1 files changed, 2732 insertions, 0 deletions

diff --git a/src/Chunk.cpp b/src/Chunk.cpp
new file mode 100644
index 000000000..1c937c894
--- /dev/null
+++ b/src/Chunk.cpp
@@ -0,0 +1,2732 @@
+
+#include "Globals.h"  // NOTE: MSVC stupidness requires this to be the same across all modules
+
+#ifndef _WIN32
+	#include <cstdlib>
+#endif
+
+
+#include "Chunk.h"
+#include "World.h"
+#include "ClientHandle.h"
+#include "Server.h"
+#include "zlib.h"
+#include "Defines.h"
+#include "BlockEntities/ChestEntity.h"
+#include "BlockEntities/DispenserEntity.h"
+#include "BlockEntities/DropperEntity.h"
+#include "BlockEntities/FurnaceEntity.h"
+#include "BlockEntities/HopperEntity.h"
+#include "BlockEntities/JukeboxEntity.h"
+#include "BlockEntities/NoteEntity.h"
+#include "BlockEntities/SignEntity.h"
+#include "Entities/Pickup.h"
+#include "Item.h"
+#include "Noise.h"
+#include "Root.h"
+#include "MersenneTwister.h"
+#include "Entities/Player.h"
+#include "BlockArea.h"
+#include "PluginManager.h"
+#include "Blocks/BlockHandler.h"
+#include "Simulator/FluidSimulator.h"
+#include "MobCensus.h"
+#include "MobSpawner.h"
+
+
+#include <json/json.h>
+
+
+
+
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// sSetBlock:
+
+sSetBlock::sSetBlock( int a_BlockX, int a_BlockY, int a_BlockZ, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta )  // absolute block position
+	: x( a_BlockX )
+	, y( a_BlockY )
+	, z( a_BlockZ )
+	, BlockType( a_BlockType )
+	, BlockMeta( a_BlockMeta )
+{
+	cChunkDef::AbsoluteToRelative(x, y, z, ChunkX, ChunkZ);
+}
+
+
+
+
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// cChunk:
+
+cChunk::cChunk(
+	int a_ChunkX, int a_ChunkY, int a_ChunkZ, 
+	cChunkMap * a_ChunkMap, cWorld * a_World,
+	cChunk * a_NeighborXM, cChunk * a_NeighborXP, cChunk * a_NeighborZM, cChunk * a_NeighborZP
+)
+	: m_PosX( a_ChunkX )
+	, m_PosY( a_ChunkY )
+	, m_PosZ( a_ChunkZ )
+	, m_BlockTickX( 0 )
+	, m_BlockTickY( 0 )
+	, m_BlockTickZ( 0 )
+	, m_World( a_World )
+	, m_ChunkMap(a_ChunkMap)
+	, m_IsValid(false)
+	, m_IsLightValid(false)
+	, m_IsDirty(false)
+	, m_IsSaving(false)
+	, m_StayCount(0)
+	, m_NeighborXM(a_NeighborXM)
+	, m_NeighborXP(a_NeighborXP)
+	, m_NeighborZM(a_NeighborZM)
+	, m_NeighborZP(a_NeighborZP)
+	, m_WaterSimulatorData(a_World->GetWaterSimulator()->CreateChunkData())
+	, m_LavaSimulatorData (a_World->GetLavaSimulator ()->CreateChunkData())
+{
+	if (a_NeighborXM != NULL)
+	{
+		a_NeighborXM->m_NeighborXP = this;
+	}
+	if (a_NeighborXP != NULL)
+	{
+		a_NeighborXP->m_NeighborXM = this;
+	}
+	if (a_NeighborZM != NULL)
+	{
+		a_NeighborZM->m_NeighborZP = this;
+	}
+	if (a_NeighborZP != NULL)
+	{
+		a_NeighborZP->m_NeighborZM = this;
+	}
+}
+
+
+
+
+
+cChunk::~cChunk()
+{
+	cPluginManager::Get()->CallHookChunkUnloaded(m_World, m_PosX, m_PosZ);
+	
+	// LOGINFO("### delete cChunk() (%i, %i) from %p, thread 0x%x ###", m_PosX, m_PosZ, this, GetCurrentThreadId() );
+	
+	for (cBlockEntityList::iterator itr = m_BlockEntities.begin(); itr != m_BlockEntities.end(); ++itr)
+	{
+		delete *itr;
+	}
+	m_BlockEntities.clear();
+
+	// Remove and destroy all entities that are not players:
+	cEntityList Entities;
+	std::swap(Entities, m_Entities);  // Need another list because cEntity destructors check if they've been removed from chunk
+	for (cEntityList::const_iterator itr = Entities.begin(); itr != Entities.end(); ++itr)
+	{
+		if (!(*itr)->IsPlayer())
+		{
+			(*itr)->Destroy(false);
+			delete *itr;
+		}
+	}
+	
+	if (m_NeighborXM != NULL)
+	{
+		m_NeighborXM->m_NeighborXP = NULL;
+	}
+	if (m_NeighborXP != NULL)
+	{
+		m_NeighborXP->m_NeighborXM = NULL;
+	}
+	if (m_NeighborZM != NULL)
+	{
+		m_NeighborZM->m_NeighborZP = NULL;
+	}
+	if (m_NeighborZP != NULL)
+	{
+		m_NeighborZP->m_NeighborZM = NULL;
+	}
+	delete m_WaterSimulatorData;
+	delete m_LavaSimulatorData;
+}
+
+
+
+
+
+void cChunk::SetValid(void)
+{
+	m_IsValid = true;
+	
+	m_World->GetChunkMap()->ChunkValidated();
+}
+
+
+
+
+
+void cChunk::MarkRegenerating(void)
+{
+	// Tell all clients attached to this chunk that they want this chunk:
+	for (cClientHandleList::iterator itr = m_LoadedByClient.begin(); itr != m_LoadedByClient.end(); ++itr)
+	{
+		(*itr)->AddWantedChunk(m_PosX, m_PosZ);
+	}  // for itr - m_LoadedByClient[]
+}
+
+
+
+
+
+bool cChunk::CanUnload(void)
+{
+	return m_LoadedByClient.empty() && !m_IsDirty && (m_StayCount == 0);
+}
+
+
+
+
+
+void cChunk::MarkSaving(void)
+{
+	m_IsSaving = true;
+}
+
+
+
+
+
+void cChunk::MarkSaved(void)
+{
+	if (!m_IsSaving)
+	{
+		return;
+	}
+	m_IsDirty = false;
+}
+
+
+
+
+
+void cChunk::MarkLoaded(void)
+{
+	m_IsDirty = false;
+	SetValid();
+}
+
+
+
+
+
+void cChunk::MarkLoadFailed(void)
+{
+	if (m_IsValid)
+	{
+		return;
+	}
+	
+	m_HasLoadFailed = true;
+}
+
+
+
+
+
+void cChunk::GetAllData(cChunkDataCallback & a_Callback)
+{
+	a_Callback.HeightMap    (&m_HeightMap);
+	a_Callback.BiomeData    (&m_BiomeMap);
+	a_Callback.BlockTypes   (m_BlockTypes);
+	a_Callback.BlockMeta    (m_BlockMeta);
+	a_Callback.LightIsValid (m_IsLightValid);
+	a_Callback.BlockLight   (m_BlockLight);
+	a_Callback.BlockSkyLight(m_BlockSkyLight);
+	
+	for (cEntityList::iterator itr = m_Entities.begin(); itr != m_Entities.end(); ++itr)
+	{
+		a_Callback.Entity(*itr);
+	}
+	
+	for (cBlockEntityList::iterator itr = m_BlockEntities.begin(); itr != m_BlockEntities.end(); ++itr)
+	{
+		a_Callback.BlockEntity(*itr);
+	}
+}
+
+
+
+
+
+void cChunk::SetAllData(
+	const BLOCKTYPE *  a_BlockTypes, 
+	const NIBBLETYPE * a_BlockMeta,
+	const NIBBLETYPE * a_BlockLight,
+	const NIBBLETYPE * a_BlockSkyLight,
+	const HeightMap *  a_HeightMap,
+	const BiomeMap &   a_BiomeMap,
+	cBlockEntityList & a_BlockEntities
+)
+{
+	memcpy(m_BiomeMap, a_BiomeMap, sizeof(m_BiomeMap));
+	
+	if (a_HeightMap != NULL)
+	{
+		memcpy(m_HeightMap, a_HeightMap, sizeof(m_HeightMap));
+	}
+	
+	memcpy(m_BlockTypes, a_BlockTypes, sizeof(m_BlockTypes));
+	memcpy(m_BlockMeta,  a_BlockMeta,  sizeof(m_BlockMeta));
+	if (a_BlockLight != NULL)
+	{
+		memcpy(m_BlockLight, a_BlockLight, sizeof(m_BlockLight));
+	}
+	if (a_BlockSkyLight != NULL)
+	{
+		memcpy(m_BlockSkyLight, a_BlockSkyLight, sizeof(m_BlockSkyLight));
+	}
+	
+	m_IsLightValid = (a_BlockLight != NULL) && (a_BlockSkyLight != NULL);
+	
+	if (a_HeightMap == NULL)
+	{
+		CalculateHeightmap();
+	}
+
+	// Clear the block entities present - either the loader / saver has better, or we'll create empty ones:
+	for (cBlockEntityList::iterator itr = m_BlockEntities.begin(); itr != m_BlockEntities.end(); ++itr)
+	{
+		delete *itr;
+	}
+	std::swap(a_BlockEntities, m_BlockEntities);
+	
+	// Set all block entities' World variable:
+	for (cBlockEntityList::iterator itr = m_BlockEntities.begin(); itr != m_BlockEntities.end(); ++itr)
+	{
+		(*itr)->SetWorld(m_World);
+	}
+	
+	// Create block entities that the loader didn't load; fill them with defaults
