1 files changed, 321 insertions, 0 deletions

diff --git a/source/Chunk.h b/source/Chunk.h
new file mode 100644
index 000000000..c9d1e0899
--- /dev/null
+++ b/source/Chunk.h
@@ -0,0 +1,321 @@
+
+#pragma once
+
+#include "Entity.h"
+#include "ChunkDef.h"
+
+
+
+
+
+#define C_CHUNK_USE_INLINE 1
+
+// Do not touch
+#if C_CHUNK_USE_INLINE
+	#define __C_CHUNK_INLINE__ inline
+#else
+	#define __C_CHUNK_INLINE__
+#endif
+
+
+
+
+
+namespace Json
+{
+	class Value;
+};
+
+
+
+
+
+class cWorld;
+class cFurnaceEntity;
+class cClientHandle;
+class cServer;
+class MTRand;
+class cPlayer;
+class cChunkMap;
+class cChestEntity;
+class cFurnaceEntity;
+class cBlockArea;
+class cPawn;
+class cPickup;
+class cChunkDataSerializer;
+
+typedef std::list<cClientHandle *>  cClientHandleList;
+typedef cItemCallback<cEntity>        cEntityCallback;
+typedef cItemCallback<cChestEntity>   cChestCallback;
+typedef cItemCallback<cFurnaceEntity> cFurnaceCallback;
+
+
+
+
+// This class is not to be used directly
+// Instead, call actions on cChunkMap (such as cChunkMap::SetBlock() etc.)
+class cChunk :
+	public cChunkDef  // The inheritance is "misused" here only to inherit the functions and constants defined in cChunkDef
+{
+public:
+	cChunk(int a_ChunkX, int a_ChunkY, int a_ChunkZ, cChunkMap * a_ChunkMap, cWorld * a_World);
+	~cChunk();
+
+	bool IsValid(void) const {return m_IsValid; }  // Returns true if the chunk block data is valid (loaded / generated)
+	void SetValid(void);                           // Also wakes up any calls to cChunkMap::GetHeight()
+	void MarkRegenerating(void);                   // Marks all clients attached to this chunk as wanting this chunk
+	bool IsDirty(void) const {return m_IsDirty; }  // Returns true if the chunk has changed since it was last saved
+	bool HasLoadFailed(void) const {return m_HasLoadFailed; }  // Returns true if the chunk failed to load and hasn't been generated since then
+	bool CanUnload(void);
+	
+	bool IsLightValid(void) const {return m_IsLightValid; }
+	
+	/*
+	To save a chunk, the WSSchema must:
+	1. Mark the chunk as being saved (MarkSaving() )
+	2. Get the chunk's data using GetAllData()
+	3. Mark the chunk as saved (MarkSaved() )
+	If anywhere inside this sequence another thread mmodifies the chunk, the chunk will not get marked as saved in MarkSaved()
+	*/
+	void MarkSaving(void);  // Marks the chunk as being saved. 
+	void MarkSaved(void);  // Marks the chunk as saved, if it didn't change from the last call to MarkSaving()
+	void MarkLoaded(void);  // Marks the chunk as freshly loaded. Fails if the chunk is already valid
+	void MarkLoadFailed(void);  // Marks the chunk as failed to load. Ignored is the chunk is already valid
+	
+	/// Gets all chunk data, calls the a_Callback's methods for each data type
+	void GetAllData(cChunkDataCallback & a_Callback);
+	
+	/// Sets all chunk data
+	void SetAllData(
+		const BLOCKTYPE *  a_BlockTypes, 
+		const NIBBLETYPE * a_BlockMeta,
+		const NIBBLETYPE * a_BlockLight,
+		const NIBBLETYPE * a_BlockSkyLight,
+		const cChunkDef::HeightMap * a_HeightMap,
+		const cChunkDef::BiomeMap &  a_BiomeMap,
+		cEntityList & a_Entities, 
+		cBlockEntityList & a_BlockEntities
+	);
+	
+	void SetLight(
+		const cChunkDef::BlockNibbles & a_BlockLight,
+		const cChunkDef::BlockNibbles & a_SkyLight
+	);
+	
+	/// Copies m_BlockData into a_BlockTypes, only the block types
+	void GetBlockTypes(BLOCKTYPE  * a_BlockTypes);
+	
+	/// Copies entire block data into a_BlockData, the entire 4 arrays (Type, Meta, Light, SkyLight)
+	void GetBlockData(BLOCKTYPE  * a_BlockData);
+	
