17 files changed, 610 insertions, 401 deletions

diff --git a/src/BlockArea.cpp b/src/BlockArea.cpp
index 40cca8882..b4b519bc7 100644
--- a/src/BlockArea.cpp
+++ b/src/BlockArea.cpp
@@ -9,7 +9,7 @@
 #include "OSSupport/GZipFile.h"
 #include "Blocks/BlockHandler.h"
 #include "Cuboid.h"
-
+#include "ChunkBuffer.h"
 
 
 
@@ -1909,116 +1909,88 @@ bool cBlockArea::cChunkReader::Coords(int a_ChunkX, int a_ChunkZ)
 
 
 
-void cBlockArea::cChunkReader::BlockTypes(const BLOCKTYPE * a_BlockTypes)
+void cBlockArea::cChunkReader::ChunkBuffer(const cChunkBuffer &  a_BlockBuffer)
 {
-	if (m_Area.m_BlockTypes == NULL)
-	{
-		// Don't want BlockTypes
-		return;
-	}
-	
-	int SizeY = m_Area.m_Size.y;
-	int MinY = m_Origin.y;
-	
-	// SizeX, SizeZ are the dmensions of the block data to copy from the current chunk (size of the geometric union)
-	// OffX, OffZ are the offsets of the current chunk data from the area origin
-	// BaseX, BaseZ are the offsets of the area data within the current chunk from the chunk borders
-	int SizeX = cChunkDef::Width;
-	int SizeZ = cChunkDef::Width;
-	int OffX, OffZ;
-	int BaseX, BaseZ;
-	OffX = m_CurrentChunkX * cChunkDef::Width - m_Origin.x;
-	if (OffX < 0)
-	{
-		BaseX = -OffX;
-		SizeX += OffX;  // SizeX is decreased, OffX is negative
-		OffX = 0;
-	}
-	else
-	{
-		BaseX = 0;
-	}
-	OffZ = m_CurrentChunkZ * cChunkDef::Width - m_Origin.z;
-	if (OffZ < 0)
-	{
-		BaseZ = -OffZ;
-		SizeZ += OffZ;  // SizeZ is decreased, OffZ is negative
-		OffZ = 0;
-	}
-	else
-	{
-		BaseZ = 0;
-	}
-	// If the chunk extends beyond the area in the X or Z axis, cut off the Size:
-	if ((m_CurrentChunkX + 1) * cChunkDef::Width > m_Origin.x + m_Area.m_Size.x)
-	{
-		SizeX -= (m_CurrentChunkX + 1) * cChunkDef::Width - (m_Origin.x + m_Area.m_Size.x);
-	}
-	if ((m_CurrentChunkZ + 1) * cChunkDef::Width > m_Origin.z + m_Area.m_Size.z)
-	{
-		SizeZ -= (m_CurrentChunkZ + 1) * cChunkDef::Width - (m_Origin.z + m_Area.m_Size.z);
-	}
-
-	for (int y = 0; y < SizeY; y++)
-	{
-		int ChunkY = MinY + y;
-		int AreaY = y;
-		for (int z = 0; z < SizeZ; z++)
+	{ // BlockTypes
+		if (!(m_Area.m_BlockTypes == NULL))
 		{
-			int ChunkZ = BaseZ + z;
-			int AreaZ = OffZ + z;
-			for (int x = 0; x < SizeX; x++)
+			int SizeY = m_Area.m_Size.y;
+			int MinY = m_Origin.y;
+	
+			// SizeX, SizeZ are the dmensions of the block data to copy from the current chunk (size of the geometric union)
+			// OffX, OffZ are the offsets of the current chunk data from the area origin
+			// BaseX, BaseZ are the offsets of the area data within the current chunk from the chunk borders
+			int SizeX = cChunkDef::Width;
+			int SizeZ = cChunkDef::Width;
+			int OffX, OffZ;
+			int BaseX, BaseZ;
+			OffX = m_CurrentChunkX * cChunkDef::Width - m_Origin.x;
+			if (OffX < 0)
 			{
-				int ChunkX = BaseX + x;
-				int AreaX = OffX + x;
-				m_Area.m_BlockTypes[m_Area.MakeIndex(AreaX, AreaY, AreaZ)] = cChunkDef::GetBlock(a_BlockTypes, ChunkX, ChunkY, ChunkZ);
-			}  // for x
-		}  // for z
-	}  // for y
-}
-
-
-
+				BaseX = -OffX;
+				SizeX += OffX;  // SizeX is decreased, OffX is negative
+				OffX = 0;
+			}
+			else
+			{
+				BaseX = 0;
+			}
+			OffZ = m_CurrentChunkZ * cChunkDef::Width - m_Origin.z;
+			if (OffZ < 0)
+			{
+				BaseZ = -OffZ;
+				SizeZ += OffZ;  // SizeZ is decreased, OffZ is negative
+				OffZ = 0;
+			}
+			else
+			{
+				BaseZ = 0;
+			}
+			// If the chunk extends beyond the area in the X or Z axis, cut off the Size:
+			if ((m_CurrentChunkX + 1) * cChunkDef::Width > m_Origin.x + m_Area.m_Size.x)
+			{
+				SizeX -= (m_CurrentChunkX + 1) * cChunkDef::Width - (m_Origin.x + m_Area.m_Size.x);
+			}
+			if ((m_CurrentChunkZ + 1) * cChunkDef::Width > m_Origin.z + m_Area.m_Size.z)
+			{
+				SizeZ -= (m_CurrentChunkZ + 1) * cChunkDef::Width - (m_Origin.z + m_Area.m_Size.z);
+			}
 
+			for (int y = 0; y < SizeY; y++)
+			{
+				int ChunkY = MinY + y;
+				int AreaY = y;
+				for (int z = 0; z < SizeZ; z++)
+				{
+					int ChunkZ = BaseZ + z;
+					int AreaZ = OffZ + z;
+					for (int x = 0; x < SizeX; x++)
+					{
+						int ChunkX = BaseX + x;
+						int AreaX = OffX + x;
+						m_Area.m_BlockTypes[m_Area.MakeIndex(AreaX, AreaY, AreaZ)] = a_BlockBuffer.GetBlock(ChunkX, ChunkY, ChunkZ);
+					}  // for x
+				}  // for z
+			}  // for y
+		}
+	}
 
-void cBlockArea::cChunkReader::BlockMeta(const NIBBLETYPE * a_BlockMetas)
-{
-	if (m_Area.m_BlockMetas == NULL)
+	if (m_Area.m_BlockMetas)
 	{
-		// Don't want metas
-		return;
+		a_BlockBuffer.CopyMeta(m_Area.m_BlockMetas);
 	}
-	CopyNibbles(m_Area.m_BlockMetas, a_BlockMetas);
-}
-
-
-
 
-
-void cBlockArea::cChunkReader::BlockLight(const NIBBLETYPE * a_BlockLight)
-{
-	if (m_Area.m_BlockLight == NULL)
+	if (m_Area.m_BlockLight)
 	{
-		// Don't want light
-		return;
+		a_BlockBuffer.CopyLight(m_Area.m_BlockLight);
 	}
-	CopyNibbles(m_Area.m_BlockLight, a_BlockLight);
-}
-
-
 
-
-
-void cBlockArea::cChunkReader::BlockSkyLight(const NIBBLETYPE * a_BlockSkyLight)
-{
-	if (m_Area.m_BlockSkyLight == NULL)
+	if (m_Area.m_BlockSkyLight)
 	{
-		// Don't want skylight
-		return;
+		a_BlockBuffer.CopySkyLight(m_Area.m_BlockSkyLight);
 	}
-	CopyNibbles(m_Area.m_BlockSkyLight, a_BlockSkyLight);
-}
 
+}
 
 
 
diff --git a/src/BlockArea.h b/src/BlockArea.h
index c48175b8c..d17a68fbb 100644
--- a/src/BlockArea.h
+++ b/src/BlockArea.h
@@ -317,10 +317,7 @@ protected:
 		