+	CreateBlockEntities();
+	
+	// Set the chunk data as valid. This may be needed for some simulators that perform actions upon block adding (Vaporize)
+	SetValid();
+	
+	// Wake up all simulators for their respective blocks:
+	WakeUpSimulators();
+
+	m_HasLoadFailed = false;
+}
+
+
+
+
+
+void cChunk::SetLight(
+	const cChunkDef::BlockNibbles & a_BlockLight,
+	const cChunkDef::BlockNibbles & a_SkyLight
+)
+{
+	// 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 :)
+	memcpy(m_BlockLight,    a_BlockLight, sizeof(m_BlockLight));
+	memcpy(m_BlockSkyLight, a_SkyLight,   sizeof(m_BlockSkyLight));
+	m_IsLightValid = true;
+}
+
+
+
+
+
+void cChunk::GetBlockTypes(BLOCKTYPE * a_BlockTypes)
+{
+	memcpy(a_BlockTypes, m_BlockTypes, NumBlocks);
+}
+
+
+
+
+
+void cChunk::WriteBlockArea(cBlockArea & a_Area, int a_MinBlockX, int a_MinBlockY, int a_MinBlockZ, int a_DataTypes)
+{
+	if ((a_DataTypes & (cBlockArea::baTypes | cBlockArea::baMetas)) != (cBlockArea::baTypes | cBlockArea::baMetas))
+	{
+		LOGWARNING("cChunk::WriteBlockArea(): unsupported datatype request, can write only types + metas (0x%x), requested 0x%x. Ignoring.",
+			(cBlockArea::baTypes | cBlockArea::baMetas), a_DataTypes & (cBlockArea::baTypes | cBlockArea::baMetas)
+		);
+		return;
+	}
+	
+	// SizeX, SizeZ are the dimensions of the block data to copy to the chunk (size of the geometric union)
+
+	int BlockStartX = std::max(a_MinBlockX, m_PosX * cChunkDef::Width);
+	int BlockEndX   = std::min(a_MinBlockX + a_Area.GetSizeX(), (m_PosX + 1) * cChunkDef::Width);
+	int BlockStartZ = std::max(a_MinBlockZ, m_PosZ * cChunkDef::Width);
+	int BlockEndZ   = std::min(a_MinBlockZ + a_Area.GetSizeZ(), (m_PosZ + 1) * cChunkDef::Width);
+	int SizeX = BlockEndX - BlockStartX;
+	int SizeZ = BlockEndZ - BlockStartZ;
+	int OffX = BlockStartX - m_PosX * cChunkDef::Width;
+	int OffZ = BlockStartZ - m_PosZ * cChunkDef::Width;
+	int BaseX = BlockStartX - a_MinBlockX;
+	int BaseZ = BlockStartZ - a_MinBlockZ;
+	int SizeY = a_Area.GetSizeY();
+
+	// TODO: Improve this by not calling FastSetBlock() and doing the processing here
+	// so that the heightmap is touched only once for each column.
+	BLOCKTYPE *  AreaBlockTypes = a_Area.GetBlockTypes();
+	NIBBLETYPE * AreaBlockMetas = a_Area.GetBlockMetas();
+	for (int y = 0; y < SizeY; y++)
+	{
+		int ChunkY = a_MinBlockY + y;
+		int AreaY = y;
+		for (int z = 0; z < SizeZ; z++)
+		{
+			int ChunkZ = OffZ + z;
+			int AreaZ = BaseZ + z;
+			for (int x = 0; x < SizeX; x++)
+			{
+				int ChunkX = OffX + x;
+				int AreaX = BaseX + x;
+				int idx = a_Area.MakeIndex(AreaX, AreaY, AreaZ);
+				BLOCKTYPE BlockType = AreaBlockTypes[idx];
+				NIBBLETYPE BlockMeta = AreaBlockMetas[idx];
+				FastSetBlock(ChunkX, ChunkY, ChunkZ, BlockType, BlockMeta);
+			}  // for x
+		}  // for z
+	}  // for y
+}
+
+
+
+
+
+/// Returns true if there is a block entity at the coords specified
+bool cChunk::HasBlockEntityAt(int a_BlockX, int a_BlockY, int a_BlockZ)
+{
+	for (cBlockEntityList::iterator itr = m_BlockEntities.begin(); itr != m_BlockEntities.end(); ++itr)
+	{
+		if (
+			((*itr)->GetPosX() == a_BlockX) &&
+			((*itr)->GetPosY() == a_BlockY) &&
+			((*itr)->GetPosZ() == a_BlockZ)
+		)
+		{
+			return true;
+		}
+	}  // for itr - m_BlockEntities[]
+	return false;
+}
+
+
+
+
+
+/// Sets or resets the internal flag that prevents chunk from being unloaded
+void cChunk::Stay(bool a_Stay)
+{
+	m_StayCount += (a_Stay ? 1 : -1);
+	ASSERT(m_StayCount >= 0);
+}
+
+
+
+
+void cChunk::CollectMobCensus(cMobCensus& toFill)
+{
+	toFill.CollectSpawnableChunk(*this);
+	std::list<const Vector3d*> playerPositions;
+	cPlayer* currentPlayer;
+	for (cClientHandleList::iterator itr = m_LoadedByClient.begin(), end = m_LoadedByClient.end(); itr != end; ++itr)
+	{
+		currentPlayer = (*itr)->GetPlayer();
+		playerPositions.push_back(&(currentPlayer->GetPosition()));
+	} 
+
+	Vector3d currentPosition;
+	for (cEntityList::iterator itr = m_Entities.begin(); itr != m_Entities.end(); ++itr)
+	{
+		//LOGD("Counting entity #%i (%s)", (*itr)->GetUniqueID(), (*itr)->GetClass());
+		if ((*itr)->IsMob())
+		{
+			cMonster& Monster = (cMonster&)(**itr);
+			currentPosition = Monster.GetPosition();
+			for (std::list<const Vector3d*>::const_iterator itr2 = playerPositions.begin(); itr2 != playerPositions.end(); itr2 ++)
+			{
+				toFill.CollectMob(Monster,*this,(currentPosition-**itr2).SqrLength());
+			}
+		}
+	}  // for itr - m_Entitites[]
+}
+
+
+
+
+void cChunk::getThreeRandomNumber(int& a_X, int& a_Y, int& a_Z,int a_MaxX, int a_MaxY, int a_MaxZ)
+{
+	ASSERT(a_MaxX * a_MaxY * a_MaxZ * 8 < 0x00ffffff);
+	int Random = m_World->GetTickRandomNumber(0x00ffffff);
+	a_X =   Random % (a_MaxX * 2);
+	a_Y =  (Random / (a_MaxX * 2)) % (a_MaxY * 2);
+	a_Z = ((Random / (a_MaxX * 2)) / (a_MaxY * 2)) % (a_MaxZ * 2);
+	a_X /= 2;
+	a_Y /= 2;
+	a_Z /= 2;
+}
+
+
+
+
+
+void cChunk::getRandomBlockCoords(int& a_X, int& a_Y, int& a_Z)
+{
+	// MG TODO : check if this kind of optimization (only one random call) is still needed
+	// MG TODO : if so propagate it
+
+	getThreeRandomNumber(a_X, a_Y, a_Z, Width, Height-2, Width);
+	a_Y++;
+}
+
+
+
+
+
+void cChunk::SpawnMobs(cMobSpawner& a_MobSpawner)
+{
+	int Center_X,Center_Y,Center_Z;
+	getRandomBlockCoords(Center_X,Center_Y,Center_Z);
+
+	BLOCKTYPE PackCenterBlock = GetBlock(Center_X, Center_Y, Center_Z);
+	if (a_MobSpawner.CheckPackCenter(PackCenterBlock))
+	{
+		a_MobSpawner.NewPack();
+		int NumberOfTries = 0;
+		int NumberOfSuccess = 0;
+		int MaxNbOfSuccess = 4; // this can be changed during the process for Wolves and Ghass
+		while (NumberOfTries < 12 && NumberOfSuccess < MaxNbOfSuccess)
+		{
+			const int HorizontalRange = 20; // MG TODO : relocate
+			const int VerticalRange = 0; // MG TODO : relocate
+			int Try_X, Try_Y, Try_Z;
+			getThreeRandomNumber(Try_X, Try_Y, Try_Z, 2*HorizontalRange+1 , 2*VerticalRange+1 , 2*HorizontalRange+1);
+			Try_X -= HorizontalRange;
+			Try_Y -= VerticalRange;
+			Try_Z -= HorizontalRange;
+			Try_X += Center_X;
+			Try_Y += Center_Y;
+			Try_Z += Center_Z;
+
+			ASSERT(Try_Y > 0);
+			ASSERT(Try_Y < cChunkDef::Height-1);
+			
+			EMCSBiome Biome = m_ChunkMap->GetBiomeAt (Try_X, Try_Z);
+			// MG TODO :
+			// Moon cycle (for slime)
+			// check player and playerspawn presence < 24 blocks
+			// check mobs presence on the block
+
+			// MG TODO : check that "Level" really means Y
+			
+			NIBBLETYPE SkyLight = 0;
+
+			NIBBLETYPE BlockLight = 0;
+
+			if (IsLightValid())
+			{
+				cEntity* newMob = a_MobSpawner.TryToSpawnHere(this, Try_X, Try_Y, Try_Z, Biome, MaxNbOfSuccess);
+				if (newMob)
+				{
+					int WorldX, WorldY, WorldZ;
+					PositionToWorldPosition(Try_X, Try_Y, Try_Z, WorldX, WorldY, WorldZ);
+					double ActualX = WorldX + 0.5;