+	/// Returns true if there is a block entity at the coords specified
+	bool HasBlockEntityAt(int a_BlockX, int a_BlockY, int a_BlockZ);
+	
+	/// Sets or resets the internal flag that prevents chunk from being unloaded
+	void Stay(bool a_Stay = true);
+	
+	void Tick(float a_Dt, MTRand & a_TickRandom);
+
+	int GetPosX() { return m_PosX; }
+	int GetPosY() { return m_PosY; }
+	int GetPosZ() { return m_PosZ; }
+	cWorld * GetWorld() { return m_World; }
+
+	// OBSOLETE void SendTo( cClientHandle * a_Client );
+
+	void SetBlock(int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta );
+	// SetBlock() does a lot of work (heightmap, tickblocks, blockentities) so a BlockIdx version doesn't make sense
+	void SetBlock( const Vector3i & a_RelBlockPos, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta ) { SetBlock( a_RelBlockPos.x, a_RelBlockPos.y, a_RelBlockPos.z, a_BlockType, a_BlockMeta ); }
+	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_X, int a_Y, int a_Z );
+	BLOCKTYPE GetBlock( int a_BlockIdx );
+	void GetBlockTypeMeta(int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE & a_BlockType, NIBBLETYPE & a_BlockMeta);
+	
+	EMCSBiome GetBiomeAt(int a_RelX, int a_RelZ) const {return cChunkDef::GetBiome(m_BiomeMap, a_RelX, a_RelZ); }
+	
+	void CollectPickupsByPlayer(cPlayer * a_Player);
+	void UpdateSign(int a_PosX, int a_PosY, int a_PosZ, const AString & a_Line1, const AString & a_Line2, const AString & a_Line3, const AString & a_Line4);  // Also sends update packets to all clients in the chunk
+
+	int  GetHeight( int a_X, int a_Z );
+
+	void SendBlockTo(int a_RelX, int a_RelY, int a_RelZ, cClientHandle * a_Client);
+
+	/// Adds a client to the chunk; returns true if added, false if already there
+	bool AddClient    (cClientHandle* a_Client );
+	
+	void RemoveClient (cClientHandle* a_Client );
+	bool HasClient    (cClientHandle* a_Client );
+	bool HasAnyClients(void);  // Returns true if theres any client in the chunk; false otherwise
+
+	void AddEntity( cEntity * a_Entity);
+	void RemoveEntity( cEntity * a_Entity);
+	
+	/// Calls the callback for each entity; returns true if all entities processed, false if the callback aborted by returning true
+	bool ForEachEntity(cEntityCallback & a_Callback);  // Lua-accessible
+
+	/// Calls the callback for each chest; returns true if all chests processed, false if the callback aborted by returning true
+	bool ForEachChest(cChestCallback & a_Callback);  // Lua-accessible
+
+	/// Calls the callback for each furnace; returns true if all furnaces processed, false if the callback aborted by returning true
+	bool ForEachFurnace(cFurnaceCallback & a_Callback);  // Lua-accessible
+	
+	/// Calls the callback for the chest at the specified coords; returns false if there's no chest at those coords, true if found
+	bool DoWithChestAt(int a_BlockX, int a_BlockY, int a_BlockZ, cChestCallback & a_Callback);  // Lua-acessible
+
+	/// Calls the callback for the furnace at the specified coords; returns false if there's no furnace at those coords, true if found
+	bool DoWithFurnaceAt(int a_BlockX, int a_BlockY, int a_BlockZ, cFurnaceCallback & a_Callback);  // Lua-accessible
+
+	/// 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);  // Lua-accessible
+
+	void UseBlockEntity(cPlayer * a_Player, int a_X, int a_Y, int a_Z);  // [x, y, z] in world block coords
+
+	void CalculateLighting(); // Recalculate right now
+	void CalculateHeightmap();
+
+	void BroadcastPlayerAnimation(const cPlayer & a_Player, char a_Animation, const cClientHandle * a_Exclude = NULL);
+	void BroadcastEntityEquipment(const cEntity & a_Entity, short a_SlotNum, const cItem & a_Item, const cClientHandle * a_Exclude = NULL);