 		// cChunkDataCallback overrides:
 		virtual bool Coords       (int a_ChunkX, int a_ChunkZ) override;
-		virtual void BlockTypes   (const BLOCKTYPE *  a_BlockTypes)    override;
-		virtual void BlockMeta    (const NIBBLETYPE * a_BlockMetas)    override;
-		virtual void BlockLight   (const NIBBLETYPE * a_BlockLight)    override;
-		virtual void BlockSkyLight(const NIBBLETYPE * a_BlockSkyLight) override;
+		virtual void ChunkBuffer   (const cChunkBuffer &  a_BlockTypes)    override;
 	} ;
 	
 	typedef NIBBLETYPE * NIBBLEARRAY;
diff --git a/src/Chunk.cpp b/src/Chunk.cpp
index ee1531b5c..171f329fb 100644
--- a/src/Chunk.cpp
+++ b/src/Chunk.cpp
@@ -241,23 +241,9 @@ void cChunk::GetAllData(cChunkDataCallback & a_Callback)
 	a_Callback.HeightMap    (&m_HeightMap);
 	a_Callback.BiomeData    (&m_BiomeMap);
 
-	std::vector<BLOCKTYPE> Blocks = m_BlockTypes;
-	Blocks.resize(NumBlocks);
-	a_Callback.BlockTypes   (&Blocks[0]);
-
-	std::vector<NIBBLETYPE> Metas = m_BlockMeta;
-	Metas.resize(NumBlocks / 2);
-	a_Callback.BlockMeta    (&Metas[0]);
-
 	a_Callback.LightIsValid (m_IsLightValid);
 
-	std::vector<NIBBLETYPE> BlockLights = m_BlockLight;
-	BlockLights.resize(NumBlocks / 2);
-	a_Callback.BlockLight   (&BlockLights[0]);
-
-	std::vector<NIBBLETYPE> BlockSkyLights = m_BlockSkyLight;
-	BlockSkyLights.resize(NumBlocks / 2, 0xff);
-	a_Callback.BlockSkyLight(&BlockSkyLights[0]);
+	a_Callback.ChunkBuffer  (m_ChunkBuffer);
 	
 	for (cEntityList::iterator itr = m_Entities.begin(); itr != m_Entities.end(); ++itr)
 	{
@@ -296,48 +282,10 @@ void cChunk::SetAllData(
 		CalculateHeightmap(a_BlockTypes);
 	}
 
-	int IdxWhereNonEmptyStarts = 0;
-	{ // Blocktype compression
-		unsigned char Highest = 0;
-		int X = 0, Z = 0;
-		m_BlockTypes.clear();
-			
-		for (int x = 0; x < Width; x++)
-		{
-			for (int z = 0; z < Width; z++)
-			{
-				unsigned char Height = m_HeightMap[x + z * Width];
-				if (Height > Highest)
-				{
-					Highest = Height;
-					X = x; Z = z;
-				}
-			}
-		}
-
-		IdxWhereNonEmptyStarts = MakeIndexNoCheck(X, Highest + 1, Z);
-
-		m_BlockTypes.insert(m_BlockTypes.end(), &a_BlockTypes[0], &a_BlockTypes[IdxWhereNonEmptyStarts]);
-	}
-
-	{ // Blockmeta compression
-		m_BlockMeta.clear();
-		m_BlockMeta.insert(m_BlockMeta.end(), &a_BlockMeta[0], &a_BlockMeta[IdxWhereNonEmptyStarts / 2]);
-	}
-	
-	if (a_BlockLight != NULL)
-	{
-		// Compress blocklight
-		m_BlockLight.clear();
-		m_BlockLight.insert(m_BlockLight.end(), &a_BlockLight[0], &a_BlockLight[IdxWhereNonEmptyStarts / 2]);
-	}
-
-	if (a_BlockSkyLight != NULL)
-	{
-		 // Compress skylight
-		m_BlockSkyLight.clear();
-		m_BlockSkyLight.insert(m_BlockSkyLight.end(), &a_BlockSkyLight[0], &a_BlockSkyLight[IdxWhereNonEmptyStarts / 2]);
-	}
+	m_ChunkBuffer.SetBlocks   (a_BlockTypes);
+	m_ChunkBuffer.SetMeta     (a_BlockMeta);
+	m_ChunkBuffer.SetLight    (a_BlockLight);
+	m_ChunkBuffer.SetSkyLight (a_BlockSkyLight);
 	
 	m_IsLightValid = (a_BlockLight != NULL) && (a_BlockSkyLight != NULL);
 
@@ -378,39 +326,9 @@ void cChunk::SetLight(
 	// TODO: We might get cases of wrong lighting when a chunk changes in the middle of a lighting calculation.
 	// Postponing until we see how bad it is :)
 
-	{ // Compress blocklight
-		bool FoundNonEmpty = false;
-		int IdxWhereNonEmptyStarts = 0;
-		m_BlockLight.clear();
-
-		for (int Idx = (NumBlocks / 2) - 1; Idx >= 0; Idx--)
-		{
-			if (a_BlockLight[Idx] != 0)
-			{
-				FoundNonEmpty = true;
-				IdxWhereNonEmptyStarts = Idx;
-				break;
-			}
-		}
-		m_BlockLight.insert(m_BlockLight.end(), &a_BlockLight[0], &a_BlockLight[IdxWhereNonEmptyStarts + 1]);
-	}
-
-	{ // Compress skylight
-		bool FoundNonEmpty = false;
-		int IdxWhereNonEmptyStarts = 0;
-		m_BlockSkyLight.clear();
+	m_ChunkBuffer.SetLight    (a_BlockLight);
 
-		for (int Idx = (NumBlocks / 2) - 1; Idx >= 0; Idx--)
-		{
-			if (a_SkyLight[Idx] != 0xff)
-			{
-				FoundNonEmpty = true;
-				IdxWhereNonEmptyStarts = Idx;
-				break;
-			}
-		}
-		m_BlockSkyLight.insert(m_BlockSkyLight.end(), &a_SkyLight[0], &a_SkyLight[IdxWhereNonEmptyStarts + 1]);
-	}
+	m_ChunkBuffer.SetSkyLight (a_SkyLight);
 
 	m_IsLightValid = true;
 }
@@ -421,10 +339,7 @@ void cChunk::SetLight(
 
 void cChunk::GetBlockTypes(BLOCKTYPE * a_BlockTypes)
 {
-	std::vector<BLOCKTYPE> Blocks = m_BlockTypes;
-	Blocks.resize(NumBlocks);
-
-	memcpy(a_BlockTypes, &Blocks[0], NumBlocks);
+	m_ChunkBuffer.CopyBlocks(a_BlockTypes);
 }
 
 
@@ -710,8 +625,7 @@ void cChunk::Tick(float a_Dt)
 
 void cChunk::TickBlock(int a_RelX, int a_RelY, int a_RelZ)
 {
-	unsigned Index = MakeIndex(a_RelX, a_RelY, a_RelZ);
-	cBlockHandler * Handler = BlockHandler(GetBlock(Index));
+	cBlockHandler * Handler = BlockHandler(GetBlock(a_RelX, a_RelY, a_RelZ));
 	ASSERT(Handler != NULL);  // Happenned on server restart, FS #243
 	cChunkInterface ChunkInterface(this->GetWorld()->GetChunkMap());
 	cBlockInServerPluginInterface PluginInterface(*this->GetWorld());
@@ -836,19 +750,18 @@ void cChunk::CheckBlocks()
 	{
 		return;
 	}
-	std::vector<unsigned int> ToTickBlocks;
+	std::vector<Vector3i> ToTickBlocks;
 	std::swap(m_ToTickBlocks, ToTickBlocks);
 	
 	cChunkInterface ChunkInterface(m_World->GetChunkMap());
 	cBlockInServerPluginInterface PluginInterface(*m_World);
 	
-	for (std::vector<unsigned int>::const_iterator itr = ToTickBlocks.begin(), end = ToTickBlocks.end(); itr != end; ++itr)
+	for (std::vector<Vector3i>::const_iterator itr = ToTickBlocks.begin(), end = ToTickBlocks.end(); itr != end; ++itr)
 	{
-		unsigned int index = (*itr);
-		Vector3i BlockPos = IndexToCoordinate(index);
+		Vector3i Pos = (*itr);
 
-		cBlockHandler * Handler = BlockHandler(GetBlock(index));
-		Handler->Check(ChunkInterface, PluginInterface, BlockPos.x, BlockPos.y, BlockPos.z, *this);
+		cBlockHandler * Handler = BlockHandler(GetBlock(Pos));
+		Handler->Check(ChunkInterface, PluginInterface, Pos.x, Pos.y, Pos.z, *this);
 	}  // for itr - ToTickBlocks[]
 }
 