+					double ActualZ = WorldZ + 0.5;
+					newMob->SetPosition(ActualX, WorldY, ActualZ);
+					LOGD("Spawning %s #%i at %d,%d,%d",newMob->GetClass(),newMob->GetUniqueID(),WorldX, WorldY, WorldZ);
+					NumberOfSuccess++;
+				}
+			}
+			
+			NumberOfTries++;
+		}
+	}
+
+}
+
+
+
+
+
+void cChunk::Tick(float a_Dt)
+{
+	BroadcastPendingBlockChanges();
+
+	// Unload the chunk from all clients that have queued unloading:
+	for (cClientHandleList::iterator itr = m_UnloadQuery.begin(), end = m_UnloadQuery.end(); itr != end; ++itr)
+	{
+		(*itr)->SendUnloadChunk(m_PosX, m_PosZ);
+	}
+	m_UnloadQuery.clear();
+	
+	// Set all blocks that have been queued for setting later:
+	ProcessQueuedSetBlocks();
+
+	CheckBlocks();
+	
+	// Tick simulators:
+	m_World->GetSimulatorManager()->SimulateChunk(a_Dt, m_PosX, m_PosZ, this);
+	
+	TickBlocks();
+
+	// Tick all block entities in this chunk:
+	for (cBlockEntityList::iterator itr = m_BlockEntities.begin(); itr != m_BlockEntities.end(); ++itr)
+	{
+		m_IsDirty = (*itr)->Tick(a_Dt, *this) | m_IsDirty;
+	}
+	
+	// Tick all entities in this chunk (except mobs):
+	for (cEntityList::iterator itr = m_Entities.begin(); itr != m_Entities.end(); ++itr)
+	{
+		// Mobs are tickes inside MobTick (as we don't have to tick them if they are far away from players)
+		if (!((*itr)->IsMob()))
+		{
+			(*itr)->Tick(a_Dt, *this);
+		}
+	}  // for itr - m_Entitites[]
+	
+	// Remove all entities that were scheduled for removal:
+	for (cEntityList::iterator itr = m_Entities.begin(); itr != m_Entities.end();)
+	{
+			if ((*itr)->IsDestroyed())
+			{
+				LOGD("Destroying entity #%i (%s)", (*itr)->GetUniqueID(), (*itr)->GetClass());
+				cEntity * ToDelete = *itr;
+				itr = m_Entities.erase(itr);
+				delete ToDelete;
+				continue;
+			}
+			itr++;
+	}  // for itr - m_Entitites[]
+	
+	// If any entity moved out of the chunk, move it to the neighbor:
+	for (cEntityList::iterator itr = m_Entities.begin(); itr != m_Entities.end();)
+	{
+		if (
+			((*itr)->GetChunkX() != m_PosX) ||
+			((*itr)->GetChunkZ() != m_PosZ)
+		)
+		{
+			MoveEntityToNewChunk(*itr);
+			itr = m_Entities.erase(itr);
+		}
+		else
+		{
+			++itr;
+		}
+	}
+	
+	ApplyWeatherToTop();
+}
+
+
+
+
+
+void cChunk::MoveEntityToNewChunk(cEntity * a_Entity)
+{
+	cChunk * Neighbor = GetNeighborChunk(a_Entity->GetChunkX() * cChunkDef::Width, a_Entity->GetChunkZ() * cChunkDef::Width);
+	if (Neighbor == NULL)
+	{
+		Neighbor = m_ChunkMap->GetChunkNoLoad(a_Entity->GetChunkX(), ZERO_CHUNK_Y, a_Entity->GetChunkZ());
+		if (Neighbor == NULL)
+		{
+			// TODO: What to do with this?
+			LOGWARNING("%s: Failed to move entity, destination chunk unreachable. Entity lost", __FUNCTION__);
+			return;
+		}
+	}
+
+	ASSERT(Neighbor != this);  // Moving into the same chunk? wtf?
+	
+	Neighbor->AddEntity(a_Entity);
+
+	class cMover :
+		public cClientDiffCallback
+	{
+		virtual void Removed(cClientHandle * a_Client) override
+		{
+			a_Client->SendDestroyEntity(*m_Entity);
+		}
+
+		virtual void Added(cClientHandle * a_Client) override
+		{
+			m_Entity->SpawnOn(*a_Client);
+		}
+
+		cEntity * m_Entity;
+
+	public:
+		cMover(cEntity * a_Entity) :
+			m_Entity(a_Entity)
+		{}
+	} Mover(a_Entity);
+	
+	m_ChunkMap->CompareChunkClients(this, Neighbor, Mover);
+}
+
+
+
+
+
+void cChunk::ProcessQueuedSetBlocks(void)
+{
+	Int64 CurrTick = m_World->GetWorldAge();
+	for (sSetBlockQueueVector::iterator itr = m_SetBlockQueue.begin(); itr != m_SetBlockQueue.end();)
+	{
+		if (itr->m_Tick < CurrTick)
+		{
+			// Not yet
+			++itr;
+			continue;
+		}
+		else
+		{
+			// Now is the time to set the block
+			SetBlock(itr->m_RelX, itr->m_RelY, itr->m_RelZ, itr->m_BlockType, itr->m_BlockMeta);
+			itr = m_SetBlockQueue.erase(itr);
+		}
+	}  // for itr - m_SetBlockQueue[]
+}
+
+
+
+
+
+void cChunk::BroadcastPendingBlockChanges(void)
+{
+	if (m_PendingSendBlocks.empty())
+	{
+		return;
+	}
+	
+	for (cClientHandleList::iterator itr = m_LoadedByClient.begin(), end = m_LoadedByClient.end(); itr != end; ++itr)
+	{
+		(*itr)->SendBlockChanges(m_PosX, m_PosZ, m_PendingSendBlocks);
+	}
+	m_PendingSendBlocks.clear();
+}
+
+
+
+
+
+void cChunk::CheckBlocks(void)
+{
+	if (m_ToTickBlocks.size() == 0)
+	{
+		return;
+	}
+	std::vector<unsigned int> ToTickBlocks;
+	std::swap(m_ToTickBlocks, ToTickBlocks);
+	
+	for (std::vector<unsigned int>::const_iterator itr = ToTickBlocks.begin(), end = ToTickBlocks.end(); itr != end; ++itr)
+	{
+		unsigned int index = (*itr);
+		Vector3i BlockPos = IndexToCoordinate(index);
+
+		cBlockHandler * Handler = BlockHandler(GetBlock(index));
+		Handler->Check(BlockPos.x, BlockPos.y, BlockPos.z, *this);
+	}  // for itr - ToTickBlocks[]
+}
+
+
+
+
+
+void cChunk::TickBlocks(void)
+{
+	// Tick dem blocks
+	// _X: We must limit the random number or else we get a nasty int overflow bug ( http://forum.mc-server.org/showthread.php?tid=457 )
+	int RandomX = m_World->GetTickRandomNumber(0x00ffffff);
+	int RandomY = m_World->GetTickRandomNumber(0x00ffffff);
+	int RandomZ = m_World->GetTickRandomNumber(0x00ffffff);
+	int TickX = m_BlockTickX;
+	int TickY = m_BlockTickY;
+	int TickZ = m_BlockTickZ;
+
+	// This for loop looks disgusting, but it actually does a simple thing - first processes m_BlockTick, then adds random to it
+	// This is so that SetNextBlockTick() works
+	for (int i = 0; i < 50; i++,
+	
+		// This weird construct (*2, then /2) is needed,
+		// otherwise the blocktick distribution is too biased towards even coords!
+		
+		TickX = (TickX + RandomX) % (Width * 2),
+		TickY = (TickY + RandomY) % (Height * 2),
+		TickZ = (TickZ + RandomZ) % (Width * 2),
+		m_BlockTickX = TickX / 2,
+		m_BlockTickY = TickY / 2,
+		m_BlockTickZ = TickZ / 2
+	)
+	{
+
+		if (m_BlockTickY > cChunkDef::GetHeight(m_HeightMap, m_BlockTickX, m_BlockTickZ))
+		{
+			continue; // It's all air up here
+		}
+
+		unsigned int Index = MakeIndexNoCheck(m_BlockTickX, m_BlockTickY, m_BlockTickZ);
+		cBlockHandler * Handler = BlockHandler(m_BlockTypes[Index]);
+		ASSERT(Handler != NULL);  // Happenned on server restart, FS #243
+		Handler->OnUpdate(m_World, m_BlockTickX + m_PosX * Width, m_BlockTickY, m_BlockTickZ + m_PosZ * Width);
+	}  // for i - tickblocks
+}
+
+
+
+
+
+void cChunk::ApplyWeatherToTop()
+{
+	if (
+		(m_World->GetTickRandomNumber(100) != 0) ||
+		(
+			(m_World->GetWeather() != eWeather_Rain) &&
+			(m_World->GetWeather() != eWeather_ThunderStorm)
+		)
+	)
+	{
+		// Not the right weather, or not at this tick; bail out
+		return;
+	}
+	
+	int X = m_World->GetTickRandomNumber(15);
+	int Z = m_World->GetTickRandomNumber(15);
+	switch (GetBiomeAt(X, Z))
+	{
+		case biTaiga:
+		case biFrozenOcean:
+		case biFrozenRiver:
+		case biIcePlains:
+		case biIceMountains:
+		case biTaigaHills:
+		{
+			// TODO: Check light levels, don't snow over when the BlockLight is higher than (7?)
