenThread: \"%s\"", cSocket::GetLastErrorString().c_str());
 			continue;
diff --git a/src/OSSupport/Semaphore.cpp b/src/OSSupport/Semaphore.cpp
index c1fc7d9c7..6a2d57901 100644
--- a/src/OSSupport/Semaphore.cpp
+++ b/src/OSSupport/Semaphore.cpp
@@ -36,7 +36,7 @@ cSemaphore::cSemaphore( unsigned int a_MaxCount, unsigned int a_InitialCount /*
 	}
 #else
 	m_Handle = CreateSemaphore(
-		NULL,  // security attribute
+		nullptr,  // security attribute
 		a_InitialCount,  // initial count
 		a_MaxCount,  // maximum count
 		0  // name (optional)
@@ -98,7 +98,7 @@ void cSemaphore::Signal()
 		LOG("ERROR: Could not signal cSemaphore. (%i)", errno);
 	}
 #else
-	ReleaseSemaphore( m_Handle, 1, NULL);
+	ReleaseSemaphore( m_Handle, 1, nullptr);
 #endif
 }
 
diff --git a/src/OSSupport/Socket.cpp b/src/OSSupport/Socket.cpp
index c07d31c8b..5025a09ad 100644
--- a/src/OSSupport/Socket.cpp
+++ b/src/OSSupport/Socket.cpp
@@ -292,7 +292,7 @@ bool cSocket::ConnectIPv4(const AString & a_HostNameOrAddr, unsigned short a_Por
 	{
 		// It is not an IP Address string, but rather a regular hostname, resolve:
 		hostent * hp = gethostbyname(a_HostNameOrAddr.c_str());
-		if (hp == NULL)
+		if (hp == nullptr)
 		{
 			LOGWARNING("%s: Could not resolve hostname \"%s\"", __FUNCTION__, a_HostNameOrAddr.c_str());
 			CloseSocket();
diff --git a/src/OSSupport/SocketThreads.cpp b/src/OSSupport/SocketThreads.cpp
index f436318a5..7a3ef4274 100644
--- a/src/OSSupport/SocketThreads.cpp
+++ b/src/OSSupport/SocketThreads.cpp
@@ -61,7 +61,7 @@ bool cSocketThreads::AddClient(const cSocket & a_Socket, cCallback * a_Client)
 		// There was an error launching the thread (but it was already logged along with the reason)
 		LOGERROR("A new cSocketThread failed to start");
 		delete Thread;
-		Thread = NULL;
+		Thread = nullptr;
 		return false;
 	}
 	Thread->AddClient(a_Socket, a_Client);
@@ -233,7 +233,7 @@ bool cSocketThreads::cSocketThread::RemoveClient(const cCallback * a_Client)
 				// More data to send, shut down reading and wait for the rest to get sent:
 				m_Slots[i].m_State = sSlot::ssWritingRestOut;
 			}
-			m_Slots[i].m_Client = NULL;
+			m_Slots[i].m_Client = nullptr;
 		}
 		
 		// Notify the thread of the change:
@@ -407,7 +407,7 @@ void cSocketThreads::cSocketThread::Execute(void)
 		timeval Timeout;
 		Timeout.tv_sec = 5;
 		Timeout.tv_usec = 0;
-		if (select((int)Highest + 1, &fdRead, &fdWrite, NULL, &Timeout) == -1)
+		if (select((int)Highest + 1, &fdRead, &fdWrite, nullptr, &Timeout) == -1)
 		{
 			LOG("select() call failed in cSocketThread: \"%s\"", cSocket::GetLastErrorString().c_str());
 			continue;
@@ -519,7 +519,7 @@ void cSocketThreads::cSocketThread::ReadFromSockets(fd_set * a_Read)
 		}
 		else
 		{
-			if (m_Slots[i].m_Client != NULL)
+			if (m_Slots[i].m_Client != nullptr)
 			{
 				m_Slots[i].m_Client->DataReceived(Buffer, Received);
 			}
@@ -545,7 +545,7 @@ void cSocketThreads::cSocketThread::WriteToSockets(fd_set * a_Write)
 		if (m_Slots[i].m_Outgoing.empty())
 		{
 			// Request another chunk of outgoing data:
-			if (m_Slots[i].m_Client != NULL)
+			if (m_Slots[i].m_Client != nullptr)
 			{
 				AString Data;
 				m_Slots[i].m_Client->GetOutgoingData(Data);
@@ -573,7 +573,7 @@ void cSocketThreads::cSocketThread::WriteToSockets(fd_set * a_Write)
 			int Err = cSocket::GetLastError();
 			LOGWARNING("Error %d while writing to client \"%s\", disconnecting. \"%s\"", Err, m_Slots[i].m_Socket.GetIPString().c_str(), GetOSErrorString(Err).c_str());
 			m_Slots[i].m_Socket.CloseSocket();
-			if (m_Slots[i].m_Client != NULL)
+			if (m_Slots[i].m_Client != nullptr)
 			{
 				m_Slots[i].m_Client->SocketClosed();
 			}
@@ -668,7 +668,7 @@ void cSocketThreads::cSocketThread::QueueOutgoingData(void)
 	cCSLock Lock(m_Parent->m_CS);
 	for (int i = 0; i < m_NumSlots; i++)
 	{
-		if (m_Slots[i].m_Client != NULL)
+		if (m_Slots[i].m_Client != nullptr)
 		{
 			AString Data;
 			m_Slots[i].m_Client->GetOutgoingData(Data);
diff --git a/src/OSSupport/SocketThreads.h b/src/OSSupport/SocketThreads.h
index 944f5f3bc..df819468d 100644
--- a/src/OSSupport/SocketThreads.h
+++ b/src/OSSupport/SocketThreads.h
@@ -137,7 +137,7 @@ private:
 			/** The socket is primarily owned by this object */
 			cSocket m_Socket;
 			
-			/** The callback to call for events. May be NULL */
+			/** The callback to call for events. May be nullptr */
 			cCallback * m_Client;
 			
 			/** If sending writes only partial data, the rest is stored here for another send.
diff --git a/src/PolarSSL++/BlockingSslClientSocket.cpp b/src/PolarSSL++/BlockingSslClientSocket.cpp
index 699bc57ee..59e1281ac 100644
--- a/src/PolarSSL++/BlockingSslClientSocket.cpp
+++ b/src/PolarSSL++/BlockingSslClientSocket.cpp
@@ -48,7 +48,7 @@ bool cBlockingSslClientSocket::Connect(const AString & a_ServerName, UInt16 a_Po
 	}
 	
 	// If we have been assigned a trusted CA root cert store, push it into the SSL context:
-	if (m_CACerts.get() != NULL)
+	if (m_CACerts.get() != nullptr)
 	{
 		m_Ssl.SetCACerts(m_CACerts, m_ExpectedPeerName);
 	}
@@ -72,7 +72,7 @@ bool cBlockingSslClientSocket::Connect(const AString & a_ServerName, UInt16 a_Po
 bool cBlockingSslClientSocket::SetTrustedRootCertsFromString(const AString & a_CACerts, const AString & a_ExpectedPeerName)
 {
 	// Warn if used multiple times, but don't signal an error:
-	if (m_CACerts.get() != NULL)
+	if (m_CACerts.get() != nullptr)
 	{
 		LOGWARNING(
 			"SSL: Trying to set multiple trusted CA root cert stores, only the last one will be used. Name: %s",
diff --git a/src/PolarSSL++/CallbackSslContext.cpp b/src/PolarSSL++/CallbackSslContext.cpp
index c4d19b2a0..e061e3f03 100644
--- a/src/PolarSSL++/CallbackSslContext.cpp
+++ b/src/PolarSSL++/CallbackSslContext.cpp
@@ -12,7 +12,7 @@
 
 
 cCallbackSslContext::cCallbackSslContext(void) :
-	m_Callbacks(NULL)
+	m_Callbacks(nullptr)
 {
 	// Nothing needed, but the constructor needs to exist so
 }
@@ -32,7 +32,7 @@ cCallbackSslContext::cCallbackSslContext(cCallbackSslContext::cDataCallbacks & a
 
 int cCallbackSslContext::ReceiveEncrypted(unsigned char * a_Buffer, size_t a_NumBytes)
 {
-	if (m_Callbacks == NULL)
+	if (m_Callbacks == nullptr)
 	{
 		LOGWARNING("SSL: Trying to receive data with no callbacks, aborting.");
 		return POLARSSL_ERR_NET_RECV_FAILED;
@@ -46,7 +46,7 @@ int cCallbackSslContext::ReceiveEncrypted(unsigned char * a_Buffer, size_t a_Num
 
 int cCallbackSslContext::SendEncrypted(const unsigned char * a_Buffer, size_t a_NumBytes)
 {
-	if (m_Callbacks == NULL)
+	if (m_Callbacks == nullptr)
 	{
 		LOGWARNING("SSL: Trying to send data with no callbacks, aborting.");
 		return POLARSSL_ERR_NET_SEND_FAILED;
diff --git a/src/PolarSSL++/CryptoKey.cpp b/src/PolarSSL++/CryptoKey.cpp
index 0763c387b..7c4f021b3 100644
--- a/src/PolarSSL++/CryptoKey.cpp
+++ b/src/PolarSSL++/CryptoKey.cpp
@@ -123,7 +123,7 @@ int cCryptoKey::ParsePrivate(const void * a_Data, size_t a_NumBytes, const AStri
 	
 	if (a_Password.empty())
 	{
-		return pk_parse_key(&m_Pk, (const unsigned char *)a_Data, a_NumBytes, NULL, 0);
+		return pk_parse_key(&m_Pk, (const unsigned char *)a_Data, a_NumBytes, nullptr, 0);
 	}
 	else
 	{
diff --git a/src/PolarSSL++/SslContext.cpp b/src/PolarSSL++/SslContext.cpp
index 482470c3a..902267f90 100644
--- a/src/PolarSSL++/SslContext.cpp
+++ b/src/PolarSSL++/SslContext.cpp
@@ -46,7 +46,7 @@ int cSslContext::Initialize(bool a_IsClient, const SharedPtr<cCtrDrbgContext> &
 	
 	// Set the CtrDrbg context, create a new one if needed:
 	m_CtrDrbg = a_CtrDrbg;
-	if (m_CtrDrbg.get() == NULL)
+	if (m_CtrDrbg.get() == nullptr)
 	{
 		m_CtrDrbg.reset(new cCtrDrbgContext);
 		m_CtrDrbg->Initialize("MCServer", 8);
@@ -98,7 +98,7 @@ void cSslContext::SetOwnCert(const cX509CertPtr & a_OwnCert, const cRsaPrivateKe
 	ASSERT(m_IsValid);  // Call Initialize() first
 	
 	// Check that both the cert and the key is valid:
-	if ((a_OwnCert.get() == NULL) || (a_OwnCertPrivKey.get() == NULL))
+	if ((a_OwnCert.get() == nullptr) || (a_OwnCertPrivKey.get() == nullptr))
 	{
 		LOGWARNING("SSL: Own certificate is not valid, skipping the set.");
 		return;
@@ -121,7 +121,7 @@ void cSslContext::SetOwnCert(const cX509CertPtr & a_OwnCert, const cCryptoKeyPtr
 	ASSERT(m_IsValid);  // Call Initialize() first
 	
 	// Check that both the cert and the key is valid:
-	if ((a_OwnCert.get() == NULL) || (a_OwnCertPrivKey.get() == NULL))
+	if ((a_OwnCert.get() == nullptr) || (a_OwnCertPrivKey.get() == nullptr))
 	{
 		LOGWARNING("SSL: Own certificate is not valid, skipping the set.");
 		return;
@@ -150,7 +150,7 @@ void cSslContext::SetCACerts(const cX509CertPtr & a_CACert, const AString & a_Ex
 	
 	// Set the trusted CA root cert store:
 	ssl_set_authmode(&m_Ssl, SSL_VERIFY_REQUIRED);
-	ssl_set_ca_chain(&m_Ssl, m_CACerts->GetInternal(), NULL, m_ExpectedPeerName.empty() ? NULL : m_ExpectedPeerName.c_str());
+	ssl_set_ca_chain(&m_Ssl, m_CACerts->GetInternal(), nullptr, m_ExpectedPeerName.empty() ? nullptr : m_ExpectedPeerName.c_str());
 }
 
 
diff --git a/src/Protocol/MojangAPI.cpp b/src/Protocol/MojangAPI.cpp
index a4b4dbd3b..dd0d62af5 100644
--- a/src/Protocol/MojangAPI.cpp
+++ b/src/Protocol/MojangAPI.cpp
@@ -196,7 +196,7 @@ cMojangAPI::cMojangAPI(void) :
 	m_NameToUUIDAddress(DEFAULT_NAME_TO_UUID_ADDRESS),
 	m_UUIDToProfileServer(DEFAULT_UUID_TO_PROFILE_SERVER),
 	m_UUIDToProfileAddress(DEFAULT_UUID_TO_PROFILE_ADDRESS),
-	m_RankMgr(NULL),
+	m_RankMgr(nullptr),
 	m_UpdateThread(new cUpdateThread())
 {
 }
@@ -335,7 +335,7 @@ AStringVector cMojangAPI::GetUUIDsFromPlayerNames(const AStringVector & a_Player
 void cMojangAPI::AddPlayerNameToUUIDMapping(const AString & a_PlayerName, const AString & a_UUID)
 {
 	AString UUID = MakeUUIDShort(a_UUID);
-	Int64 Now = time(NULL);
+	Int64 Now = time(nullptr);
 	{
 		cCSLock Lock(m_CSNameToUUID);
 		m_NameToUUID[StrToLower(a_PlayerName)] = sProfile(a_PlayerName, UUID, "", "", Now);
@@ -354,7 +354,7 @@ void cMojangAPI::AddPlayerNameToUUIDMapping(const AString & a_PlayerName, const
 void cMojangAPI::AddPlayerProfile(const AString & a_PlayerName, const AString & a_UUID, const Json::Value & a_Properties)
 {
 	AString UUID = MakeUUIDShort(a_UUID);
-	Int64 Now = time(NULL);
+	Int64 Now = time(nullptr);
 	{
 		cCSLock Lock(m_CSNameToUUID);
 		m_NameToUUID[StrToLower(a_PlayerName)] = sProfile(a_PlayerName, UUID, "", "", Now);
@@ -558,7 +558,7 @@ void cMojangAPI::SaveCachesToDisk(void)
 		db.exec("DELETE FROM UUIDToProfile");
 		
 		// Save all cache entries - m_PlayerNameToUUID:
-		Int64 LimitDateTime = time(NULL) - MAX_AGE;
+		Int64 LimitDateTime = time(nullptr) - MAX_AGE;
 		{
 			SQLite::Statement stmt(db, "INSERT INTO PlayerNameToUUID(PlayerName, UUID, DateTime) VALUES (?, ?, ?)");
 			cCSLock Lock(m_CSNameToUUID);
@@ -697,7 +697,7 @@ void cMojangAPI::QueryNamesToUUIDs(AStringVector & a_NamesToQuery)
 	
 		// Store the returned results into cache:
 		Json::Value::UInt JsonCount = root.size();
-		Int64 Now = time(NULL);
+		Int64 Now = time(nullptr);
 		{
 			cCSLock Lock(m_CSNameToUUID);
 			for (Json::Value::UInt idx = 0; idx < JsonCount; ++idx)
@@ -831,7 +831,7 @@ void cMojangAPI::QueryUUIDToProfile(const AString & a_UUID)
 		return;
 	}
 	Json::Value Properties = root.get("properties", "");
-	Int64 Now = time(NULL);
+	Int64 Now = time(nullptr);
 	{
 		cCSLock Lock(m_CSUUIDToProfile);
 		m_UUIDToProfile[a_UUID] = sProfile(PlayerName, a_UUID, Properties, Now);
@@ -855,7 +855,7 @@ void cMojangAPI::NotifyNameUUID(const AString & a_PlayerName, const AString & a_
 {
 	// Notify the rank manager:
 	cCSLock Lock(m_CSRankMgr);
-	if (m_RankMgr != NULL)
+	if (m_RankMgr != nullptr)
 	{
 		m_RankMgr->NotifyNameUUID(a_PlayerName, a_UUID);
 	}
@@ -867,7 +867,7 @@ void cMojangAPI::NotifyNameUUID(const AString & a_PlayerName, const AString & a_
 
 void cMojangAPI::Update(void)
 {
-	Int64 LimitDateTime = time(NULL) - MAX_AGE;
+	Int64 LimitDateTime = time(nullptr) - MAX_AGE;
 
 	// Re-query all playernames that are stale:
 	AStringVector PlayerNames;
diff --git a/src/Protocol/MojangAPI.h b/src/Protocol/MojangAPI.h
index 393fd4baa..0dc2617b6 100644
--- a/src/Protocol/MojangAPI.h
+++ b/src/Protocol/MojangAPI.h
@@ -89,7 +89,7 @@ public:
 	the profile to the respective mapping caches and updtes their datetime stamp to now. */
 	void AddPlayerProfile(const AString & a_PlayerName, const AString & a_UUID, const Json::Value & a_Properties);
 
-	/** Sets the m_RankMgr that is used for name-uuid notifications. Accepts NULL to remove the binding. */
+	/** Sets the m_RankMgr that is used for name-uuid notifications. Accepts nullptr to remove the binding. */
 	void SetRankManager(cRankManager * a_RankManager) { m_RankMgr = a_RankManager; }
 
 protected:
@@ -112,7 +112,7 @@ protected:
 			m_UUID(),
 			m_Textures(),
 			m_TexturesSignature(),
-			m_DateTime(time(NULL))
+			m_DateTime(time(nullptr))
 		{
 		}
 		
@@ -176,7 +176,7 @@ protected:
 	/** Protects m_UUIDToProfile against simultaneous multi-threaded access. */
 	cCriticalSection m_CSUUIDToProfile;
 
-	/** The rank manager that is notified of the name-uuid pairings. May be NULL. Protected by m_CSRankMgr. */
+	/** The rank manager that is notified of the name-uuid pairings. May be nullptr. Protected by m_CSRankMgr. */
 	cRankManager * m_RankMgr;
 
 	/** Protects m_RankMgr agains simultaneous multi-threaded access. */
diff --git a/src/Protocol/Protocol17x.cpp b/src/Protocol/Protocol17x.cpp
index f4779d83b..f33d37b30 100644
--- a/src/Protocol/Protocol17x.cpp
+++ b/src/Protocol/Protocol17x.cpp
@@ -120,7 +120,7 @@ cProtocol172::cProtocol172(cClientHandle * a_Client, const AString & a_ServerAdd
 	{
 		static int sCounter = 0;
 		cFile::CreateFolder("CommLogs");
-		AString FileName = Printf("CommLogs/%x_%d__%s.log", (unsigned)time(NULL), sCounter++, a_Client->GetIPString().c_str());
+		AString FileName = Printf("CommLogs/%x_%d__%s.log", (unsigned)time(nullptr), sCounter++, a_Client->GetIPString().c_str());
 		m_CommLogFile.Open(FileName, cFile::fmWrite);
 	}
 }
@@ -159,7 +159,7 @@ void cProtocol172::SendAttachEntity(const cEntity & a_Entity, const cEntity * a_
 	
 	cPacketizer Pkt(*this, 0x1b);  // Attach Entity packet
 	Pkt.WriteInt(a_Entity.GetUniqueID());
-	Pkt.WriteInt((a_Vehicle != NULL) ? a_Vehicle->GetUniqueID() : 0);
+	Pkt.WriteInt((a_Vehicle != nullptr) ? a_Vehicle->GetUniqueID() : 0);
 	Pkt.WriteBool(false);
 }
 
@@ -254,7 +254,7 @@ void cProtocol172::SendChat(const cCompositeChat & a_Message)
 	ASSERT(m_State == 3);  // In game mode?
 
 	cWorld * World = m_Client->GetPlayer()->GetWorld();
-	bool ShouldUseChatPrefixes = (World == NULL) ? false : World->ShouldUseChatPrefixes();
+	bool ShouldUseChatPrefixes = (World == nullptr) ? false : World->ShouldUseChatPrefixes();
 
 	// Send the message to the client:
 	cPacketizer Pkt(*this, 0x02);
diff --git a/src/Protocol/Protocol18x.cpp b/src/Protocol/Protocol18x.cpp
index 39046e2ed..8445e8f26 100644
--- a/src/Protocol/Protocol18x.cpp
+++ b/src/Protocol/Protocol18x.cpp
@@ -107,7 +107,7 @@ cProtocol180::cProtocol180(cClientHandle * a_Client, const AString & a_ServerAdd
 	{
 		static int sCounter = 0;
 		cFile::CreateFolder("CommLogs");
-		AString FileName = Printf("CommLogs/%x_%d__%s.log", (unsigned)time(NULL), sCounter++, a_Client->GetIPString().c_str());
+		AString FileName = Printf("CommLogs/%x_%d__%s.log", (unsigned)time(nullptr), sCounter++, a_Client->GetIPString().c_str());
 		m_CommLogFile.Open(FileName, cFile::fmWrite);
 	}
 }
@@ -146,7 +146,7 @@ void cProtocol180::SendAttachEntity(const cEntity & a_Entity, const cEntity * a_
 	
 	cPacketizer Pkt(*this, 0x1b);  // Attach Entity packet
 	Pkt.WriteInt(a_Entity.GetUniqueID());
-	Pkt.WriteInt((a_Vehicle != NULL) ? a_Vehicle->GetUniqueID() : 0);
+	Pkt.WriteInt((a_Vehicle != nullptr) ? a_Vehicle->GetUniqueID() : 0);
 	Pkt.WriteBool(false);
 }
 
@@ -234,7 +234,7 @@ void cProtocol180::SendChat(const cCompositeChat & a_Message)
 	ASSERT(m_State == 3);  // In game mode?
 
 	cWorld * World = m_Client->GetPlayer()->GetWorld();
-	bool ShouldUseChatPrefixes = (World == NULL) ? false : World->ShouldUseChatPrefixes();
+	bool ShouldUseChatPrefixes = (World == nullptr) ? false : World->ShouldUseChatPrefixes();
 
 	// Send the message to the client:
 	cPacketizer Pkt(*this, 0x02);
diff --git a/src/Protocol/ProtocolRecognizer.cpp b/src/Protocol/ProtocolRecognizer.cpp
index 0c1e83b67..af9e0d1bc 100644
--- a/src/Protocol/ProtocolRecognizer.cpp
+++ b/src/Protocol/ProtocolRecognizer.cpp
@@ -22,7 +22,7 @@
 
 cProtocolRecognizer::cProtocolRecognizer(cClientHandle * a_Client) :
 	super(a_Client),
-	m_Protocol(NULL),
+	m_Protocol(nullptr),
 	m_Buffer(8192)     // We need a larger buffer to support BungeeCord - it sends one huge packet at the start
 {
 }
@@ -34,7 +34,7 @@ cProtocolRecognizer::cProtocolRecognizer(cClientHandle * a_Client) :
 cProtocolRecognizer::~cProtocolRecognizer()
 {
 	delete m_Protocol;
-	m_Protocol = NULL;
+	m_Protocol = nullptr;
 }
 
 
@@ -59,7 +59,7 @@ AString cProtocolRecognizer::GetVersionTextFromInt(int a_ProtocolVersion)
 
 void cProtocolRecognizer::DataReceived(const char * a_Data, size_t a_Size)
 {
-	if (m_Protocol == NULL)
+	if (m_Protocol == nullptr)
 	{
 		if (!m_Buffer.Write(a_Data, a_Size))
 		{
@@ -90,7 +90,7 @@ void cProtocolRecognizer::DataReceived(const char * a_Data, size_t a_Size)
 
 void cProtocolRecognizer::SendAttachEntity(const cEntity & a_Entity, const cEntity * a_Vehicle)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendAttachEntity(a_Entity, a_Vehicle);
 }
 
@@ -100,7 +100,7 @@ void cProtocolRecognizer::SendAttachEntity(const cEntity & a_Entity, const cEnti
 
 void cProtocolRecognizer::SendBlockAction(int a_BlockX, int a_BlockY, int a_BlockZ, char a_Byte1, char a_Byte2, BLOCKTYPE a_BlockType)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendBlockAction(a_BlockX, a_BlockY, a_BlockZ, a_Byte1, a_Byte2, a_BlockType);
 }
 
@@ -110,7 +110,7 @@ void cProtocolRecognizer::SendBlockAction(int a_BlockX, int a_BlockY, int a_Bloc
 
 void cProtocolRecognizer::SendBlockBreakAnim(int a_entityID, int a_BlockX, int a_BlockY, int a_BlockZ, char stage)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendBlockBreakAnim(a_entityID, a_BlockX, a_BlockY, a_BlockZ, stage);
 }
 
@@ -120,7 +120,7 @@ void cProtocolRecognizer::SendBlockBreakAnim(int a_entityID, int a_BlockX, int a
 
 void cProtocolRecognizer::SendBlockChange(int a_BlockX, int a_BlockY, int a_BlockZ, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendBlockChange(a_BlockX, a_BlockY, a_BlockZ, a_BlockType, a_BlockMeta);
 }
 
@@ -130,7 +130,7 @@ void cProtocolRecognizer::SendBlockChange(int a_BlockX, int a_BlockY, int a_Bloc
 
 void cProtocolRecognizer::SendBlockChanges(int a_ChunkX, int a_ChunkZ, const sSetBlockVector & a_Changes)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendBlockChanges(a_ChunkX, a_ChunkZ, a_Changes);
 }
 