@@ -891,8 +804,7 @@ void cChunk::TickBlocks(void)
 			continue; // It's all air up here
 		}
 
-		unsigned int Index = MakeIndexNoCheck(m_BlockTickX, m_BlockTickY, m_BlockTickZ);
-		cBlockHandler * Handler = BlockHandler(GetBlock(Index));
+		cBlockHandler * Handler = BlockHandler(GetBlock(m_BlockTickX, m_BlockTickY, m_BlockTickZ));
 		ASSERT(Handler != NULL);  // Happenned on server restart, FS #243
 		Handler->OnUpdate(ChunkInterface, *this->GetWorld(), PluginInterface, *this, m_BlockTickX, m_BlockTickY, m_BlockTickZ);
 	}  // for i - tickblocks
@@ -1284,9 +1196,8 @@ bool cChunk::UnboundedRelGetBlockLights(int a_RelX, int a_RelY, int a_RelZ, NIBB
 		// The chunk is not available, bail out
 		return false;
 	}
-	int idx = Chunk->MakeIndex(a_RelX, a_RelY, a_RelZ);
-	a_BlockLight = Chunk->GetBlockLight(idx);
-	a_SkyLight = Chunk->GetSkyLight(idx);
+	a_BlockLight = Chunk->GetBlockLight(a_RelX, a_RelY, a_RelZ);
+	a_SkyLight = Chunk->GetSkyLight(a_RelX, a_RelY, a_RelZ);
 	return true;
 }
 
@@ -1490,11 +1401,9 @@ void cChunk::CalculateHeightmap(const BLOCKTYPE * a_BlockTypes)
 void cChunk::SetBlock(int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta)
 {
 	FastSetBlock(a_RelX, a_RelY, a_RelZ, a_BlockType, a_BlockMeta);
-
-	const int index = MakeIndexNoCheck(a_RelX, a_RelY, a_RelZ);
 	
 	// Tick this block and its neighbors:
-	m_ToTickBlocks.push_back(index);
+	m_ToTickBlocks.push_back(Vector3i(a_RelX, a_RelY, a_RelZ));
 	QueueTickBlockNeighbors(a_RelX, a_RelY, a_RelZ);
 
 	// If there was a block entity, remove it:
@@ -1557,7 +1466,7 @@ void cChunk::QueueTickBlock(int a_RelX, int a_RelY, int a_RelZ)
 		return;
 	}
 	
-	m_ToTickBlocks.push_back(MakeIndexNoCheck(a_RelX, a_RelY, a_RelZ));
+	m_ToTickBlocks.push_back(Vector3i(a_RelX, a_RelY, a_RelZ));
 }
 
 
@@ -1595,9 +1504,8 @@ void cChunk::FastSetBlock(int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE a_BlockT
 
 	ASSERT(IsValid());
 	
-	const int index = MakeIndexNoCheck(a_RelX, a_RelY, a_RelZ);
-	const BLOCKTYPE OldBlockType = GetBlock(index);
-	const BLOCKTYPE OldBlockMeta = GetNibble(m_BlockMeta, index);
+	const BLOCKTYPE OldBlockType = GetBlock(a_RelX, a_RelY, a_RelZ);
+	const BLOCKTYPE OldBlockMeta = m_ChunkBuffer.GetMeta(a_RelX, a_RelY, a_RelZ);
 	if ((OldBlockType == a_BlockType) && (OldBlockMeta == a_BlockMeta))
 	{
 		return;
@@ -1605,11 +1513,7 @@ void cChunk::FastSetBlock(int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE a_BlockT
 
 	MarkDirty();
 
-	if (m_BlockTypes.empty() || ((size_t)index > m_BlockTypes.size() - 1) /* Vector starts from zero, .size() starts from 1 */)
-	{
-		m_BlockTypes.resize(index + 1);
-	}
-	m_BlockTypes[index] = a_BlockType;
+	m_ChunkBuffer.SetBlock(a_RelX, a_RelY, a_RelZ, a_BlockType);
 
 	// The client doesn't need to distinguish between stationary and nonstationary fluids:
 	if (
@@ -1625,7 +1529,7 @@ void cChunk::FastSetBlock(int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE a_BlockT
 		m_PendingSendBlocks.push_back(sSetBlock(m_PosX, m_PosZ, a_RelX, a_RelY, a_RelZ, a_BlockType, a_BlockMeta));
 	}
 	
-	SetNibble(m_BlockMeta, index, a_BlockMeta);
+	m_ChunkBuffer.SetMeta(a_RelX, a_RelY, a_RelZ, a_BlockMeta);
 
 	// ONLY recalculate lighting if it's necessary!
 	if (
@@ -1648,7 +1552,7 @@ void cChunk::FastSetBlock(int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE a_BlockT
 		{
 			for (int y = a_RelY - 1; y > 0; --y)
 			{
-				if (GetBlock(MakeIndexNoCheck(a_RelX, y, a_RelZ)) != E_BLOCK_AIR)
+				if (GetBlock(a_RelX, y, a_RelZ) != E_BLOCK_AIR)
 				{
 					m_HeightMap[a_RelX + a_RelZ * Width] = (unsigned char)y;
 					break;
@@ -1665,18 +1569,16 @@ 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)
 {
 	// The coords must be valid, because the upper level already does chunk lookup. No need to check them again.
-	// There's an debug-time assert in MakeIndexNoCheck anyway
-	unsigned int index = MakeIndexNoCheck(a_RelX, a_RelY, a_RelZ);
 
 	if (a_Client == NULL)
 	{
 		// 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(index), GetMeta(index)));
+		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)));
 		return;
 	}
 
 	Vector3i wp = PositionToWorldPosition(a_RelX, a_RelY, a_RelZ);
-	a_Client->SendBlockChange(wp.x, wp.y, wp.z, GetBlock(index), GetMeta(index));
+	a_Client->SendBlockChange(wp.x, wp.y, wp.z, GetBlock(a_RelX, a_RelY, a_RelZ), GetMeta(a_RelX, a_RelY, a_RelZ));
 	
 	// FS #268 - if a BlockEntity digging is cancelled by a plugin, the entire block entity must be re-sent to the client:
 	for (cBlockEntityList::iterator itr = m_BlockEntities.begin(), end = m_BlockEntities.end(); itr != end; ++itr)
@@ -2535,27 +2437,7 @@ BLOCKTYPE cChunk::GetBlock(int a_RelX, int a_RelY, int a_RelZ) const
 		return 0; // Clip
 	}
 
-	return GetBlock(MakeIndexNoCheck(a_RelX, a_RelY, a_RelZ));
-}
-
-
-
-
-
-BLOCKTYPE cChunk::GetBlock(int a_BlockIdx) const
-{
-	if ((a_BlockIdx < 0) || (a_BlockIdx >= NumBlocks))
-	{
-		ASSERT(!"GetBlock(idx) out of bounds!");
-		return 0;
-	}
-
-	if (m_BlockTypes.empty() || ((size_t)a_BlockIdx > m_BlockTypes.size() - 1) /* Vector starts from zero, .size() starts from 1 */)
-	{
-		return E_BLOCK_AIR;
-	}
-
-	return m_BlockTypes[a_BlockIdx];
+	return m_ChunkBuffer.GetBlock(a_RelX, a_RelY, a_RelZ);
 }
 
 
@@ -2564,9 +2446,8 @@ BLOCKTYPE cChunk::GetBlock(int a_BlockIdx) const
 
 void cChunk::GetBlockTypeMeta(int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE & a_BlockType, NIBBLETYPE & a_BlockMeta)
 {
-	int Idx = cChunkDef::MakeIndexNoCheck(a_RelX, a_RelY, a_RelZ);
-	a_BlockType = GetBlock(Idx);
-	a_BlockMeta = cChunkDef::GetNibble(m_BlockMeta,  Idx);
+	a_BlockType = GetBlock(a_RelX, a_RelY, a_RelZ);
+	a_BlockMeta = m_ChunkBuffer.GetMeta(a_RelX, a_RelY, a_RelZ);
 }
 