+	void BroadcastEntRelMoveLook (const cEntity & a_Entity, char a_RelX, char a_RelY, char a_RelZ, const cClientHandle * a_Exclude = NULL);
+	void BroadcastEntRelMove     (const cEntity & a_Entity, char a_RelX, char a_RelY, char a_RelZ, const cClientHandle * a_Exclude = NULL);
+	void BroadcastEntLook        (const cEntity & a_Entity, const cClientHandle * a_Exclude = NULL);
+	void BroadcastEntHeadLook    (const cEntity & a_Entity, 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 = NULL);
+	void BroadcastDestroyEntity  (const cEntity & a_Entity, const cClientHandle * a_Exclude = NULL);
+	void BroadcastEntityStatus   (const cEntity & a_Entity, char a_Status, const cClientHandle * a_Exclude = NULL);
+	void BroadcastMetadata       (const cPawn & a_Pawn, const cClientHandle * a_Exclude = NULL);
+	void BroadcastSpawn          (cEntity & a_Entity, const cClientHandle * a_Exclude = NULL);
+	void BroadcastBlockEntity    (int a_BlockX, int a_BlockY, int a_BlockZ, const cClientHandle * a_Exclude = NULL);
+	void BroadcastCollectPickup  (const cPickup & a_Pickup, const cPlayer & a_Player, const cClientHandle * a_Exclude = NULL);
+	void BroadcastThunderbolt    (int a_BlockX, int a_BlockY, int a_BlockZ, const cClientHandle * a_Exclude = NULL);
+	void BroadcastSoundEffect    (const AString & a_SoundName, int a_SrcX, int a_SrcY, int a_SrcZ, float a_Volume, float a_Pitch, const cClientHandle * a_Exclude = NULL);  // a_Src coords are Block * 8
+	void BroadcastChunkData      (cChunkDataSerializer & a_Serializer, const cClientHandle * a_Exclude = NULL);
+	
+	void SendBlockEntity         (int a_BlockX, int a_BlockY, int a_BlockZ, cClientHandle & a_Client);
+
+	Vector3i PositionToWorldPosition(const Vector3i & a_RelPos)
+	{
+		return PositionToWorldPosition(a_RelPos.x, a_RelPos.y, a_RelPos.z);
+	}
+	
+	void     PositionToWorldPosition(int a_RelX, int a_RelY, int a_RelZ, int & a_BlockX, int & a_BlockY, int & a_BlockZ);
+	Vector3i PositionToWorldPosition(int a_RelX, int a_RelY, int a_RelZ );
+
+	inline void MarkDirty(void)
+	{
+		m_IsDirty = true;
+		m_IsSaving = false;
+	}
+	
+	/// Sets the blockticking to start at the specified block. Only one blocktick may be set, second call overwrites the first call
+	inline void SetNextBlockTick(int a_RelX, int a_RelY, int a_RelZ)
+	{
+		m_BlockTickX = a_RelX;
+		m_BlockTickY = a_RelY;
+		m_BlockTickZ = a_RelZ;
+	}
+	
+	inline NIBBLETYPE GetMeta(int a_RelX, int a_RelY, int a_RelZ)                    {return cChunkDef::GetNibble(m_BlockMeta, a_RelX, a_RelY, a_RelZ); }
+	inline NIBBLETYPE GetMeta(int a_BlockIdx)                                        {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 NIBBLETYPE GetLight(int a_RelX, int a_RelY, int a_RelZ)    {return cChunkDef::GetNibble(m_BlockLight, a_RelX, a_RelY, a_RelZ); }
+	inline NIBBLETYPE GetSkyLight(int a_RelX, int a_RelY, int a_RelZ) {return cChunkDef::GetNibble(m_BlockSkyLight, a_RelX, a_RelY, a_RelZ); }
+
+private:
+
+	friend class cChunkMap;
+	
+	bool m_IsValid;        // True if the chunk is loaded / generated
+	bool m_IsLightValid;   // True if the blocklight and skylight are calculated
+	bool m_IsDirty;        // True if the chunk has changed since it was last saved
+	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
+	
+	cCriticalSection            m_CSBlockLists;
+	std::deque< unsigned int >  m_ToTickBlocks;
+	std::vector< unsigned int > m_PendingSendBlocks;
+	
+	// A critical section is not needed, because all chunk access is protected by its parent ChunkMap's csLayers