@@ -140,7 +140,7 @@ void cProtocolRecognizer::SendBlockChanges(int a_ChunkX, int a_ChunkZ, const sSe
 
 void cProtocolRecognizer::SendChat(const AString & a_Message)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendChat(a_Message);
 }
 
@@ -150,7 +150,7 @@ void cProtocolRecognizer::SendChat(const AString & a_Message)
 
 void cProtocolRecognizer::SendChat(const cCompositeChat & a_Message)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendChat(a_Message);
 }
 
@@ -160,7 +160,7 @@ void cProtocolRecognizer::SendChat(const cCompositeChat & a_Message)
 
 void cProtocolRecognizer::SendChunkData(int a_ChunkX, int a_ChunkZ, cChunkDataSerializer & a_Serializer)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendChunkData(a_ChunkX, a_ChunkZ, a_Serializer);
 }
 
@@ -170,7 +170,7 @@ void cProtocolRecognizer::SendChunkData(int a_ChunkX, int a_ChunkZ, cChunkDataSe
 
 void cProtocolRecognizer::SendCollectEntity(const cEntity & a_Entity, const cPlayer & a_Player)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendCollectEntity(a_Entity, a_Player);
 }
 
@@ -180,7 +180,7 @@ void cProtocolRecognizer::SendCollectEntity(const cEntity & a_Entity, const cPla
 
 void cProtocolRecognizer::SendDestroyEntity(const cEntity & a_Entity)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendDestroyEntity(a_Entity);
 }
 
@@ -190,7 +190,7 @@ void cProtocolRecognizer::SendDestroyEntity(const cEntity & a_Entity)
 
 void cProtocolRecognizer::SendDisconnect(const AString & a_Reason)
 {
-	if (m_Protocol != NULL)
+	if (m_Protocol != nullptr)
 	{
 		m_Protocol->SendDisconnect(a_Reason);
 	}
@@ -212,7 +212,7 @@ void cProtocolRecognizer::SendDisconnect(const AString & a_Reason)
 
 void cProtocolRecognizer::SendEditSign(int a_BlockX, int a_BlockY, int a_BlockZ)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendEditSign(a_BlockX, a_BlockY, a_BlockZ);
 }
 
@@ -222,7 +222,7 @@ void cProtocolRecognizer::SendEditSign(int a_BlockX, int a_BlockY, int a_BlockZ)
 
 void cProtocolRecognizer::SendEntityEffect(const cEntity & a_Entity, int a_EffectID, int a_Amplifier, short a_Duration)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendEntityEffect(a_Entity, a_EffectID, a_Amplifier, a_Duration);
 }
 
@@ -232,7 +232,7 @@ void cProtocolRecognizer::SendEntityEffect(const cEntity & a_Entity, int a_Effec
 
 void cProtocolRecognizer::SendEntityEquipment(const cEntity & a_Entity, short a_SlotNum, const cItem & a_Item)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendEntityEquipment(a_Entity, a_SlotNum, a_Item);
 }
 
@@ -242,7 +242,7 @@ void cProtocolRecognizer::SendEntityEquipment(const cEntity & a_Entity, short a_
 
 void cProtocolRecognizer::SendEntityHeadLook(const cEntity & a_Entity)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendEntityHeadLook(a_Entity);
 }
 
@@ -252,7 +252,7 @@ void cProtocolRecognizer::SendEntityHeadLook(const cEntity & a_Entity)
 
 void cProtocolRecognizer::SendEntityLook(const cEntity & a_Entity)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendEntityLook(a_Entity);
 }
 
@@ -262,7 +262,7 @@ void cProtocolRecognizer::SendEntityLook(const cEntity & a_Entity)
 
 void cProtocolRecognizer::SendEntityMetadata(const cEntity & a_Entity)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendEntityMetadata(a_Entity);
 }
 
@@ -272,7 +272,7 @@ void cProtocolRecognizer::SendEntityMetadata(const cEntity & a_Entity)
 
 void cProtocolRecognizer::SendEntityProperties(const cEntity & a_Entity)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendEntityProperties(a_Entity);
 }
 
@@ -282,7 +282,7 @@ void cProtocolRecognizer::SendEntityProperties(const cEntity & a_Entity)
 
 void cProtocolRecognizer::SendEntityRelMove(const cEntity & a_Entity, char a_RelX, char a_RelY, char a_RelZ)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendEntityRelMove(a_Entity, a_RelX, a_RelY, a_RelZ);
 }
 
@@ -292,7 +292,7 @@ void cProtocolRecognizer::SendEntityRelMove(const cEntity & a_Entity, char a_Rel
 
 void cProtocolRecognizer::SendEntityRelMoveLook(const cEntity & a_Entity, char a_RelX, char a_RelY, char a_RelZ)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendEntityRelMoveLook(a_Entity, a_RelX, a_RelY, a_RelZ);
 }
 
@@ -302,7 +302,7 @@ void cProtocolRecognizer::SendEntityRelMoveLook(const cEntity & a_Entity, char a
 
 void cProtocolRecognizer::SendEntityStatus(const cEntity & a_Entity, char a_Status)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendEntityStatus(a_Entity, a_Status);
 }
 
@@ -312,7 +312,7 @@ void cProtocolRecognizer::SendEntityStatus(const cEntity & a_Entity, char a_Stat
 
 void cProtocolRecognizer::SendEntityVelocity(const cEntity & a_Entity)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendEntityVelocity(a_Entity);
 }
 
@@ -322,7 +322,7 @@ void cProtocolRecognizer::SendEntityVelocity(const cEntity & a_Entity)
 
 void cProtocolRecognizer::SendExplosion(double a_BlockX, double a_BlockY, double a_BlockZ, float a_Radius, const cVector3iArray & a_BlocksAffected, const Vector3d & a_PlayerMotion)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendExplosion(a_BlockX, a_BlockY, a_BlockZ, a_Radius, a_BlocksAffected, a_PlayerMotion);
 }
 
@@ -332,7 +332,7 @@ void cProtocolRecognizer::SendExplosion(double a_BlockX, double a_BlockY, double
 
 void cProtocolRecognizer::SendGameMode(eGameMode a_GameMode)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendGameMode(a_GameMode);
 }
 
@@ -342,7 +342,7 @@ void cProtocolRecognizer::SendGameMode(eGameMode a_GameMode)
 
 void cProtocolRecognizer::SendHealth(void)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendHealth();
 }
 
@@ -352,7 +352,7 @@ void cProtocolRecognizer::SendHealth(void)
 
 void cProtocolRecognizer::SendWindowProperty(const cWindow & a_Window, short a_Property, short a_Value)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendWindowProperty(a_Window, a_Property, a_Value);
 }
 
@@ -362,7 +362,7 @@ void cProtocolRecognizer::SendWindowProperty(const cWindow & a_Window, short a_P
 
 void cProtocolRecognizer::SendInventorySlot(char a_WindowID, short a_SlotNum, const cItem & a_Item)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendInventorySlot(a_WindowID, a_SlotNum, a_Item);
 }
 
@@ -372,7 +372,7 @@ void cProtocolRecognizer::SendInventorySlot(char a_WindowID, short a_SlotNum, co
 
 void cProtocolRecognizer::SendKeepAlive(int a_PingID)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendKeepAlive(a_PingID);
 }
 
@@ -382,7 +382,7 @@ void cProtocolRecognizer::SendKeepAlive(int a_PingID)
 
 void cProtocolRecognizer::SendLogin(const cPlayer & a_Player, const cWorld & a_World)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendLogin(a_Player, a_World);
 }
 
@@ -392,7 +392,7 @@ void cProtocolRecognizer::SendLogin(const cPlayer & a_Player, const cWorld & a_W
 
 void cProtocolRecognizer::SendLoginSuccess(void)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendLoginSuccess();
 }
 
@@ -402,7 +402,7 @@ void cProtocolRecognizer::SendLoginSuccess(void)
 
 void cProtocolRecognizer::SendMapColumn(int a_ID, int a_X, int a_Y, const Byte * a_Colors, unsigned int a_Length, unsigned int m_Scale)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendMapColumn(a_ID, a_X, a_Y, a_Colors, a_Length, m_Scale);
 }
 
@@ -412,7 +412,7 @@ void cProtocolRecognizer::SendMapColumn(int a_ID, int a_X, int a_Y, const Byte *
 
 void cProtocolRecognizer::SendMapDecorators(int a_ID, const cMapDecoratorList & a_Decorators, unsigned int m_Scale)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendMapDecorators(a_ID, a_Decorators, m_Scale);
 }
 
@@ -422,7 +422,7 @@ void cProtocolRecognizer::SendMapDecorators(int a_ID, const cMapDecoratorList &
 
 void cProtocolRecognizer::SendMapInfo(int a_ID, unsigned int a_Scale)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendMapInfo(a_ID, a_Scale);
 }
 
@@ -432,7 +432,7 @@ void cProtocolRecognizer::SendMapInfo(int a_ID, unsigned int a_Scale)
 
 void cProtocolRecognizer::SendParticleEffect(const AString & a_ParticleName, float a_SrcX, float a_SrcY, float a_SrcZ, float a_OffsetX, float a_OffsetY, float a_OffsetZ, float a_ParticleData, int a_ParticleAmount)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendParticleEffect(a_ParticleName, a_SrcX, a_SrcY, a_SrcZ, a_OffsetX, a_OffsetY, a_OffsetZ, a_ParticleData, a_ParticleAmount);
 }
 
@@ -450,7 +450,7 @@ void cProtocolRecognizer::SendPaintingSpawn(const cPainting & a_Painting)
 
 void cProtocolRecognizer::SendPickupSpawn(const cPickup & a_Pickup)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendPickupSpawn(a_Pickup);
 }
 
@@ -460,7 +460,7 @@ void cProtocolRecognizer::SendPickupSpawn(const cPickup & a_Pickup)
 
 void cProtocolRecognizer::SendPlayerAbilities(void)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendPlayerAbilities();
 }
 
@@ -470,7 +470,7 @@ void cProtocolRecognizer::SendPlayerAbilities(void)
 
 void cProtocolRecognizer::SendEntityAnimation(const cEntity & a_Entity, char a_Animation)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendEntityAnimation(a_Entity, a_Animation);
 }
 
@@ -480,7 +480,7 @@ void cProtocolRecognizer::SendEntityAnimation(const cEntity & a_Entity, char a_A
 
 void cProtocolRecognizer::SendPlayerListAddPlayer(const cPlayer & a_Player)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendPlayerListAddPlayer(a_Player);
 }
 
@@ -490,7 +490,7 @@ void cProtocolRecognizer::SendPlayerListAddPlayer(const cPlayer & a_Player)
 
 void cProtocolRecognizer::SendPlayerListRemovePlayer(const cPlayer & a_Player)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendPlayerListRemovePlayer(a_Player);
 }
 
@@ -500,7 +500,7 @@ void cProtocolRecognizer::SendPlayerListRemovePlayer(const cPlayer & a_Player)
 
 void cProtocolRecognizer::SendPlayerListUpdateGameMode(const cPlayer & a_Player)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendPlayerListUpdateGameMode(a_Player);
 }
 
@@ -510,7 +510,7 @@ void cProtocolRecognizer::SendPlayerListUpdateGameMode(const cPlayer & a_Player)
 
 void cProtocolRecognizer::SendPlayerListUpdatePing(const cPlayer & a_Player)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendPlayerListUpdatePing(a_Player);
 }
 
@@ -520,7 +520,7 @@ void cProtocolRecognizer::SendPlayerListUpdatePing(const cPlayer & a_Player)
 
 void cProtocolRecognizer::SendPlayerListUpdateDisplayName(const cPlayer & a_Player, const AString & a_CustomName)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendPlayerListUpdateDisplayName(a_Player, a_CustomName);
 }
 
@@ -530,7 +530,7 @@ void cProtocolRecognizer::SendPlayerListUpdateDisplayName(const cPlayer & a_Play
 
 void cProtocolRecognizer::SendPlayerMaxSpeed(void)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendPlayerMaxSpeed();
 }
 
@@ -540,7 +540,7 @@ void cProtocolRecognizer::SendPlayerMaxSpeed(void)
 
 void cProtocolRecognizer::SendPlayerMoveLook(void)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendPlayerMoveLook();
 }
 
@@ -550,7 +550,7 @@ void cProtocolRecognizer::SendPlayerMoveLook(void)
 
 void cProtocolRecognizer::SendPlayerPosition(void)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendPlayerPosition();
 }
 
@@ -560,7 +560,7 @@ void cProtocolRecognizer::SendPlayerPosition(void)
 
 void cProtocolRecognizer::SendPlayerSpawn(const cPlayer & a_Player)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendPlayerSpawn(a_Player);
 }
 
@@ -570,7 +570,7 @@ void cProtocolRecognizer::SendPlayerSpawn(const cPlayer & a_Player)
 
 void cProtocolRecognizer::SendPluginMessage(const AString & a_Channel, const AString & a_Message)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendPluginMessage(a_Channel, a_Message);
 }
 
@@ -580,7 +580,7 @@ void cProtocolRecognizer::SendPluginMessage(const AString & a_Channel, const ASt
 
 void cProtocolRecognizer::SendRemoveEntityEffect(const cEntity & a_Entity, int a_EffectID)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendRemoveEntityEffect(a_Entity, a_EffectID);
 }
 
@@ -590,7 +590,7 @@ void cProtocolRecognizer::SendRemoveEntityEffect(const cEntity & a_Entity, int a
 
 void cProtocolRecognizer::SendRespawn(eDimension a_Dimension, bool a_ShouldIgnoreDimensionChecks)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendRespawn(a_Dimension, a_ShouldIgnoreDimensionChecks);
 }
 
@@ -600,7 +600,7 @@ void cProtocolRecognizer::SendRespawn(eDimension a_Dimension, bool a_ShouldIgnor
 
 void cProtocolRecognizer::SendExperience(void)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendExperience();
 }
 
@@ -610,7 +610,7 @@ void cProtocolRecognizer::SendExperience(void)
 
 void cProtocolRecognizer::SendExperienceOrb(const cExpOrb & a_ExpOrb)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendExperienceOrb(a_ExpOrb);
 }
 
@@ -620,7 +620,7 @@ void cProtocolRecognizer::SendExperienceOrb(const cExpOrb & a_ExpOrb)
 
 void cProtocolRecognizer::SendScoreboardObjective(const AString & a_Name, const AString & a_DisplayName, Byte a_Mode)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendScoreboardObjective(a_Name, a_DisplayName, a_Mode);
 }
 
@@ -630,7 +630,7 @@ void cProtocolRecognizer::SendScoreboardObjective(const AString & a_Name, const
 
 void cProtocolRecognizer::SendScoreUpdate(const AString & a_Objective, const AString & a_Player, cObjective::Score a_Score, Byte a_Mode)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendScoreUpdate(a_Objective, a_Player, a_Score, a_Mode);
 }
 
@@ -640,7 +640,7 @@ void cProtocolRecognizer::SendScoreUpdate(const AString & a_Objective, const ASt
 
 void cProtocolRecognizer::SendDisplayObjective(const AString & a_Objective, cScoreboard::eDisplaySlot a_Display)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendDisplayObjective(a_Objective, a_Display);
 }
 
@@ -650,7 +650,7 @@ void cProtocolRecognizer::SendDisplayObjective(const AString & a_Objective, cSco
 
 void cProtocolRecognizer::SendSoundEffect(const AString & a_SoundName, double a_X, double a_Y, double a_Z, float a_Volume, float a_Pitch)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendSoundEffect(a_SoundName, a_X, a_Y, a_Z, a_Volume, a_Pitch);
 }
 
@@ -660,7 +660,7 @@ void cProtocolRecognizer::SendSoundEffect(const AString & a_SoundName, double a_
 
 void cProtocolRecognizer::SendSoundParticleEffect(int a_EffectID, int a_SrcX, int a_SrcY, int a_SrcZ, int a_Data)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendSoundParticleEffect(a_EffectID, a_SrcX, a_SrcY, a_SrcZ, a_Data);
 }
 
@@ -670,7 +670,7 @@ void cProtocolRecognizer::SendSoundParticleEffect(int a_EffectID, int a_SrcX, in
 
 void cProtocolRecognizer::SendSpawnFallingBlock(const cFallingBlock & a_FallingBlock)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendSpawnFallingBlock(a_FallingBlock);
 }
 
@@ -680,7 +680,7 @@ void cProtocolRecognizer::SendSpawnFallingBlock(const cFallingBlock & a_FallingB
 
 void cProtocolRecognizer::SendSpawnMob(const cMonster & a_Mob)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendSpawnMob(a_Mob);
 }
 
@@ -690,7 +690,7 @@ void cProtocolRecognizer::SendSpawnMob(const cMonster & a_Mob)
 
 void cProtocolRecognizer::SendSpawnObject(const cEntity & a_Entity, char a_ObjectType, int a_ObjectData, Byte a_Yaw, Byte a_Pitch)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendSpawnObject(a_Entity, a_ObjectType, a_ObjectData, a_Yaw, a_Pitch);
 }
 
@@ -700,7 +700,7 @@ void cProtocolRecognizer::SendSpawnObject(const cEntity & a_Entity, char a_Objec
 
 void cProtocolRecognizer::SendSpawnVehicle(const cEntity & a_Vehicle, char a_VehicleType, char a_VehicleSubType)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendSpawnVehicle(a_Vehicle, a_VehicleType, a_VehicleSubType);
 }
 
@@ -710,7 +710,7 @@ void cProtocolRecognizer::SendSpawnVehicle(const cEntity & a_Vehicle, char a_Veh
 
 void cProtocolRecognizer::SendStatistics(const cStatManager & a_Manager)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendStatistics(a_Manager);
 }
 
@@ -720,7 +720,7 @@ void cProtocolRecognizer::SendStatistics(const cStatManager & a_Manager)
 
 void cProtocolRecognizer::SendTabCompletionResults(const AStringVector & a_Results)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendTabCompletionResults(a_Results);
 }
 
@@ -730,7 +730,7 @@ void cProtocolRecognizer::SendTabCompletionResults(const AStringVector & a_Resul
 
 void cProtocolRecognizer::SendTeleportEntity(const cEntity & a_Entity)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendTeleportEntity(a_Entity);
 }
 
@@ -740,7 +740,7 @@ void cProtocolRecognizer::SendTeleportEntity(const cEntity & a_Entity)
 
 void cProtocolRecognizer::SendThunderbolt(int a_BlockX, int a_BlockY, int a_BlockZ)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendThunderbolt(a_BlockX, a_BlockY, a_BlockZ);
 }
 
@@ -750,7 +750,7 @@ void cProtocolRecognizer::SendThunderbolt(int a_BlockX, int a_BlockY, int a_Bloc
 
 void cProtocolRecognizer::SendTimeUpdate(Int64 a_WorldAge, Int64 a_TimeOfDay, bool a_DoDaylightCycle)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendTimeUpdate(a_WorldAge, a_TimeOfDay, a_DoDaylightCycle);
 }
 
@@ -760,7 +760,7 @@ void cProtocolRecognizer::SendTimeUpdate(Int64 a_WorldAge, Int64 a_TimeOfDay, bo
 
 void cProtocolRecognizer::SendUnloadChunk(int a_ChunkX, int a_ChunkZ)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendUnloadChunk(a_ChunkX, a_ChunkZ);
 }
 
@@ -770,7 +770,7 @@ void cProtocolRecognizer::SendUnloadChunk(int a_ChunkX, int a_ChunkZ)
 
 void cProtocolRecognizer::SendUpdateBlockEntity(cBlockEntity & a_BlockEntity)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendUpdateBlockEntity(a_BlockEntity);
 }
 
@@ -780,7 +780,7 @@ void cProtocolRecognizer::SendUpdateBlockEntity(cBlockEntity & a_BlockEntity)
 
 void cProtocolRecognizer::SendUpdateSign(int a_BlockX, int a_BlockY, int a_BlockZ, const AString & a_Line1, const AString & a_Line2, const AString & a_Line3, const AString & a_Line4)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendUpdateSign(a_BlockX, a_BlockY, a_BlockZ, a_Line1, a_Line2, a_Line3, a_Line4);
 }
 
@@ -790,7 +790,7 @@ void cProtocolRecognizer::SendUpdateSign(int a_BlockX, int a_BlockY, int a_Block
 
 void cProtocolRecognizer::SendUseBed(const cEntity & a_Entity, int a_BlockX, int a_BlockY, int a_BlockZ)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendUseBed(a_Entity, a_BlockX, a_BlockY, a_BlockZ);
 }
 
@@ -800,7 +800,7 @@ void cProtocolRecognizer::SendUseBed(const cEntity & a_Entity, int a_BlockX, int
 
 void cProtocolRecognizer::SendWeather(eWeather a_Weather)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendWeather(a_Weather);
 }
 
@@ -810,7 +810,7 @@ void cProtocolRecognizer::SendWeather(eWeather a_Weather)
 
 void cProtocolRecognizer::SendWholeInventory(const cWindow & a_Window)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendWholeInventory(a_Window);
 }
 
@@ -820,7 +820,7 @@ void cProtocolRecognizer::SendWholeInventory(const cWindow & a_Window)
 
 void cProtocolRecognizer::SendWindowClose(const cWindow & a_Window)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendWindowClose(a_Window);
 }
 
@@ -830,7 +830,7 @@ void cProtocolRecognizer::SendWindowClose(const cWindow & a_Window)
 
 void cProtocolRecognizer::SendWindowOpen(const cWindow & a_Window)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	m_Protocol->SendWindowOpen(a_Window);
 }
 
@@ -840,7 +840,7 @@ void cProtocolRecognizer::SendWindowOpen(const cWindow & a_Window)
 
 AString cProtocolRecognizer::GetAuthServerID(void)
 {
-	ASSERT(m_Protocol != NULL);
+	ASSERT(m_Protocol != nullptr);
 	return m_Protocol->GetAuthServerID();
 }
 
diff --git a/src/RCONServer.cpp b/src/RCONServer.cpp
index 141c67d1b..df027c91f 100644
--- a/src/RCONServer.cpp
+++ b/src/RCONServer.cpp
@@ -242,7 +242,7 @@ bool cRCONServer::cConnection::ProcessPacket(int a_RequestID, int a_PacketType,
 			if (strncmp(a_Payload, m_RCONServer.m_Password.c_str(), a_PayloadLength) != 0)
 			{
 				LOGINFO("RCON: Invalid password from client %s, dropping connection.", m_IPAddress.c_str());
-				SendResponse(-1, RCON_PACKET_RESPONSE, 0, NULL);
+				SendResponse(-1, RCON_PACKET_RESPONSE, 0, nullptr);
 				return false;
 			}
 			m_IsAuthenticated = true;
@@ -250,7 +250,7 @@ bool cRCONServer::cConnection::ProcessPacket(int a_RequestID, int a_PacketType,
 			LOGD("RCON: Client at %s has successfully authenticated", m_IPAddress.c_str());
 			
 			// Send OK response:
-			SendResponse(a_RequestID, RCON_PACKET_RESPONSE, 0, NULL);
+			SendResponse(a_RequestID, RCON_PACKET_RESPONSE, 0, nullptr);
 			return true;
 		}
 		
@@ -268,7 +268,7 @@ bool cRCONServer::cConnection::ProcessPacket(int a_RequestID, int a_PacketType,
 			cRoot::Get()->ExecuteConsoleCommand(cmd, *(new cRCONCommandOutput(*this, a_RequestID)));
 			
 			// Send an empty response:
-			SendResponse(a_RequestID, RCON_PACKET_RESPONSE, 0, NULL);
+			SendResponse(a_RequestID, RCON_PACKET_RESPONSE, 0, nullptr);
 			return true;
 		}
 	}
@@ -310,7 +310,7 @@ void cRCONServer::cConnection::IntToBuffer(int a_Value, char * a_Buffer)
 /// Sends a RCON packet back to the client
 void cRCONServer::cConnection::SendResponse(int a_RequestID, int a_PacketType, int a_PayloadLength, const char * a_Payload)
 {
-	ASSERT((a_PayloadLength == 0) || (a_Payload != NULL));  // Either zero data to send, or a valid payload ptr
+	ASSERT((a_PayloadLength == 0) || (a_Payload != nullptr));  // Either zero data to send, or a valid payload ptr
 	
 	char Buffer[4];
 	int Length = a_PayloadLength + 10;
diff --git a/src/RankManager.cpp b/src/RankManager.cpp
index f5342ed3d..3778f5d64 100644
--- a/src/RankManager.cpp
+++ b/src/RankManager.cpp
@@ -384,7 +384,7 @@ protected:
 cRankManager::cRankManager(void) :
 	m_DB("Ranks.sqlite", SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE),
 	m_IsInitialized(false),
-	m_MojangAPI(NULL)
+	m_MojangAPI(nullptr)
 {
 }
 
@@ -394,9 +394,9 @@ cRankManager::cRankManager(void) :
 
 cRankManager::~cRankManager()
 {
-	if (m_MojangAPI != NULL)
+	if (m_MojangAPI != nullptr)
 	{
-		m_MojangAPI->SetRankManager(NULL);
+		m_MojangAPI->SetRankManager(nullptr);
 	}
 }
 
diff --git a/src/RankManager.h b/src/RankManager.h
index 61c52fda6..5dff634b5 100644
--- a/src/RankManager.h
+++ b/src/RankManager.h
@@ -240,7 +240,7 @@ protected:
 	bool m_IsInitialized;
 
 	/** The MojangAPI instance that is used for translating playernames to UUIDs.
-	Set in Initialize(), may be NULL. */
+	Set in Initialize(), may be nullptr. */
 	cMojangAPI * m_MojangAPI;
 	
 	
diff --git a/src/Root.cpp b/src/Root.cpp
index 02455518c..6a91ec238 100644
--- a/src/Root.cpp
+++ b/src/Root.cpp
@@ -35,21 +35,21 @@
 