 
@@ -2575,11 +2456,10 @@ void cChunk::GetBlockTypeMeta(int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE & a_
 
 void cChunk::GetBlockInfo(int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE & a_BlockType, NIBBLETYPE & a_Meta, NIBBLETYPE & a_SkyLight, NIBBLETYPE & a_BlockLight)
 {
-	int Idx = cChunkDef::MakeIndexNoCheck(a_RelX, a_RelY, a_RelZ);
-	a_BlockType = GetBlock(Idx);
-	a_Meta       = cChunkDef::GetNibble(m_BlockMeta,     Idx);
-	a_SkyLight   = cChunkDef::GetNibble(m_BlockSkyLight, Idx);
-	a_BlockLight = cChunkDef::GetNibble(m_BlockLight,    Idx);
+	a_BlockType  = GetBlock(a_RelX, a_RelY, a_RelZ);
+	a_Meta       = m_ChunkBuffer.GetMeta(a_RelX, a_RelY, a_RelZ);
+	a_SkyLight   = m_ChunkBuffer.GetSkyLight(a_RelX, a_RelY, a_RelZ);
+	a_BlockLight = m_ChunkBuffer.GetBlockLight(a_RelX, a_RelY, a_RelZ);
 }
 
 
diff --git a/src/Chunk.h b/src/Chunk.h
index 9100eec58..ea3e035ad 100644
--- a/src/Chunk.h
+++ b/src/Chunk.h
@@ -3,6 +3,7 @@
 
 #include "Entities/Entity.h"
 #include "ChunkDef.h"
+#include "ChunkBuffer.h"
 
 #include "Simulator/FireSimulator.h"
 #include "Simulator/SandSimulator.h"
@@ -66,6 +67,7 @@ public:
 		cChunkMap * a_ChunkMap, cWorld * a_World,   // Parent objects
 		cChunk * a_NeighborXM, cChunk * a_NeighborXP, cChunk * a_NeighborZM, cChunk * a_NeighborZP  // Neighbor chunks
 	);
+	cChunk(cChunk& other);
 	~cChunk();
 
 	bool IsValid(void) const {return m_IsValid; }  // Returns true if the chunk block data is valid (loaded / generated)
@@ -154,7 +156,7 @@ public:
 
 	void FastSetBlock(int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE a_BlockType, BLOCKTYPE a_BlockMeta );  // Doesn't force block updates on neighbors, use for simple changes such as grass growing etc.
 	BLOCKTYPE GetBlock(int a_RelX, int a_RelY, int a_RelZ) const;
-	BLOCKTYPE GetBlock(int a_BlockIdx) const;
+	BLOCKTYPE GetBlock(Vector3i a_cords) const { return GetBlock(a_cords.x,a_cords.y,a_cords.z);}
 	void      GetBlockTypeMeta(int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE & a_BlockType, NIBBLETYPE & a_BlockMeta);
 	void      GetBlockInfo    (int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE & a_BlockType, NIBBLETYPE & a_Meta, NIBBLETYPE & a_SkyLight, NIBBLETYPE & a_BlockLight);
 	
@@ -320,15 +322,17 @@ public:
 		m_BlockTickZ = a_RelZ;
 	}
 	
-	inline NIBBLETYPE GetMeta(int a_RelX, int a_RelY, int a_RelZ) const              {return cChunkDef::GetNibble(m_BlockMeta, a_RelX, a_RelY, a_RelZ); }
-	inline NIBBLETYPE GetMeta(int a_BlockIdx) const                                  {return cChunkDef::GetNibble(m_BlockMeta, a_BlockIdx); }
-	inline void       SetMeta(int a_RelX, int a_RelY, int a_RelZ, NIBBLETYPE a_Meta) {       cChunkDef::SetNibble(m_BlockMeta, a_RelX, a_RelY, a_RelZ, a_Meta); }
-	inline void       SetMeta(int a_BlockIdx, NIBBLETYPE a_Meta)                     {       cChunkDef::SetNibble(m_BlockMeta, a_BlockIdx, a_Meta); }
+	inline NIBBLETYPE GetMeta(int a_RelX, int a_RelY, int a_RelZ) const
+	{
+		return m_ChunkBuffer.GetMeta(a_RelX, a_RelY, a_RelZ);
+	}
+	inline void       SetMeta(int a_RelX, int a_RelY, int a_RelZ, NIBBLETYPE a_Meta)
+	{
+		m_ChunkBuffer.SetMeta(a_RelX, a_RelY, a_RelZ, a_Meta);
+	}
 
-	inline NIBBLETYPE GetBlockLight(int a_RelX, int a_RelY, int a_RelZ) const {return cChunkDef::GetNibble(m_BlockLight, a_RelX, a_RelY, a_RelZ); }
-	inline NIBBLETYPE GetSkyLight  (int a_RelX, int a_RelY, int a_RelZ) const {return cChunkDef::GetNibble(m_BlockSkyLight, a_RelX, a_RelY, a_RelZ, true); }
-	inline NIBBLETYPE GetBlockLight(int a_Idx) const {return cChunkDef::GetNibble(m_BlockLight, a_Idx); }
-	inline NIBBLETYPE GetSkyLight  (int a_Idx) const {return cChunkDef::GetNibble(m_BlockSkyLight, a_Idx, true); }
+	inline NIBBLETYPE GetBlockLight(int a_RelX, int a_RelY, int a_RelZ) const {return m_ChunkBuffer.GetBlockLight(a_RelX, a_RelY, a_RelZ); }
+	inline NIBBLETYPE GetSkyLight  (int a_RelX, int a_RelY, int a_RelZ) const {return m_ChunkBuffer.GetSkyLight(a_RelX, a_RelY, a_RelZ); }
 	
 	/** Same as GetBlock(), but relative coords needn't be in this chunk (uses m_Neighbor-s or m_ChunkMap in such a case); returns true on success */
 	bool UnboundedRelGetBlock(int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE & a_BlockType, NIBBLETYPE & a_BlockMeta) const;
@@ -403,8 +407,8 @@ private:
 	bool m_IsSaving;       // True if the chunk is being saved
 	bool m_HasLoadFailed;  // True if chunk failed to load and hasn't been generated yet since then
 	
-	std::vector<unsigned int> m_ToTickBlocks;
-	sSetBlockVector           m_PendingSendBlocks;  ///< Blocks that have changed and need to be sent to all clients
+	std::vector<Vector3i> m_ToTickBlocks;
+	sSetBlockVector       m_PendingSendBlocks;  ///< Blocks that have changed and need to be sent to all clients
 	
 	sSetBlockQueueVector m_SetBlockQueue;  ///< Block changes that are queued to a specific tick
 	
@@ -420,11 +424,7 @@ private:
 	cWorld *    m_World;
 	cChunkMap * m_ChunkMap;
 
-	// TODO: Make these pointers and don't allocate what isn't needed
-	std::vector<BLOCKTYPE> m_BlockTypes;
-	std::vector<NIBBLETYPE> m_BlockMeta;
-	std::vector<NIBBLETYPE> m_BlockLight;
-	std::vector<NIBBLETYPE> m_BlockSkyLight;
+	cChunkBuffer m_ChunkBuffer;
 