+	cClientHandleList  m_LoadedByClient;
+	cClientHandleList  m_UnloadQuery;
+	cEntityList        m_Entities;
+	cBlockEntityList   m_BlockEntities;
+	
+	/// Number of times the chunk has been requested to stay (by various cChunkStay objects); if zero, the chunk can be unloaded
+	int m_StayCount;
+
+	int m_PosX, m_PosY, m_PosZ;
+	cWorld *    m_World;
+	cChunkMap * m_ChunkMap;
+
+	// TODO: Make these pointers and don't allocate what isn't needed
+	BLOCKTYPE  m_BlockTypes   [cChunkDef::NumBlocks];
+	NIBBLETYPE m_BlockMeta    [cChunkDef::NumBlocks / 2];
+	NIBBLETYPE m_BlockLight   [cChunkDef::NumBlocks / 2];
+	NIBBLETYPE m_BlockSkyLight[cChunkDef::NumBlocks / 2];
+
+	cChunkDef::HeightMap m_HeightMap;
+	cChunkDef::BiomeMap  m_BiomeMap;
+
+	int m_BlockTickX, m_BlockTickY, m_BlockTickZ;
+
+	void RemoveBlockEntity( cBlockEntity* a_BlockEntity );
+	void AddBlockEntity( cBlockEntity* a_BlockEntity );
+	cBlockEntity * GetBlockEntity( int a_X, int a_Y, int a_Z );
+	cBlockEntity * GetBlockEntity( const Vector3i & a_BlockPos ) { return GetBlockEntity( a_BlockPos.x, a_BlockPos.y, a_BlockPos.z ); }
+
+	void SpreadLightOfBlock(NIBBLETYPE * a_LightBuffer, int a_X, int a_Y, int a_Z, char a_Falloff);
+
+	void CreateBlockEntities(void);
+	
+	// Makes a copy of the list
+	cClientHandleList GetAllClients(void) const {return m_LoadedByClient; }
+
+	/// Sends m_PendingSendBlocks to all clients
+	void BroadcastPendingBlockChanges(void);
+	
+	/// Checks the block scheduled for checking in m_ToTickBlocks[]
+	void CheckBlocks(void);
+	
+	void TickBlocks      (MTRand & a_TickRandom);
+	void TickGrass       (int a_RelX, int a_RelY, int a_RelZ, MTRand & a_TickRandom);
+	void TickMelonPumpkin(int a_RelX, int a_RelY, int a_RelZ, int a_BlockIdx, BLOCKTYPE a_BlockType, MTRand & a_TickRandom);
+	void TickFarmland    (int a_RelX, int a_RelY, int a_RelZ);
+	
+	/// Grows sugarcane by the specified number of blocks, but no more than 3 blocks high (used by both bonemeal and ticking)
+	void GrowSugarcane   (int a_RelX, int a_RelY, int a_RelZ, int a_NumBlocks);
+	
+	/// Grows cactus by the specified number of blocks, but no more than 3 blocks high (used by both bonemeal and ticking)
+	void GrowCactus      (int a_RelX, int a_RelY, int a_RelZ, int a_NumBlocks);
+
+	/// Grows a melon or a pumpkin next to the block specified (assumed to be the stem)
+	void GrowMelonPumpkin(int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE a_BlockType, MTRand & a_Random);
+	
+	/// Checks if a leaves block at the specified coords has a log up to 4 blocks away connected by other leaves blocks (false if no log)
+	bool HasNearLog(cBlockArea & a_Area, int a_BlockX, int a_BlockY, int a_BlockZ);
+	
+	/// Same as GetBlock(), but relative coords needn't be in this chunk (uses m_ChunkMap in such a case); returns true on success; only usable in Tick()
+	bool UnboundedRelGetBlock(int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE & a_BlockType, NIBBLETYPE & a_BlockMeta);
+	
+	/// Same as SetBlock(), but relative coords needn't be in this chunk (uses m_ChunkMap in such a case); returns true on success; only usable in Tick()
+	bool UnboundedRelSetBlock(int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta);
+
+	/// Same as FastSetBlock(), but relative coords needn't be in this chunk (uses m_ChunkMap in such a case); returns true on success; only usable in Tick()
+	bool UnboundedRelFastSetBlock(int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta);
+};
+
+typedef cChunk * cChunkPtr;
+
+typedef std::list<cChunkPtr> cChunkPtrList;
+
+
+
+
+
+#if C_CHUNK_USE_INLINE
+	#include "Chunk.inl.h"
+#endif
+
+
+
+