 
 
-cRoot* cRoot::s_Root = NULL;
+cRoot* cRoot::s_Root = nullptr;
 
 
 
 
 
 cRoot::cRoot(void) :
-	m_pDefaultWorld(NULL),
-	m_InputThread(NULL),
-	m_Server(NULL),
-	m_MonsterConfig(NULL),
-	m_CraftingRecipes(NULL),
-	m_FurnaceRecipe(NULL),
-	m_WebAdmin(NULL),
-	m_PluginManager(NULL),
+	m_pDefaultWorld(nullptr),
+	m_InputThread(nullptr),
+	m_Server(nullptr),
+	m_MonsterConfig(nullptr),
+	m_CraftingRecipes(nullptr),
+	m_FurnaceRecipe(nullptr),
+	m_WebAdmin(nullptr),
+	m_PluginManager(nullptr),
 	m_bStop(false),
 	m_bRestart(false)
 {
@@ -215,7 +215,7 @@ void cRoot::Start(void)
 		}
 
 		#if !defined(ANDROID_NDK)
-		delete m_InputThread; m_InputThread = NULL;
+		delete m_InputThread; m_InputThread = nullptr;
 		#endif
 
 		// Stop the server:
@@ -230,21 +230,21 @@ void cRoot::Start(void)
 		m_Authenticator.Stop();
 
 		LOGD("Freeing MonsterConfig...");
-		delete m_MonsterConfig; m_MonsterConfig = NULL;
-		delete m_WebAdmin; m_WebAdmin = NULL;
+		delete m_MonsterConfig; m_MonsterConfig = nullptr;
+		delete m_WebAdmin; m_WebAdmin = nullptr;
 		LOGD("Unloading recipes...");
-		delete m_FurnaceRecipe;   m_FurnaceRecipe = NULL;
-		delete m_CraftingRecipes; m_CraftingRecipes = NULL;
+		delete m_FurnaceRecipe;   m_FurnaceRecipe = nullptr;
+		delete m_CraftingRecipes; m_CraftingRecipes = nullptr;
 		LOGD("Unloading worlds...");
 		UnloadWorlds();
 		
 		LOGD("Stopping plugin manager...");
-		delete m_PluginManager; m_PluginManager = NULL;
+		delete m_PluginManager; m_PluginManager = nullptr;
 
 		cItemHandler::Deinit();
 
 		LOG("Cleaning up...");
-		delete m_Server; m_Server = NULL;
+		delete m_Server; m_Server = nullptr;
 		LOG("Shutdown successful!");
 	}
 	
@@ -319,7 +319,7 @@ void cRoot::LoadWorlds(cIniFile & IniFile)
 cWorld * cRoot::CreateAndInitializeWorld(const AString & a_WorldName, eDimension a_Dimension, const AString & a_OverworldName)
 {
 	cWorld * World = m_WorldsByName[a_WorldName];
-	if (World != NULL)
+	if (World != nullptr)
 	{
 		return World;
 	}
@@ -364,7 +364,7 @@ void cRoot::StopWorlds(void)
 
 void cRoot::UnloadWorlds(void)
 {
-	m_pDefaultWorld = NULL;
+	m_pDefaultWorld = nullptr;
 	for (WorldMap::iterator itr = m_WorldsByName.begin(); itr != m_WorldsByName.end(); ++itr)
 	{
 		delete itr->second;
@@ -397,7 +397,7 @@ cWorld * cRoot::GetWorld(const AString & a_WorldName, bool a_SearchForFolder)
 	{
 		return CreateAndInitializeWorld(a_WorldName);
 	}
-	return NULL;
+	return nullptr;
 }
 
 
@@ -409,7 +409,7 @@ bool cRoot::ForEachWorld(cWorldListCallback & a_Callback)
 	for (WorldMap::iterator itr = m_WorldsByName.begin(), itr2 = itr; itr != m_WorldsByName.end(); itr = itr2)
 	{
 		++itr2;
-		if (itr->second != NULL)
+		if (itr->second != nullptr)
 		{
 			if (a_Callback.Item(itr->second))
 			{
@@ -544,7 +544,7 @@ void cRoot::BroadcastChat(const AString & a_Message, eMessageType a_ChatPrefix)
 {
 	for (WorldMap::iterator itr = m_WorldsByName.begin(), end = m_WorldsByName.end(); itr != end; ++itr)
 	{
-		itr->second->BroadcastChat(a_Message, NULL, a_ChatPrefix);
+		itr->second->BroadcastChat(a_Message, nullptr, a_ChatPrefix);
 	}  // for itr - m_WorldsByName[]
 }
 
@@ -614,7 +614,7 @@ bool cRoot::FindAndDoWithPlayer(const AString & a_PlayerName, cPlayerListCallbac
 			m_BestRating(0),
 			m_NameLength(a_PlayerName.length()),
 			m_PlayerName(a_PlayerName),
-			m_BestMatch(NULL),
+			m_BestMatch(nullptr),
 			m_NumMatches(0)
 		{}
 
diff --git a/src/Scoreboard.cpp b/src/Scoreboard.cpp
index def952029..adce8b549 100644
--- a/src/Scoreboard.cpp
+++ b/src/Scoreboard.cpp
@@ -278,7 +278,7 @@ cScoreboard::cScoreboard(cWorld * a_World) : m_World(a_World)
 {
 	for (int i = 0; i < (int) dsCount; ++i)
 	{
-		m_Display[i] = NULL;
+		m_Display[i] = nullptr;
 	}
 }
 
@@ -294,14 +294,14 @@ cObjective* cScoreboard::RegisterObjective(const AString & a_Name, const AString
 
 	if (Status.second)
 	{
-		ASSERT(m_World != NULL);
+		ASSERT(m_World != nullptr);
 		m_World->BroadcastScoreboardObjective(a_Name, a_DisplayName, 0);
 
 		return &Status.first->second;
 	}
 	else
 	{
-		return NULL;
+		return nullptr;
 	}
 }
 
@@ -320,14 +320,14 @@ bool cScoreboard::RemoveObjective(const AString & a_Name)
 		return false;
 	}
 
-	ASSERT(m_World != NULL);
+	ASSERT(m_World != nullptr);
 	m_World->BroadcastScoreboardObjective(it->second.GetName(), it->second.GetDisplayName(), 1);
 
 	for (unsigned int i = 0; i < (unsigned int) dsCount; ++i)
 	{
 		if (m_Display[i] == &it->second)
 		{
-			SetDisplay(NULL, (eDisplaySlot) i);
+			SetDisplay(nullptr, (eDisplaySlot) i);
 		}
 	}
 
@@ -348,7 +348,7 @@ cObjective * cScoreboard::GetObjective(const AString & a_Name)
 
 	if (it == m_Objectives.end())
 	{
-		return NULL;
+		return nullptr;
 	}
 	else
 	{
@@ -369,7 +369,7 @@ cTeam * cScoreboard::RegisterTeam(
 
 	std::pair<cTeamMap::iterator, bool> Status = m_Teams.insert(cNamedTeam(a_Name, Team));
 
-	return Status.second ? &Status.first->second : NULL;
+	return Status.second ? &Status.first->second : nullptr;
 }
 
 
@@ -404,7 +404,7 @@ cTeam * cScoreboard::GetTeam(const AString & a_Name)
 
 	if (it == m_Teams.end())
 	{
-		return NULL;
+		return nullptr;
 	}
 	else
 	{
@@ -428,7 +428,7 @@ cTeam * cScoreboard::QueryPlayerTeam(const AString & a_Name)
 		}
 	}
 
-	return NULL;
+	return nullptr;
 }
 
 
@@ -452,7 +452,7 @@ void cScoreboard::SetDisplay(cObjective * a_Objective, eDisplaySlot a_Slot)
 {
 	m_Display[a_Slot] = a_Objective;
 
-	ASSERT(m_World != NULL);
+	ASSERT(m_World != nullptr);
 	m_World->BroadcastDisplayObjective(a_Objective ? a_Objective->GetName() : "", a_Slot);
 }
 
diff --git a/src/Scoreboard.h b/src/Scoreboard.h
index f53b8c803..dd4073c89 100644
--- a/src/Scoreboard.h
+++ b/src/Scoreboard.h
@@ -226,22 +226,22 @@ public:
 
 	// tolua_begin
 
-	/** Registers a new scoreboard objective, returns the cObjective instance, NULL on name collision */
+	/** Registers a new scoreboard objective, returns the cObjective instance, nullptr on name collision */
 	cObjective * RegisterObjective(const AString & a_Name, const AString & a_DisplayName, cObjective::eType a_Type);
 
 	/** Removes a registered objective, returns true if operation was successful */
 	bool RemoveObjective(const AString & a_Name);
 
-	/** Retrieves the objective with the specified name, NULL if not found */
+	/** Retrieves the objective with the specified name, nullptr if not found */
 	cObjective * GetObjective(const AString & a_Name);
 
-	/** Registers a new team, returns the cTeam instance, NULL on name collision */
+	/** Registers a new team, returns the cTeam instance, nullptr on name collision */
 	cTeam * RegisterTeam(const AString & a_Name, const AString & a_DisplayName, const AString & a_Prefix, const AString & a_Suffix);
 
 	/** Removes a registered team, returns true if operation was successful */
 	bool RemoveTeam(const AString & a_Name);
 
-	/** Retrieves the team with the specified name, NULL if not found */
+	/** Retrieves the team with the specified name, nullptr if not found */
 	cTeam * GetTeam(const AString & a_Name);
 
 	void SetDisplay(const AString & a_Objective, eDisplaySlot a_Slot);
diff --git a/src/Server.cpp b/src/Server.cpp
index db3ab2ed4..5085d4c94 100644
--- a/src/Server.cpp
+++ b/src/Server.cpp
@@ -338,7 +338,7 @@ void cServer::OnConnectionAccepted(cSocket & a_Socket)
 		LOGERROR("Client \"%s\" cannot be handled, server probably unstable", ClientIP.c_str());
 		a_Socket.CloseSocket();
 		delete NewHandle;
-		NewHandle = NULL;
+		NewHandle = nullptr;
 		return;
 	}
 	
@@ -637,17 +637,17 @@ void cServer::PrintHelp(const AStringVector & a_Split, cCommandOutputCallback &
 void cServer::BindBuiltInConsoleCommands(void)
 {
 	cPluginManager * PlgMgr = cPluginManager::Get();
-	PlgMgr->BindConsoleCommand("help", NULL, " - Shows the available commands");
-	PlgMgr->BindConsoleCommand("reload", NULL, " - Reloads all plugins");
-	PlgMgr->BindConsoleCommand("restart", NULL, " - Restarts the server cleanly");
-	PlgMgr->BindConsoleCommand("stop", NULL, " - Stops the server cleanly");
-	PlgMgr->BindConsoleCommand("chunkstats", NULL, " - Displays detailed chunk memory statistics");
-	PlgMgr->BindConsoleCommand("load <pluginname>", NULL, " - Adds and enables the specified plugin");
-	PlgMgr->BindConsoleCommand("unload <pluginname>", NULL, " - Disables the specified plugin");
-	PlgMgr->BindConsoleCommand("destroyentities", NULL, " - Destroys all entities in all worlds");
+	PlgMgr->BindConsoleCommand("help", nullptr, " - Shows the available commands");
+	PlgMgr->BindConsoleCommand("reload", nullptr, " - Reloads all plugins");
+	PlgMgr->BindConsoleCommand("restart", nullptr, " - Restarts the server cleanly");
+	PlgMgr->BindConsoleCommand("stop", nullptr, " - Stops the server cleanly");
+	PlgMgr->BindConsoleCommand("chunkstats", nullptr, " - Displays detailed chunk memory statistics");
+	PlgMgr->BindConsoleCommand("load <pluginname>", nullptr, " - Adds and enables the specified plugin");
+	PlgMgr->BindConsoleCommand("unload <pluginname>", nullptr, " - Disables the specified plugin");
+	PlgMgr->BindConsoleCommand("destroyentities", nullptr, " - Destroys all entities in all worlds");
 
 	#if defined(_MSC_VER) && defined(_DEBUG) && defined(ENABLE_LEAK_FINDER)
-	PlgMgr->BindConsoleCommand("dumpmem", NULL, " - Dumps all used memory blocks together with their callstacks into memdump.xml");
+	PlgMgr->BindConsoleCommand("dumpmem", nullptr, " - Dumps all used memory blocks together with their callstacks into memdump.xml");
 	#endif
 }
 
@@ -716,7 +716,7 @@ void cServer::AuthenticateUser(int a_ClientID, const AString & a_Name, const ASt
 
 cServer::cNotifyWriteThread::cNotifyWriteThread(void) :
 	super("ClientPacketThread"),
-	m_Server(NULL)
+	m_Server(nullptr)
 {
 }
 
diff --git a/src/SetChunkData.cpp b/src/SetChunkData.cpp
index 707dfb9e8..e335176a8 100644
--- a/src/SetChunkData.cpp
+++ b/src/SetChunkData.cpp
@@ -42,15 +42,15 @@ cSetChunkData::cSetChunkData(
 	m_ShouldMarkDirty(a_ShouldMarkDirty)
 {
 	// Check the params' validity:
-	ASSERT(a_BlockTypes != NULL);
-	ASSERT(a_BlockMetas != NULL);
+	ASSERT(a_BlockTypes != nullptr);
+	ASSERT(a_BlockMetas != nullptr);
 
 	// Copy block types and metas:
 	memcpy(m_BlockTypes, a_BlockTypes, sizeof(cChunkDef::BlockTypes));
 	memcpy(m_BlockMetas, a_BlockMetas, sizeof(cChunkDef::BlockNibbles));
 	
 	// Copy lights, if both given:
-	if ((a_BlockLight != NULL) && (a_SkyLight != NULL))
+	if ((a_BlockLight != nullptr) && (a_SkyLight != nullptr))
 	{
 		memcpy(m_BlockLight, a_BlockLight, sizeof(m_BlockLight));
 		memcpy(m_SkyLight,   a_SkyLight,   sizeof(m_SkyLight));
@@ -62,7 +62,7 @@ cSetChunkData::cSetChunkData(
 	}
 	
 	// Copy the heightmap, if available:
-	if (a_HeightMap != NULL)
+	if (a_HeightMap != nullptr)
 	{
 		memcpy(m_HeightMap, a_HeightMap, sizeof(m_HeightMap));
 		m_IsHeightMapValid = true;
@@ -73,7 +73,7 @@ cSetChunkData::cSetChunkData(
 	}
 	
 	// Copy biomes, if available:
-	if (a_Biomes != NULL)
+	if (a_Biomes != nullptr)
 	{
 		memcpy(m_Biomes, a_Biomes, sizeof(m_Biomes));
 		m_AreBiomesValid = true;
diff --git a/src/SetChunkData.h b/src/SetChunkData.h
index 03e9ef4d9..1eeb75ca9 100644
--- a/src/SetChunkData.h
+++ b/src/SetChunkData.h
@@ -27,7 +27,7 @@ public:
 	Will move the entity and blockentity lists into the internal storage, and empty the a_Entities and
 	a_BlockEntities lists.
 	a_BlockTypes and a_BlockMetas must always be valid.
-	If either of the light arrays are NULL, the chunk data will be marked as not having any light at all and
+	If either of the light arrays are nullptr, the chunk data will be marked as not having any light at all and
 	will be scheduled for re-lighting once it is set into the chunkmap.
 	If a_Biomes is not valid, the internal flag is set and the world will calculate the biomes using the chunk
 	generator when setting the chunk data.
diff --git a/src/Simulator/DelayedFluidSimulator.cpp b/src/Simulator/DelayedFluidSimulator.cpp
index 59ea51aa0..dc8dffe2d 100644
--- a/src/Simulator/DelayedFluidSimulator.cpp
+++ b/src/Simulator/DelayedFluidSimulator.cpp
@@ -55,7 +55,7 @@ cDelayedFluidSimulatorChunkData::cDelayedFluidSimulatorChunkData(int a_TickDelay
 cDelayedFluidSimulatorChunkData::~cDelayedFluidSimulatorChunkData()
 {
 	delete[] m_Slots;
-	m_Slots = NULL;
+	m_Slots = nullptr;
 }
 
 
@@ -86,7 +86,7 @@ void cDelayedFluidSimulator::AddBlock(int a_BlockX, int a_BlockY, int a_BlockZ,
 		return;
 	}
 	
-	if ((a_Chunk == NULL) || !a_Chunk->IsValid())
+	if ((a_Chunk == nullptr) || !a_Chunk->IsValid())
 	{
 		return;
 	}
diff --git a/src/Simulator/FireSimulator.cpp b/src/Simulator/FireSimulator.cpp
index d3deee74a..75ebefcf7 100644
--- a/src/Simulator/FireSimulator.cpp
+++ b/src/Simulator/FireSimulator.cpp
@@ -220,7 +220,7 @@ bool cFireSimulator::DoesBurnForever(BLOCKTYPE a_BlockType)
 
 void cFireSimulator::AddBlock(int a_BlockX, int a_BlockY, int a_BlockZ, cChunk * a_Chunk)
 {
-	if ((a_Chunk == NULL) || !a_Chunk->IsValid())
+	if ((a_Chunk == nullptr) || !a_Chunk->IsValid())
 	{
 		return;
 	}
@@ -359,7 +359,7 @@ void cFireSimulator::RemoveFuelNeighbors(cChunk * a_Chunk, int a_RelX, int a_Rel
 		int Z = a_RelZ + gNeighborCoords[i].z;
 
 		cChunkPtr Neighbour = a_Chunk->GetRelNeighborChunkAdjustCoords(X, Z);
-		if (Neighbour == NULL)
+		if (Neighbour == nullptr)
 		{
 			continue;
 		}
diff --git a/src/Simulator/FloodyFluidSimulator.cpp b/src/Simulator/FloodyFluidSimulator.cpp
index b839aa746..e95ef216d 100644
--- a/src/Simulator/FloodyFluidSimulator.cpp
+++ b/src/Simulator/FloodyFluidSimulator.cpp
@@ -220,7 +220,7 @@ void cFloodyFluidSimulator::SpreadToNeighbor(cChunk * a_NearChunk, int a_RelX, i
 	ASSERT(a_NewMeta > 0);  // Source blocks aren't spread
 
 	a_NearChunk = a_NearChunk->GetRelNeighborChunkAdjustCoords(a_RelX, a_RelZ);
-	if ((a_NearChunk == NULL) || (!a_NearChunk->IsValid()))
+	if ((a_NearChunk == nullptr) || (!a_NearChunk->IsValid()))
 	{
 		// Chunk not available
 		return;
@@ -297,7 +297,7 @@ void cFloodyFluidSimulator::SpreadToNeighbor(cChunk * a_NearChunk, int a_RelX, i
 				ChunkInterface,
 				m_World,
 				PluginInterface,
-				NULL,
+				nullptr,
 				BlockX,
 				a_RelY,
 				BlockZ
diff --git a/src/Simulator/FluidSimulator.cpp b/src/Simulator/FluidSimulator.cpp
index 58501326f..9c8453d04 100644
--- a/src/Simulator/FluidSimulator.cpp
+++ b/src/Simulator/FluidSimulator.cpp
@@ -178,7 +178,7 @@ Direction cFluidSimulator::GetFlowingDirection(int a_X, int a_Y, int a_Z, bool a
 		
 		}
 		delete Pos;
-		Pos = NULL;
+		Pos = nullptr;
 	}
 
 	if (LowestPoint == m_World.GetBlockMeta(a_X, a_Y, a_Z))
diff --git a/src/Simulator/FluidSimulator.h b/src/Simulator/FluidSimulator.h
index 0877a7bf1..d65a8e78b 100644
--- a/src/Simulator/FluidSimulator.h
+++ b/src/Simulator/FluidSimulator.h
@@ -51,7 +51,7 @@ public:
 	virtual Direction GetFlowingDirection(int a_X, int a_Y, int a_Z, bool a_Over = true);
 	
 	/// Creates a ChunkData object for the simulator to use. The simulator returns the correct object type.
-	virtual cFluidSimulatorData * CreateChunkData(void) { return NULL; }
+	virtual cFluidSimulatorData * CreateChunkData(void) { return nullptr; }
 	
 	bool IsFluidBlock          (BLOCKTYPE a_BlockType) const { return (a_BlockType == m_FluidBlock); }
 	bool IsStationaryFluidBlock(BLOCKTYPE a_BlockType) const { return (a_BlockType == m_StationaryFluidBlock); }
diff --git a/src/Simulator/NoopRedstoneSimulator.h b/src/Simulator/NoopRedstoneSimulator.h
index 7c961f32b..832b26dfc 100644
--- a/src/Simulator/NoopRedstoneSimulator.h
+++ b/src/Simulator/NoopRedstoneSimulator.h
@@ -39,7 +39,7 @@ public:
 	
 	virtual cRedstoneSimulatorChunkData * CreateChunkData() override
 	{
-		return NULL;
+		return nullptr;
 	}
 
 } ;
diff --git a/src/Simulator/SandSimulator.cpp b/src/Simulator/SandSimulator.cpp
index aad41e463..073518b31 100644
--- a/src/Simulator/SandSimulator.cpp
+++ b/src/Simulator/SandSimulator.cpp
@@ -94,7 +94,7 @@ bool cSandSimulator::IsAllowedBlock(BLOCKTYPE a_BlockType)
 
 void cSandSimulator::AddBlock(int a_BlockX, int a_BlockY, int a_BlockZ, cChunk * a_Chunk)
 {
-	if ((a_Chunk == NULL) || !a_Chunk->IsValid())
+	if ((a_Chunk == nullptr) || !a_Chunk->IsValid())
 	{
 		return;
 	}
diff --git a/src/Simulator/VaporizeFluidSimulator.cpp b/src/Simulator/VaporizeFluidSimulator.cpp
index 484cac334..119742346 100644
--- a/src/Simulator/VaporizeFluidSimulator.cpp
+++ b/src/Simulator/VaporizeFluidSimulator.cpp
@@ -22,7 +22,7 @@ cVaporizeFluidSimulator::cVaporizeFluidSimulator(cWorld & a_World, BLOCKTYPE a_F
 
 void cVaporizeFluidSimulator::AddBlock(int a_BlockX, int a_BlockY, int a_BlockZ, cChunk * a_Chunk)
 {
-	if (a_Chunk == NULL)
+	if (a_Chunk == nullptr)
 	{
 		return;
 	}
diff --git a/src/StackWalker.h b/src/StackWalker.h
index bf47d3726..a609f6840 100644
--- a/src/StackWalker.h
+++ b/src/StackWalker.h
@@ -88,7 +88,7 @@ public:
 
   StackWalker(
     int options = OptionsAll, // 'int' is by design, to combine the enum-flags
-    LPCSTR szSymPath = NULL, 
+    LPCSTR szSymPath = nullptr, 
     DWORD dwProcessId = GetCurrentProcessId(), 
     HANDLE hProcess = GetCurrentProcess()
     );
@@ -108,9 +108,9 @@ public:
 
   BOOL ShowCallstack(
     HANDLE hThread = GetCurrentThread(), 
-    const CONTEXT *context = NULL, 
-    PReadProcessMemoryRoutine readMemoryFunction = NULL,
-    LPVOID pUserData = NULL  // optional to identify some data in the 'readMemoryFunction'-callback
+    const CONTEXT *context = nullptr, 
+    PReadProcessMemoryRoutine readMemoryFunction = nullptr,
+    LPVOID pUserData = nullptr  // optional to identify some data in the 'readMemoryFunction'-callback
     );
 
 #if _MSC_VER >= 1300
@@ -180,11 +180,11 @@ protected:
 #define GET_CURRENT_CONTEXT(c, contextFlags) \
   do { \
     memset(&c, 0, sizeof(CONTEXT)); \
-    EXCEPTION_POINTERS *pExp = NULL; \
+    EXCEPTION_POINTERS *pExp = nullptr; \
     __try { \
       throw 0; \
     } __except( ( (pExp = GetExceptionInformation()) ? EXCEPTION_EXECUTE_HANDLER : EXCEPTION_EXECUTE_HANDLER)) {} \
-    if (pExp != NULL) \
+    if (pExp != nullptr) \
       memcpy(&c, pExp->ContextRecord, sizeof(CONTEXT)); \
       c.ContextFlags = contextFlags; \
   } while(0);
diff --git a/src/StringUtils.cpp b/src/StringUtils.cpp
index 21962f832..34f2da682 100644
--- a/src/StringUtils.cpp
+++ b/src/StringUtils.cpp
@@ -20,7 +20,7 @@
 
 AString & AppendVPrintf(AString & str, const char * format, va_list args)
 {
-	ASSERT(format != NULL);
+	ASSERT(format != nullptr);
 	
 	char buffer[2048];
 	size_t len;
@@ -562,7 +562,7 @@ AString & CreateHexDump(AString & a_Out, const void * a_Data, size_t a_Size, siz
 		#else
 		int Count = sprintf(line, "%08x:", (unsigned)i);
 		#endif
-		// Remove the terminating NULL / leftover garbage in line, after the sprintf-ed value
+		// Remove the terminating nullptr / leftover garbage in line, after the sprintf-ed value
 		memset(line + Count, 32, sizeof(line) - Count);
 		p = line + 10;
 		q = p + 2 + a_BytesPerLine * 3 + 1;
diff --git a/src/UI/SlotArea.cpp b/src/UI/SlotArea.cpp
index 88d9f44fc..9113ec343 100644
--- a/src/UI/SlotArea.cpp
+++ b/src/UI/SlotArea.cpp
@@ -48,9 +48,9 @@ void cSlotArea::Clicked(cPlayer & a_Player, int a_SlotNum, eClickAction a_ClickA
 	ASSERT((a_SlotNum >= 0) && (a_SlotNum < GetNumSlots()));
 
 	bool bAsync = false;
-	if (GetSlot(a_SlotNum, a_Player) == NULL)
+	if (GetSlot(a_SlotNum, a_Player) == nullptr)
 	{
-		LOGWARNING("GetSlot(%d) returned NULL! Ignoring click", a_SlotNum);
+		LOGWARNING("GetSlot(%d) returned nullptr! Ignoring click", a_SlotNum);
 		return;
 	}
 	