 	cChunkDef::HeightMap m_HeightMap;
 	cChunkDef::BiomeMap  m_BiomeMap;
diff --git a/src/ChunkBuffer.cpp b/src/ChunkBuffer.cpp
new file mode 100644
index 000000000..8e87d3049
--- /dev/null
+++ b/src/ChunkBuffer.cpp
@@ -0,0 +1,146 @@
+
+#include "Globals.h"
+#include "ChunkBuffer.h"
+
+cChunkBuffer cChunkBuffer::Copy() const
+{
+	cChunkBuffer copy;
+	for (int i = 0; i < CHUNK_SECTION_NUM; i++)
+	{
+		if(m_Sections[i])
+		{
+			copy.m_Sections[i] = Allocate();
+			*copy.m_Sections[i] = *m_Sections[i];
+		}
+	}
+	return copy;
+}
+
+
+
+
+
+void cChunkBuffer::CopyBlocks   (BLOCKTYPE * a_dest, size_t a_Idx, size_t length)  const
+{
+	for (int i = 0; i < CHUNK_SECTION_NUM; i++)
+	{
+		const size_t segment_length =  CHUNK_SECTION_HEIGHT * 16 * 16;
+		if (a_Idx > 0) a_Idx = a_Idx > length ? a_Idx - length : 0;
+		if (a_Idx == 0) 
+		{
+			size_t tocopy = length > segment_length ? segment_length : length;
+			length -= tocopy;
+			memcpy(&a_dest[i * segment_length], &m_Sections[i]->m_BlockTypes, sizeof(BLOCKTYPE) * length);
+		}
+	}
+}
+
+
+
+
+
+void cChunkBuffer::CopyMeta(NIBBLETYPE * a_dest) const
+{
+	for (int i = 0; i < CHUNK_SECTION_NUM; i++)
+	{
+		const size_t segment_length = CHUNK_SECTION_HEIGHT * 16 * 16 / 2;
+		memcpy(&a_dest[i * segment_length], &m_Sections[i]->m_BlockMeta, sizeof(NIBBLETYPE) * segment_length);
+	}
+}
+
+
+
+
+
+void cChunkBuffer::CopyLight(NIBBLETYPE * a_dest) const
+{
+	for (int i = 0; i < CHUNK_SECTION_NUM; i++)
+	{
+		const size_t segment_length = CHUNK_SECTION_HEIGHT * 16 * 16 / 2;
+		memcpy(&a_dest[i * segment_length], &m_Sections[i]->m_BlockLight, sizeof(NIBBLETYPE) * segment_length);
+	}
+}
+
+
+
+
+
+void cChunkBuffer::CopySkyLight(NIBBLETYPE * a_dest) const
+{
+	for (int i = 0; i < CHUNK_SECTION_NUM; i++)
+	{
+		const size_t segment_length = CHUNK_SECTION_HEIGHT * 16 * 16 / 2;
+		memcpy(&a_dest[i * segment_length], &m_Sections[i]->m_BlockSkyLight, sizeof(NIBBLETYPE) * segment_length);
+	}
+}
+
+
+
+
+
+void cChunkBuffer::SetBlocks(const BLOCKTYPE * a_src)
+{
+	for (int i = 0; i < CHUNK_SECTION_NUM; i++)
+	{
+		const size_t segment_length = CHUNK_SECTION_HEIGHT * 16 * 16 / 2;
+		if (m_Sections[i])
+		{
+			memcpy(&m_Sections[i]->m_BlockTypes, &a_src[i * segment_length], sizeof(BLOCKTYPE) * segment_length);
+		}
+	} 
+}
+
+
+
+
+void cChunkBuffer::SetMeta(const NIBBLETYPE * a_src)
+{
+	for (int i = 0; i < CHUNK_SECTION_NUM; i++)
+	{
+		const size_t segment_length = CHUNK_SECTION_HEIGHT * 16 * 16 / 2;
+		if (m_Sections[i])
+		{
+			memcpy(&m_Sections[i]->m_BlockMeta, &a_src[i * segment_length], sizeof(NIBBLETYPE) * segment_length);
+		}
+	} 
+}
+
+
+
+
+void cChunkBuffer::SetLight(const NIBBLETYPE * a_src)
+{
+	for (int i = 0; i < CHUNK_SECTION_NUM; i++)
+	{
+		const size_t segment_length = CHUNK_SECTION_HEIGHT * 16 * 16 / 2;
+		if (m_Sections[i])
+		{
+			memcpy(&m_Sections[i]->m_BlockLight, &a_src[i * segment_length], sizeof(NIBBLETYPE) * segment_length);
+		}
+	} 
+}
+
+
+
+
+void cChunkBuffer::SetSkyLight  (const NIBBLETYPE * a_src)
+{
+	for (int i = 0; i < CHUNK_SECTION_NUM; i++)
+	{
+		const size_t segment_length = CHUNK_SECTION_HEIGHT * 16 * 16 / 2;
+		if (m_Sections[i])
+		{
+			memcpy(&m_Sections[i]->m_BlockSkyLight, &a_src[i * segment_length], sizeof(NIBBLETYPE) * segment_length);
+		}
+	} 
+}
+
+
+
+
+
+cChunkBuffer::sChunkSection * cChunkBuffer::Allocate() const
+{
+	// TODO: use a allocation pool
+	return new cChunkBuffer::sChunkSection;
+}
diff --git a/src/ChunkBuffer.h b/src/ChunkBuffer.h
new file mode 100644
index 000000000..44e447c82
--- /dev/null
+++ b/src/ChunkBuffer.h
@@ -0,0 +1,310 @@
+
+#pragma once
+
+#define CHUNK_SECTION_HEIGHT 16
+#define CHUNK_SECTION_NUM (256 / CHUNK_SECTION_HEIGHT)
+
+#if __cplusplus < 201103L
+// auto_ptr style interface for memory management
+#else
+// unique_ptr style interface for memory management
+#endif
+
+class cChunkBuffer
+{
+public:
+
+	cChunkBuffer()
+	#if __cplusplus < 201103L
+	// auto_ptr style interface for memory management
+	: IsOwner(true)
+	#endif
+	{
+		memset(m_Sections, 0, sizeof(m_Sections));
+	}
+	~cChunkBuffer()
+	{
+		#if __cplusplus < 201103L
+		// auto_ptr style interface for memory management
+		if(!IsOwner) return;
+		#endif
+		for (int i = 0; i < CHUNK_SECTION_NUM; i++)
+		{
+			if(m_Sections[i]) delete m_Sections[i];
+		}
+	}
+	
+	#if __cplusplus < 201103L
+	// auto_ptr style interface for memory management
+	cChunkBuffer(cChunkBuffer& other) :
+	IsOwner(true);
+	{
+		for (int i = 0; i < CHUNK_SECTION_NUM; i++)
+		{
+			m_Sections[i] = other.m_Sections[i];
+		}
+		other.IsOwner = false;
+	}
+	void operator=(cChunkBuffer& other)
+	{
+		if(IsOwner)
+		{
+			for (int i = 0; i < CHUNK_SECTION_NUM; i++)
+			{
+				if(m_Sections[i]) delete m_Sections[i];
+			}
+		}
+		IsOwner = true;
+		for (int i = 0; i < CHUNK_SECTION_NUM; i++)
+		{
+			m_Sections[i] = other.m_Sections[i];
+		}
+		other.IsOwner = false;
+	}
+	#else
+	// unique_ptr style interface for memory management
+	cChunkBuffer(cChunkBuffer&& other)
+	{
+		for (int i = 0; i < CHUNK_SECTION_NUM; i++)
+		{
+			m_Sections[i] = other.m_Sections[i];
+		}
+	}
+	
+	void operator=(cChunkBuffer&& other)
+	{
+		for (int i = 0; i < CHUNK_SECTION_NUM; i++)
+		{
+			if(m_Sections[i]) delete m_Sections[i];
+			m_Sections[i] = other.m_Sections[i];
+		}
+	}
+	#endif
+
+	BLOCKTYPE GetBlock(int a_X, int a_Y, int a_Z) const
+	{
+		ASSERT((a_X >= 0) && (a_X < cChunkDef::Width));
+		ASSERT((a_Y >= 0) && (a_Y < cChunkDef::Height));
+		ASSERT((a_Z >= 0) && (a_Z < cChunkDef::Width));
+		int Section = a_Y / CHUNK_SECTION_HEIGHT;
+		if(m_Sections[Section])
+		{
+			int Index = cChunkDef::MakeIndexNoCheck(a_X, a_Y - (Section * CHUNK_SECTION_HEIGHT), a_Z);
+			return m_Sections[Section]->m_BlockTypes[Index];
+		}
+		else
+		{
+			return 0;
+		}
+	}
+	
+	void SetBlock(int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE a_Block)