+			int Height = GetHeight(X, Z);
+			BLOCKTYPE TopBlock = GetBlock(X, Height, Z);
+			NIBBLETYPE TopMeta = GetMeta (X, Height, Z);
+			if (m_World->IsDeepSnowEnabled() && (TopBlock == E_BLOCK_SNOW))
+			{
+				int MaxSize = 7;
+				BLOCKTYPE  BlockType[4];
+				NIBBLETYPE BlockMeta[4];
+				UnboundedRelGetBlock(X - 1, Height, Z,     BlockType[0], BlockMeta[0]);
+				UnboundedRelGetBlock(X + 1, Height, Z,     BlockType[1], BlockMeta[1]);
+				UnboundedRelGetBlock(X,     Height, Z - 1, BlockType[2], BlockMeta[2]);
+				UnboundedRelGetBlock(X,     Height, Z + 1, BlockType[3], BlockMeta[3]);
+				for (int i = 0; i < 4; i++)
+				{
+					switch (BlockType[i])
+					{
+						case E_BLOCK_AIR:
+						{
+							MaxSize = 0;
+							break;
+						}
+						case E_BLOCK_SNOW:
+						{
+							MaxSize = std::min(BlockMeta[i] + 1, MaxSize);
+							break;
+						}
+					}
+				}
+				if (TopMeta < MaxSize)
+				{
+					FastSetBlock(X, Height, Z, E_BLOCK_SNOW, TopMeta + 1);
+				}
+				else if (TopMeta > MaxSize)
+				{
+					FastSetBlock(X, Height, Z, E_BLOCK_SNOW, TopMeta - 1);
+				}
+			}
+			else if (g_BlockIsSnowable[TopBlock])
+			{
+				SetBlock(X, Height + 1, Z, E_BLOCK_SNOW, 0);
+			}
+			else if ((TopBlock == E_BLOCK_WATER) || (TopBlock == E_BLOCK_STATIONARY_WATER))
+			{
+				SetBlock(X, Height, Z, E_BLOCK_ICE, 0);
+			}
+			else if (
+					(m_World->IsDeepSnowEnabled()) && 
+					(
+						(TopBlock == E_BLOCK_RED_ROSE) ||
+						(TopBlock == E_BLOCK_YELLOW_FLOWER) ||
+						(TopBlock == E_BLOCK_RED_MUSHROOM) ||
+						(TopBlock == E_BLOCK_BROWN_MUSHROOM)
+					)
+				)
+			{
+				SetBlock(X, Height, Z, E_BLOCK_SNOW, 0);
+			}
+			break;
+		}  // case (snowy biomes)
+		
+		// TODO: Rainy biomes should check for farmland and cauldrons
+	}  // switch (biome)
+}
+
+
+
+
+
+void cChunk::GrowMelonPumpkin(int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE a_BlockType, MTRand & a_TickRandom)
+{
+	// Convert the stem BlockType into produce BlockType
+	BLOCKTYPE ProduceType;
+	switch (a_BlockType)
+	{
+		case E_BLOCK_MELON_STEM:   ProduceType = E_BLOCK_MELON;   break;
+		case E_BLOCK_PUMPKIN_STEM: ProduceType = E_BLOCK_PUMPKIN; break;
+		default:
+		{
+			ASSERT(!"Unhandled blocktype in TickMelonPumpkin()");
+			return;
+		}
+	}
+
+	// Check if there's another melon / pumpkin around that stem, if so, abort:
+	bool IsValid;
+	BLOCKTYPE BlockType[4];
+	NIBBLETYPE BlockMeta;  // unused
+	IsValid =            UnboundedRelGetBlock(a_RelX + 1, a_RelY, a_RelZ,     BlockType[0], BlockMeta);
+	IsValid = IsValid && UnboundedRelGetBlock(a_RelX - 1, a_RelY, a_RelZ,     BlockType[1], BlockMeta);
+	IsValid = IsValid && UnboundedRelGetBlock(a_RelX,     a_RelY, a_RelZ + 1, BlockType[2], BlockMeta);
+	IsValid = IsValid && UnboundedRelGetBlock(a_RelX,     a_RelY, a_RelZ - 1, BlockType[3], BlockMeta);
+	if (
+		!IsValid || 
+		(BlockType[0] == ProduceType) || 
+		(BlockType[1] == ProduceType) || 
+		(BlockType[2] == ProduceType) || 
+		(BlockType[3] == ProduceType)
+	)
+	{
+		// Neighbors not valid or already taken by the same produce
+		return;
+	}
+	
+	// Pick a direction in which to place the produce:
+	int x = 0, z = 0;
+	int CheckType = a_TickRandom.randInt(3);  // The index to the neighbors array which should be checked for emptiness
+	switch (CheckType)
+	{
+		case 0: x =  1; break;
+		case 1: x = -1; break;
+		case 2: z =  1; break;
+		case 3: z = -1; break;
+	}
+	
+	// Check that the block in that direction is empty:
+	switch (BlockType[CheckType])
+	{
+		case E_BLOCK_AIR:
+		case E_BLOCK_SNOW:
+		case E_BLOCK_TALL_GRASS:
+		case E_BLOCK_DEAD_BUSH:
+		{
+			break;
+		}
+		default: return;
+	}
+	
+	// Check if there's soil under the neighbor. We already know the neighbors are valid. Place produce if ok
+	BLOCKTYPE Soil;
+	UnboundedRelGetBlock(a_RelX + x, a_RelY - 1, a_RelZ + z, Soil, BlockMeta);
+	switch (Soil)
+	{
+		case E_BLOCK_DIRT:
+		case E_BLOCK_GRASS:
+		case E_BLOCK_FARMLAND:
+		{
+			// DEBUG: This is here to catch FS #349 - melons growing over other crops.
+			LOG("Growing melon/pumpkin overwriting %s, growing on %s",
+				ItemTypeToString(BlockType[CheckType]).c_str(),
+				ItemTypeToString(Soil).c_str()
+			);
+			// Place a randomly-facing produce:
+			UnboundedRelFastSetBlock(a_RelX + x, a_RelY, a_RelZ + z, ProduceType, (NIBBLETYPE)(a_TickRandom.randInt(4) % 4));
+			break;
+		}
+	}
+}
+
+
+
+
+
+void cChunk::GrowSugarcane(int a_RelX, int a_RelY, int a_RelZ, int a_NumBlocks)
+{
+	// Check the total height of the sugarcane blocks here:
+	int Top = a_RelY + 1;
+	while (
+		(Top < cChunkDef::Height) &&
+		(GetBlock(a_RelX, Top, a_RelZ) == E_BLOCK_SUGARCANE)
+	)
+	{
+		++Top;
+	}
+	int Bottom = a_RelY - 1;
+	while (
+		(Bottom > 0) &&
+		(GetBlock(a_RelX, Bottom, a_RelZ) == E_BLOCK_SUGARCANE)
+	)
+	{
+		--Bottom;
+	}
+	
+	// Grow by at most a_NumBlocks, but no more than max height:
+	int ToGrow = std::min(a_NumBlocks, m_World->GetMaxSugarcaneHeight() + 1 - (Top - Bottom));
+	for (int i = 0; i < ToGrow; i++)
+	{
+		BLOCKTYPE  BlockType;
+		NIBBLETYPE BlockMeta;
+		if (UnboundedRelGetBlock(a_RelX, Top + i, a_RelZ, BlockType, BlockMeta) && (BlockType == E_BLOCK_AIR))
+		{
+			UnboundedRelFastSetBlock(a_RelX, Top + i, a_RelZ, E_BLOCK_SUGARCANE, 0);
+		}
+		else
+		{
+			break;
+		}
+	}  // for i
+}
+
+
+
+
+
+void cChunk::GrowCactus(int a_RelX, int a_RelY, int a_RelZ, int a_NumBlocks)
+{
+	// Check the total height of the sugarcane blocks here:
+	int Top = a_RelY + 1;
+	while (
+		(Top < cChunkDef::Height) &&
+		(GetBlock(a_RelX, Top, a_RelZ) == E_BLOCK_CACTUS)
+	)
+	{
+		++Top;
+	}
+	int Bottom = a_RelY - 1;
+	while (
+		(Bottom > 0) &&
+		(GetBlock(a_RelX, Bottom, a_RelZ) == E_BLOCK_CACTUS)
+	)
+	{
+		--Bottom;
+	}
+	
+	// Grow by at most a_NumBlocks, but no more than max height:
+	int ToGrow = std::min(a_NumBlocks, m_World->GetMaxCactusHeight() + 1 - (Top - Bottom));
+	for (int i = 0; i < ToGrow; i++)
+	{
+		BLOCKTYPE  BlockType;
+		NIBBLETYPE BlockMeta;
+		if (UnboundedRelGetBlock(a_RelX, Top + i, a_RelZ, BlockType, BlockMeta) && (BlockType == E_BLOCK_AIR))
+		{
+			// TODO: Check the surrounding blocks, if they aren't air, break the cactus block into pickups (and continue breaking blocks above in the next loop iterations)
+			UnboundedRelFastSetBlock(a_RelX, Top + i, a_RelZ, E_BLOCK_CACTUS, 0);
+		}
+		else
+		{
+			break;
+		}
+	}  // for i
+}
+
+
+
+
+
+bool cChunk::UnboundedRelGetBlock(int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE & a_BlockType, NIBBLETYPE & a_BlockMeta) const
+{
+	if ((a_RelY < 0) || (a_RelY >= cChunkDef::Height))
+	{
+		LOGWARNING("%s: requesting a block with a_RelY out of range: %d", __FUNCTION__, a_RelY);
+		return false;
+	}
+	cChunk * Chunk = GetRelNeighborChunkAdjustCoords(a_RelX, a_RelZ);
+	if ((Chunk == NULL) || !Chunk->IsValid())
+	{
+		// The chunk is not available, bail out
+		return false;
+	}
+	Chunk->GetBlockTypeMeta(a_RelX, a_RelY, a_RelZ, a_BlockType, a_BlockMeta);
+	return true;
+}
+
+
+
+
+
+bool cChunk::UnboundedRelGetBlockType(int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE & a_BlockType) const
+{