@@ -791,9 +791,9 @@ void cSlotAreaAnvil::Clicked(cPlayer & a_Player, int a_SlotNum, eClickAction a_C
 	}
 
 	bool bAsync = false;
-	if (GetSlot(a_SlotNum, a_Player) == NULL)
+	if (GetSlot(a_SlotNum, a_Player) == nullptr)
 	{
-		LOGWARNING("GetSlot(%d) returned NULL! Ignoring click", a_SlotNum);
+		LOGWARNING("GetSlot(%d) returned nullptr! Ignoring click", a_SlotNum);
 		return;
 	}
 
@@ -980,7 +980,7 @@ void cSlotAreaAnvil::OnTakeResult(cPlayer & a_Player)
 	m_ParentWindow.SetProperty(0, m_MaximumCost, a_Player);
 
 	m_MaximumCost = 0;
-	((cAnvilWindow*)&m_ParentWindow)->SetRepairedItemName("", NULL);
+	((cAnvilWindow*)&m_ParentWindow)->SetRepairedItemName("", nullptr);
 
 	int PosX, PosY, PosZ;
 	((cAnvilWindow*)&m_ParentWindow)->GetBlockPos(PosX, PosY, PosZ);
@@ -1238,9 +1238,9 @@ void cSlotAreaBeacon::Clicked(cPlayer & a_Player, int a_SlotNum, eClickAction a_
 	ASSERT((a_SlotNum >= 0) && (a_SlotNum < GetNumSlots()));
 
 	bool bAsync = false;
-	if (GetSlot(a_SlotNum, a_Player) == NULL)
+	if (GetSlot(a_SlotNum, a_Player) == nullptr)
 	{
-		LOGWARNING("GetSlot(%d) returned NULL! Ignoring click", a_SlotNum);
+		LOGWARNING("GetSlot(%d) returned nullptr! Ignoring click", a_SlotNum);
 		return;
 	}
 
@@ -1408,9 +1408,9 @@ void cSlotAreaEnchanting::Clicked(cPlayer & a_Player, int a_SlotNum, eClickActio
 	ASSERT((a_SlotNum >= 0) && (a_SlotNum < GetNumSlots()));
 
 	bool bAsync = false;
-	if (GetSlot(a_SlotNum, a_Player) == NULL)
+	if (GetSlot(a_SlotNum, a_Player) == nullptr)
 	{
-		LOGWARNING("GetSlot(%d) returned NULL! Ignoring click", a_SlotNum);
+		LOGWARNING("GetSlot(%d) returned nullptr! Ignoring click", a_SlotNum);
 		return;
 	}
 
@@ -1709,19 +1709,19 @@ cSlotAreaFurnace::~cSlotAreaFurnace()
 
 void cSlotAreaFurnace::Clicked(cPlayer & a_Player, int a_SlotNum, eClickAction a_ClickAction, const cItem & a_ClickedItem)
 {
-	if (m_Furnace == NULL)
+	if (m_Furnace == nullptr)
 	{
-		LOGERROR("cSlotAreaFurnace::Clicked(): m_Furnace == NULL");
-		ASSERT(!"cSlotAreaFurnace::Clicked(): m_Furnace == NULL");
+		LOGERROR("cSlotAreaFurnace::Clicked(): m_Furnace == nullptr");
+		ASSERT(!"cSlotAreaFurnace::Clicked(): m_Furnace == nullptr");
 		return;
 	}
 
 	if (a_SlotNum == 2)
 	{
 		bool bAsync = false;
-		if (GetSlot(a_SlotNum, a_Player) == NULL)
+		if (GetSlot(a_SlotNum, a_Player) == nullptr)
 		{
-			LOGWARNING("GetSlot(%d) returned NULL! Ignoring click", a_SlotNum);
+			LOGWARNING("GetSlot(%d) returned nullptr! Ignoring click", a_SlotNum);
 			return;
 		}
 
@@ -2071,9 +2071,9 @@ void cSlotAreaArmor::Clicked(cPlayer & a_Player, int a_SlotNum, eClickAction a_C
 	}
 
 	bool bAsync = false;
-	if (GetSlot(a_SlotNum, a_Player) == NULL)
+	if (GetSlot(a_SlotNum, a_Player) == nullptr)
 	{
-		LOGWARNING("GetSlot(%d) returned NULL! Ignoring click", a_SlotNum);
+		LOGWARNING("GetSlot(%d) returned nullptr! Ignoring click", a_SlotNum);
 		return;
 	}
 
@@ -2223,15 +2223,15 @@ const cItem * cSlotAreaTemporary::GetSlot(int a_SlotNum, cPlayer & a_Player) con
 		LOGERROR("cSlotAreaTemporary: player \"%s\" not found for slot %d!", a_Player.GetName().c_str(), a_SlotNum);
 		ASSERT(!"cSlotAreaTemporary: player not found!");
 		
-		// Player not found, this should not happen, ever! Return NULL, but things may break by this.
-		return NULL;
+		// Player not found, this should not happen, ever! Return nullptr, but things may break by this.
+		return nullptr;
 	}
 	
 	if (a_SlotNum >= (int)(itr->second.size()))
 	{
 		LOGERROR("cSlotAreaTemporary: asking for more slots than actually stored!");
 		ASSERT(!"cSlotAreaTemporary: asking for more slots than actually stored!");
-		return NULL;
+		return nullptr;
 	}
 	
 	return &(itr->second[a_SlotNum]);
@@ -2320,7 +2320,7 @@ cItem * cSlotAreaTemporary::GetPlayerSlots(cPlayer & a_Player)
 	cItemMap::iterator itr = m_Items.find(a_Player.GetUniqueID());
 	if (itr == m_Items.end())
 	{
-		return NULL;
+		return nullptr;
 	}
 	return &(itr->second[0]);
 }
diff --git a/src/UI/Window.cpp b/src/UI/Window.cpp
index 802d0d219..1598dd3e7 100644
--- a/src/UI/Window.cpp
+++ b/src/UI/Window.cpp
@@ -33,7 +33,7 @@ cWindow::cWindow(WindowType a_WindowType, const AString & a_WindowTitle) :
 	m_WindowTitle(a_WindowTitle),
 	m_IsDestroyed(false),
 	m_ShouldDistributeToHotbarFirst(true),
-	m_Owner(NULL)
+	m_Owner(nullptr)
 {
 	if (a_WindowType == wtInventory)
 	{
@@ -105,10 +105,10 @@ const cItem * cWindow::GetSlot(cPlayer & a_Player, int a_SlotNum) const
 	// Return the item at the specified slot for the specified player
 	int LocalSlotNum = 0;
 	const cSlotArea * Area = GetSlotArea(a_SlotNum, LocalSlotNum);
-	if (Area == NULL)
+	if (Area == nullptr)
 	{
-		LOGWARNING("%s: requesting item from an invalid SlotArea (SlotNum %d), returning NULL.", __FUNCTION__, a_SlotNum);
-		return NULL;
+		LOGWARNING("%s: requesting item from an invalid SlotArea (SlotNum %d), returning nullptr.", __FUNCTION__, a_SlotNum);
+		return nullptr;
 	}
 	return Area->GetSlot(LocalSlotNum, a_Player);
 }
@@ -122,7 +122,7 @@ void cWindow::SetSlot(cPlayer & a_Player, int a_SlotNum, const cItem & a_Item)
 	// Set the item to the specified slot for the specified player
 	int LocalSlotNum = 0;
 	cSlotArea * Area = GetSlotArea(a_SlotNum, LocalSlotNum);
-	if (Area == NULL)
+	if (Area == nullptr)
 	{
 		LOGWARNING("%s: requesting write to an invalid SlotArea (SlotNum %d), ignoring.", __FUNCTION__, a_SlotNum);
 		return;
@@ -177,7 +177,7 @@ void cWindow::GetSlots(cPlayer & a_Player, cItems & a_Slots) const
 		for (int i = 0; i < NumSlots; i++)
 		{
 			const cItem * Item = (*itr)->GetSlot(i, a_Player);
-			if (Item == NULL)
+			if (Item == nullptr)
 			{
 				a_Slots.push_back(cItem());
 			}
@@ -311,7 +311,7 @@ bool cWindow::ClosedByPlayer(cPlayer & a_Player, bool a_CanRefuse)
 	}
 
 	cClientHandle * ClientHandle = a_Player.GetClientHandle();
-	if (ClientHandle != NULL)
+	if (ClientHandle != nullptr)
 	{
 		ClientHandle->SendWindowClose(*this);
 	}
@@ -345,7 +345,7 @@ bool cWindow::ClosedByPlayer(cPlayer & a_Player, bool a_CanRefuse)
 
 void cWindow::OwnerDestroyed()
 {
-	m_Owner = NULL;
+	m_Owner = nullptr;
 	// Close window for each player. Note that the last one needs special handling
 	while (m_OpenedBy.size() > 1)
 	{
@@ -511,10 +511,10 @@ void cWindow::SendSlot(cPlayer & a_Player, cSlotArea * a_SlotArea, int a_Relativ
 
 void cWindow::Destroy(void)
 {
-	if (m_Owner != NULL)
+	if (m_Owner != nullptr)
 	{
 		m_Owner->CloseWindow();
-		m_Owner = NULL;
+		m_Owner = nullptr;
 	}
 	m_IsDestroyed = true;
 }
@@ -529,7 +529,7 @@ cSlotArea * cWindow::GetSlotArea(int a_GlobalSlotNum, int & a_LocalSlotNum)
 	{
 		LOGWARNING("%s: requesting an invalid SlotNum: %d out of %d slots", __FUNCTION__, a_GlobalSlotNum, GetNumSlots() - 1);
 		ASSERT(!"Invalid SlotNum");
-		return NULL;
+		return nullptr;
 	}
 	
 	// Iterate through all the SlotAreas, find the correct one
@@ -547,7 +547,7 @@ cSlotArea * cWindow::GetSlotArea(int a_GlobalSlotNum, int & a_LocalSlotNum)
 	// We shouldn't be here - the check at the beginnning should prevent this. Log and assert
 	LOGWARNING("%s: GetNumSlots() is out of sync: %d; LocalSlotNum = %d", __FUNCTION__, GetNumSlots(), LocalSlotNum);
 	ASSERT(!"Invalid GetNumSlots");
-	return NULL;
+	return nullptr;
 }
 
 
@@ -560,7 +560,7 @@ const cSlotArea * cWindow::GetSlotArea(int a_GlobalSlotNum, int & a_LocalSlotNum
 	{
 		LOGWARNING("%s: requesting an invalid SlotNum: %d out of %d slots", __FUNCTION__, a_GlobalSlotNum, GetNumSlots() - 1);
 		ASSERT(!"Invalid SlotNum");
-		return NULL;
+		return nullptr;
 	}
 	
 	// Iterate through all the SlotAreas, find the correct one
@@ -578,7 +578,7 @@ const cSlotArea * cWindow::GetSlotArea(int a_GlobalSlotNum, int & a_LocalSlotNum
 	// We shouldn't be here - the check at the beginnning should prevent this. Log and assert
 	LOGWARNING("%s: GetNumSlots() is out of sync: %d; LocalSlotNum = %d", __FUNCTION__, GetNumSlots(), LocalSlotNum);
 	ASSERT(!"Invalid GetNumSlots");
-	return NULL;
+	return nullptr;
 }
 
 
@@ -669,7 +669,7 @@ int cWindow::DistributeItemToSlots(cPlayer & a_Player, const cItem & a_Item, int
 	{
 		int LocalSlotNum = 0;
 		cSlotArea * Area = GetSlotArea(*itr, LocalSlotNum);
-		if (Area == NULL)
+		if (Area == nullptr)
 		{
 			LOGWARNING("%s: Bad SlotArea for slot %d", __FUNCTION__, *itr);
 			continue;
@@ -836,7 +836,7 @@ void cAnvilWindow::SetRepairedItemName(const AString & a_Name, cPlayer * a_Playe
 {
 	m_RepairedItemName = a_Name;
 
-	if (a_Player != NULL)
+	if (a_Player != nullptr)
 	{
 		m_AnvilSlotArea->UpdateResult(*a_Player);
 	}
@@ -963,7 +963,7 @@ cChestWindow::cChestWindow(cChestEntity * a_Chest) :
 	m_BlockY(a_Chest->GetPosY()),
 	m_BlockZ(a_Chest->GetPosZ()),
 	m_PrimaryChest(a_Chest),
-	m_SecondaryChest(NULL)
+	m_SecondaryChest(nullptr)
 {
 	m_SlotAreas.push_back(new cSlotAreaChest(a_Chest, *this));
 	m_SlotAreas.push_back(new cSlotAreaInventory(*this));
@@ -1014,7 +1014,7 @@ void cChestWindow::OpenedByPlayer(cPlayer & a_Player)
 	cChunkDef::BlockToChunk(m_PrimaryChest->GetPosX(), m_PrimaryChest->GetPosZ(), ChunkX, ChunkZ);
 	m_PrimaryChest->GetWorld()->MarkRedstoneDirty(ChunkX, ChunkZ);
 
-	if (m_SecondaryChest != NULL)
+	if (m_SecondaryChest != nullptr)
 	{
 		m_SecondaryChest->SetNumberOfPlayers(m_SecondaryChest->GetNumberOfPlayers() + 1);
 		cChunkDef::BlockToChunk(m_SecondaryChest->GetPosX(), m_SecondaryChest->GetPosZ(), ChunkX, ChunkZ);
@@ -1036,7 +1036,7 @@ bool cChestWindow::ClosedByPlayer(cPlayer & a_Player, bool a_CanRefuse)
 	cChunkDef::BlockToChunk(m_PrimaryChest->GetPosX(), m_PrimaryChest->GetPosZ(), ChunkX, ChunkZ);
 	m_PrimaryChest->GetWorld()->MarkRedstoneDirty(ChunkX, ChunkZ);
 
-	if (m_SecondaryChest != NULL)
+	if (m_SecondaryChest != nullptr)
 	{
 		m_SecondaryChest->SetNumberOfPlayers(m_SecondaryChest->GetNumberOfPlayers() - 1);
 		cChunkDef::BlockToChunk(m_SecondaryChest->GetPosX(), m_SecondaryChest->GetPosZ(), ChunkX, ChunkZ);
diff --git a/src/UI/Window.h b/src/UI/Window.h
index 26dd7f125..e62176d50 100644
--- a/src/UI/Window.h
+++ b/src/UI/Window.h
@@ -90,7 +90,7 @@ public:
 	
 	// tolua_begin
 	
-	/// Returns the item at the specified slot for the specified player. Returns NULL if invalid SlotNum requested
+	/// Returns the item at the specified slot for the specified player. Returns nullptr if invalid SlotNum requested
 	const cItem * GetSlot(cPlayer & a_Player, int a_SlotNum) const;
 	
 	/// Sets the item to the specified slot for the specified player
@@ -189,13 +189,13 @@ protected:
 	
 	/** Returns the correct slot area for the specified window-global SlotNum
 	Also returns the area-local SlotNum corresponding to the GlobalSlotNum
-	If the global SlotNum is out of range, returns NULL
+	If the global SlotNum is out of range, returns nullptr
 	*/
 	cSlotArea * GetSlotArea(int a_GlobalSlotNum, int & a_LocalSlotNum);
 	
 	/** Returns the correct slot area for the specified window-global SlotNum
 	Also returns the area-local SlotNum corresponding to the GlobalSlotNum
-	If the global SlotNum is out of range, returns NULL.
+	If the global SlotNum is out of range, returns nullptr.
 	Const version.
 	*/
 	const cSlotArea * GetSlotArea(int a_GlobalSlotNum, int & a_LocalSlotNum) const;
diff --git a/src/UI/WindowOwner.h b/src/UI/WindowOwner.h
index 6845a161b..4dc3cf080 100644
--- a/src/UI/WindowOwner.h
+++ b/src/UI/WindowOwner.h
@@ -22,7 +22,7 @@ class cWindowOwner
 {
 public:
 	cWindowOwner() :
-		m_Window(NULL)
+		m_Window(nullptr)
 	{
 	}
 
@@ -32,7 +32,7 @@ public:
 
 	void CloseWindow(void)
 	{
-		m_Window = NULL;
+		m_Window = nullptr;
 	}
 
 	void OpenWindow(cWindow * a_Window)
diff --git a/src/WebAdmin.cpp b/src/WebAdmin.cpp
index db2ace386..dbf600c25 100644
--- a/src/WebAdmin.cpp
+++ b/src/WebAdmin.cpp
@@ -224,7 +224,7 @@ void cWebAdmin::HandleWebadminRequest(cHTTPConnection & a_Connection, cHTTPReque
 
 	// Retrieve the request data:
 	cWebadminRequestData * Data = (cWebadminRequestData *)(a_Request.GetUserData());
-	if (Data == NULL)
+	if (Data == nullptr)
 	{
 		a_Connection.SendStatusAndReason(500, "Bad UserData");
 		return;
@@ -483,7 +483,7 @@ AString cWebAdmin::GetDefaultPage(void)
 	const cPluginManager::PluginMap & List = PM->GetAllPlugins();
 	for (cPluginManager::PluginMap::const_iterator itr = List.begin(); itr != List.end(); ++itr)
 	{
-		if (itr->second == NULL)
+		if (itr->second == nullptr)
 		{
 			continue;
 		}
@@ -494,7 +494,7 @@ AString cWebAdmin::GetDefaultPage(void)
 
 	cPlayerAccum PlayerAccum;
 	cWorld * World = cRoot::Get()->GetDefaultWorld();  // TODO - Create a list of worlds and players
-	if (World != NULL)
+	if (World != nullptr)
 	{
 		World->ForEachPlayer(PlayerAccum);
 		Content.append(PlayerAccum.m_Contents);
@@ -625,7 +625,7 @@ void cWebAdmin::OnRequestBody(cHTTPConnection & a_Connection, cHTTPRequest & a_R
 {
 	UNUSED(a_Connection);
 	cRequestData * Data = (cRequestData *)(a_Request.GetUserData());
-	if (Data == NULL)
+	if (Data == nullptr)
 	{
 		return;
 	}
@@ -659,7 +659,7 @@ void cWebAdmin::OnRequestFinished(cHTTPConnection & a_Connection, cHTTPRequest &
 	// Delete any request data assigned to the request:
 	cRequestData * Data = (cRequestData *)(a_Request.GetUserData());
 	delete Data;
-	Data = NULL;
+	Data = nullptr;
 }
 
 
diff --git a/src/World.cpp b/src/World.cpp
index 1f9361386..ff333ad2a 100644
--- a/src/World.cpp
+++ b/src/World.cpp
@@ -258,10 +258,10 @@ cWorld::cWorld(const AString & a_WorldName, eDimension a_Dimension, const AStrin
 	m_VillagersShouldHarvestCrops(true),
 	m_SimulatorManager(),
 	m_SandSimulator(),
-	m_WaterSimulator(NULL),
+	m_WaterSimulator(nullptr),
 	m_LavaSimulator(nullptr),
 	m_FireSimulator(),
-	m_RedstoneSimulator(NULL),
+	m_RedstoneSimulator(nullptr),
 	m_MaxPlayers(10),
 	m_ChunkMap(),
 	m_bAnimals(true),
@@ -303,9 +303,9 @@ cWorld::cWorld(const AString & a_WorldName, eDimension a_Dimension, const AStrin
 
 cWorld::~cWorld()
 {
-	delete m_WaterSimulator;     m_WaterSimulator    = NULL;
-	delete m_LavaSimulator;      m_LavaSimulator     = NULL;
-	delete m_RedstoneSimulator;  m_RedstoneSimulator = NULL;
+	delete m_WaterSimulator;     m_WaterSimulator    = nullptr;
+	delete m_LavaSimulator;      m_LavaSimulator     = nullptr;
+	delete m_RedstoneSimulator;  m_RedstoneSimulator = nullptr;
 
 	UnloadUnusedChunks();
 	
@@ -1261,7 +1261,7 @@ void cWorld::DoExplosionAt(double a_ExplosionSize, double a_BlockX, double a_Blo
 		for (cPlayerList::iterator itr = m_Players.begin(); itr != m_Players.end(); ++itr)
 		{
 			cClientHandle * ch = (*itr)->GetClientHandle();
-			if (ch == NULL)
+			if (ch == nullptr)
 			{
 				continue;
 			}
@@ -2016,7 +2016,7 @@ void cWorld::BroadcastChat(const AString & a_Message, const cClientHandle * a_Ex
 	for (cPlayerList::iterator itr = m_Players.begin(); itr != m_Players.end(); ++itr)
 	{
 		cClientHandle * ch = (*itr)->GetClientHandle();
-		if ((ch == a_Exclude) || (ch == NULL) || !ch->IsLoggedIn() || ch->IsDestroyed())
+		if ((ch == a_Exclude) || (ch == nullptr) || !ch->IsLoggedIn() || ch->IsDestroyed())
 		{
 			continue;
 		}
@@ -2034,7 +2034,7 @@ void cWorld::BroadcastChat(const cCompositeChat & a_Message, const cClientHandle
 	for (cPlayerList::iterator itr = m_Players.begin(); itr != m_Players.end(); ++itr)
 	{
 		cClientHandle * ch = (*itr)->GetClientHandle();
-		if ((ch == a_Exclude) || (ch == NULL) || !ch->IsLoggedIn() || ch->IsDestroyed())
+		if ((ch == a_Exclude) || (ch == nullptr) || !ch->IsLoggedIn() || ch->IsDestroyed())
 		{
 			continue;
 		}
@@ -2177,7 +2177,7 @@ void cWorld::BroadcastPlayerListAddPlayer(const cPlayer & a_Player, const cClien
 	for (cPlayerList::iterator itr = m_Players.begin(); itr != m_Players.end(); ++itr)
 	{
 		cClientHandle * ch = (*itr)->GetClientHandle();
-		if ((ch == a_Exclude) || (ch == NULL) || !ch->IsLoggedIn() || ch->IsDestroyed())
+		if ((ch == a_Exclude) || (ch == nullptr) || !ch->IsLoggedIn() || ch->IsDestroyed())
 		{
 			continue;
 		}
@@ -2195,7 +2195,7 @@ void cWorld::BroadcastPlayerListRemovePlayer(const cPlayer & a_Player, const cCl
 	for (cPlayerList::iterator itr = m_Players.begin(); itr != m_Players.end(); ++itr)
 	{
 		cClientHandle * ch = (*itr)->GetClientHandle();
-		if ((ch == a_Exclude) || (ch == NULL) || !ch->IsLoggedIn() || ch->IsDestroyed())
+		if ((ch == a_Exclude) || (ch == nullptr) || !ch->IsLoggedIn() || ch->IsDestroyed())
 		{
 			continue;
 		}
@@ -2213,7 +2213,7 @@ void cWorld::BroadcastPlayerListUpdateGameMode(const cPlayer & a_Player, const c
 	for (cPlayerList::iterator itr = m_Players.begin(); itr != m_Players.end(); ++itr)
 	{
 		cClientHandle * ch = (*itr)->GetClientHandle();
-		if ((ch == a_Exclude) || (ch == NULL) || !ch->IsLoggedIn() || ch->IsDestroyed())
+		if ((ch == a_Exclude) || (ch == nullptr) || !ch->IsLoggedIn() || ch->IsDestroyed())
 		{
 			continue;
 		}
@@ -2231,7 +2231,7 @@ void cWorld::BroadcastPlayerListUpdatePing(const cPlayer & a_Player, const cClie
 	for (cPlayerList::iterator itr = m_Players.begin(); itr != m_Players.end(); ++itr)
 	{
 		cClientHandle * ch = (*itr)->GetClientHandle();
-		if ((ch == a_Exclude) || (ch == NULL) || !ch->IsLoggedIn() || ch->IsDestroyed())
+		if ((ch == a_Exclude) || (ch == nullptr) || !ch->IsLoggedIn() || ch->IsDestroyed())
 		{
 			continue;
 		}
@@ -2249,7 +2249,7 @@ void cWorld::BroadcastPlayerListUpdateDisplayName(const cPlayer & a_Player, cons
 	for (cPlayerList::iterator itr = m_Players.begin(); itr != m_Players.end(); ++itr)
 	{
 		cClientHandle * ch = (*itr)->GetClientHandle();
-		if ((ch == a_Exclude) || (ch == NULL) || !ch->IsLoggedIn() || ch->IsDestroyed())
+		if ((ch == a_Exclude) || (ch == nullptr) || !ch->IsLoggedIn() || ch->IsDestroyed())
 		{
 			continue;
 		}
@@ -2276,7 +2276,7 @@ void cWorld::BroadcastScoreboardObjective(const AString & a_Name, const AString
 	for (cPlayerList::iterator itr = m_Players.begin(); itr != m_Players.end(); ++itr)
 	{
 		cClientHandle * ch = (*itr)->GetClientHandle();
-		if ((ch == NULL) || !ch->IsLoggedIn() || ch->IsDestroyed())
+		if ((ch == nullptr) || !ch->IsLoggedIn() || ch->IsDestroyed())
 		{
 			continue;
 		}
@@ -2294,7 +2294,7 @@ void cWorld::BroadcastScoreUpdate(const AString & a_Objective, const AString & a
 	for (cPlayerList::iterator itr = m_Players.begin(); itr != m_Players.end(); ++itr)
 	{
 		cClientHandle * ch = (*itr)->GetClientHandle();
-		if ((ch == NULL) || !ch->IsLoggedIn() || ch->IsDestroyed())
+		if ((ch == nullptr) || !ch->IsLoggedIn() || ch->IsDestroyed())
 		{
 			continue;
 		}
@@ -2312,7 +2312,7 @@ void cWorld::BroadcastDisplayObjective(const AString & a_Objective, cScoreboard:
 	for (cPlayerList::iterator itr = m_Players.begin(); itr != m_Players.end(); ++itr)
 	{
 		cClientHandle * ch = (*itr)->GetClientHandle();
-		if ((ch == NULL) || !ch->IsLoggedIn() || ch->IsDestroyed())
+		if ((ch == nullptr) || !ch->IsLoggedIn() || ch->IsDestroyed())
 		{
 			continue;
 		}
@@ -2357,7 +2357,7 @@ void cWorld::BroadcastTeleportEntity(const cEntity & a_Entity, const cClientHand
 	for (cPlayerList::iterator itr = m_Players.begin(); itr != m_Players.end(); ++itr)
 	{
 		cClientHandle * ch = (*itr)->GetClientHandle();
-		if ((ch == a_Exclude) || (ch == NULL) || !ch->IsLoggedIn() || ch->IsDestroyed())
+		if ((ch == a_Exclude) || (ch == nullptr) || !ch->IsLoggedIn() || ch->IsDestroyed())
 		{
 			continue;
 		}
@@ -2384,7 +2384,7 @@ void cWorld::BroadcastTimeUpdate(const cClientHandle * a_Exclude)
 	for (cPlayerList::iterator itr = m_Players.begin(); itr != m_Players.end(); ++itr)
 	{
 		cClientHandle * ch = (*itr)->GetClientHandle();
-		if ((ch == a_Exclude) || (ch == NULL) || !ch->IsLoggedIn() || ch->IsDestroyed())
+		if ((ch == a_Exclude) || (ch == nullptr) || !ch->IsLoggedIn() || ch->IsDestroyed())
 		{
 			continue;
 		}
@@ -2411,7 +2411,7 @@ void cWorld::BroadcastWeather(eWeather a_Weather, const cClientHandle * a_Exclud
 	for (cPlayerList::iterator itr = m_Players.begin(); itr != m_Players.end(); ++itr)
 	{
 		cClientHandle * ch = (*itr)->GetClientHandle();
-		if ((ch == a_Exclude) || (ch == NULL) || !ch->IsLoggedIn() || ch->IsDestroyed())
+		if ((ch == a_Exclude) || (ch == nullptr) || !ch->IsLoggedIn() || ch->IsDestroyed())
 		{
 			continue;
 		}
@@ -2646,7 +2646,7 @@ void cWorld::RemovePlayer(cPlayer * a_Player, bool a_RemoveFromChunk)
 	