+	{
+		if (
+			(a_RelX >= cChunkDef::Width)  || (a_RelX < 0) ||
+			(a_RelY >= cChunkDef::Height) || (a_RelY < 0) ||
+			(a_RelZ >= cChunkDef::Width)  || (a_RelZ < 0)
+		)
+		{
+			ASSERT(!"cChunkBuffer::SetMeta(): index out of range!");
+			return;
+		}
+
+		int Section = a_RelY / CHUNK_SECTION_HEIGHT;
+		if(!m_Sections[Section])
+		{
+			m_Sections[Section] = Allocate();
+			if(!m_Sections[Section])
+			{
+				ASSERT("Failed to allocate a new section in Chunkbuffer");
+				return;
+			}
+		}
+		int Index = cChunkDef::MakeIndexNoCheck(a_RelX, a_RelY - (Section * CHUNK_SECTION_HEIGHT), a_RelZ);
+		m_Sections[Section]->m_BlockTypes[Index] = a_Block;
+	}
+
+	NIBBLETYPE GetMeta(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 / CHUNK_SECTION_HEIGHT;
+			if(m_Sections[Section])
+			{
+				int Index = cChunkDef::MakeIndexNoCheck(a_RelX, a_RelY - (Section * CHUNK_SECTION_HEIGHT), a_RelZ);
+				return (m_Sections[Section]->m_BlockMeta[Index / 2] >> ((Index & 1) * 4)) & 0x0f;
+			}
+			else
+			{
+				return 0;
+			}
+		}
+		ASSERT(!"cChunkBuffer::GetMeta(): coords out of chunk range!");
+		return 0;
+	}
+	
+	void SetMeta(int a_RelX, int a_RelY, int a_RelZ, NIBBLETYPE a_Nibble)
+	{
+		if (
+			(a_RelX >= cChunkDef::Width)  || (a_RelX < 0) ||
+			(a_RelY >= cChunkDef::Height) || (a_RelY < 0) ||
+			(a_RelZ >= cChunkDef::Width)  || (a_RelZ < 0)
+		)
+		{
+			ASSERT(!"cChunkBuffer::SetMeta(): index out of range!");
+			return;
+		}
+
+		int Section = a_RelY / CHUNK_SECTION_HEIGHT;
+		if(!m_Sections[Section])
+		{
+			m_Sections[Section] = Allocate();
+			if(!m_Sections[Section])
+			{
+				ASSERT("Failed to allocate a new section in Chunkbuffer");
+				return;
+			}
+		}
+		int Index = cChunkDef::MakeIndexNoCheck(a_RelX, a_RelY - (Section * CHUNK_SECTION_HEIGHT), a_RelZ);
+		m_Sections[Section]->m_BlockMeta[Index / 2] = static_cast<NIBBLETYPE>(
+			(m_Sections[Section]->m_BlockMeta[Index / 2] & (0xf0 >> ((Index & 1) * 4))) |  // The untouched nibble
+			((a_Nibble & 0x0f) << ((Index & 1) * 4))  // The nibble being set
+		);
+	}
+	
+	NIBBLETYPE GetBlockLight(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 / CHUNK_SECTION_HEIGHT;
+			if(m_Sections[Section])
+			{
+				int Index = cChunkDef::MakeIndexNoCheck(a_RelX, a_RelY - (Section * CHUNK_SECTION_HEIGHT), a_RelZ);
+				return (m_Sections[Section]->m_BlockLight[Index / 2] >> ((Index & 1) * 4)) & 0x0f;
+			}
+			else
+			{
+				return 0;
+			}
+		}
+		ASSERT(!"cChunkBuffer::GetMeta(): coords out of chunk range!");
+		return 0;
+	}
+	
+	NIBBLETYPE 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 / CHUNK_SECTION_HEIGHT;
+			if(m_Sections[Section])
+			{
+				int Index = cChunkDef::MakeIndexNoCheck(a_RelX, a_RelY - (Section * CHUNK_SECTION_HEIGHT), a_RelZ);
+				return (m_Sections[Section]->m_BlockLight[Index / 2] >> ((Index & 1) * 4)) & 0x0f;
+			}
+			else
+			{
+				return 0xFF;
+			}
+		}
+		ASSERT(!"cChunkBuffer::GetMeta(): coords out of chunk range!");
+		return 0;
+	}
+	
+	cChunkBuffer Copy() const;
+	void CopyBlocks   (BLOCKTYPE * a_dest, size_t a_Idx = 0, size_t length = cChunkDef::NumBlocks)  const;
+	void CopyMeta     (NIBBLETYPE * a_dest) const;
+	void CopyLight    (NIBBLETYPE * a_dest) const;
+	void CopySkyLight (NIBBLETYPE * a_dest) const;
+	
+	void SetBlocks    (const BLOCKTYPE * a_src);
+	void SetMeta      (const NIBBLETYPE * a_src);
+	void SetLight     (const NIBBLETYPE * a_src);
+	void SetSkyLight  (const NIBBLETYPE * a_src);
+	
+private:
+
+	#if __cplusplus < 201103L
+	// auto_ptr style interface for memory management
+	bool IsOwner;
+	#endif
+	
+	struct sChunkSection {
+		BLOCKTYPE  m_BlockTypes   [CHUNK_SECTION_HEIGHT * 16 * 16]    ;
+		NIBBLETYPE m_BlockMeta    [CHUNK_SECTION_HEIGHT * 16 * 16 / 2];
+		NIBBLETYPE m_BlockLight   [CHUNK_SECTION_HEIGHT * 16 * 16 / 2];
+		NIBBLETYPE m_BlockSkyLight[CHUNK_SECTION_HEIGHT * 16 * 16 / 2];
+	};
+	
+	sChunkSection *m_Sections[CHUNK_SECTION_NUM];
+	
+	sChunkSection * Allocate() const;
+};
+
+
+
+
+/** A simple implementation of the cChunkDataCallback interface that collects all block data into a buffer
+*/
+class cChunkBufferCollector :
+	public cChunkDataCallback
+{
+public:
+
+	cChunkBuffer m_BlockData;
+
+protected:
+
+	virtual void ChunkBuffer(const cChunkBuffer & a_BlockData) override
+	{
+		m_BlockData = a_BlockData.Copy();
+	}
+};
+
+
+/** A simple implementation of the cChunkDataCallback interface that collects all block data into a single buffer
+*/
+class cChunkDataCollector :
+public cChunkDataCallback
+{
+public:
+
+	// Must be unsigned char instead of BLOCKTYPE or NIBBLETYPE, because it houses both.
+	unsigned char m_BlockData[cChunkDef::BlockDataSize];
+
+protected:
+
+	virtual void ChunkBuffer(const cChunkBuffer & a_ChunkBuffer) override
+	{
+		a_ChunkBuffer.CopyBlocks(m_BlockData);
+		a_ChunkBuffer.CopyMeta(m_BlockData + cChunkDef::NumBlocks);
+		a_ChunkBuffer.CopyLight(m_BlockData + 3 * cChunkDef::NumBlocks / 2);
+		a_ChunkBuffer.CopySkyLight(m_BlockData + 2 * cChunkDef::NumBlocks);
+	}
+};
+
+/** A simple implementation of the cChunkDataCallback interface that collects all block data into a separate buffers
+*/
+class cChunkDataSeparateCollector :
+public cChunkDataCallback
+{
+public:
+
+	cChunkDef::BlockTypes m_BlockTypes;
+	cChunkDef::BlockNibbles m_BlockMetas;
+	cChunkDef::BlockNibbles m_BlockLight;
+	cChunkDef::BlockNibbles m_BlockSkyLight;
+
+protected:
+
+	virtual void ChunkBuffer(const cChunkBuffer & a_ChunkBuffer) override
+	{
+	a_ChunkBuffer.CopyBlocks(m_BlockTypes);
+	a_ChunkBuffer.CopyMeta(m_BlockMetas);
+	a_ChunkBuffer.CopyLight(m_BlockLight);
+	a_ChunkBuffer.CopySkyLight(m_BlockSkyLight);
+	}
+} ;
+
+
+
+
diff --git a/src/ChunkDef.h b/src/ChunkDef.h
index bb9f14bbe..a5eccc9d6 100644
--- a/src/ChunkDef.h
+++ b/src/ChunkDef.h
@@ -366,6 +366,7 @@ public:
 