+	if ((a_RelY < 0) || (a_RelY >= cChunkDef::Height))
+	{
+		LOGWARNING("%s: requesting a block with a_RelY out of range: %d", __FUNCTION__, a_RelY);
+		return false;
+	}
+	cChunk * Chunk = GetRelNeighborChunkAdjustCoords(a_RelX, a_RelZ);
+	if ((Chunk == NULL) || !Chunk->IsValid())
+	{
+		// The chunk is not available, bail out
+		return false;
+	}
+	a_BlockType = Chunk->GetBlock(a_RelX, a_RelY, a_RelZ);
+	return true;
+}
+
+
+
+
+
+bool cChunk::UnboundedRelGetBlockMeta(int a_RelX, int a_RelY, int a_RelZ, NIBBLETYPE & a_BlockMeta) const
+{
+	if ((a_RelY < 0) || (a_RelY >= cChunkDef::Height))
+	{
+		LOGWARNING("%s: requesting a block with a_RelY out of range: %d", __FUNCTION__, a_RelY);
+		return false;
+	}
+	cChunk * Chunk = GetRelNeighborChunkAdjustCoords(a_RelX, a_RelZ);
+	if ((Chunk == NULL) || !Chunk->IsValid())
+	{
+		// The chunk is not available, bail out
+		return false;
+	}
+	a_BlockMeta = Chunk->GetMeta(a_RelX, a_RelY, a_RelZ);
+	return true;
+}
+
+
+
+
+
+bool cChunk::UnboundedRelGetBlockBlockLight(int a_RelX, int a_RelY, int a_RelZ, NIBBLETYPE & a_BlockBlockLight) const
+{
+	if ((a_RelY < 0) || (a_RelY >= cChunkDef::Height))
+	{
+		LOGWARNING("%s: requesting a block with a_RelY out of range: %d", __FUNCTION__, a_RelY);
+		return false;
+	}
+	cChunk * Chunk = GetRelNeighborChunkAdjustCoords(a_RelX, a_RelZ);
+	if ((Chunk == NULL) || !Chunk->IsValid())
+	{
+		// The chunk is not available, bail out
+		return false;
+	}
+	a_BlockBlockLight = Chunk->GetBlockLight(a_RelX, a_RelY, a_RelZ);
+	return true;
+}
+
+
+
+
+
+bool cChunk::UnboundedRelGetBlockSkyLight(int a_RelX, int a_RelY, int a_RelZ, NIBBLETYPE & a_BlockSkyLight) const
+{
+	if ((a_RelY < 0) || (a_RelY >= cChunkDef::Height))
+	{
+		LOGWARNING("%s: requesting a block with a_RelY out of range: %d", __FUNCTION__, a_RelY);
+		return false;
+	}
+	cChunk * Chunk = GetRelNeighborChunkAdjustCoords(a_RelX, a_RelZ);
+	if ((Chunk == NULL) || !Chunk->IsValid())
+	{
+		// The chunk is not available, bail out
+		return false;
+	}
+	a_BlockSkyLight = Chunk->GetSkyLight(a_RelX, a_RelY, a_RelZ);
+	return true;
+}
+
+
+
+
+
+bool cChunk::UnboundedRelGetBlockLights(int a_RelX, int a_RelY, int a_RelZ, NIBBLETYPE & a_BlockLight, NIBBLETYPE & a_SkyLight) const
+{
+	if ((a_RelY < 0) || (a_RelY >= cChunkDef::Height))
+	{
+		LOGWARNING("%s: requesting a block with a_RelY out of range: %d", __FUNCTION__, a_RelY);
+		return false;
+	}
+	cChunk * Chunk = GetRelNeighborChunkAdjustCoords(a_RelX, a_RelZ);
+	if ((Chunk == NULL) || !Chunk->IsValid())
+	{
+		// 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);
+	return true;
+}
+
+
+
+
+
+bool cChunk::UnboundedRelSetBlock(int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta)
+{
+	if ((a_RelY < 0) || (a_RelY > cChunkDef::Height))
+	{
+		LOGWARNING("UnboundedRelSetBlock(): requesting a block with a_RelY out of range: %d", a_RelY);
+		return false;
+	}
+	cChunk * Chunk = GetRelNeighborChunkAdjustCoords(a_RelX, a_RelZ);
+	if ((Chunk == NULL) || !Chunk->IsValid())
+	{
+		// The chunk is not available, bail out
+		return false;
+	}
+	Chunk->SetBlock(a_RelX, a_RelY, a_RelZ, a_BlockType, a_BlockMeta);
+	return true;
+}	
+
+
+
+
+
+bool cChunk::UnboundedRelFastSetBlock(int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta)
+{
+	if ((a_RelY < 0) || (a_RelY > cChunkDef::Height))
+	{
+		LOGWARNING("UnboundedRelFastSetBlock(): requesting a block with a_RelY out of range: %d", a_RelY);
+		return false;
+	}
+	cChunk * Chunk = GetRelNeighborChunkAdjustCoords(a_RelX, a_RelZ);
+	if ((Chunk == NULL) || !Chunk->IsValid())
+	{
+		// The chunk is not available, bail out
+		return false;
+	}
+	Chunk->FastSetBlock(a_RelX, a_RelY, a_RelZ, a_BlockType, a_BlockMeta);
+	return true;
+}
+
+
+
+
+
+void cChunk::UnboundedQueueTickBlock(int a_RelX, int a_RelY, int a_RelZ)
+{
+	if ((a_RelY < 0) || (a_RelY >= cChunkDef::Height))
+	{
+		// Outside of chunkmap
+		return;
+	}
+	cChunk * Chunk = GetRelNeighborChunkAdjustCoords(a_RelX, a_RelZ);
+	if ((Chunk != NULL) && Chunk->IsValid())
+	{
+		Chunk->QueueTickBlock(a_RelX, a_RelY, a_RelZ);
+	}
+}
+
+
+
+
+
+int cChunk::GetHeight(int a_X, int a_Z)
+{
+	ASSERT((a_X >= 0) && (a_X < Width) && (a_Z >= 0) && (a_Z < Width));
+	
+	if ((a_X >= 0) && (a_X < Width) && (a_Z >= 0) && (a_Z < Width))
+	{
+		return m_HeightMap[a_X + a_Z * Width];
+	}
+	return 0;
+}
+
+
+
+
+
+void cChunk::CreateBlockEntities(void)
+{
+	for (int x = 0; x < Width; x++)
+	{
+		for (int z = 0; z < Width; z++)
+		{
+			for (int y = 0; y < Height; y++)
+			{
+				BLOCKTYPE BlockType = cChunkDef::GetBlock(m_BlockTypes, x, y, z);
+				switch (BlockType)
+				{
+					case E_BLOCK_CHEST:
+					case E_BLOCK_DISPENSER:
+					case E_BLOCK_DROPPER:
+					case E_BLOCK_LIT_FURNACE:
+					case E_BLOCK_FURNACE:
+					case E_BLOCK_HOPPER:
+					case E_BLOCK_SIGN_POST:
+					case E_BLOCK_WALLSIGN:
+					case E_BLOCK_NOTE_BLOCK:
+					case E_BLOCK_JUKEBOX:
+					{
+						if (!HasBlockEntityAt(x + m_PosX * Width, y + m_PosY * Height, z + m_PosZ * Width))
+						{
+							m_BlockEntities.push_back(cBlockEntity::CreateByBlockType(
+								BlockType, GetMeta(x, y, z),
+								x + m_PosX * Width, y + m_PosY * Height, z + m_PosZ * Width, m_World
+							));
+						}
+						break;
+					}
+				}  // switch (BlockType)
+			}  // for y
+		}  // for z
+	}  // for x
+}
+
+
+
+
+
+void cChunk::WakeUpSimulators(void)
+{
+	cSimulator * WaterSimulator = m_World->GetWaterSimulator();
+	cSimulator * LavaSimulator  = m_World->GetLavaSimulator();
+	int BaseX = m_PosX * cChunkDef::Width;
+	int BaseZ = m_PosZ * cChunkDef::Width;
+	for (int x = 0; x < Width; x++)
+	{
+		int BlockX = x + BaseX;
+		for (int z = 0; z < Width; z++)
+		{
+			int BlockZ = z + BaseZ;
+			for (int y = GetHeight(x, z); y >= 0; y--)
+			{
+				switch (cChunkDef::GetBlock(m_BlockTypes, x, y, z))
+				{
+					case E_BLOCK_WATER:
+					{
+						WaterSimulator->AddBlock(BlockX, y, BlockZ, this);
+						break;
+					}
+					case E_BLOCK_LAVA:
+					{
+						LavaSimulator->AddBlock(BlockX, y, BlockZ, this);
+						break;
+					}
+				}  // switch (BlockType)
+			}  // for y
+		}  // for z
+	}  // for x
+}
+
+
+
+
+
+void cChunk::CalculateHeightmap()
+{
+	for (int x = 0; x < Width; x++)
+	{
+		for (int z = 0; z < Width; z++)
+		{
+			for (int y = Height - 1; y > -1; y--)
+			{
+				int index = MakeIndex( x, y, z );
+				if (m_BlockTypes[index] != E_BLOCK_AIR)
+				{
+					m_HeightMap[x + z * Width] = (unsigned char)y;
+					break;
+				}
+			}  // for y
+		}  // for z
+	}  // for x
+}
+
+
+
+
+
+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);
+	QueueTickBlockNeighbors(a_RelX, a_RelY, a_RelZ);
+
+	// If there was a block entity, remove it:
+	Vector3i WorldPos = PositionToWorldPosition(a_RelX, a_RelY, a_RelZ);
+	cBlockEntity * BlockEntity = GetBlockEntity(WorldPos);
+	if (BlockEntity != NULL)
+	{
+		BlockEntity->Destroy();
+		RemoveBlockEntity(BlockEntity);
+		delete BlockEntity;
+	}
+	
+	// If the new block is a block entity, create the entity object:
+	switch (a_BlockType)
+	{
+		case E_BLOCK_CHEST:
+		case E_BLOCK_DISPENSER:
+		case E_BLOCK_DROPPER:
+		case E_BLOCK_LIT_FURNACE:
+		case E_BLOCK_FURNACE:
+		case E_BLOCK_HOPPER:
+		case E_BLOCK_SIGN_POST:
+		case E_BLOCK_WALLSIGN:
+		case E_BLOCK_NOTE_BLOCK:
+		case E_BLOCK_JUKEBOX:
+		{
+			AddBlockEntity(cBlockEntity::CreateByBlockType(a_BlockType, a_BlockMeta, WorldPos.x, WorldPos.y, WorldPos.z, m_World));
+			break;
+		}
+	}  // switch (a_BlockType)
+}
+
+
+
+
+
+void cChunk::QueueSetBlock(int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta, Int64 a_Tick)
+{
+	m_SetBlockQueue.push_back(sSetBlockQueueItem(a_RelX, a_RelY, a_RelZ, a_BlockType, a_BlockMeta, a_Tick));
+}
+
+
+
+
+
+void cChunk::QueueTickBlock(int a_RelX, int a_RelY, int a_RelZ)
+{
+	ASSERT (
+		(a_RelX >= 0) && (a_RelX < Width) &&
+		(a_RelY >= 0) && (a_RelY < Height) &&
+		(a_RelZ >= 0) && (a_RelZ < Width)
+	);  // Coords need to be valid
+
+	if (!IsValid())
+	{
+		return;
+	}
+	
+	m_ToTickBlocks.push_back(MakeIndexNoCheck(a_RelX, a_RelY, a_RelZ));
+}
+
+
+
+
+
+void cChunk::QueueTickBlockNeighbors(int a_RelX, int a_RelY, int a_RelZ)
+{
+	struct
+	{
+		int x, y, z;
+	}
+	Coords[] =
+	{
+		{ 1,  0,  0},
+		{-1,  0,  0},
+		{ 0,  1,  0},
+		{ 0, -1,  0},
+		{ 0,  0,  1},
+		{ 0,  0, -1},
+	} ;
+	for (int i = 0; i < ARRAYCOUNT(Coords); i++)
+	{
+		UnboundedQueueTickBlock(a_RelX + Coords[i].x, a_RelY + Coords[i].y, a_RelZ + Coords[i].z);
+	}  // for i - Coords[]
+}
+
+
+
+
+
+void cChunk::FastSetBlock(int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE a_BlockType, BLOCKTYPE a_BlockMeta)
+{
+	ASSERT(!((a_RelX < 0) || (a_RelX >= Width) || (a_RelY < 0) || (a_RelY >= Height) || (a_RelZ < 0) || (a_RelZ >= Width)));
+
+	ASSERT(IsValid());
+	
+	const int index = MakeIndexNoCheck(a_RelX, a_RelY, a_RelZ);
+	const BLOCKTYPE OldBlockType = cChunkDef::GetBlock(m_BlockTypes, index);
+	const BLOCKTYPE OldBlockMeta = GetNibble(m_BlockMeta, index);
+	if ((OldBlockType == a_BlockType) && (OldBlockMeta == a_BlockMeta))
+	{
+		return;
+	}
+
+	MarkDirty();
+	
+	m_BlockTypes[index] = a_BlockType;
+
+	// The client doesn't need to distinguish between stationary and nonstationary fluids:
+	if (
+		(OldBlockMeta != a_BlockMeta) ||  // Different meta always gets sent to the client
+		!(
+			((OldBlockType == E_BLOCK_STATIONARY_WATER) && (a_BlockType == E_BLOCK_WATER)) ||             // Replacing stationary water with water
+			((OldBlockType == E_BLOCK_WATER)            && (a_BlockType == E_BLOCK_STATIONARY_WATER)) ||  // Replacing water with stationary water
+			((OldBlockType == E_BLOCK_STATIONARY_LAVA)  && (a_BlockType == E_BLOCK_LAVA)) ||              // Replacing stationary water with water
+			((OldBlockType == E_BLOCK_LAVA)             && (a_BlockType == E_BLOCK_STATIONARY_LAVA))      // Replacing water with stationary water
+		)
+	)
+	{
+		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);
+
+	// ONLY recalculate lighting if it's necessary!
+	if(
+		(g_BlockLightValue[OldBlockType ]        != g_BlockLightValue[a_BlockType]) ||
+		(g_BlockSpreadLightFalloff[OldBlockType] != g_BlockSpreadLightFalloff[a_BlockType]) ||
+		(g_BlockTransparent[OldBlockType]        != g_BlockTransparent[a_BlockType])
+	)
+	{
+		m_IsLightValid = false;
+	}
+
+	// Update heightmap, if needed:
+	if (a_RelY >= m_HeightMap[a_RelX + a_RelZ * Width])
+	{
+		if (a_BlockType != E_BLOCK_AIR)
+		{
+			m_HeightMap[a_RelX + a_RelZ * Width] = (unsigned char)a_RelY;
+		}
+		else
+		{
+			for (int y = a_RelY - 1; y > 0; --y)
+			{
+				if (m_BlockTypes[MakeIndexNoCheck(a_RelX, y, a_RelZ)] != E_BLOCK_AIR)
+				{
+					m_HeightMap[a_RelX + a_RelZ * Width] = (unsigned char)y;
+					break;
+				}
+			}  // for y - column in m_BlockData
+		}
+	}
+}
+
+
+
+
+
+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)));
+		return;
+	}
+
+	Vector3i wp = PositionToWorldPosition(a_RelX, a_RelY, a_RelZ);
+	a_Client->SendBlockChange(wp.x, wp.y, wp.z, GetBlock(index), GetMeta(index));
+	
+	// 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)
+	{
+		if (((*itr)->GetPosX() == wp.x) && ((*itr)->GetPosY() == wp.y) && ((*itr)->GetPosZ() == wp.z))
+		{
+			(*itr)->SendTo(*a_Client);
+		}
+	}  // for itr - m_BlockEntities
+}
+
+
+
+
+
+void cChunk::AddBlockEntity(cBlockEntity * a_BlockEntity)
+{
+	MarkDirty();
+	m_BlockEntities.push_back(a_BlockEntity);
+}
+
+
+
+
+
+cBlockEntity * cChunk::GetBlockEntity(int a_BlockX, int a_BlockY, int a_BlockZ)
+{
+	for (cBlockEntityList::iterator itr = m_BlockEntities.begin(); itr != m_BlockEntities.end(); ++itr)
+	{
+		if (
+			((*itr)->GetPosX() == a_BlockX) &&
+			((*itr)->GetPosY() == a_BlockY) &&
+			((*itr)->GetPosZ() == a_BlockZ)
+		)
+		{
+			return *itr;
+		}
+	}  // for itr - m_BlockEntities[]
+	
+	return NULL;
+}
+
+
+
+
+
+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)
+	{
+		be->UsedBy(a_Player);
+	}
+}
+
+
+
+
+
+void cChunk::CollectPickupsByPlayer(cPlayer * a_Player)
+{
+	double PosX = a_Player->GetPosX();
+	double PosY = a_Player->GetPosY();
+	double PosZ = a_Player->GetPosZ();
+	
+	for (cEntityList::iterator itr = m_Entities.begin(); itr != m_Entities.end(); ++itr)
+	{
+		if ((!(*itr)->IsPickup()) && (!(*itr)->IsProjectile()))
+		{
+			continue; // Only pickups and projectiles
+		}
+		float DiffX = (float)((*itr)->GetPosX() - PosX );
+		float DiffY = (float)((*itr)->GetPosY() - PosY );
+		float DiffZ = (float)((*itr)->GetPosZ() - PosZ );
+		float SqrDist = DiffX * DiffX + DiffY * DiffY + DiffZ * DiffZ;
+		if (SqrDist < 1.5f * 1.5f)  // 1.5 block
+		{
+			/*
+			LOG("Pickup %d being collected by player \"%s\", distance %f",
+				(*itr)->GetUniqueID(), a_Player->GetName().c_str(), SqrDist
+			);
+			*/
+			MarkDirty();
+			if ((*itr)->IsPickup())
+			{
+				(reinterpret_cast<cPickup *>(*itr))->CollectedBy(a_Player);
+			}
+			else
+			{
+				(reinterpret_cast<cProjectileEntity *>(*itr))->CollectedBy(a_Player);
+			}
+		}
+		else if (SqrDist < 5 * 5)
+		{
+			/*
+			LOG("Pickup %d close to player \"%s\", but still too far to collect: %f",
+				(*itr)->GetUniqueID(), a_Player->GetName().c_str(), SqrDist
+			);
+			*/
+		}
+	}
+}
+
+
+
+
+
+bool cChunk::SetSignLines(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
+	for (cBlockEntityList::iterator itr = m_BlockEntities.begin(); itr != m_BlockEntities.end(); ++itr)
+	{
+		if (
+			((*itr)->GetPosX() == a_PosX) &&
+			((*itr)->GetPosY() == a_PosY) &&
+			((*itr)->GetPosZ() == a_PosZ) &&
+			(
+				((*itr)->GetBlockType() == E_BLOCK_WALLSIGN) ||
+				((*itr)->GetBlockType() == E_BLOCK_SIGN_POST)
+			)
+		)
+		{
+			MarkDirty();
+			(reinterpret_cast<cSignEntity *>(*itr))->SetLines(a_Line1, a_Line2, a_Line3, a_Line4);
+			m_World->BroadcastBlockEntity(a_PosX, a_PosY, a_PosZ);
+			return true;
+		}
+	}  // for itr - m_BlockEntities[]
+	return false;
+}
+
+
+
+
+
+void cChunk::RemoveBlockEntity( cBlockEntity* a_BlockEntity )
+{
+	MarkDirty();
+	m_BlockEntities.remove(a_BlockEntity);
+}
+
+
+
+
+
+bool cChunk::AddClient(cClientHandle* a_Client)
+{
+	for (cClientHandleList::iterator itr = m_LoadedByClient.begin(); itr != m_LoadedByClient.end(); ++itr)
+	{
+		if (a_Client == *itr)
+		{
+			// Already there, nothing needed
+			return false;
+		}
+	}
+	m_LoadedByClient.push_back( a_Client );