 	// Remove the player's client from the list of clients to be ticked:
 	cClientHandle * Client = a_Player->GetClientHandle();
-	if (Client != NULL)
+	if (Client != nullptr)
 	{
 		Client->RemoveFromWorld();
 		m_ChunkMap->RemoveClientFromChunks(Client);
@@ -2699,7 +2699,7 @@ bool cWorld::DoWithPlayer(const AString & a_PlayerName, cPlayerListCallback & a_
 
 bool cWorld::FindAndDoWithPlayer(const AString & a_PlayerNameHint, cPlayerListCallback & a_Callback)
 {
-	cPlayer * BestMatch = NULL;
+	cPlayer * BestMatch = nullptr;
 	size_t BestRating = 0;
 	size_t NameLength = a_PlayerNameHint.length();
 
@@ -2718,7 +2718,7 @@ bool cWorld::FindAndDoWithPlayer(const AString & a_PlayerNameHint, cPlayerListCa
 		}
 	}  // for itr - m_Players[]
 
-	if (BestMatch != NULL)
+	if (BestMatch != nullptr)
 	{
 		return a_Callback.Item (BestMatch);
 	}
@@ -2735,7 +2735,7 @@ cPlayer * cWorld::FindClosestPlayer(const Vector3d & a_Pos, float a_SightLimit,
 	cTracer LineOfSight(this);
 
 	double ClosestDistance = a_SightLimit;
-	cPlayer * ClosestPlayer = NULL;
+	cPlayer * ClosestPlayer = nullptr;
 
 	cCSLock Lock(m_CSPlayers);
 	for (cPlayerList::const_iterator itr = m_Players.begin(); itr != m_Players.end(); ++itr)
@@ -2774,7 +2774,7 @@ void cWorld::SendPlayerList(cPlayer * a_DestPlayer)
 	for (cPlayerList::iterator itr = m_Players.begin(); itr != m_Players.end(); ++itr)
 	{
 		cClientHandle * ch = (*itr)->GetClientHandle();
-		if ((ch != NULL) && !ch->IsDestroyed())
+		if ((ch != nullptr) && !ch->IsDestroyed())
 		{
 			a_DestPlayer->GetClientHandle()->SendPlayerListAddPlayer(*(*itr));
 		}
@@ -3218,10 +3218,10 @@ bool cWorld::IsBlockDirectlyWatered(int a_BlockX, int a_BlockY, int a_BlockZ)
 
 int cWorld::SpawnMob(double a_PosX, double a_PosY, double a_PosZ, eMonsterType a_MonsterType)
 {
-	cMonster * Monster = NULL;
+	cMonster * Monster = nullptr;
 
 	Monster = cMonster::NewMonsterFromType(a_MonsterType);
-	if (Monster != NULL)
+	if (Monster != nullptr)
 	{
 		Monster->SetPosition(a_PosX, a_PosY, a_PosZ);
 	}
@@ -3247,7 +3247,7 @@ int cWorld::SpawnMobFinalize(cMonster * a_Monster)
 	if (cPluginManager::Get()->CallHookSpawningMonster(*this, *a_Monster))
 	{
 		delete a_Monster;
-		a_Monster = NULL;
+		a_Monster = nullptr;
 		return -1;
 	}
 
@@ -3255,7 +3255,7 @@ int cWorld::SpawnMobFinalize(cMonster * a_Monster)
 	if (!a_Monster->Initialize(*this))
 	{
 		delete a_Monster;
-		a_Monster = NULL;
+		a_Monster = nullptr;
 		return -1;
 	}
 
@@ -3272,14 +3272,14 @@ int cWorld::SpawnMobFinalize(cMonster * a_Monster)
 int cWorld::CreateProjectile(double a_PosX, double a_PosY, double a_PosZ, cProjectileEntity::eKind a_Kind, cEntity * a_Creator, const cItem * a_Item, const Vector3d * a_Speed)
 {
 	cProjectileEntity * Projectile = cProjectileEntity::Create(a_Kind, a_Creator, a_PosX, a_PosY, a_PosZ, a_Item, a_Speed);
-	if (Projectile == NULL)
+	if (Projectile == nullptr)
 	{
 		return -1;
 	}
 	if (!Projectile->Initialize(*this))
 	{
 		delete Projectile;
-		Projectile = NULL;
+		Projectile = nullptr;
 		return -1;
 	}
 	return Projectile->GetUniqueID();
@@ -3362,7 +3362,7 @@ cRedstoneSimulator<cChunk, cWorld> * cWorld::InitializeRedstoneSimulator(cIniFil
 		SimulatorName = "Incremental";
 	}
 	
-	cRedstoneSimulator<cChunk, cWorld> * res = NULL;
+	cRedstoneSimulator<cChunk, cWorld> * res = nullptr;
 
 	if (NoCaseCompare(SimulatorName, "Incremental") == 0)
 	{
@@ -3395,7 +3395,7 @@ cFluidSimulator * cWorld::InitializeFluidSimulator(cIniFile & a_IniFile, const c
 		SimulatorName = "Vanilla";
 	}
 	
-	cFluidSimulator * res = NULL;
+	cFluidSimulator * res = nullptr;
 	bool IsWater = (strcmp(a_FluidName, "Water") == 0);  // Used for defaults
 	int Rate = 1;
 	if (
@@ -3485,7 +3485,7 @@ void cWorld::AddQueuedPlayers(void)
 		for (cPlayerList::iterator itr = PlayersToAdd.begin(), end = PlayersToAdd.end(); itr != end; ++itr)
 		{
 			cClientHandle * Client = (*itr)->GetClientHandle();
-			if (Client != NULL)
+			if (Client != nullptr)
 			{
 				m_Clients.push_back(Client);
 			}
@@ -3496,7 +3496,7 @@ void cWorld::AddQueuedPlayers(void)
 	for (cPlayerList::iterator itr = PlayersToAdd.begin(), end = PlayersToAdd.end(); itr != end; ++itr)
 	{
 		cClientHandle * Client = (*itr)->GetClientHandle();
-		if (Client != NULL)
+		if (Client != nullptr)
 		{
 			Client->StreamChunks();
 			Client->SendPlayerMoveLook();
@@ -3597,7 +3597,7 @@ void cWorld::cChunkGeneratorCallbacks::OnChunkGenerated(cChunkDesc & a_ChunkDesc
 	cSetChunkDataPtr SetChunkData(new cSetChunkData(
 		a_ChunkDesc.GetChunkX(), a_ChunkDesc.GetChunkZ(),
 		a_ChunkDesc.GetBlockTypes(), BlockMetas,
-		NULL, NULL,  // We don't have lighting, chunk will be lighted when needed
+		nullptr, nullptr,  // We don't have lighting, chunk will be lighted when needed
 		&a_ChunkDesc.GetHeightMap(), &a_ChunkDesc.GetBiomeMap(),
 		a_ChunkDesc.GetEntities(), a_ChunkDesc.GetBlockEntities(),
 		true
diff --git a/src/World.h b/src/World.h
index 0ced90562..d5f1994a5 100644
--- a/src/World.h
+++ b/src/World.h
@@ -84,7 +84,7 @@ class cWorld :
 public:
 
 	// tolua_end
-
+	
 	/** A simple RAII locker for the chunkmap - locks the chunkmap in its constructor, unlocks it in the destructor */
 	class cLock :
 		public cCSLock
@@ -94,7 +94,7 @@ public:
 		cLock(cWorld & a_World);
 	} ;
 
-
+	
 	/** A common ancestor for all tasks queued onto the tick thread */
 	class cTask
 	{
@@ -102,10 +102,10 @@ public:
 		virtual ~cTask() {}
 		virtual void Run(cWorld & a_World) = 0;
 	} ;
-
+	
 	typedef std::vector<std::unique_ptr<cTask>> cTasks;
 
-
+	
 	class cTaskSaveAllChunks :
 		public cTask
 	{
@@ -113,7 +113,7 @@ public:
 		// cTask overrides:
 		virtual void Run(cWorld & a_World) override;
 	} ;
-
+	
 
 	class cTaskUnloadUnusedChunks :
 		public cTask
@@ -142,7 +142,7 @@ public:
 	{
 		return "cWorld";
 	}
-
+	
 	// tolua_begin
 
 	int GetTicksUntilWeatherChange(void) const { return m_WeatherInterval; }
@@ -159,7 +159,7 @@ public:
 
 	virtual Int64 GetWorldAge (void) const override { return m_WorldAge; }
 	virtual int GetTimeOfDay(void) const override { return m_TimeOfDay; }
-
+	
 	void SetTicksUntilWeatherChange(int a_WeatherInterval)
 	{
 		m_WeatherInterval = a_WeatherInterval;
@@ -168,42 +168,42 @@ public:
 	virtual void SetTimeOfDay(int a_TimeOfDay) override
 	{
 		m_TimeOfDay = a_TimeOfDay;
-		m_TimeOfDaySecs = static_cast<double>(a_TimeOfDay) / 20.0;
+		m_TimeOfDaySecs = (double)a_TimeOfDay / 20.0;
 		UpdateSkyDarkness();
 		BroadcastTimeUpdate();
 	}
-
+	
 	/** Returns the default weather interval for the specific weather type.
 	Returns -1 for any unknown weather. */
 	int GetDefaultWeatherInterval(eWeather a_Weather);
-
+	
 	/** Returns the current game mode. Partly OBSOLETE, you should use IsGameModeXXX() functions wherever applicable */
 	eGameMode GetGameMode(void) const { return m_GameMode; }
 
 	/** Returns true if the world is in Creative mode */
 	bool IsGameModeCreative(void) const { return (m_GameMode == gmCreative); }
-
+	
 	/** Returns true if the world is in Survival mode */
 	bool IsGameModeSurvival(void) const { return (m_GameMode == gmSurvival); }
-
+	
 	/** Returns true if the world is in Adventure mode */
 	bool IsGameModeAdventure(void) const { return (m_GameMode == gmAdventure); }
-
+	
 	/** Returns true if the world is in Spectator mode */
 	bool IsGameModeSpectator(void) const { return (m_GameMode == gmSpectator); }
-
+	
 	bool IsPVPEnabled(void) const { return m_bEnabledPVP; }
 	bool IsDeepSnowEnabled(void) const { return m_IsDeepSnowEnabled; }
-
+	
 	bool ShouldLavaSpawnFire(void) const { return m_ShouldLavaSpawnFire; }
-
+	
 	bool VillagersShouldHarvestCrops(void) const { return m_VillagersShouldHarvestCrops; }
 
 	virtual eDimension GetDimension(void) const { return m_Dimension; }
 
 	/** Returns the world height at the specified coords; waits for the chunk to get loaded / generated */
 	virtual int GetHeight(int a_BlockX, int a_BlockZ);
-
+	
 	// tolua_end
 
 	/** Retrieves the world height at the specified coords; returns false if chunk not loaded / generated */
@@ -212,81 +212,81 @@ public:
 	// Broadcast respective packets to all clients of the chunk where the event is taking place
 	// (Please keep these alpha-sorted)
 	void BroadcastAttachEntity       (const cEntity & a_Entity, const cEntity * a_Vehicle);
-	void BroadcastBlockAction        (int a_BlockX, int a_BlockY, int a_BlockZ, char a_Byte1, char a_Byte2, BLOCKTYPE a_BlockType, const cClientHandle * a_Exclude = NULL);  // tolua_export
-	void BroadcastBlockBreakAnimation(int a_EntityID, int a_BlockX, int a_BlockY, int a_BlockZ, char a_Stage, const cClientHandle * a_Exclude = NULL);
-	void BroadcastBlockEntity        (int a_BlockX, int a_BlockY, int a_BlockZ, const cClientHandle * a_Exclude = NULL);  ///< If there is a block entity at the specified coods, sends it to all clients except a_Exclude
+	void BroadcastBlockAction        (int a_BlockX, int a_BlockY, int a_BlockZ, char a_Byte1, char a_Byte2, BLOCKTYPE a_BlockType, const cClientHandle * a_Exclude = nullptr);  // tolua_export
+	void BroadcastBlockBreakAnimation(int a_EntityID, int a_BlockX, int a_BlockY, int a_BlockZ, char a_Stage, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastBlockEntity        (int a_BlockX, int a_BlockY, int a_BlockZ, const cClientHandle * a_Exclude = nullptr);  ///< If there is a block entity at the specified coods, sends it to all clients except a_Exclude
 
 	// tolua_begin
-	void BroadcastChat       (const AString & a_Message, const cClientHandle * a_Exclude = NULL, eMessageType a_ChatPrefix = mtCustom);
-	void BroadcastChatInfo   (const AString & a_Message, const cClientHandle * a_Exclude = NULL) { BroadcastChat(a_Message, a_Exclude, mtInformation); }
-	void BroadcastChatFailure(const AString & a_Message, const cClientHandle * a_Exclude = NULL) { BroadcastChat(a_Message, a_Exclude, mtFailure); }
-	void BroadcastChatSuccess(const AString & a_Message, const cClientHandle * a_Exclude = NULL) { BroadcastChat(a_Message, a_Exclude, mtSuccess); }
-	void BroadcastChatWarning(const AString & a_Message, const cClientHandle * a_Exclude = NULL) { BroadcastChat(a_Message, a_Exclude, mtWarning); }
-	void BroadcastChatFatal  (const AString & a_Message, const cClientHandle * a_Exclude = NULL) { BroadcastChat(a_Message, a_Exclude, mtFailure); }
-	void BroadcastChatDeath  (const AString & a_Message, const cClientHandle * a_Exclude = NULL) { BroadcastChat(a_Message, a_Exclude, mtDeath); }
-	void BroadcastChat       (const cCompositeChat & a_Message, const cClientHandle * a_Exclude = NULL);
+	void BroadcastChat       (const AString & a_Message, const cClientHandle * a_Exclude = nullptr, eMessageType a_ChatPrefix = mtCustom);
+	void BroadcastChatInfo   (const AString & a_Message, const cClientHandle * a_Exclude = nullptr) { BroadcastChat(a_Message, a_Exclude, mtInformation); }
+	void BroadcastChatFailure(const AString & a_Message, const cClientHandle * a_Exclude = nullptr) { BroadcastChat(a_Message, a_Exclude, mtFailure); }
+	void BroadcastChatSuccess(const AString & a_Message, const cClientHandle * a_Exclude = nullptr) { BroadcastChat(a_Message, a_Exclude, mtSuccess); }
+	void BroadcastChatWarning(const AString & a_Message, const cClientHandle * a_Exclude = nullptr) { BroadcastChat(a_Message, a_Exclude, mtWarning); }
+	void BroadcastChatFatal  (const AString & a_Message, const cClientHandle * a_Exclude = nullptr) { BroadcastChat(a_Message, a_Exclude, mtFailure); }
+	void BroadcastChatDeath  (const AString & a_Message, const cClientHandle * a_Exclude = nullptr) { BroadcastChat(a_Message, a_Exclude, mtDeath); }
+	void BroadcastChat       (const cCompositeChat & a_Message, const cClientHandle * a_Exclude = nullptr);
 	// tolua_end
 
-	void BroadcastChunkData                  (int a_ChunkX, int a_ChunkZ, cChunkDataSerializer & a_Serializer, const cClientHandle * a_Exclude = NULL);
-	void BroadcastCollectEntity              (const cEntity & a_Pickup, const cPlayer & a_Player, const cClientHandle * a_Exclude = NULL);
-	void BroadcastDestroyEntity              (const cEntity & a_Entity, const cClientHandle * a_Exclude = NULL);
-	void BroadcastEntityEffect               (const cEntity & a_Entity, int a_EffectID, int a_Amplifier, short a_Duration, const cClientHandle * a_Exclude = NULL);
-	void BroadcastEntityEquipment            (const cEntity & a_Entity, short a_SlotNum, const cItem & a_Item, const cClientHandle * a_Exclude = NULL);
-	void BroadcastEntityHeadLook             (const cEntity & a_Entity, const cClientHandle * a_Exclude = NULL);
-	void BroadcastEntityLook                 (const cEntity & a_Entity, const cClientHandle * a_Exclude = NULL);
-	void BroadcastEntityMetadata             (const cEntity & a_Entity, const cClientHandle * a_Exclude = NULL);
-	void BroadcastEntityRelMove              (const cEntity & a_Entity, char a_RelX, char a_RelY, char a_RelZ, const cClientHandle * a_Exclude = NULL);
-	void BroadcastEntityRelMoveLook          (const cEntity & a_Entity, char a_RelX, char a_RelY, char a_RelZ, const cClientHandle * a_Exclude = NULL);
-	void BroadcastEntityStatus               (const cEntity & a_Entity, char a_Status, const cClientHandle * a_Exclude = NULL);
-	void BroadcastEntityVelocity             (const cEntity & a_Entity, const cClientHandle * a_Exclude = NULL);
-	virtual void BroadcastEntityAnimation    (const cEntity & a_Entity, char a_Animation, const cClientHandle * a_Exclude = NULL) override;  // tolua_export
-	void BroadcastParticleEffect             (const AString & a_ParticleName, float a_SrcX, float a_SrcY, float a_SrcZ, float a_OffsetX, float a_OffsetY, float a_OffsetZ, float a_ParticleData, int a_ParticleAmount, cClientHandle * a_Exclude = NULL);  // tolua_export
-	void BroadcastPlayerListAddPlayer        (const cPlayer & a_Player, const cClientHandle * a_Exclude = NULL);
-	void BroadcastPlayerListRemovePlayer     (const cPlayer & a_Player, const cClientHandle * a_Exclude = NULL);
-	void BroadcastPlayerListUpdateGameMode   (const cPlayer & a_Player, const cClientHandle * a_Exclude = NULL);
-	void BroadcastPlayerListUpdatePing       (const cPlayer & a_Player, const cClientHandle * a_Exclude = NULL);
-	void BroadcastPlayerListUpdateDisplayName(const cPlayer & a_Player, const AString & a_CustomName, const cClientHandle * a_Exclude = NULL);
-	void BroadcastRemoveEntityEffect         (const cEntity & a_Entity, int a_EffectID, const cClientHandle * a_Exclude = NULL);
+	void BroadcastChunkData                  (int a_ChunkX, int a_ChunkZ, cChunkDataSerializer & a_Serializer, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastCollectEntity              (const cEntity & a_Pickup, const cPlayer & a_Player, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastDestroyEntity              (const cEntity & a_Entity, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastEntityEffect               (const cEntity & a_Entity, int a_EffectID, int a_Amplifier, short a_Duration, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastEntityEquipment            (const cEntity & a_Entity, short a_SlotNum, const cItem & a_Item, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastEntityHeadLook             (const cEntity & a_Entity, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastEntityLook                 (const cEntity & a_Entity, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastEntityMetadata             (const cEntity & a_Entity, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastEntityRelMove              (const cEntity & a_Entity, char a_RelX, char a_RelY, char a_RelZ, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastEntityRelMoveLook          (const cEntity & a_Entity, char a_RelX, char a_RelY, char a_RelZ, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastEntityStatus               (const cEntity & a_Entity, char a_Status, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastEntityVelocity             (const cEntity & a_Entity, const cClientHandle * a_Exclude = nullptr);
+	virtual void BroadcastEntityAnimation    (const cEntity & a_Entity, char a_Animation, const cClientHandle * a_Exclude = nullptr) override;  // tolua_export
+	void BroadcastParticleEffect             (const AString & a_ParticleName, float a_SrcX, float a_SrcY, float a_SrcZ, float a_OffsetX, float a_OffsetY, float a_OffsetZ, float a_ParticleData, int a_ParticleAmount, cClientHandle * a_Exclude = nullptr);  // tolua_export
+	void BroadcastPlayerListAddPlayer        (const cPlayer & a_Player, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastPlayerListRemovePlayer     (const cPlayer & a_Player, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastPlayerListUpdateGameMode   (const cPlayer & a_Player, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastPlayerListUpdatePing       (const cPlayer & a_Player, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastPlayerListUpdateDisplayName(const cPlayer & a_Player, const AString & a_CustomName, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastRemoveEntityEffect         (const cEntity & a_Entity, int a_EffectID, const cClientHandle * a_Exclude = nullptr);
 	void BroadcastScoreboardObjective        (const AString & a_Name, const AString & a_DisplayName, Byte a_Mode);
 	void BroadcastScoreUpdate                (const AString & a_Objective, const AString & a_Player, cObjective::Score a_Score, Byte a_Mode);
 	void BroadcastDisplayObjective           (const AString & a_Objective, cScoreboard::eDisplaySlot a_Display);
-	void BroadcastSoundEffect                (const AString & a_SoundName, double a_X, double a_Y, double a_Z, float a_Volume, float a_Pitch, const cClientHandle * a_Exclude = NULL);   // tolua_export
-	void BroadcastSoundParticleEffect        (int a_EffectID, int a_SrcX, int a_SrcY, int a_SrcZ, int a_Data, const cClientHandle * a_Exclude = NULL);  // tolua_export
-	void BroadcastSpawnEntity                (cEntity & a_Entity, const cClientHandle * a_Exclude = NULL);
-	void BroadcastTeleportEntity             (const cEntity & a_Entity, const cClientHandle * a_Exclude = NULL);
-	void BroadcastThunderbolt                (int a_BlockX, int a_BlockY, int a_BlockZ, const cClientHandle * a_Exclude = NULL);
-	void BroadcastTimeUpdate                 (const cClientHandle * a_Exclude = NULL);
+	void BroadcastSoundEffect                (const AString & a_SoundName, double a_X, double a_Y, double a_Z, float a_Volume, float a_Pitch, const cClientHandle * a_Exclude = nullptr);   // tolua_export
+	void BroadcastSoundParticleEffect        (int a_EffectID, int a_SrcX, int a_SrcY, int a_SrcZ, int a_Data, const cClientHandle * a_Exclude = nullptr);  // tolua_export
+	void BroadcastSpawnEntity                (cEntity & a_Entity, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastTeleportEntity             (const cEntity & a_Entity, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastThunderbolt                (int a_BlockX, int a_BlockY, int a_BlockZ, const cClientHandle * a_Exclude = nullptr);
+	void BroadcastTimeUpdate                 (const cClientHandle * a_Exclude = nullptr);
 	virtual void BroadcastUseBed             (const cEntity & a_Entity, int a_BlockX, int a_BlockY, int a_BlockZ) override;
-	void BroadcastWeather                    (eWeather a_Weather, const cClientHandle * a_Exclude = NULL);
-
+	void BroadcastWeather                    (eWeather a_Weather, const cClientHandle * a_Exclude = nullptr);
+	
 	virtual cBroadcastInterface & GetBroadcastManager(void) override
 	{
 		return *this;
 	}
-
+	
 	/** If there is a block entity at the specified coords, sends it to the client specified */
 	void SendBlockEntity(int a_BlockX, int a_BlockY, int a_BlockZ, cClientHandle & a_Client);
-
+	
 	void MarkRedstoneDirty(int a_ChunkX, int a_ChunkZ);
 	void MarkChunkDirty (int a_ChunkX, int a_ChunkZ, bool a_MarkRedstoneDirty = false);
 	void MarkChunkSaving(int a_ChunkX, int a_ChunkZ);
 	void MarkChunkSaved (int a_ChunkX, int a_ChunkZ);
-
+	
 	/** Puts the chunk data into a queue to be set into the chunkmap in the tick thread.
 	If the chunk data doesn't contain valid biomes, the biomes are calculated before adding the data into the queue. */
 	void QueueSetChunkData(const cSetChunkDataPtr & a_SetChunkData);
-
+	
 	void ChunkLighted(
 		int a_ChunkX, int a_ChunkZ,
 		const cChunkDef::BlockNibbles & a_BlockLight,
 		const cChunkDef::BlockNibbles & a_SkyLight
 	);
-
+	
 	bool GetChunkData      (int a_ChunkX, int a_ChunkZ, cChunkDataCallback & a_Callback);
-
+	
 	/** Gets the chunk's blocks, only the block types */
 	bool GetChunkBlockTypes(int a_ChunkX, int a_ChunkZ, BLOCKTYPE * a_BlockTypes);
-
+	
 	/** Returns true iff the chunk is in the loader / generator queue. */
 	bool IsChunkQueued(int a_ChunkX, int a_ChunkZ) const;
 