 
 
+class cChunkBuffer;
 
 
 /** Interface class used for getting data out of a chunk using the GetAllData() function.
@@ -390,20 +391,11 @@ public:
 	/// Called once to provide biome data
 	virtual void BiomeData    (const cChunkDef::BiomeMap * a_BiomeMap) {UNUSED(a_BiomeMap); };
 	
-	/// Called once to export block types
-	virtual void BlockTypes   (const BLOCKTYPE * a_Type) {UNUSED(a_Type); };
+	/// Called once to let know if the chunk lighting is valid. Return value is ignored
+	virtual void LightIsValid(bool a_IsLightValid) {UNUSED(a_IsLightValid); };
 	
-	/// Called once to export block meta
-	virtual void BlockMeta    (const NIBBLETYPE * a_Meta) {UNUSED(a_Meta); };
-	
-	/// Called once to let know if the chunk lighting is valid. Return value is used to control if BlockLight() and BlockSkyLight() are called next (if true)
-	virtual bool LightIsValid(bool a_IsLightValid) {UNUSED(a_IsLightValid); return true; };
-
-	/// Called once to export block light
-	virtual void BlockLight   (const NIBBLETYPE * a_BlockLight) {UNUSED(a_BlockLight); };
-	
-	/// Called once to export sky light
-	virtual void BlockSkyLight(const NIBBLETYPE * a_SkyLight) {UNUSED(a_SkyLight); };
+	/// Called once to export block info
+	virtual void ChunkBuffer   (const cChunkBuffer & a_Buffer) {UNUSED(a_Buffer); };
 	
 	/// Called for each entity in the chunk
 	virtual void Entity(cEntity * a_Entity) {UNUSED(a_Entity); };
@@ -416,88 +408,6 @@ public:
 
 
 
-/** A simple implementation of the cChunkDataCallback interface that collects all block data into a single buffer
-*/
-class cChunkDataCollector :
-	public cChunkDataCallback
-{
-public:
-
-	// Must be unsigned char instead of BLOCKTYPE or NIBBLETYPE, because it houses both.
-	unsigned char m_BlockData[cChunkDef::BlockDataSize];
-
-protected:
-
-	virtual void BlockTypes(const BLOCKTYPE * a_BlockTypes) override
-	{
-		memcpy(m_BlockData, a_BlockTypes, sizeof(cChunkDef::BlockTypes));
-	}
-
-
-	virtual void BlockMeta(const NIBBLETYPE * a_BlockMeta) override
-	{
-		memcpy(m_BlockData + cChunkDef::NumBlocks, a_BlockMeta, cChunkDef::NumBlocks / 2);
-	}
-
-
-	virtual void BlockLight(const NIBBLETYPE * a_BlockLight) override
-	{
-		memcpy(m_BlockData + 3 * cChunkDef::NumBlocks / 2, a_BlockLight, cChunkDef::NumBlocks / 2);
-	}
-
-
-	virtual void BlockSkyLight(const NIBBLETYPE * a_BlockSkyLight) override
-	{
-		memcpy(m_BlockData + 2 * cChunkDef::NumBlocks, a_BlockSkyLight, cChunkDef::NumBlocks / 2);
-	}
-} ;
-
-
-
-
-
-/** A simple implementation of the cChunkDataCallback interface that collects all block data into a separate buffers
-*/
-class cChunkDataSeparateCollector :
-	public cChunkDataCallback
-{
-public:
-
-	cChunkDef::BlockTypes   m_BlockTypes;
-	cChunkDef::BlockNibbles m_BlockMetas;
-	cChunkDef::BlockNibbles m_BlockLight;
-	cChunkDef::BlockNibbles m_BlockSkyLight;
-
-protected:
-
-	virtual void BlockTypes(const BLOCKTYPE * a_BlockTypes) override
-	{
-		memcpy(m_BlockTypes, a_BlockTypes, sizeof(m_BlockTypes));
-	}
-
-
-	virtual void BlockMeta(const NIBBLETYPE * a_BlockMeta) override
-	{
-		memcpy(m_BlockMetas, a_BlockMeta, sizeof(m_BlockMetas));
-	}
-
-
-	virtual void BlockLight(const NIBBLETYPE * a_BlockLight) override
-	{
-		memcpy(m_BlockLight, a_BlockLight, sizeof(m_BlockLight));
-	}
-
-
-	virtual void BlockSkyLight(const NIBBLETYPE * a_BlockSkyLight) override
-	{
-		memcpy(m_BlockSkyLight, a_BlockSkyLight, sizeof(m_BlockSkyLight));
-	}
-} ;
-
-
-
-
-
 /** Interface class used for comparing clients of two chunks.
 Used primarily for entity moving while both chunks are locked.
 */
diff --git a/src/ChunkMap.cpp b/src/ChunkMap.cpp
index e695f0ab2..2b47f25f8 100644
--- a/src/ChunkMap.cpp
+++ b/src/ChunkMap.cpp
@@ -219,9 +219,8 @@ bool cChunkMap::LockedGetBlock(int a_BlockX, int a_BlockY, int a_BlockZ, BLOCKTY
 		return false;
 	}
 	
-	int Index = cChunkDef::MakeIndexNoCheck(a_BlockX, a_BlockY, a_BlockZ);
-	a_BlockType = Chunk->GetBlock(Index);
-	a_BlockMeta = Chunk->GetMeta(Index);
+	a_BlockType = Chunk->GetBlock(a_BlockX, a_BlockY, a_BlockZ);
+	a_BlockMeta = Chunk->GetMeta(a_BlockX, a_BlockY, a_BlockZ);
 	return true;
 }
 
@@ -242,8 +241,7 @@ bool cChunkMap::LockedGetBlockType(int a_BlockX, int a_BlockY, int a_BlockZ, BLO
 		return false;
 	}
 	
-	int Index = cChunkDef::MakeIndexNoCheck(a_BlockX, a_BlockY, a_BlockZ);
-	a_BlockType = Chunk->GetBlock(Index);
+	a_BlockType = Chunk->GetBlock(a_BlockX, a_BlockY, a_BlockZ);
 	return true;
 }
 
@@ -264,8 +262,7 @@ bool cChunkMap::LockedGetBlockMeta(int a_BlockX, int a_BlockY, int a_BlockZ, NIB
 		return false;
 	}
 	
-	int Index = cChunkDef::MakeIndexNoCheck(a_BlockX, a_BlockY, a_BlockZ);
-	a_BlockMeta = Chunk->GetMeta(Index);
+	a_BlockMeta = Chunk->GetMeta(a_BlockX, a_BlockY, a_BlockZ);
 	return true;
 }
 
@@ -1486,9 +1483,8 @@ bool cChunkMap::GetBlocks(sSetBlockVector & a_Blocks, bool a_ContinueOnFailure)
 			res = false;
 			continue;
 		}
-		int idx = cChunkDef::MakeIndexNoCheck(itr->x, itr->y, itr->z);
-		itr->BlockType = Chunk->GetBlock(idx);
-		itr->BlockMeta = Chunk->GetMeta(idx);
+		itr->BlockType = Chunk->GetBlock(itr->x, itr->y, itr->z);
+		itr->BlockMeta = Chunk->GetMeta(itr->x, itr->y, itr->z);
 	}
 	return res;
 }
diff --git a/src/ChunkSender.h b/src/ChunkSender.h
index a26f764a7..81b298a55 100644
--- a/src/ChunkSender.h
+++ b/src/ChunkSender.h
@@ -27,6 +27,7 @@ Note that it may be called by world's BroadcastToChunk() if the client is still
 
 #include "OSSupport/IsThread.h"
 #include "ChunkDef.h"
+#include "ChunkBuffer.h"
 
 
 
diff --git a/src/Entities/FallingBlock.cpp b/src/Entities/FallingBlock.cpp
index a66c7e4ae..e57c45eaf 100644
--- a/src/Entities/FallingBlock.cpp
+++ b/src/Entities/FallingBlock.cpp
@@ -55,9 +55,8 @@ void cFallingBlock::Tick(float a_Dt, cChunk & a_Chunk)
 		return;
 	}
 	