+
+	for (cEntityList::iterator itr = m_Entities.begin(); itr != m_Entities.end(); ++itr )
+	{
+		LOGD("cChunk: Entity #%d (%s) at [%i, %i, %i] spawning for player \"%s\"", (*itr)->GetUniqueID(), (*itr)->GetClass(), m_PosX, m_PosY, m_PosZ, a_Client->GetUsername().c_str());
+		(*itr)->SpawnOn(*a_Client);
+	}
+	return true;
+}
+
+
+
+
+
+void cChunk::RemoveClient( cClientHandle* a_Client )
+{
+	for (cClientHandleList::iterator itr = m_LoadedByClient.begin(); itr != m_LoadedByClient.end(); ++itr)
+	{
+		if (*itr != a_Client)
+		{
+			continue;
+		}
+		
+		m_LoadedByClient.erase(itr);
+
+		if (!a_Client->IsDestroyed())
+		{
+			for (cEntityList::iterator itr = m_Entities.begin(); itr != m_Entities.end(); ++itr )
+			{
+				LOGD("chunk [%i, %i] destroying entity #%i for player \"%s\"", m_PosX, m_PosZ, (*itr)->GetUniqueID(), a_Client->GetUsername().c_str() );
+				a_Client->SendDestroyEntity(*(*itr));
+			}
+		}
+		return;
+	}  // for itr - m_LoadedByClient[]
+}
+
+
+
+
+
+bool cChunk::HasClient( cClientHandle* a_Client )
+{
+	for (cClientHandleList::const_iterator itr = m_LoadedByClient.begin(); itr != m_LoadedByClient.end(); ++itr)
+	{
+		if ((*itr) == a_Client)
+		{
+			return true;
+		}
+	}
+	return false;
+}
+
+
+
+
+
+bool cChunk::HasAnyClients(void)
+{
+	return !m_LoadedByClient.empty();
+}
+
+
+
+
+
+void cChunk::AddEntity(cEntity * a_Entity)
+{
+	if (!a_Entity->IsPlayer())
+	{
+		MarkDirty();
+	}
+	
+	ASSERT(std::find(m_Entities.begin(), m_Entities.end(), a_Entity) == m_Entities.end());  // Not there already
+	
+	m_Entities.push_back(a_Entity);
+}
+
+
+
+
+
+void cChunk::RemoveEntity(cEntity * a_Entity)
+{
+	size_t SizeBefore = m_Entities.size();
+	m_Entities.remove(a_Entity);
+	size_t SizeAfter = m_Entities.size();
+	
+	if (SizeBefore != SizeAfter)
+	{
+		// Mark as dirty if it was a server-generated entity:
+		if (!a_Entity->IsPlayer())
+		{
+			MarkDirty();
+		}
+	}
+}
+
+
+
+
+
+bool cChunk::HasEntity(int a_EntityID)
+{
+	for (cEntityList::const_iterator itr = m_Entities.begin(), end = m_Entities.end(); itr != end; ++itr)
+	{
+		if ((*itr)->GetUniqueID() == a_EntityID)
+		{
+			return true;
+		}
+	}  // for itr - m_Entities[]
+	return false;
+}
+
+
+
+
+
+bool cChunk::ForEachEntity(cEntityCallback & a_Callback)
+{
+	// The entity list is locked by the parent chunkmap's CS
+	for (cEntityList::iterator itr = m_Entities.begin(), itr2 = itr; itr != m_Entities.end(); itr = itr2)
+	{
+		++itr2;
+		if (a_Callback.Item(*itr))
+		{
+			return false;
+		}
+	}  // for itr - m_Entitites[]
+	return true;
+}
+
+
+
+
+
+bool cChunk::DoWithEntityByID(int a_EntityID, cEntityCallback & a_Callback, bool & a_CallbackResult)
+{
+	// The entity list is locked by the parent chunkmap's CS
+	for (cEntityList::iterator itr = m_Entities.begin(), end = m_Entities.end(); itr != end; ++itr)
+	{
+		if ((*itr)->GetUniqueID() == a_EntityID)
+		{
+			a_CallbackResult = a_Callback.Item(*itr);
+			return true;
+		}
+	}  // for itr - m_Entitites[]
+	return false;
+}
+
+
+
+
+
+bool cChunk::ForEachChest(cChestCallback & a_Callback)
+{
+	// The blockentity list is locked by the parent chunkmap's CS
+	for (cBlockEntityList::iterator itr = m_BlockEntities.begin(), itr2 = itr; itr != m_BlockEntities.end(); itr = itr2)
+	{
+		++itr2;
+		if ((*itr)->GetBlockType() != E_BLOCK_CHEST)
+		{
+			continue;
+		}
+		if (a_Callback.Item((cChestEntity *)*itr))
+		{
+			return false;
+		}
+	}  // for itr - m_BlockEntitites[]
+	return true;
+}
+
+
+
+
+
+bool cChunk::ForEachDispenser(cDispenserCallback & a_Callback)
+{
+	// The blockentity list is locked by the parent chunkmap's CS
+	for (cBlockEntityList::iterator itr = m_BlockEntities.begin(), itr2 = itr; itr != m_BlockEntities.end(); itr = itr2)
+	{
+		++itr2;
+		if ((*itr)->GetBlockType() != E_BLOCK_DISPENSER)
+		{
+			continue;
+		}
+		if (a_Callback.Item((cDispenserEntity *)*itr))
+		{
+			return false;
+		}
+	}  // for itr - m_BlockEntitites[]
+	return true;
+}
+
+
+
+
+
+bool cChunk::ForEachDropper(cDropperCallback & a_Callback)
+{
+	// The blockentity list is locked by the parent chunkmap's CS
+	for (cBlockEntityList::iterator itr = m_BlockEntities.begin(), itr2 = itr; itr != m_BlockEntities.end(); itr = itr2)
+	{
+		++itr2;
+		if ((*itr)->GetBlockType() != E_BLOCK_DROPPER)
+		{
+			continue;
+		}
+		if (a_Callback.Item((cDropperEntity *)*itr))
+		{
+			return false;
+		}
+	}  // for itr - m_BlockEntitites[]
+	return true;
+}
+
+
+
+
+
+bool cChunk::ForEachDropSpenser(cDropSpenserCallback & a_Callback)
+{
+	// The blockentity list is locked by the parent chunkmap's CS
+	for (cBlockEntityList::iterator itr = m_BlockEntities.begin(), itr2 = itr; itr != m_BlockEntities.end(); itr = itr2)
+	{
+		++itr2;
+		if (((*itr)->GetBlockType() != E_BLOCK_DISPENSER) && ((*itr)->GetBlockType() != E_BLOCK_DROPPER))
+		{
+			continue;
+		}
+		if (a_Callback.Item((cDropSpenserEntity *)*itr))
+		{
+			return false;
+		}
+	}  // for itr - m_BlockEntitites[]
+	return true;
+}
+
+
+
+
+
+bool cChunk::ForEachFurnace(cFurnaceCallback & a_Callback)
+{
+	// The blockentity list is locked by the parent chunkmap's CS
+	for (cBlockEntityList::iterator itr = m_BlockEntities.begin(), itr2 = itr; itr != m_BlockEntities.end(); itr = itr2)
+	{
+		++itr2;
+		switch ((*itr)->GetBlockType())
+		{
+			case E_BLOCK_FURNACE:
+			case E_BLOCK_LIT_FURNACE:
+			{
+				break;
+			}
+			default:
+			{
+				continue;
+			}
+		}
+		if (a_Callback.Item((cFurnaceEntity *)*itr))
+		{
+			return false;
+		}
+	}  // for itr - m_BlockEntitites[]
+	return true;
+}
+
+
+
+
+
+bool cChunk::DoWithChestAt(int a_BlockX, int a_BlockY, int a_BlockZ, cChestCallback & a_Callback)
+{
+	// The blockentity list is locked by the parent chunkmap's CS
+	for (cBlockEntityList::iterator itr = m_BlockEntities.begin(), itr2 = itr; itr != m_BlockEntities.end(); itr = itr2)
+	{
+		++itr2;
+		if (((*itr)->GetPosX() != a_BlockX) || ((*itr)->GetPosY() != a_BlockY) || ((*itr)->GetPosZ() != a_BlockZ))
+		{
+			continue;
+		}
+		if ((*itr)->GetBlockType() != E_BLOCK_CHEST)
+		{
+			// There is a block entity here, but of different type. No other block entity can be here, so we can safely bail out
+			return false;
+		}
+		
+		// The correct block entity is here
+		if (a_Callback.Item((cChestEntity *)*itr))
+		{
+			return false;
+		}
+		return true;
+	}  // for itr - m_BlockEntitites[]
+	
+	// Not found:
+	return false;
+}
+
+
+
+
+
+bool cChunk::DoWithDispenserAt(int a_BlockX, int a_BlockY, int a_BlockZ, cDispenserCallback & a_Callback)
+{
+	// The blockentity list is locked by the parent chunkmap's CS
+	for (cBlockEntityList::iterator itr = m_BlockEntities.begin(), itr2 = itr; itr != m_BlockEntities.end(); itr = itr2)
+	{
+		++itr2;
+		if (((*itr)->GetPosX() != a_BlockX) || ((*itr)->GetPosY() != a_BlockY) || ((*itr)->GetPosZ() != a_BlockZ))
+		{
+			continue;
+		}
+		if ((*itr)->GetBlockType() != E_BLOCK_DISPENSER)
+		{
+			// There is a block entity here, but of different type. No other block entity can be here, so we can safely bail out
+			return false;
+		}
+		
+		// The correct block entity is here