@@ -294,10 +294,10 @@ public:
 	bool IsChunkValid(int a_ChunkX, int a_ChunkZ) const;
 
 	bool HasChunkAnyClients(int a_ChunkX, int a_ChunkZ) const;
-
+	
 	/** Queues a task to unload unused chunks onto the tick thread. The prefferred way of unloading*/
 	void QueueUnloadUnusedChunks(void);  // tolua_export
-
+	
 	void CollectPickupsByPlayer(cPlayer & a_Player);
 
 	/** Adds the player to the world.
@@ -319,21 +319,21 @@ public:
 
 	/** Finds a player from a partial or complete player name and calls the callback - case-insensitive */
 	bool FindAndDoWithPlayer(const AString & a_PlayerNameHint, cPlayerListCallback & a_Callback);  // >> EXPORTED IN MANUALBINDINGS <<
-
+	
 	// TODO: This interface is dangerous - rewrite to DoWithClosestPlayer(pos, sight, action)
 	cPlayer * FindClosestPlayer(const Vector3d & a_Pos, float a_SightLimit, bool a_CheckLineOfSight = true);
-
+	
 	void SendPlayerList(cPlayer * a_DestPlayer);  // Sends playerlist to the player
 
 	/** Adds the entity into its appropriate chunk; takes ownership of the entity ptr.
 	The entity is added lazily - this function only puts it in a queue that is then processed by the Tick thread. */
 	void AddEntity(cEntity * a_Entity);
-
+	
 	bool HasEntity(int a_UniqueID);
-
+	
 	/** Calls the callback for each entity in the entire world; returns true if all entities processed, false if the callback aborted by returning true */
 	bool ForEachEntity(cEntityCallback & a_Callback);  // Exported in ManualBindings.cpp
-
+	
 	/** Calls the callback for each entity in the specified chunk; returns true if all entities processed, false if the callback aborted by returning true */
 	bool ForEachEntityInChunk(int a_ChunkX, int a_ChunkZ, cEntityCallback & a_Callback);  // Exported in ManualBindings.cpp
 
@@ -347,38 +347,38 @@ public:
 
 	/** Compares clients of two chunks, calls the callback accordingly */
 	void CompareChunkClients(int a_ChunkX1, int a_ChunkZ1, int a_ChunkX2, int a_ChunkZ2, cClientDiffCallback & a_Callback);
-
+	
 	/** Adds client to a chunk, if not already present; returns true if added, false if present */
 	bool AddChunkClient(int a_ChunkX, int a_ChunkZ, cClientHandle * a_Client);
-
+	
 	/** Removes client from the chunk specified */
 	void RemoveChunkClient(int a_ChunkX, int a_ChunkZ, cClientHandle * a_Client);
-
+	
 	/** Removes the client from all chunks it is present in */
 	void RemoveClientFromChunks(cClientHandle * a_Client);
-
+	
 	/** Sends the chunk to the client specified, if the client doesn't have the chunk yet.
 	If chunk not valid, the request is postponed (ChunkSender will send that chunk when it becomes valid + lighted). */
 	void SendChunkTo(int a_ChunkX, int a_ChunkZ, cClientHandle * a_Client);
-
+	
 	/** Sends the chunk to the client specified, even if the client already has the chunk.
 	If the chunk's not valid, the request is postponed (ChunkSender will send that chunk when it becomes valid + lighted). */
 	void ForceSendChunkTo(int a_ChunkX, int a_ChunkZ, cClientHandle * a_Client);
-
+	
 	/** Removes client from ChunkSender's queue of chunks to be sent */
 	void RemoveClientFromChunkSender(cClientHandle * a_Client);
-
+	
 	/** Touches the chunk, causing it to be loaded or generated */
 	void TouchChunk(int a_ChunkX, int a_ChunkZ);
-
+	
 	/** Marks the chunk as failed-to-load: */
 	void ChunkLoadFailed(int a_ChunkX, int a_ChunkZ);
-
-	/** Sets the sign text, asking plugins for permission first. a_Player is the player who this change belongs to, may be NULL. Returns true if sign text changed. Same as UpdateSign() */
-	bool SetSignLines(int a_BlockX, int a_BlockY, int a_BlockZ, const AString & a_Line1, const AString & a_Line2, const AString & a_Line3, const AString & a_Line4, cPlayer * a_Player = NULL);  // Exported in ManualBindings.cpp
-
-	/** Sets the sign text, asking plugins for permission first. a_Player is the player who this change belongs to, may be NULL. Returns true if sign text changed. Same as SetSignLines() */
-	bool UpdateSign(int a_X, int a_Y, int a_Z, const AString & a_Line1, const AString & a_Line2, const AString & a_Line3, const AString & a_Line4, cPlayer * a_Player = NULL);  // Exported in ManualBindings.cpp
+	
+	/** Sets the sign text, asking plugins for permission first. a_Player is the player who this change belongs to, may be nullptr. Returns true if sign text changed. Same as UpdateSign() */
+	bool SetSignLines(int a_BlockX, int a_BlockY, int a_BlockZ, const AString & a_Line1, const AString & a_Line2, const AString & a_Line3, const AString & a_Line4, cPlayer * a_Player = nullptr);  // Exported in ManualBindings.cpp
+	
+	/** Sets the sign text, asking plugins for permission first. a_Player is the player who this change belongs to, may be nullptr. Returns true if sign text changed. Same as SetSignLines() */
+	bool UpdateSign(int a_X, int a_Y, int a_Z, const AString & a_Line1, const AString & a_Line2, const AString & a_Line3, const AString & a_Line4, cPlayer * a_Player = nullptr);  // Exported in ManualBindings.cpp
 
 	/** Sets the command block command. Returns true if command changed. */
 	bool SetCommandBlockCommand(int a_BlockX, int a_BlockY, int a_BlockZ, const AString & a_Command);  // tolua_export
@@ -391,25 +391,25 @@ public:
 
 	/** Regenerate the given chunk: */
 	void RegenerateChunk(int a_ChunkX, int a_ChunkZ);  // tolua_export
-
+	
 	/** Generates the given chunk */
 	void GenerateChunk(int a_ChunkX, int a_ChunkZ);  // tolua_export
-
+	
 	/** Queues a chunk for lighting; a_Callback is called after the chunk is lighted */
-	void QueueLightChunk(int a_ChunkX, int a_ChunkZ, cChunkCoordCallback * a_Callback = NULL);
-
+	void QueueLightChunk(int a_ChunkX, int a_ChunkZ, cChunkCoordCallback * a_Callback = nullptr);
+	
 	bool IsChunkLighted(int a_ChunkX, int a_ChunkZ);
-
+	
 	/** Calls the callback for each chunk in the coords specified (all cords are inclusive). Returns true if all chunks have been processed successfully */
 	virtual bool ForEachChunkInRect(int a_MinChunkX, int a_MaxChunkX, int a_MinChunkZ, int a_MaxChunkZ, cChunkDataCallback & a_Callback) override;
 
 	// tolua_begin
-
+	
 	/** Sets the block at the specified coords to the specified value.
 	Full processing, incl. updating neighbors, is performed.
 	*/
 	void SetBlock(int a_BlockX, int a_BlockY, int a_BlockZ, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta, bool a_SendToClients = true);
-
+	
 	/** Sets the block at the specified coords to the specified value.
 	The replacement doesn't trigger block updates.
 	The replaced blocks aren't checked for block entities (block entity is leaked if it exists at this block)
@@ -418,7 +418,7 @@ public:
 	{
 		m_ChunkMap->FastSetBlock(a_BlockX, a_BlockY, a_BlockZ, a_BlockType, a_BlockMeta);
 	}
-
+	
 	/** Queues a SetBlock() with the specified parameters after the specified number of ticks.
 	Calls SetBlock(), so performs full processing of the replaced block.
 	*/
@@ -426,12 +426,12 @@ public:
 	{
 		m_ChunkMap->QueueSetBlock(a_BlockX, a_BlockY, a_BlockZ, a_BlockType, a_BlockMeta, GetWorldAge() + a_TickDelay, a_PreviousBlockType);
 	}
-
+	
 	BLOCKTYPE  GetBlock          (int a_BlockX, int a_BlockY, int a_BlockZ)
 	{
 		return m_ChunkMap->GetBlock(a_BlockX, a_BlockY, a_BlockZ);
 	}
-
+	
 	NIBBLETYPE GetBlockMeta      (int a_BlockX, int a_BlockY, int a_BlockZ)
 	{
 		return m_ChunkMap->GetBlockMeta(a_BlockX, a_BlockY, a_BlockZ);
@@ -439,37 +439,37 @@ public:
 	void       SetBlockMeta      (int a_BlockX, int a_BlockY, int a_BlockZ, NIBBLETYPE a_MetaData);
 	NIBBLETYPE GetBlockSkyLight  (int a_BlockX, int a_BlockY, int a_BlockZ);
 	NIBBLETYPE GetBlockBlockLight(int a_BlockX, int a_BlockY, int a_BlockZ);
-
+	
 	// tolua_end
-
+	
 	bool GetBlockTypeMeta  (int a_BlockX, int a_BlockY, int a_BlockZ, BLOCKTYPE & a_BlockType, NIBBLETYPE & a_BlockMeta);  // TODO: Exported in ManualBindings.cpp
 	bool GetBlockInfo      (int a_BlockX, int a_BlockY, int a_BlockZ, BLOCKTYPE & a_BlockType, NIBBLETYPE & a_Meta, NIBBLETYPE & a_SkyLight, NIBBLETYPE & a_BlockLight);  // TODO: Exported in ManualBindings.cpp
 	// TODO: NIBBLETYPE GetBlockActualLight(int a_BlockX, int a_BlockY, int a_BlockZ);
 
 	// tolua_begin
-
+	
 	// Vector3i variants:
 	void       FastSetBlock(const Vector3i & a_Pos, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta) { FastSetBlock( a_Pos.x, a_Pos.y, a_Pos.z, a_BlockType, a_BlockMeta); }
 	BLOCKTYPE  GetBlock    (const Vector3i & a_Pos) { return GetBlock( a_Pos.x, a_Pos.y, a_Pos.z); }
 	NIBBLETYPE GetBlockMeta(const Vector3i & a_Pos) { return GetBlockMeta( a_Pos.x, a_Pos.y, a_Pos.z); }
 	void       SetBlockMeta(const Vector3i & a_Pos, NIBBLETYPE a_MetaData) { SetBlockMeta( a_Pos.x, a_Pos.y, a_Pos.z, a_MetaData); }
 	// tolua_end
-
+	
 	/** Writes the block area into the specified coords.
 	Returns true if all chunks have been processed.
 	Prefer cBlockArea::Write() instead, this is the internal implementation; cBlockArea does error checking, too.
 	a_DataTypes is a bitmask of cBlockArea::baXXX constants ORed together.
 	*/
 	virtual bool WriteBlockArea(cBlockArea & a_Area, int a_MinBlockX, int a_MinBlockY, int a_MinBlockZ, int a_DataTypes) override;
-
+	
 	// tolua_begin
 
 	/** Spawns item pickups for each item in the list. May compress pickups if too many entities: */
 	virtual void SpawnItemPickups(const cItems & a_Pickups, double a_BlockX, double a_BlockY, double a_BlockZ, double a_FlyAwaySpeed = 1.0, bool IsPlayerCreated = false) override;
-
+	
 	/** Spawns item pickups for each item in the list. May compress pickups if too many entities. All pickups get the speed specified: */
 	virtual void SpawnItemPickups(const cItems & a_Pickups, double a_BlockX, double a_BlockY, double a_BlockZ, double a_SpeedX, double a_SpeedY, double a_SpeedZ, bool IsPlayerCreated = false) override;
-
+	
 	/** Spawns an falling block entity at the given position. It returns the UniqueID of the spawned falling block. */
 	int SpawnFallingBlock(int a_X, int a_Y, int a_Z, BLOCKTYPE BlockType, NIBBLETYPE BlockMeta);
 
@@ -486,10 +486,10 @@ public:
 
 	/** Replaces world blocks with a_Blocks, if they are of type a_FilterBlockType */
 	void ReplaceBlocks(const sSetBlockVector & a_Blocks, BLOCKTYPE a_FilterBlockType);
-
+	
 	/** Retrieves block types of the specified blocks. If a chunk is not loaded, doesn't modify the block. Returns true if all blocks were read. */
 	bool GetBlocks(sSetBlockVector & a_Blocks, bool a_ContinueOnFailure);
-
+	
 	// tolua_begin
 	bool DigBlock   (int a_X, int a_Y, int a_Z);
 	virtual void SendBlockTo(int a_X, int a_Y, int a_Z, cPlayer * a_Player) override;
@@ -500,21 +500,21 @@ public:
 
 	/** Wakes up the simulators for the specified block */
 	virtual void WakeUpSimulators(int a_BlockX, int a_BlockY, int a_BlockZ) override;
-
+	
 	/** Wakes up the simulators for the specified area of blocks */
 	void WakeUpSimulatorsInArea(int a_MinBlockX, int a_MaxBlockX, int a_MinBlockY, int a_MaxBlockY, int a_MinBlockZ, int a_MaxBlockZ);
 
 	// tolua_end
 
 	inline cSimulatorManager * GetSimulatorManager(void) { return m_SimulatorManager.get(); }
-
+	
 	inline cFluidSimulator * GetWaterSimulator(void) { return m_WaterSimulator; }
 	inline cFluidSimulator * GetLavaSimulator (void) { return m_LavaSimulator; }
 	inline cRedstoneSimulator<cChunk, cWorld> * GetRedstoneSimulator(void) { return m_RedstoneSimulator; }
-
+	
 	/** Calls the callback for each block entity in the specified chunk; returns true if all block entities processed, false if the callback aborted by returning true */
 	bool ForEachBlockEntityInChunk(int a_ChunkX, int a_ChunkZ, cBlockEntityCallback & a_Callback);  // Exported in ManualBindings.cpp
-
+	
 	/** Calls the callback for each chest in the specified chunk; returns true if all chests processed, false if the callback aborted by returning true */
 	bool ForEachChestInChunk(int a_ChunkX, int a_ChunkZ, cChestCallback & a_Callback);  // Exported in ManualBindings.cpp
 
@@ -529,7 +529,7 @@ public:
 
 	/** Calls the callback for each furnace in the specified chunk; returns true if all furnaces processed, false if the callback aborted by returning true */
 	bool ForEachFurnaceInChunk(int a_ChunkX, int a_ChunkZ, cFurnaceCallback & a_Callback);  // Exported in ManualBindings.cpp
-
+	
 	/** Does an explosion with the specified strength at the specified coordinate
 	a_SourceData exact type depends on the a_Source:
 	| esOther            | void *           |
@@ -580,29 +580,29 @@ public:
 
 	/** Retrieves the test on the sign at the specified coords; returns false if there's no sign at those coords, true if found */
 	bool GetSignLines (int a_BlockX, int a_BlockY, int a_BlockZ, AString & a_Line1, AString & a_Line2, AString & a_Line3, AString & a_Line4);  // Exported in ManualBindings.cpp
-
+	
 	/** a_Player is using block entity at [x, y, z], handle that: */
 	void UseBlockEntity(cPlayer * a_Player, int a_BlockX, int a_BlockY, int a_BlockZ) {m_ChunkMap->UseBlockEntity(a_Player, a_BlockX, a_BlockY, a_BlockZ); }  // tolua_export
-
+	
 	/** Calls the callback for the chunk specified, with ChunkMapCS locked; returns false if the chunk doesn't exist, otherwise returns the same value as the callback */
 	bool DoWithChunk(int a_ChunkX, int a_ChunkZ, cChunkCallback & a_Callback);
 
 	void GrowTreeImage(const sSetBlockVector & a_Blocks);
-
+	
 	// tolua_begin
 
 	/** Grows a tree at the specified coords, either from a sapling there, or based on the biome */
 	void GrowTree           (int a_BlockX, int a_BlockY, int a_BlockZ);
-
+	
 	/** Grows a tree at the specified coords, based on the sapling meta provided */
 	void GrowTreeFromSapling(int a_BlockX, int a_BlockY, int a_BlockZ, NIBBLETYPE a_SaplingMeta);
-
+	
 	/** Grows a tree at the specified coords, based on the biome in the place */
 	void GrowTreeByBiome    (int a_BlockX, int a_BlockY, int a_BlockZ);
-
+	
 	/** Grows the plant at the specified block to its ripe stage (bonemeal used); returns false if the block is not growable. If a_IsBonemeal is true, block is not grown if not allowed in world.ini */
 	bool GrowRipePlant(int a_BlockX, int a_BlockY, int a_BlockZ, bool a_IsByBonemeal = false);
-
+	
 	/** Grows a cactus present at the block specified by the amount of blocks specified, up to the max height specified in the config */
 	void GrowCactus(int a_BlockX, int a_BlockY, int a_BlockZ, int a_NumBlocksToGrow);
 
@@ -611,18 +611,18 @@ public:
 
 	/** Grows a sugarcane present at the block specified by the amount of blocks specified, up to the max height specified in the config */
 	void GrowSugarcane(int a_BlockX, int a_BlockY, int a_BlockZ, int a_NumBlocksToGrow);
-
+	
 	/** Returns the biome at the specified coords. Reads the biome from the chunk, if loaded, otherwise uses the world generator to provide the biome value */
 	EMCSBiome GetBiomeAt(int a_BlockX, int a_BlockZ);
-
+	
 	/** Sets the biome at the specified coords. Returns true if successful, false if not (chunk not loaded).
 	Doesn't resend the chunk to clients, use ForceSendChunkTo() for that. */
 	bool SetBiomeAt(int a_BlockX, int a_BlockZ, EMCSBiome a_Biome);
-
+	
 	/** Sets the biome at the area. Returns true if successful, false if any subarea failed (chunk not loaded).
 	(Re)sends the chunks to their relevant clients if successful. */
 	bool SetAreaBiome(int a_MinX, int a_MaxX, int a_MinZ, int a_MaxZ, EMCSBiome a_Biome);
-
+	
 	/** Sets the biome at the area. Returns true if successful, false if any subarea failed (chunk not loaded).
 	(Re)sends the chunks to their relevant clients if successful.
 	The cuboid needn't be sorted. */
@@ -630,7 +630,7 @@ public:
 
 	/** Returns the name of the world */
 	const AString & GetName(void) const { return m_WorldName; }
-
+	
 	/** Returns the name of the world.ini file used by this world */
 	const AString & GetIniFileName(void) const {return m_IniFileName; }
 
@@ -661,18 +661,18 @@ public:
 
 	AString GetLinkedOverworldName(void) const { return m_OverworldName; }
 	void SetLinkedOverworldName(const AString & a_Name) { m_OverworldName = a_Name; }
-
+	
 	// tolua_end
-
+	
 	/** Saves all chunks immediately. Dangerous interface, may deadlock, use QueueSaveAllChunks() instead */
 	void SaveAllChunks(void);
-
+	
 	/** Queues a task to save all chunks onto the tick thread. The prefferred way of saving chunks from external sources */
 	void QueueSaveAllChunks(void);  // tolua_export
-
+	
 	/** Queues a task onto the tick thread. The task object will be deleted once the task is finished */
 	void QueueTask(std::unique_ptr<cTask> a_Task);  // Exported in ManualBindings.cpp
-
+	
 	/** Queues a task onto the tick thread, with the specified delay.
 	The task object will be deleted once the task is finished */
 	void ScheduleTask(int a_DelayTicks, cTask * a_Task);
@@ -690,13 +690,13 @@ public:
 	inline size_t GetStorageSaveQueueLength(void) { return m_Storage.GetSaveQueueLength(); }    // tolua_export
 
 	void InitializeSpawn(void);
-
+	
 	/** Starts threads that belong to this world */
 	void Start(void);
-
+	
 	/** Stops threads that belong to this world (part of deinit) */
 	void Stop(void);
-
+	
 	/** Processes the blocks queued for ticking with a delay (m_BlockTickQueue[]) */
 	void TickQueuedBlocks(void);
 
@@ -714,34 +714,34 @@ public:
 	// tolua_begin
 	/** Casts a thunderbolt at the specified coords */
 	void CastThunderbolt(int a_BlockX, int a_BlockY, int a_BlockZ);
-
+	
 	/** Sets the specified weather; resets weather interval; asks and notifies plugins of the change */
 	void SetWeather(eWeather a_NewWeather);
-
+	
 	/** Forces a weather change in the next game tick */
 	void ChangeWeather(void);
-
+	
 	/** Returns the current weather. Instead of comparing values directly to the weather constants, use IsWeatherXXX() functions, if possible */
 	eWeather GetWeather(void) const { return m_Weather; }
-
+	
 	/** Returns true if the current weather is sun */
 	bool IsWeatherSunny(void) const { return (m_Weather == wSunny); }
-
+	
 	/** Returns true if it is sunny at the specified location. This takes into account biomes. */
 	bool IsWeatherSunnyAt(int a_BlockX, int a_BlockZ)
 	{
 		return (IsWeatherSunny() || IsBiomeNoDownfall(GetBiomeAt(a_BlockX, a_BlockZ)));
 	}
-
+	
 	/** Returns true if the current weather is rain */
 	bool IsWeatherRain(void) const { return (m_Weather == wRain); }
-
+	
 	/** Returns true if it is raining at the specified location. This takes into account biomes. */
 	bool IsWeatherRainAt(int a_BlockX, int a_BlockZ)
 	{
 		return (IsWeatherRain() && !IsBiomeNoDownfall(GetBiomeAt(a_BlockX, a_BlockZ)));
 	}
-
+	
 	/** Returns true if the current weather is stormy */
 	bool IsWeatherStorm(void) const { return (m_Weather == wStorm); }
 
@@ -750,10 +750,10 @@ public:
 	{
 		return (IsWeatherStorm() && !IsBiomeNoDownfall(GetBiomeAt(a_BlockX, a_BlockZ)));
 	}
-
+	
 	/** Returns true if the current weather has any precipitation - rain, storm or snow */
 	bool IsWeatherWet(void) const { return !IsWeatherSunny(); }
-
+	
 	/** Returns true if it is raining, stormy or snowing at the specified location. This takes into account biomes. */
 	virtual bool IsWeatherWetAt(int a_BlockX, int a_BlockZ)
 	{
@@ -765,33 +765,33 @@ public:
 	cChunkGenerator & GetGenerator(void) { return m_Generator; }
 	cWorldStorage &   GetStorage  (void) { return m_Storage; }
 	cChunkMap *       GetChunkMap (void) { return m_ChunkMap.get(); }
-
+		
 	/** Sets the blockticking to start at the specified block. Only one blocktick per chunk may be set, second call overwrites the first call */
 	void SetNextBlockTick(int a_BlockX, int a_BlockY, int a_BlockZ);  // tolua_export
-
+	
 	int GetMaxSugarcaneHeight(void) const { return m_MaxSugarcaneHeight; }  // tolua_export
 	int GetMaxCactusHeight   (void) const { return m_MaxCactusHeight; }     // tolua_export
 
 	bool IsBlockDirectlyWatered(int a_BlockX, int a_BlockY, int a_BlockZ);  // tolua_export
-
+	
 	/** Spawns a mob of the specified type. Returns the mob's EntityID if recognized and spawned, <0 otherwise */
 	virtual int SpawnMob(double a_PosX, double a_PosY, double a_PosZ, eMonsterType a_MonsterType) override;  // tolua_export
 	int SpawnMobFinalize(cMonster* a_Monster);
-
+	
 	/** Creates a projectile of the specified type. Returns the projectile's EntityID if successful, <0 otherwise
 	Item parameter used currently for Fireworks to correctly set entity metadata based on item metadata
 	*/
-	int CreateProjectile(double a_PosX, double a_PosY, double a_PosZ, cProjectileEntity::eKind a_Kind, cEntity * a_Creator, const cItem * a_Item, const Vector3d * a_Speed = NULL);  // tolua_export
-
+	int CreateProjectile(double a_PosX, double a_PosY, double a_PosZ, cProjectileEntity::eKind a_Kind, cEntity * a_Creator, const cItem * a_Item, const Vector3d * a_Speed = nullptr);  // tolua_export
+	
 	/** Returns a random number from the m_TickRand in range [0 .. a_Range]. To be used only in the tick thread! */
-	int GetTickRandomNumber(unsigned a_Range) { return static_cast<int>(m_TickRand.randInt(a_Range)); }
-
+	int GetTickRandomNumber(unsigned a_Range) { return (int)(m_TickRand.randInt(a_Range)); }
+	
 	/** Appends all usernames starting with a_Text (case-insensitive) into Results */
 	void TabCompleteUserName(const AString & a_Text, AStringVector & a_Results);
 