-	int idx = a_Chunk.MakeIndexNoCheck(BlockX - a_Chunk.GetPosX() * cChunkDef::Width, BlockY, BlockZ - a_Chunk.GetPosZ() * cChunkDef::Width);
-	BLOCKTYPE BlockBelow = a_Chunk.GetBlock(idx);
-	NIBBLETYPE BelowMeta = a_Chunk.GetMeta(idx);
+	BLOCKTYPE BlockBelow = a_Chunk.GetBlock(BlockX - a_Chunk.GetPosX() * cChunkDef::Width, BlockY, BlockZ - a_Chunk.GetPosZ() * cChunkDef::Width);
+	NIBBLETYPE BelowMeta = a_Chunk.GetMeta(BlockX - a_Chunk.GetPosX() * cChunkDef::Width, BlockY, BlockZ - a_Chunk.GetPosZ() * cChunkDef::Width);
 	if (cSandSimulator::DoesBreakFallingThrough(BlockBelow, BelowMeta))
 	{
 		// Fallen onto a block that breaks this into pickups (e. g. half-slab)
diff --git a/src/LightingThread.cpp b/src/LightingThread.cpp
index 302473d71..56d5dba22 100644
--- a/src/LightingThread.cpp
+++ b/src/LightingThread.cpp
@@ -18,20 +18,17 @@
 class cReader :
 	public cChunkDataCallback
 {
-	virtual void BlockTypes(const BLOCKTYPE * a_Type) override
+	virtual void ChunkBuffer(const cChunkBuffer & a_ChunkBuffer) override
 	{
-		// ROW is a block of 16 Blocks, one whole row is copied at a time (hopefully the compiler will optimize that)
-		// C++ doesn't permit copying arrays, but arrays as a part of a struct is ok :)
-		typedef struct {BLOCKTYPE m_Row[16]; } ROW;
-		ROW * InputRows = (ROW *)a_Type;
-		ROW * OutputRows = (ROW *)m_BlockTypes;
+		BLOCKTYPE * OutputRows = m_BlockTypes;
 		int InputIdx = 0;
 		int OutputIdx = m_ReadingChunkX + m_ReadingChunkZ * cChunkDef::Width * 3;
 		for (int y = 0; y < cChunkDef::Height; y++)
 		{
 			for (int z = 0; z < cChunkDef::Width; z++)
 			{
-				OutputRows[OutputIdx] = InputRows[InputIdx++];
+				a_ChunkBuffer.CopyBlocks(OutputRows + OutputIdx * 16, InputIdx * 16, 16);
+				InputIdx++;
 				OutputIdx += 3;
 			}  // for z
 			// Skip into the next y-level in the 3x3 chunk blob; each level has cChunkDef::Width * 9 rows
diff --git a/src/MobProximityCounter.cpp b/src/MobProximityCounter.cpp
index 6c44ea458..e7493dd0f 100644
--- a/src/MobProximityCounter.cpp
+++ b/src/MobProximityCounter.cpp
@@ -24,7 +24,8 @@ void cMobProximityCounter::CollectMob(cEntity& a_Monster, cChunk& a_Chunk, doubl
 		if (a_Distance < it->second.m_Distance)
 		{
 			it->second.m_Distance = a_Distance;
-			it->second.m_Chunk = a_Chunk;
+			ASSERT(false);
+			//it->second.m_Chunk = a_Chunk;
 		}
 	}
 
diff --git a/src/Simulator/FireSimulator.cpp b/src/Simulator/FireSimulator.cpp
index 470dfc791..4c1008897 100644
--- a/src/Simulator/FireSimulator.cpp
+++ b/src/Simulator/FireSimulator.cpp
@@ -95,8 +95,10 @@ void cFireSimulator::SimulateChunk(float a_Dt, int a_ChunkX, int a_ChunkZ, cChun
 	int NumMSecs = (int)a_Dt;
 	for (cCoordWithIntList::iterator itr = Data.begin(); itr != Data.end();)
 	{
-		int idx = cChunkDef::MakeIndexNoCheck(itr->x, itr->y, itr->z);
-		BLOCKTYPE BlockType = a_Chunk->GetBlock(idx);
+		int x = itr->x;
+		int y = itr->y;
+		int z = itr->z;
+		BLOCKTYPE BlockType = a_Chunk->GetBlock(x,y,z);
 
 		if (!IsAllowedBlock(BlockType))
 		{
@@ -125,7 +127,7 @@ void cFireSimulator::SimulateChunk(float a_Dt, int a_ChunkX, int a_ChunkZ, cChun
 			itr->x + a_ChunkX * cChunkDef::Width, itr->y, itr->z + a_ChunkZ * cChunkDef::Width
 		);
 		*/
-		NIBBLETYPE BlockMeta = a_Chunk->GetMeta(idx);
+		NIBBLETYPE BlockMeta = a_Chunk->GetMeta(x, y, z);
 		if (BlockMeta == 0x0f)
 		{
 			// The fire burnt out completely
@@ -140,7 +142,7 @@ void cFireSimulator::SimulateChunk(float a_Dt, int a_ChunkX, int a_ChunkZ, cChun
 
 		if((itr->y > 0) && (!DoesBurnForever(a_Chunk->GetBlock(itr->x, itr->y - 1, itr->z))))
 		{
-			a_Chunk->SetMeta(idx, BlockMeta + 1);
+			a_Chunk->SetMeta(x, y, z, BlockMeta + 1);
 		}
 		itr->Data = GetBurnStepTime(a_Chunk, itr->x, itr->y, itr->z);  // TODO: Add some randomness into this
 	}  // for itr - Data[]
diff --git a/src/WorldStorage/NBTChunkSerializer.cpp b/src/WorldStorage/NBTChunkSerializer.cpp
index 415693ae2..10acfb537 100644
--- a/src/WorldStorage/NBTChunkSerializer.cpp
+++ b/src/WorldStorage/NBTChunkSerializer.cpp
@@ -692,10 +692,9 @@ void cNBTChunkSerializer::AddMinecartChestContents(cMinecartWithChest * a_Mineca
 
 
 
-bool cNBTChunkSerializer::LightIsValid(bool a_IsLightValid)
+void cNBTChunkSerializer::LightIsValid(bool a_IsLightValid)
 {
 	m_IsLightValid = a_IsLightValid;
-	return a_IsLightValid;  // We want lighting only if it's valid, otherwise don't bother
 }
 
 
diff --git a/src/WorldStorage/NBTChunkSerializer.h b/src/WorldStorage/NBTChunkSerializer.h
index 51d104970..6da2bc6dd 100644
--- a/src/WorldStorage/NBTChunkSerializer.h
+++ b/src/WorldStorage/NBTChunkSerializer.h
@@ -9,7 +9,7 @@
 
 #pragma once
 
-#include "../ChunkDef.h"
+#include "../ChunkBuffer.h"
 
 
 
@@ -121,7 +121,7 @@ protected:
 	void AddMinecartChestContents(cMinecartWithChest * a_Minecart);
 	
 	// cChunkDataSeparateCollector overrides:
-	virtual bool LightIsValid(bool a_IsLightValid) override;
+	virtual void LightIsValid(bool a_IsLightValid) override;
 	virtual void BiomeData(const cChunkDef::BiomeMap * a_BiomeMap) override;
 	virtual void Entity(cEntity * a_Entity) override;
 	virtual void BlockEntity(cBlockEntity * a_Entity) override;
diff --git a/src/WorldStorage/WSSCompact.cpp b/src/WorldStorage/WSSCompact.cpp
index bb9d4b9e6..b44dd02c5 100644
--- a/src/WorldStorage/WSSCompact.cpp
+++ b/src/WorldStorage/WSSCompact.cpp
@@ -107,15 +107,13 @@ void cJsonChunkSerializer::BlockEntity(cBlockEntity * a_BlockEntity)
 
 
 
-bool cJsonChunkSerializer::LightIsValid(bool a_IsLightValid)
+void cJsonChunkSerializer::LightIsValid(bool a_IsLightValid)
 {
-	if (!a_IsLightValid)
+	if (a_IsLightValid)
 	{
-		return false;
+		m_Root["IsLightValid"] = true;
+		m_HasJsonData = true;
 	}
-	m_Root["IsLightValid"] = true;
-	m_HasJsonData = true;
-	return true;
 }
 
 
diff --git a/src/WorldStorage/WSSCompact.h b/src/WorldStorage/WSSCompact.h
index 4df146ec3..49a897984 100644
--- a/src/WorldStorage/WSSCompact.h
+++ b/src/WorldStorage/WSSCompact.h
@@ -14,6 +14,7 @@
 #include "WorldStorage.h"
 #include "../Vector3.h"
 #include "json/json.h"
+#include "ChunkBuffer.h"
 
 
 
@@ -42,7 +43,7 @@ protected:
 	// cChunkDataCollector overrides:
 	virtual void Entity       (cEntity *      a_Entity) override;
 	virtual void BlockEntity  (cBlockEntity * a_Entity) override;
-	virtual bool LightIsValid (bool a_IsLightValid) override;
+	virtual void LightIsValid (bool a_IsLightValid) override;
 } ;