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#pragma once
/** Place this macro in the declaration of each cBlockEntity descendant. */
#define BLOCKENTITY_PROTODEF(classname) \
virtual bool IsA(const char * a_ClassName) const override \
{ \
return ((a_ClassName != nullptr) && ((strcmp(a_ClassName, #classname) == 0) || Super::IsA(a_ClassName))); \
} \
virtual const char * GetClass() const override \
{ \
return #classname; \
} \
static const char * GetClassStatic() \
{ \
return #classname; \
} \
virtual const char * GetParentClass() const override \
{ \
return Super::GetClass(); \
}
class cChunk;
class cItems;
class cPlayer;
class cWorld;
class cBlockEntity;
using OwnedBlockEntity = std::unique_ptr<cBlockEntity>;
using cBlockEntities = std::unordered_map<size_t, OwnedBlockEntity>;
// tolua_begin
class cBlockEntity
{
protected:
cBlockEntity(BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta, Vector3i a_Pos, cWorld * a_World) :
m_Pos(a_Pos),
m_RelX(a_Pos.x - cChunkDef::Width * FAST_FLOOR_DIV(a_Pos.x, cChunkDef::Width)),
m_RelZ(a_Pos.z - cChunkDef::Width * FAST_FLOOR_DIV(a_Pos.z, cChunkDef::Width)),
m_BlockType(a_BlockType),
m_BlockMeta(a_BlockMeta),
m_World(a_World)
{
}
public:
// tolua_end
virtual ~cBlockEntity() {} // force a virtual destructor in all descendants
virtual void Destroy() {}
void SetWorld(cWorld * a_World)
{
m_World = a_World;
}
/** Updates the internally stored position.
Note that this should not ever be used for world-contained block entities, it is meant only for when BEs in a cBlockArea are manipulated.
Asserts that the block entity is not assigned to a world. */
void SetPos(Vector3i a_NewPos);
/** Returns true if the specified blocktype is supposed to have an associated block entity. */
static bool IsBlockEntityBlockType(BLOCKTYPE a_BlockType);
/** Creates a new block entity for the specified block type at the specified absolute pos.
If a_World is valid, then the entity is created bound to that world
Returns nullptr for unknown block types. */
static OwnedBlockEntity CreateByBlockType(BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta, Vector3i a_Pos, cWorld * a_World = nullptr);
/** Makes an exact copy of this block entity, except for its m_World (set to nullptr), and at a new position.
Uses CopyFrom() to copy the properties. */
OwnedBlockEntity Clone(Vector3i a_Pos);
/** Returns the contents of this block entity that it would drop if broken.
Note that the block itself is not included; that's handled by the block handler. */
virtual cItems ConvertToPickups() const;
/** Copies all properties of a_Src into this entity, except for its m_World and location.
Each non-abstract descendant should override to copy its specific properties, and call
Super::CopyFrom(a_Src) to copy the common ones. */
virtual void CopyFrom(const cBlockEntity & a_Src);
static const char * GetClassStatic() // Needed for ManualBindings's ForEach templates
{
return "cBlockEntity";
}
/** Returns true if the object is the specified class, or its descendant. */
virtual bool IsA(const char * a_ClassName) const { return (strcmp(a_ClassName, "cBlockEntity") == 0); }
/** Returns the name of the topmost class (the most descendant). Used for Lua bindings to push the correct object type. */
virtual const char * GetClass() const { return GetClassStatic(); }
/** Returns the name of the parent class, or empty string if no parent class. */
virtual const char * GetParentClass() const { return ""; }
// tolua_begin
// Position, in absolute block coordinates:
Vector3i GetPos() const { return m_Pos; }
int GetPosX() const { return m_Pos.x; }
int GetPosY() const { return m_Pos.y; }
int GetPosZ() const { return m_Pos.z; }
Vector3i GetRelPos() const { return Vector3i(m_RelX, m_Pos.y, m_RelZ); }
BLOCKTYPE GetBlockType() const { return m_BlockType; }
cWorld * GetWorld() const { return m_World; }
int GetChunkX() const { return FAST_FLOOR_DIV(m_Pos.x, cChunkDef::Width); }
int GetChunkZ() const { return FAST_FLOOR_DIV(m_Pos.y, cChunkDef::Width); }
int GetRelX() const { return m_RelX; }
int GetRelZ() const { return m_RelZ; }
// tolua_end
/** Called when a player uses this entity; should open the UI window.
returns true if the use was successful, return false to use the block as a "normal" block */
virtual bool UsedBy( cPlayer * a_Player) = 0;
/** Sends the packet defining the block entity to the client specified.
To send to all eligible clients, use cWorld::BroadcastBlockEntity() */
virtual void SendTo(cClientHandle & a_Client) = 0;
/** Ticks the entity; returns true if the chunk should be marked as dirty as a result of this ticking. By default does nothing. */
virtual bool Tick(std::chrono::milliseconds a_Dt, cChunk & a_Chunk)
{
UNUSED(a_Dt);
return false;
}
protected:
/** Position in absolute block coordinates */
Vector3i m_Pos;
/** Position relative to the chunk, used to speed up ticking */
int m_RelX, m_RelZ;
/** The blocktype representing this particular instance in the world.
Mainly used for multi-block-type entities, such as furnaces / lit furnaces. */
BLOCKTYPE m_BlockType;
/** The block meta representing this particular instance in the world
Mainly used for directional entities, such as dispensers. */
NIBBLETYPE m_BlockMeta;
cWorld * m_World;
} ; // tolua_export
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