 	/** Get the current darkness level based on the time */
 	NIBBLETYPE GetSkyDarkness() { return m_SkyDarkness; }
-
+	
 	/** Increments (a_AlwaysTicked == true) or decrements (false) the m_AlwaysTicked counter for the specified chunk.
 	If the m_AlwaysTicked counter is greater than zero, the chunk is ticked in the tick-thread regardless of
 	whether it has any clients or not.
@@ -802,43 +802,43 @@ public:
 private:
 
 	friend class cRoot;
-
+	
 	class cTickThread :
 		public cIsThread
 	{
 		typedef cIsThread super;
 	public:
 		cTickThread(cWorld & a_World);
-
+		
 	protected:
 		cWorld & m_World;
-
+		
 		// cIsThread overrides:
 		virtual void Execute(void) override;
 	} ;
-
-
+	
+	
 	/** Implementation of the callbacks that the ChunkGenerator uses to store new chunks and interface to plugins */
 	class cChunkGeneratorCallbacks :
 		public cChunkGenerator::cChunkSink,
 		public cChunkGenerator::cPluginInterface
 	{
 		cWorld * m_World;
-
+		
 		// cChunkSink overrides:
 		virtual void OnChunkGenerated  (cChunkDesc & a_ChunkDesc) override;
 		virtual bool IsChunkValid      (int a_ChunkX, int a_ChunkZ) override;
 		virtual bool HasChunkAnyClients(int a_ChunkX, int a_ChunkZ) override;
 		virtual bool IsChunkQueued     (int a_ChunkX, int a_ChunkZ) override;
-
+		
 		// cPluginInterface overrides:
 		virtual void CallHookChunkGenerating(cChunkDesc & a_ChunkDesc) override;
 		virtual void CallHookChunkGenerated (cChunkDesc & a_ChunkDesc) override;
-
+		
 	public:
 		cChunkGeneratorCallbacks(cWorld & a_World);
 	} ;
-
+	
 
 	/** A container for tasks that have been scheduled for a specific game tick */
 	class cScheduledTask
@@ -846,18 +846,18 @@ private:
 	public:
 		Int64 m_TargetTick;
 		cTask * m_Task;
-
+		
 		/** Creates a new scheduled task; takes ownership of the task object passed to it. */
 		cScheduledTask(Int64 a_TargetTick, cTask * a_Task) :
 			m_TargetTick(a_TargetTick),
 			m_Task(a_Task)
 		{
 		}
-
+		
 		virtual ~cScheduledTask()
 		{
 			delete m_Task;
-			m_Task = NULL;
+			m_Task = nullptr;
 		}
 	};
 
@@ -873,15 +873,15 @@ private:
 	AString m_OverworldName;
 
 	AString m_IniFileName;
-
+	
 	/** Name of the storage schema used to load and save chunks */
 	AString m_StorageSchema;
-
+	
 	int m_StorageCompressionFactor;
-
+	
 	/** The dimension of the world, used by the client to provide correct lighting scheme */
 	eDimension m_Dimension;
-
+	
 	/** This random generator is to be used only in the Tick() method, and thus only in the World-Tick-thread (MTRand is not exactly thread-safe) */
 	MTRand m_TickRand;
 
@@ -910,7 +910,7 @@ private:
 	bool m_IsDeepSnowEnabled;
 	bool m_ShouldLavaSpawnFire;
 	bool m_VillagersShouldHarvestCrops;
-
+	
 	std::vector<BlockTickQueueItem *> m_BlockTickQueue;
 	std::vector<BlockTickQueueItem *> m_BlockTickQueueCopy;  // Second is for safely removing the objects from the queue
 
@@ -920,12 +920,12 @@ private:
 	cFluidSimulator *                    m_LavaSimulator;
 	std::unique_ptr<cFireSimulator>      m_FireSimulator;
 	cRedstoneSimulator<cChunk, cWorld> * m_RedstoneSimulator;
-
+	
 	cCriticalSection m_CSPlayers;
 	cPlayerList      m_Players;
 
 	cWorldStorage     m_Storage;
-
+	
 	unsigned int m_MaxPlayers;
 
 	std::unique_ptr<cChunkMap> m_ChunkMap;
@@ -935,7 +935,7 @@ private:
 
 	eWeather m_Weather;
 	int m_WeatherInterval;
-
+	
 	int  m_MaxCactusHeight;
 	int  m_MaxSugarcaneHeight;
 	bool m_IsCactusBonemealable;
@@ -952,7 +952,7 @@ private:
 
 	/** Whether command blocks are enabled or not */
 	bool m_bCommandBlocksEnabled;
-
+	
 	/** Whether prefixes such as [INFO] are prepended to SendMessageXXX() / BroadcastChatXXX() functions */
 	bool m_bUseChatPrefixes;
 
@@ -966,43 +966,43 @@ private:
 
 	/** Name of the end world */
 	AString m_EndWorldName;
-
+	
 
 	cChunkGenerator  m_Generator;
 
 	cScoreboard      m_Scoreboard;
 	cMapManager      m_MapManager;
-
+	
 	/** The callbacks that the ChunkGenerator uses to store new chunks and interface to plugins */
 	cChunkGeneratorCallbacks m_GeneratorCallbacks;
-
+	
 	cChunkSender     m_ChunkSender;
 	cLightingThread  m_Lighting;
 	cTickThread      m_TickThread;
-
+	
 	/** Guards the m_Tasks */
 	cCriticalSection m_CSTasks;
-
+	
 	/** Tasks that have been queued onto the tick thread; guarded by m_CSTasks */
 	cTasks m_Tasks;
-
+	
 	/** Guards the m_ScheduledTasks */
 	cCriticalSection m_CSScheduledTasks;
-
+	
 	/** Tasks that have been queued to be executed on the tick thread at target tick in the future.
 	Ordered by increasing m_TargetTick.
 	Guarded by m_CSScheduledTasks */
 	cScheduledTasks m_ScheduledTasks;
-
+	
 	/** Guards m_Clients */
 	cCriticalSection  m_CSClients;
-
+	
 	/** List of clients in this world, these will be ticked by this world */
 	cClientHandleList m_Clients;
-
+	
 	/** Clients that are scheduled for removal (ticked in another world), waiting for TickClients() to remove them */
 	cClientHandleList m_ClientsToRemove;
-
+	
 	/** Clients that are scheduled for adding, waiting for TickClients to add them */
 	cClientHandleList m_ClientsToAdd;
 
@@ -1017,10 +1017,10 @@ private:
 
 	/** List of players that are scheduled for adding, waiting for the Tick thread to add them. */
 	cPlayerList m_PlayersToAdd;
-
+	
 	/** CS protecting m_SetChunkDataQueue. */
 	cCriticalSection m_CSSetChunkDataQueue;
-
+	
 	/** Queue for the chunk data to be set into m_ChunkMap by the tick thread. Protected by m_CSSetChunkDataQueue */
 	cSetChunkDataPtrs m_SetChunkDataQueue;
 
@@ -1032,16 +1032,16 @@ private:
 
 	/** Handles the weather in each tick */
 	void TickWeather(float a_Dt);
-
+	
 	/** Handles the mob spawning/moving/destroying each tick */
 	void TickMobs(float a_Dt);
-
+	
 	/** Executes all tasks queued onto the tick thread */
 	void TickQueuedTasks(void);
-
+	
 	/** Executes all tasks queued onto the tick thread */
 	void TickScheduledTasks(void);
-
+	
 	/** Ticks all clients that are in this world */
 	void TickClients(float a_Dt);
 
@@ -1077,3 +1077,7 @@ private:
 	void SetChunkData(cSetChunkData & a_SetChunkData);
 
 };  // tolua_export
+
+
+
+
diff --git a/src/WorldStorage/NBTChunkSerializer.cpp b/src/WorldStorage/NBTChunkSerializer.cpp
index 80d9ab6d2..d85a5c329 100644
--- a/src/WorldStorage/NBTChunkSerializer.cpp
+++ b/src/WorldStorage/NBTChunkSerializer.cpp
@@ -467,7 +467,7 @@ void cNBTChunkSerializer::AddMinecartEntity(cMinecart * a_Minecart)
 
 void cNBTChunkSerializer::AddMonsterEntity(cMonster * a_Monster)
 {
-	const char * EntityClass = NULL;
+	const char * EntityClass = nullptr;
 	switch (a_Monster->GetMobType())
 	{
 		case mtBat:           EntityClass = "Bat";            break;
diff --git a/src/WorldStorage/ScoreboardSerializer.cpp b/src/WorldStorage/ScoreboardSerializer.cpp
index e30eecf67..404604382 100644
--- a/src/WorldStorage/ScoreboardSerializer.cpp
+++ b/src/WorldStorage/ScoreboardSerializer.cpp
@@ -174,13 +174,13 @@ void cScoreboardSerializer::SaveScoreboardToNBT(cFastNBTWriter & a_Writer)
 	a_Writer.BeginCompound("DisplaySlots");
 
 	cObjective * Objective = m_ScoreBoard->GetObjectiveIn(cScoreboard::dsList);
-	a_Writer.AddString("slot_0", (Objective == NULL) ? "" : Objective->GetName());
+	a_Writer.AddString("slot_0", (Objective == nullptr) ? "" : Objective->GetName());
 
 	Objective = m_ScoreBoard->GetObjectiveIn(cScoreboard::dsSidebar);
-	a_Writer.AddString("slot_1", (Objective == NULL) ? "" : Objective->GetName());
+	a_Writer.AddString("slot_1", (Objective == nullptr) ? "" : Objective->GetName());
 
 	Objective = m_ScoreBoard->GetObjectiveIn(cScoreboard::dsName);
-	a_Writer.AddString("slot_2", (Objective == NULL) ? "" : Objective->GetName());
+	a_Writer.AddString("slot_2", (Objective == nullptr) ? "" : Objective->GetName());
 
 	a_Writer.EndCompound();  // DisplaySlots
 
diff --git a/src/WorldStorage/WSSAnvil.cpp b/src/WorldStorage/WSSAnvil.cpp
index 8ebcff936..af7551ee4 100644
--- a/src/WorldStorage/WSSAnvil.cpp
+++ b/src/WorldStorage/WSSAnvil.cpp
@@ -126,7 +126,7 @@ cWSSAnvil::cWSSAnvil(cWorld * a_World, int a_CompressionFactor) :
 		#endif  // _DEBUG
 		
 		gzFile gz = gzopen((FILE_IO_PREFIX + fnam).c_str(), "wb");
-		if (gz != NULL)
+		if (gz != nullptr)
 		{
 			gzwrite(gz, Writer.GetResult().data(), (unsigned)Writer.GetResult().size());
 		}
@@ -193,7 +193,7 @@ bool cWSSAnvil::GetChunkData(const cChunkCoords & a_Chunk, AString & a_Data)
 {
 	cCSLock Lock(m_CS);
 	cMCAFile * File = LoadMCAFile(a_Chunk);
-	if (File == NULL)
+	if (File == nullptr)
 	{
 		return false;
 	}
@@ -208,7 +208,7 @@ bool cWSSAnvil::SetChunkData(const cChunkCoords & a_Chunk, const AString & a_Dat
 {
 	cCSLock Lock(m_CS);
 	cMCAFile * File = LoadMCAFile(a_Chunk);
-	if (File == NULL)
+	if (File == nullptr)
 	{
 		return false;
 	}
@@ -234,7 +234,7 @@ cWSSAnvil::cMCAFile * cWSSAnvil::LoadMCAFile(const cChunkCoords & a_Chunk)
 	// Is it already cached?
 	for (cMCAFiles::iterator itr = m_Files.begin(); itr != m_Files.end(); ++itr)
 	{
-		if (((*itr) != NULL) && ((*itr)->GetRegionX() == RegionX) && ((*itr)->GetRegionZ() == RegionZ))
+		if (((*itr) != nullptr) && ((*itr)->GetRegionX() == RegionX) && ((*itr)->GetRegionZ() == RegionZ))
 		{
 			// Move the file to front and return it:
 			cMCAFile * f = *itr;
@@ -253,9 +253,9 @@ cWSSAnvil::cMCAFile * cWSSAnvil::LoadMCAFile(const cChunkCoords & a_Chunk)
 	cFile::CreateFolder(FILE_IO_PREFIX + FileName);
 	AppendPrintf(FileName, "/r.%d.%d.mca", RegionX, RegionZ);
 	cMCAFile * f = new cMCAFile(FileName, RegionX, RegionZ);
-	if (f == NULL)
+	if (f == nullptr)
 	{
-		return NULL;
+		return nullptr;
 	}
 	m_Files.push_front(f);
 	
@@ -373,7 +373,7 @@ bool cWSSAnvil::LoadChunkFromNBT(const cChunkCoords & a_Chunk, const cParsedNBT
 	// Load the biomes from NBT, if present and valid. First try MCS-style, then Vanilla-style:
 	cChunkDef::BiomeMap BiomeMap;
 	cChunkDef::BiomeMap * Biomes = LoadBiomeMapFromNBT(&BiomeMap, a_NBT, a_NBT.FindChildByName(Level, "MCSBiomes"));
-	if (Biomes == NULL)
+	if (Biomes == nullptr)
 	{
 		// MCS-style biomes not available, load vanilla-style:
 		Biomes = LoadVanillaBiomeMapFromNBT(&BiomeMap, a_NBT, a_NBT.FindChildByName(Level, "Biomes"));
@@ -426,9 +426,9 @@ bool cWSSAnvil::LoadChunkFromNBT(const cChunkCoords & a_Chunk, const cParsedNBT
 	cSetChunkDataPtr SetChunkData(new cSetChunkData(
 		a_Chunk.m_ChunkX, a_Chunk.m_ChunkZ,
 		BlockTypes, MetaData,
-		IsLightValid ? BlockLight : NULL,
-		IsLightValid ? SkyLight : NULL,
-		NULL, Biomes,
+		IsLightValid ? BlockLight : nullptr,
+		IsLightValid ? SkyLight : nullptr,
+		nullptr, Biomes,
 		Entities, BlockEntities,
 		false
 	));
@@ -525,12 +525,12 @@ cChunkDef::BiomeMap * cWSSAnvil::LoadVanillaBiomeMapFromNBT(cChunkDef::BiomeMap
 {
 	if ((a_TagIdx < 0) || (a_NBT.GetType(a_TagIdx) != TAG_ByteArray))
 	{
-		return NULL;
+		return nullptr;
 	}
 	if (a_NBT.GetDataLength(a_TagIdx) != 16 * 16)
 	{
 		// The biomes stored don't match in size
-		return NULL;
+		return nullptr;
 	}
 	const unsigned char * VanillaBiomeData = (const unsigned char *)(a_NBT.GetData(a_TagIdx));
 	for (size_t i = 0; i < ARRAYCOUNT(*a_BiomeMap); i++)
@@ -538,7 +538,7 @@ cChunkDef::BiomeMap * cWSSAnvil::LoadVanillaBiomeMapFromNBT(cChunkDef::BiomeMap
 		if ((VanillaBiomeData)[i] == 0xff)
 		{
 			// Unassigned biomes
-			return NULL;
+			return nullptr;
 		}
 		(*a_BiomeMap)[i] = (EMCSBiome)(VanillaBiomeData[i]);
 	}
@@ -553,12 +553,12 @@ cChunkDef::BiomeMap * cWSSAnvil::LoadBiomeMapFromNBT(cChunkDef::BiomeMap * a_Bio
 {
 	if ((a_TagIdx < 0) || (a_NBT.GetType(a_TagIdx) != TAG_IntArray))
 	{
-		return NULL;
+		return nullptr;
 	}
 	if (a_NBT.GetDataLength(a_TagIdx) != sizeof(*a_BiomeMap))
 	{
 		// The biomes stored don't match in size
-		return NULL;
+		return nullptr;
 	}
 	const char * BiomeData = (a_NBT.GetData(a_TagIdx));
 	for (size_t i = 0; i < ARRAYCOUNT(*a_BiomeMap); i++)
@@ -567,7 +567,7 @@ cChunkDef::BiomeMap * cWSSAnvil::LoadBiomeMapFromNBT(cChunkDef::BiomeMap * a_Bio
 		if ((*a_BiomeMap)[i] == 0xff)
 		{
 			// Unassigned biomes
-			return NULL;
+			return nullptr;
 		}
 	}
 	return a_BiomeMap;
@@ -631,7 +631,7 @@ void cWSSAnvil::LoadBlockEntitiesFromNBT(cBlockEntityList & a_BlockEntities, con
 		BLOCKTYPE BlockType = cChunkDef::GetBlock(a_BlockTypes, RelX, RelY, RelZ);
 		NIBBLETYPE BlockMeta = cChunkDef::GetNibble(a_BlockMetas, RelX, RelY, RelZ);
 		std::auto_ptr<cBlockEntity> be(LoadBlockEntityFromNBT(a_NBT, Child, x, y, z, BlockType, BlockMeta));
-		if (be.get() == NULL)
+		if (be.get() == nullptr)
 		{
 			continue;
 		}
@@ -670,7 +670,7 @@ cBlockEntity * cWSSAnvil::LoadBlockEntityFromNBT(const cParsedNBT & a_NBT, int a
 		case E_BLOCK_WALLSIGN:      return LoadSignFromNBT        (a_NBT, a_Tag, a_BlockX, a_BlockY, a_BlockZ, E_BLOCK_WALLSIGN);
 
 		// Blocktypes that have block entities but don't load their contents from disk:
-		case E_BLOCK_ENDER_CHEST:   return NULL;
+		case E_BLOCK_ENDER_CHEST:   return nullptr;
 	}
 
 	// All the other blocktypes should have no entities assigned to them. Report an error:
@@ -686,7 +686,7 @@ cBlockEntity * cWSSAnvil::LoadBlockEntityFromNBT(const cParsedNBT & a_NBT, int a
 		ItemTypeToString(a_BlockType).c_str(), a_BlockType, TypeName.c_str(),
 		a_BlockX, a_BlockY, a_BlockZ
 	);
-	return NULL;
+	return nullptr;
 }
 
 
@@ -836,7 +836,7 @@ cBlockEntity * cWSSAnvil::LoadBeaconFromNBT(const cParsedNBT & a_NBT, int a_TagI
 	// Check if the data has a proper type:
 	if (!CheckBlockEntityType(a_NBT, a_TagIdx, "Beacon"))
 	{
-		return NULL;
+		return nullptr;
 	}
 
 	std::auto_ptr<cBeaconEntity> Beacon(new cBeaconEntity(a_BlockX, a_BlockY, a_BlockZ, m_World));
@@ -881,13 +881,13 @@ cBlockEntity * cWSSAnvil::LoadChestFromNBT(const cParsedNBT & a_NBT, int a_TagId
 	//       https://github.com/mc-server/MCServer/blob/d0551e2e0a98a28f31a88d489d17b408e4a7d38d/src/WorldStorage/WSSAnvil.cpp#L637
 	if (!CheckBlockEntityType(a_NBT, a_TagIdx, "Chest") && !CheckBlockEntityType(a_NBT, a_TagIdx, "TrappedChest"))
 	{
-		return NULL;
+		return nullptr;
 	}
 
 	int Items = a_NBT.FindChildByName(a_TagIdx, "Items");
 	if ((Items < 0) || (a_NBT.GetType(Items) != TAG_List))
 	{
-		return NULL;  // Make it an empty chest - the chunk loader will provide an empty cChestEntity for this
+		return nullptr;  // Make it an empty chest - the chunk loader will provide an empty cChestEntity for this
 	}
 	std::auto_ptr<cChestEntity> Chest(new cChestEntity(a_BlockX, a_BlockY, a_BlockZ, m_World, a_ChestBlockType));
 	LoadItemGridFromNBT(Chest->GetContents(), a_NBT, Items);
@@ -903,7 +903,7 @@ cBlockEntity * cWSSAnvil::LoadCommandBlockFromNBT(const cParsedNBT & a_NBT, int
 	// Check if the data has a proper type:
 	if (!CheckBlockEntityType(a_NBT, a_TagIdx, "Control"))
 	{
-		return NULL;
+		return nullptr;
 	}
 
 	std::auto_ptr<cCommandBlockEntity> CmdBlock(new cCommandBlockEntity(a_BlockX, a_BlockY, a_BlockZ, m_World));
@@ -940,13 +940,13 @@ cBlockEntity * cWSSAnvil::LoadDispenserFromNBT(const cParsedNBT & a_NBT, int a_T
 	// Check if the data has a proper type:
 	if (!CheckBlockEntityType(a_NBT, a_TagIdx, "Trap"))
 	{
-		return NULL;
+		return nullptr;
 	}
 
 	int Items = a_NBT.FindChildByName(a_TagIdx, "Items");
 	if ((Items < 0) || (a_NBT.GetType(Items) != TAG_List))
 	{
-		return NULL;  // Make it an empty dispenser - the chunk loader will provide an empty cDispenserEntity for this
+		return nullptr;  // Make it an empty dispenser - the chunk loader will provide an empty cDispenserEntity for this
 	}
 	std::auto_ptr<cDispenserEntity> Dispenser(new cDispenserEntity(a_BlockX, a_BlockY, a_BlockZ, m_World));
 	LoadItemGridFromNBT(Dispenser->GetContents(), a_NBT, Items);
@@ -962,13 +962,13 @@ cBlockEntity * cWSSAnvil::LoadDropperFromNBT(const cParsedNBT & a_NBT, int a_Tag
 	// Check if the data has a proper type:
 	if (!CheckBlockEntityType(a_NBT, a_TagIdx, "Dropper"))
 	{
-		return NULL;
+		return nullptr;
 	}
 
 	int Items = a_NBT.FindChildByName(a_TagIdx, "Items");
 	if ((Items < 0) || (a_NBT.GetType(Items) != TAG_List))
 	{
-		return NULL;  // Make it an empty dropper - the chunk loader will provide an empty cDropperEntity for this
+		return nullptr;  // Make it an empty dropper - the chunk loader will provide an empty cDropperEntity for this
 	}
 	std::auto_ptr<cDropperEntity> Dropper(new cDropperEntity(a_BlockX, a_BlockY, a_BlockZ, m_World));
 	LoadItemGridFromNBT(Dropper->GetContents(), a_NBT, Items);
@@ -984,7 +984,7 @@ cBlockEntity * cWSSAnvil::LoadFlowerPotFromNBT(const cParsedNBT & a_NBT, int a_T
 	// Check if the data has a proper type:
 	if (!CheckBlockEntityType(a_NBT, a_TagIdx, "FlowerPot"))
 	{
-		return NULL;
+		return nullptr;
 	}
 
 	std::auto_ptr<cFlowerPotEntity> FlowerPot(new cFlowerPotEntity(a_BlockX, a_BlockY, a_BlockZ, m_World));
@@ -1015,13 +1015,13 @@ cBlockEntity * cWSSAnvil::LoadFurnaceFromNBT(const cParsedNBT & a_NBT, int a_Tag
 	// Check if the data has a proper type:
 	if (!CheckBlockEntityType(a_NBT, a_TagIdx, "Furnace"))
 	{
-		return NULL;
+		return nullptr;
 	}
 
 	int Items = a_NBT.FindChildByName(a_TagIdx, "Items");
 	if ((Items < 0) || (a_NBT.GetType(Items) != TAG_List))
 	{
-		return NULL;  // Make it an empty furnace - the chunk loader will provide an empty cFurnaceEntity for this
+		return nullptr;  // Make it an empty furnace - the chunk loader will provide an empty cFurnaceEntity for this
 	}
 	
 	std::auto_ptr<cFurnaceEntity> Furnace(new cFurnaceEntity(a_BlockX, a_BlockY, a_BlockZ, a_BlockType, a_BlockMeta, m_World));
@@ -1073,13 +1073,13 @@ cBlockEntity * cWSSAnvil::LoadHopperFromNBT(const cParsedNBT & a_NBT, int a_TagI
 	// Check if the data has a proper type:
 	if (!CheckBlockEntityType(a_NBT, a_TagIdx, "Hopper"))
 	{
-		return NULL;
+		return nullptr;
 	}
 
 	int Items = a_NBT.FindChildByName(a_TagIdx, "Items");
 	if ((Items < 0) || (a_NBT.GetType(Items) != TAG_List))
 	{
-		return NULL;  // Make it an empty hopper - the chunk loader will provide an empty cHopperEntity for this
+		return nullptr;  // Make it an empty hopper - the chunk loader will provide an empty cHopperEntity for this
 	}
 	std::auto_ptr<cHopperEntity> Hopper(new cHopperEntity(a_BlockX, a_BlockY, a_BlockZ, m_World));
 	LoadItemGridFromNBT(Hopper->GetContents(), a_NBT, Items);
@@ -1095,7 +1095,7 @@ cBlockEntity * cWSSAnvil::LoadJukeboxFromNBT(const cParsedNBT & a_NBT, int a_Tag
 	// Check if the data has a proper type:
 	if (!CheckBlockEntityType(a_NBT, a_TagIdx, "RecordPlayer"))
 	{
-		return NULL;
+		return nullptr;
 	}
 
 	std::auto_ptr<cJukeboxEntity> Jukebox(new cJukeboxEntity(a_BlockX, a_BlockY, a_BlockZ, m_World));
@@ -1116,7 +1116,7 @@ cBlockEntity * cWSSAnvil::LoadMobHeadFromNBT(const cParsedNBT & a_NBT, int a_Tag
 	// Check if the data has a proper type:
 	if (!CheckBlockEntityType(a_NBT, a_TagIdx, "Skull"))
 	{
-		return NULL;
+		return nullptr;
 	}
 
 	std::auto_ptr<cMobHeadEntity> MobHead(new cMobHeadEntity(a_BlockX, a_BlockY, a_BlockZ, m_World));
@@ -1151,7 +1151,7 @@ cBlockEntity * cWSSAnvil::LoadNoteBlockFromNBT(const cParsedNBT & a_NBT, int a_T
 	// Check if the data has a proper type:
 	if (!CheckBlockEntityType(a_NBT, a_TagIdx, "Music"))
 	{
-		return NULL;
+		return nullptr;
 	}
 
 	std::auto_ptr<cNoteEntity> NoteBlock(new cNoteEntity(a_BlockX, a_BlockY, a_BlockZ, m_World));
@@ -1172,7 +1172,7 @@ cBlockEntity * cWSSAnvil::LoadSignFromNBT(const cParsedNBT & a_NBT, int a_TagIdx
 	// Check if the data has a proper type:
 	if (!CheckBlockEntityType(a_NBT, a_TagIdx, "Sign"))
 	{
-		return NULL;
+		return nullptr;
 	}
 
 	std::auto_ptr<cSignEntity> Sign(new cSignEntity(a_BlockType, a_BlockX, a_BlockY, a_BlockZ, m_World));
@@ -1755,7 +1755,7 @@ void cWSSAnvil::LoadItemFrameFromNBT(cEntityList & a_Entities, const cParsedNBT
 
 void cWSSAnvil::LoadArrowFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx)
 {
-	std::auto_ptr<cArrowEntity> Arrow(new cArrowEntity(NULL, 0, 0, 0, Vector3d(0, 0, 0)));
+	std::auto_ptr<cArrowEntity> Arrow(new cArrowEntity(nullptr, 0, 0, 0, Vector3d(0, 0, 0)));
 	if (!LoadProjectileBaseFromNBT(*Arrow.get(), a_NBT, a_TagIdx))
 	{
 		return;
@@ -1819,7 +1819,7 @@ void cWSSAnvil::LoadArrowFromNBT(cEntityList & a_Entities, const cParsedNBT & a_
 
 void cWSSAnvil::LoadSplashPotionFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx)
 {
-	std::auto_ptr<cSplashPotionEntity> SplashPotion(new cSplashPotionEntity(NULL, 0, 0, 0, Vector3d(0, 0, 0), cItem()));
+	std::auto_ptr<cSplashPotionEntity> SplashPotion(new cSplashPotionEntity(nullptr, 0, 0, 0, Vector3d(0, 0, 0), cItem()));
 	if (!LoadProjectileBaseFromNBT(*SplashPotion.get(), a_NBT, a_TagIdx))
 	{
 		return;
@@ -1843,7 +1843,7 @@ void cWSSAnvil::LoadSplashPotionFromNBT(cEntityList & a_Entities, const cParsedN
 
 void cWSSAnvil::LoadSnowballFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx)
 {
-	std::auto_ptr<cThrownSnowballEntity> Snowball(new cThrownSnowballEntity(NULL, 0, 0, 0, Vector3d(0, 0, 0)));
+	std::auto_ptr<cThrownSnowballEntity> Snowball(new cThrownSnowballEntity(nullptr, 0, 0, 0, Vector3d(0, 0, 0)));
 	if (!LoadProjectileBaseFromNBT(*Snowball.get(), a_NBT, a_TagIdx))
 	{
 		return;
@@ -1859,7 +1859,7 @@ void cWSSAnvil::LoadSnowballFromNBT(cEntityList & a_Entities, const cParsedNBT &
 
 void cWSSAnvil::LoadEggFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx)
 {
-	std::auto_ptr<cThrownEggEntity> Egg(new cThrownEggEntity(NULL, 0, 0, 0, Vector3d(0, 0, 0)));
+	std::auto_ptr<cThrownEggEntity> Egg(new cThrownEggEntity(nullptr, 0, 0, 0, Vector3d(0, 0, 0)));
 	if (!LoadProjectileBaseFromNBT(*Egg.get(), a_NBT, a_TagIdx))
 	{
 		return;
@@ -1875,7 +1875,7 @@ void cWSSAnvil::LoadEggFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NB
 
 void cWSSAnvil::LoadFireballFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx)
 {
-	std::auto_ptr<cGhastFireballEntity> Fireball(new cGhastFireballEntity(NULL, 0, 0, 0, Vector3d(0, 0, 0)));
+	std::auto_ptr<cGhastFireballEntity> Fireball(new cGhastFireballEntity(nullptr, 0, 0, 0, Vector3d(0, 0, 0)));
 	if (!LoadProjectileBaseFromNBT(*Fireball.get(), a_NBT, a_TagIdx))
 	{
 		return;
@@ -1891,7 +1891,7 @@ void cWSSAnvil::LoadFireballFromNBT(cEntityList & a_Entities, const cParsedNBT &
 
 void cWSSAnvil::LoadFireChargeFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx)
 {
-	std::auto_ptr<cFireChargeEntity> FireCharge(new cFireChargeEntity(NULL, 0, 0, 0, Vector3d(0, 0, 0)));
+	std::auto_ptr<cFireChargeEntity> FireCharge(new cFireChargeEntity(nullptr, 0, 0, 0, Vector3d(0, 0, 0)));
 	if (!LoadProjectileBaseFromNBT(*FireCharge.get(), a_NBT, a_TagIdx))
 	{
 		return;
@@ -1907,7 +1907,7 @@ void cWSSAnvil::LoadFireChargeFromNBT(cEntityList & a_Entities, const cParsedNBT
 
 void cWSSAnvil::LoadThrownEnderpearlFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx)
 {
-	std::auto_ptr<cThrownEnderPearlEntity> Enderpearl(new cThrownEnderPearlEntity(NULL, 0, 0, 0, Vector3d(0, 0, 0)));
+	std::auto_ptr<cThrownEnderPearlEntity> Enderpearl(new cThrownEnderPearlEntity(nullptr, 0, 0, 0, Vector3d(0, 0, 0)));
 	if (!LoadProjectileBaseFromNBT(*Enderpearl.get(), a_NBT, a_TagIdx))
 	{
 		return;
@@ -2864,7 +2864,7 @@ bool cWSSAnvil::cMCAFile::OpenFile(bool a_IsForReading)
 	if (m_File.Read(m_Header, sizeof(m_Header)) != sizeof(m_Header))
 	{
 		// Cannot read the header - perhaps the file has just been created?
-		// Try writing a NULL header (both chunk offsets and timestamps):
+		// Try writing a nullptr header (both chunk offsets and timestamps):
 		memset(m_Header, 0, sizeof(m_Header));
 		if (
 			(m_File.Write(m_Header, sizeof(m_Header)) != sizeof(m_Header)) ||  // Real header - chunk offsets
diff --git a/src/WorldStorage/WSSAnvil.h b/src/WorldStorage/WSSAnvil.h
index 591ec6757..9c579a617 100644
--- a/src/WorldStorage/WSSAnvil.h
+++ b/src/WorldStorage/WSSAnvil.h
@@ -113,10 +113,10 @@ protected:
 	/// Saves the chunk into NBT data using a_Writer; returns true on success
 	bool SaveChunkToNBT(const cChunkCoords & a_Chunk, cFastNBTWriter & a_Writer);
 	
-	/// Loads the chunk's biome map from vanilla-format; returns a_BiomeMap if biomes present and valid, NULL otherwise
+	/// Loads the chunk's biome map from vanilla-format; returns a_BiomeMap if biomes present and valid, nullptr otherwise
 	cChunkDef::BiomeMap * LoadVanillaBiomeMapFromNBT(cChunkDef::BiomeMap * a_BiomeMap, const cParsedNBT & a_NBT, int a_TagIdx);
 	
-	/// Loads the chunk's biome map from MCS format; returns a_BiomeMap if biomes present and valid, NULL otherwise
+	/// Loads the chunk's biome map from MCS format; returns a_BiomeMap if biomes present and valid, nullptr otherwise
 	cChunkDef::BiomeMap * LoadBiomeMapFromNBT(cChunkDef::BiomeMap * a_BiomeMap, const cParsedNBT & a_NBT, int a_TagIdx);
 	
 	/// Loads the chunk's entities from NBT data (a_Tag is the Level\\Entities list tag; may be -1)
@@ -126,7 +126,7 @@ protected:
 	void LoadBlockEntitiesFromNBT(cBlockEntityList & a_BlockEntitites, const cParsedNBT & a_NBT, int a_Tag, BLOCKTYPE * a_BlockTypes, NIBBLETYPE * a_BlockMetas);
 	
 	/** Loads the data for a block entity from the specified NBT tag.
-	Returns the loaded block entity, or NULL upon failure. */
+	Returns the loaded block entity, or nullptr upon failure. */
 	cBlockEntity * LoadBlockEntityFromNBT(const cParsedNBT & a_NBT, int a_Tag, int a_BlockX, int a_BlockY, int a_BlockZ, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta);
 
 	/// Loads a cItem contents from the specified NBT tag; returns true if successful. Doesn't load the Slot tag
diff --git a/src/WorldStorage/WorldStorage.cpp b/src/WorldStorage/WorldStorage.cpp
index c611bfd90..31318ee67 100644
--- a/src/WorldStorage/WorldStorage.cpp
+++ b/src/WorldStorage/WorldStorage.cpp
@@ -39,8 +39,8 @@ protected:
 
 cWorldStorage::cWorldStorage(void) :
 	super("cWorldStorage"),
-	m_World(NULL),
-	m_SaveSchema(NULL)
+	m_World(nullptr),
+	m_SaveSchema(nullptr)
 {
 }
 
diff --git a/src/XMLParser.h b/src/XMLParser.h
index e39405529..5b53e55cf 100644
--- a/src/XMLParser.h
+++ b/src/XMLParser.h
@@ -68,7 +68,7 @@ protected:
 3, Create an instance of your class:
 	CMyParser Parser;
 4, Call Create():
-	Parser.Create(NULL, NULL);
+	Parser.Create(nullptr, nullptr);
 4, Call Parse(), repeatedly:
 	Parser.Parse(Buffer, Length);
 */
@@ -84,7 +84,7 @@ public:
 
 	CExpatImpl ()
 	{
-		m_p = NULL;
+		m_p = nullptr;
 	}
 
 	// @cmember Destructor
@@ -99,24 +99,24 @@ public:
 
 	// @cmember Create a parser
 
-	bool Create (const XML_Char * pszEncoding = NULL, const XML_Char * pszSep = NULL)
+	bool Create (const XML_Char * pszEncoding = nullptr, const XML_Char * pszSep = nullptr)
 	{
 		// Destroy the old parser
 		Destroy ();
 
-		// If the encoding or seperator are empty, then NULL
-		if (pszEncoding != NULL && pszEncoding [0] == 0)
+		// If the encoding or seperator are empty, then nullptr
+		if (pszEncoding != nullptr && pszEncoding [0] == 0)
 		{
-			pszEncoding = NULL;
+			pszEncoding = nullptr;
 		}
-		if (pszSep != NULL && pszSep [0] == 0)
+		if (pszSep != nullptr && pszSep [0] == 0)
 		{
-			pszSep = NULL;
+			pszSep = nullptr;
 		}
 
 		// Create the new parser
-		m_p = XML_ParserCreate_MM (pszEncoding, NULL, pszSep);
-		if (m_p == NULL)
+		m_p = XML_ParserCreate_MM (pszEncoding, nullptr, pszSep);
+		if (m_p == nullptr)
 		{
 			return false;
 		}
@@ -134,11 +134,11 @@ public:
 
 	void Destroy (void)
 	{
-		if (m_p != NULL)
+		if (m_p != nullptr)
 		{
 			XML_ParserFree (m_p);
 		}
-		m_p = NULL;
+		m_p = nullptr;
 	}
 
 
@@ -146,7 +146,7 @@ public:
 
 	bool Parse (const char *pszBuffer, int nLength, bool fIsFinal = true)
 	{
-		assert (m_p != NULL);
+		assert (m_p != nullptr);
 		return XML_Parse (m_p, pszBuffer, nLength, fIsFinal) != 0;
 	}
 
@@ -154,7 +154,7 @@ public:
 
 	bool ParseBuffer (int nLength, bool fIsFinal = true)
 	{
-		assert (m_p != NULL);
+		assert (m_p != nullptr);
 		return XML_ParseBuffer (m_p, nLength, fIsFinal) != 0;
 	}
 
@@ -162,7 +162,7 @@ public:
 
 	void *GetBuffer (int nLength)
 	{
-		assert (m_p != NULL);
+		assert (m_p != nullptr);
 		return XML_GetBuffer (m_p, nLength);
 	}
 
@@ -174,23 +174,23 @@ protected:
 
 	void EnableStartElementHandler (bool fEnable = true)
 	{
-		assert (m_p != NULL);
-		XML_SetStartElementHandler (m_p, fEnable ? StartElementHandler : NULL);
+		assert (m_p != nullptr);
+		XML_SetStartElementHandler (m_p, fEnable ? StartElementHandler : nullptr);
 	}
 
 	// @cmember Enable/Disable the end element handler
 
 	void EnableEndElementHandler (bool fEnable = true)
 	{
-		assert (m_p != NULL);
-		XML_SetEndElementHandler (m_p, fEnable ? EndElementHandler : NULL);
+		assert (m_p != nullptr);
+		XML_SetEndElementHandler (m_p, fEnable ? EndElementHandler : nullptr);
 	}
 
 	// @cmember Enable/Disable the element handlers
 
 	void EnableElementHandler (bool fEnable = true)
 	{
-		assert (m_p != NULL);
+		assert (m_p != nullptr);
 		EnableStartElementHandler (fEnable);
 		EnableEndElementHandler (fEnable);
 	}
@@ -199,47 +199,47 @@ protected:
 
 	void EnableCharacterDataHandler (bool fEnable = true)
 	{
-		assert (m_p != NULL);
-		XML_SetCharacterDataHandler (m_p, fEnable ? CharacterDataHandler : NULL);
+		assert (m_p != nullptr);
+		XML_SetCharacterDataHandler (m_p, fEnable ? CharacterDataHandler : nullptr);
 	}
 
 	// @cmember Enable/Disable the processing instruction handler
 
 	void EnableProcessingInstructionHandler (bool fEnable = true)
 	{
-		assert (m_p != NULL);
-		XML_SetProcessingInstructionHandler (m_p, fEnable ? ProcessingInstructionHandler : NULL);
+		assert (m_p != nullptr);
+		XML_SetProcessingInstructionHandler (m_p, fEnable ? ProcessingInstructionHandler : nullptr);
 	}
 
 	// @cmember Enable/Disable the comment handler
 
 	void EnableCommentHandler (bool fEnable = true)
 	{
-		assert (m_p != NULL);
-		XML_SetCommentHandler (m_p, fEnable ? CommentHandler : NULL);
+		assert (m_p != nullptr);
+		XML_SetCommentHandler (m_p, fEnable ? CommentHandler : nullptr);
 	}
 
 	// @cmember Enable/Disable the start CDATA section handler
 
 	void EnableStartCdataSectionHandler (bool fEnable = true)
 	{
-		assert (m_p != NULL);
-		XML_SetStartCdataSectionHandler (m_p, fEnable ? StartCdataSectionHandler : NULL);
+		assert (m_p != nullptr);
+		XML_SetStartCdataSectionHandler (m_p, fEnable ? StartCdataSectionHandler : nullptr);
 	}
 
 	// @cmember Enable/Disable the end CDATA section handler
 
 	void EnableEndCdataSectionHandler (bool fEnable = true)
 	{
-		assert (m_p != NULL);
-		XML_SetEndCdataSectionHandler (m_p, fEnable ? EndCdataSectionHandler : NULL);
+		assert (m_p != nullptr);
+		XML_SetEndCdataSectionHandler (m_p, fEnable ? EndCdataSectionHandler : nullptr);
 	}
 
 	// @cmember Enable/Disable the CDATA section handlers
 
 	void EnableCdataSectionHandler (bool fEnable = true)
 	{
-		assert (m_p != NULL);
+		assert (m_p != nullptr);
 		EnableStartCdataSectionHandler (fEnable);
 		EnableEndCdataSectionHandler (fEnable);
 	}
@@ -248,45 +248,45 @@ protected:
 	
 	void EnableDefaultHandler (bool fEnable = true, bool fExpand = true)
 	{
-		assert (m_p != NULL);
+		assert (m_p != nullptr);
 		if (fExpand)
 		{
-			XML_SetDefaultHandlerExpand (m_p, fEnable ? DefaultHandler : NULL);
+			XML_SetDefaultHandlerExpand (m_p, fEnable ? DefaultHandler : nullptr);
 		}
 		else
-			XML_SetDefaultHandler (m_p, fEnable ? DefaultHandler : NULL);
+			XML_SetDefaultHandler (m_p, fEnable ? DefaultHandler : nullptr);
 	}
 	
 	// @cmember Enable/Disable external entity ref handler
 	
 	void EnableExternalEntityRefHandler (bool fEnable = true)
 	{
-		assert (m_p != NULL);
-		XML_SetExternalEntityRefHandler (m_p, fEnable ? ExternalEntityRefHandler : NULL);
+		assert (m_p != nullptr);
+		XML_SetExternalEntityRefHandler (m_p, fEnable ? ExternalEntityRefHandler : nullptr);
 	}
 	
 	// @cmember Enable/Disable unknown encoding handler
 	
 	void EnableUnknownEncodingHandler (bool fEnable = true)
 	{
-		assert (m_p != NULL);
-		XML_SetUnknownEncodingHandler (m_p, fEnable ? UnknownEncodingHandler : NULL);
+		assert (m_p != nullptr);
+		XML_SetUnknownEncodingHandler (m_p, fEnable ? UnknownEncodingHandler : nullptr);
 	}
 	
 	// @cmember Enable/Disable start namespace handler
 	
 	void EnableStartNamespaceDeclHandler (bool fEnable = true)
 	{
-		assert (m_p != NULL);
-		XML_SetStartNamespaceDeclHandler (m_p, fEnable ? StartNamespaceDeclHandler : NULL);
+		assert (m_p != nullptr);
+		XML_SetStartNamespaceDeclHandler (m_p, fEnable ? StartNamespaceDeclHandler : nullptr);
 	}
 	
 	// @cmember Enable/Disable end namespace handler
 	
 	void EnableEndNamespaceDeclHandler (bool fEnable = true)
 	{
-		assert (m_p != NULL);
-		XML_SetEndNamespaceDeclHandler (m_p, fEnable ? EndNamespaceDeclHandler : NULL);
+		assert (m_p != nullptr);
+		XML_SetEndNamespaceDeclHandler (m_p, fEnable ? EndNamespaceDeclHandler : nullptr);
 	}
 
 	// @cmember Enable/Disable namespace handlers
@@ -301,32 +301,32 @@ protected:
 
 	void EnableXmlDeclHandler (bool fEnable = true)
 	{
-		assert (m_p != NULL);
-		XML_SetXmlDeclHandler (m_p, fEnable ? XmlDeclHandler : NULL);
+		assert (m_p != nullptr);
+		XML_SetXmlDeclHandler (m_p, fEnable ? XmlDeclHandler : nullptr);
 	}
 
 	// @cmember Enable/Disable the start DOCTYPE declaration handler
 
 	void EnableStartDoctypeDeclHandler (bool fEnable = true)
 	{
-		assert (m_p != NULL);
-		XML_SetStartDoctypeDeclHandler (m_p, fEnable ? StartDoctypeDeclHandler : NULL);
+		assert (m_p != nullptr);
+		XML_SetStartDoctypeDeclHandler (m_p, fEnable ? StartDoctypeDeclHandler : nullptr);
 	}
 
 	// @cmember Enable/Disable the end DOCTYPE declaration handler
 
 	void EnableEndDoctypeDeclHandler (bool fEnable = true)
 	{
-		assert (m_p != NULL);
+		assert (m_p != nullptr);
 		XML_SetEndDoctypeDeclHandler (m_p,
-			fEnable ? EndDoctypeDeclHandler : NULL);
+			fEnable ? EndDoctypeDeclHandler : nullptr);
 	}
 
 	// @cmember Enable/Disable the DOCTYPE declaration handler
 
 	void EnableDoctypeDeclHandler (bool fEnable = true)
 	{
-		assert (m_p != NULL);
+		assert (m_p != nullptr);
 		EnableStartDoctypeDeclHandler (fEnable);
 		EnableEndDoctypeDeclHandler (fEnable);
 	}
@@ -338,7 +338,7 @@ public:
 
 	enum XML_Error GetErrorCode ()
 	{
-		assert (m_p != NULL);
+		assert (m_p != nullptr);
 		return XML_GetErrorCode (m_p);
 	}
 
@@ -346,7 +346,7 @@ public:
 
 	long GetCurrentByteIndex ()
 	{
-		assert (m_p != NULL);
+		assert (m_p != nullptr);
 		return XML_GetCurrentByteIndex (m_p);
 	}
 
@@ -354,7 +354,7 @@ public:
 
 	int GetCurrentLineNumber ()
 	{
-		assert (m_p != NULL);
+		assert (m_p != nullptr);
 		return XML_GetCurrentLineNumber (m_p);
 	}
 
@@ -362,7 +362,7 @@ public:
 
 	int GetCurrentColumnNumber ()
 	{
-		assert (m_p != NULL);
+		assert (m_p != nullptr);
 		return XML_GetCurrentColumnNumber (m_p);
 	}
 
@@ -370,7 +370,7 @@ public:
 
 	int GetCurrentByteCount ()
 	{
-		assert (m_p != NULL);
+		assert (m_p != nullptr);
 		return XML_GetCurrentByteCount (m_p);
 	}
 
@@ -378,7 +378,7 @@ public:
 
 	const char *GetInputContext (int *pnOffset, int *pnSize)
 	{
-		assert (m_p != NULL);
+		assert (m_p != nullptr);
 		return XML_GetInputContext (m_p, pnOffset, pnSize);
 	}
 
@@ -682,17 +682,17 @@ protected:
 
 	XML_Parser m_p;
 	
-	/// Returns the value of the specified attribute, if found; NULL otherwise
+	/// Returns the value of the specified attribute, if found; nullptr otherwise
 	static const XML_Char * FindAttr(const XML_Char ** iAttrs, const XML_Char * iAttrToFind)
 	{
-		for (const XML_Char ** Attr = iAttrs; *Attr != NULL; Attr += 2)
+		for (const XML_Char ** Attr = iAttrs; *Attr != nullptr; Attr += 2)
 		{
 			if (strcmp(*Attr, iAttrToFind) == 0)
 			{
 				return *(Attr + 1);
 			}
 		}  // for Attr - iAttrs[]
-		return NULL;
+		return nullptr;
 	}
 } ;
 
diff --git a/src/main.cpp b/src/main.cpp
index 86ecd4000..463c54c28 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -133,8 +133,8 @@ LONG WINAPI LastChanceExceptionFilter(__in struct _EXCEPTION_POINTERS * a_Except
 	ExcInformation.ClientPointers = 0;
 
 	// Write the dump file:
-	HANDLE dumpFile = CreateFile(g_DumpFileName, GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
-	g_WriteMiniDump(GetCurrentProcess(), GetCurrentProcessId(), dumpFile, g_DumpFlags, (a_ExceptionInfo) ? &ExcInformation : NULL, NULL, NULL);
+	HANDLE dumpFile = CreateFile(g_DumpFileName, GENERIC_WRITE, 0, nullptr, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, nullptr);
+	g_WriteMiniDump(GetCurrentProcess(), GetCurrentProcessId(), dumpFile, g_DumpFlags, (a_ExceptionInfo) ? &ExcInformation : nullptr, nullptr, nullptr);
 	CloseHandle(dumpFile);
 
 	// Revert to old stack:
@@ -187,7 +187,7 @@ int main( int argc, char **argv)
 	#if defined(_WIN32) && !defined(_WIN64) && defined(_MSC_VER)
 	HINSTANCE hDbgHelp = LoadLibrary("DBGHELP.DLL");
 	g_WriteMiniDump = (pMiniDumpWriteDump)GetProcAddress(hDbgHelp, "MiniDumpWriteDump");
-	if (g_WriteMiniDump != NULL)
+	if (g_WriteMiniDump != nullptr)
 	{
 		_snprintf_s(g_DumpFileName, ARRAYCOUNT(g_DumpFileName), _TRUNCATE, "crash_mcs_%x.dmp", GetCurrentProcessId());
 		SetUnhandledExceptionFilter(LastChanceExceptionFilter);
@@ -269,7 +269,7 @@ int main( int argc, char **argv)
 		}
 		else if (NoCaseCompare(Arg, "nooutbuf") == 0)
 		{
-			setvbuf(stdout, NULL, _IONBF, 0);
+			setvbuf(stdout, nullptr, _IONBF, 0);
 		}
 	}  // for i - argv[]