+		if (a_Callback.Item((cDispenserEntity *)*itr))
+		{
+			return false;
+		}
+		return true;
+	}  // for itr - m_BlockEntitites[]
+	
+	// Not found:
+	return false;
+}
+
+
+
+
+
+bool cChunk::DoWithDropperAt(int a_BlockX, int a_BlockY, int a_BlockZ, cDropperCallback & a_Callback)
+{
+	// The blockentity list is locked by the parent chunkmap's CS
+	for (cBlockEntityList::iterator itr = m_BlockEntities.begin(), itr2 = itr; itr != m_BlockEntities.end(); itr = itr2)
+	{
+		++itr2;
+		if (((*itr)->GetPosX() != a_BlockX) || ((*itr)->GetPosY() != a_BlockY) || ((*itr)->GetPosZ() != a_BlockZ))
+		{
+			continue;
+		}
+		if ((*itr)->GetBlockType() != E_BLOCK_DROPPER)
+		{
+			// There is a block entity here, but of different type. No other block entity can be here, so we can safely bail out
+			return false;
+		}
+		
+		// The correct block entity is here
+		if (a_Callback.Item((cDropperEntity *)*itr))
+		{
+			return false;
+		}
+		return true;
+	}  // for itr - m_BlockEntitites[]
+	
+	// Not found:
+	return false;
+}
+
+
+
+
+
+bool cChunk::DoWithDropSpenserAt(int a_BlockX, int a_BlockY, int a_BlockZ, cDropSpenserCallback & a_Callback)
+{
+	// The blockentity list is locked by the parent chunkmap's CS
+	for (cBlockEntityList::iterator itr = m_BlockEntities.begin(), itr2 = itr; itr != m_BlockEntities.end(); itr = itr2)
+	{
+		++itr2;
+		if (((*itr)->GetPosX() != a_BlockX) || ((*itr)->GetPosY() != a_BlockY) || ((*itr)->GetPosZ() != a_BlockZ))
+		{
+			continue;
+		}
+		if (((*itr)->GetBlockType() != E_BLOCK_DISPENSER) && ((*itr)->GetBlockType() != E_BLOCK_DROPPER))
+		{
+			// There is a block entity here, but of different type. No other block entity can be here, so we can safely bail out
+			return false;
+		}
+		
+		// The correct block entity is here
+		if (a_Callback.Item((cDropSpenserEntity *)*itr))
+		{
+			return false;
+		}
+		return true;
+	}  // for itr - m_BlockEntitites[]
+	
+	// Not found:
+	return false;
+}
+
+
+
+
+
+bool cChunk::DoWithFurnaceAt(int a_BlockX, int a_BlockY, int a_BlockZ, cFurnaceCallback & a_Callback)
+{
+	// The blockentity list is locked by the parent chunkmap's CS
+	for (cBlockEntityList::iterator itr = m_BlockEntities.begin(), itr2 = itr; itr != m_BlockEntities.end(); itr = itr2)
+	{
+		++itr2;
+		if (((*itr)->GetPosX() != a_BlockX) || ((*itr)->GetPosY() != a_BlockY) || ((*itr)->GetPosZ() != a_BlockZ))
+		{
+			continue;
+		}
+		switch ((*itr)->GetBlockType())
+		{
+			case E_BLOCK_FURNACE:
+			case E_BLOCK_LIT_FURNACE:
+			{
+				break;
+			}
+			default:
+			{
+				// There is a block entity here, but of different type. No other block entity can be here, so we can safely bail out
+				return false;
+			}
+		}  // switch (BlockType)
+		
+		// The correct block entity is here, 
+		if (a_Callback.Item((cFurnaceEntity *)*itr))
+		{
+			return false;
+		}
+		return true;
+	}  // for itr - m_BlockEntitites[]
+	
+	// Not found:
+	return false;
+}
+
+
+
+
+
+bool cChunk::GetSignLines(int a_BlockX, int a_BlockY, int a_BlockZ, AString & a_Line1, AString & a_Line2, AString & a_Line3, AString & a_Line4)
+{
+	// The blockentity list is locked by the parent chunkmap's CS
+	for (cBlockEntityList::iterator itr = m_BlockEntities.begin(); itr != m_BlockEntities.end(); ++itr)
+	{
+		if (((*itr)->GetPosX() != a_BlockX) || ((*itr)->GetPosY() != a_BlockY) || ((*itr)->GetPosZ() != a_BlockZ))
+		{
+			continue;
+		}
+		switch ((*itr)->GetBlockType())
+		{
+			case E_BLOCK_WALLSIGN:
+			case E_BLOCK_SIGN_POST:
+			{
+				a_Line1 = ((cSignEntity *)*itr)->GetLine(0);
+				a_Line2 = ((cSignEntity *)*itr)->GetLine(1);
+				a_Line3 = ((cSignEntity *)*itr)->GetLine(2);
+				a_Line4 = ((cSignEntity *)*itr)->GetLine(3);
+				return true;
+			}
+		}  // switch (BlockType)
+		
+		// There is a block entity here, but of different type. No other block entity can be here, so we can safely bail out
+		return false;
+	}  // for itr - m_BlockEntitites[]
+	
+	// Not found:
+	return false;
+}
+
+
+
+
+
+BLOCKTYPE cChunk::GetBlock(int a_RelX, int a_RelY, int a_RelZ) const
+{
+	if (
+		(a_RelX < 0) || (a_RelX >= Width) || 
+		(a_RelY < 0) || (a_RelY >= Height) ||
+		(a_RelZ < 0) || (a_RelZ >= Width)
+	)
+	{
+		ASSERT(!"GetBlock(x, y, z) out of bounds!");
+		return 0; // Clip
+	}
+
+	return m_BlockTypes[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;
+	}
+	
+	return m_BlockTypes[ a_BlockIdx ];
+}
+
+
+
+
+
+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 = cChunkDef::GetBlock (m_BlockTypes, a_RelX, a_RelY, a_RelZ);
+	a_BlockMeta = cChunkDef::GetNibble(m_BlockMeta, a_RelX, a_RelY, a_RelZ);
+}
+
+
+
+
+
+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  = cChunkDef::GetBlock (m_BlockTypes,    Idx);
+	a_Meta       = cChunkDef::GetNibble(m_BlockMeta,     Idx);
+	a_SkyLight   = cChunkDef::GetNibble(m_BlockSkyLight, Idx);
+	a_BlockLight = cChunkDef::GetNibble(m_BlockLight,    Idx);
+}
+
+
+
+
+
+cChunk * cChunk::GetNeighborChunk(int a_BlockX, int a_BlockZ)
+{
+	// Convert coords to relative, then call the relative version:
+	a_BlockX -= m_PosX * cChunkDef::Width;
+	a_BlockZ -= m_PosZ * cChunkDef::Width;
+	return GetRelNeighborChunk(a_BlockX, a_BlockZ);
+}
+
+
+
+
+
+cChunk * cChunk::GetRelNeighborChunk(int a_RelX, int a_RelZ)
+{
+	bool ReturnThis = true;
+	if (a_RelX < 0)
+	{
+		if (m_NeighborXM != NULL)
+		{
+			cChunk * Candidate = m_NeighborXM->GetRelNeighborChunk(a_RelX + cChunkDef::Width, a_RelZ);
+			if (Candidate != NULL)
+			{
+				return Candidate;
+			}
+		}
+		// Going X first failed, but if the request is crossing Z as well, let's try the Z first later on.
+		ReturnThis = false;
+	}
+	else if (a_RelX >= cChunkDef::Width)
+	{
+		if (m_NeighborXP != NULL)
+		{
+			cChunk * Candidate = m_NeighborXP->GetRelNeighborChunk(a_RelX - cChunkDef::Width, a_RelZ);
+			if (Candidate != NULL)
+			{
+				return Candidate;
+			}
+		}
+		// Going X first failed, but if the request is crossing Z as well, let's try the Z first later on.
+		ReturnThis = false;
+	}
+	
+	if (a_RelZ < 0)
+	{
+		if (m_NeighborZM != NULL)
+		{
+			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;
+	}
+	else if (a_RelZ >= cChunkDef::Width)
+	{
+		if (m_NeighborZP != NULL)
+		{
+			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 (ReturnThis ? this : NULL);
+}
+
+
+
+
+
+cChunk * cChunk::GetRelNeighborChunkAdjustCoords(int & a_RelX, int & a_RelZ) const
+{
+	cChunk * ToReturn = const_cast<cChunk *>(this);
+
+	// The most common case: inside this chunk:
+	if (
+		(a_RelX >= 0) && (a_RelX < Width) &&
+		(a_RelZ >= 0) && (a_RelZ < Width)
+	)
+	{
+		return ToReturn;
+	}
+	
+	// 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))
+	{
+		RelX -= Width;
+		ToReturn = ToReturn->m_NeighborXP;
+	}
+	while ((RelX < 0) && (ToReturn != NULL))
+	{
+		RelX += Width;
+		ToReturn = ToReturn->m_NeighborXM;
+	}
+	while ((RelZ >= Width) && (ToReturn != NULL))
+	{
+		RelZ -= Width;
+		ToReturn = ToReturn->m_NeighborZP;
+	}
+	while ((RelZ < 0) && (ToReturn != NULL))
+	{
+		RelZ += Width;
+		ToReturn = ToReturn->m_NeighborZM;
+	}
+	if (ToReturn != NULL)
+	{
+		a_RelX = RelX;
+		a_RelZ = RelZ;
+		return ToReturn;
+	}
+	
+	// The chunk cannot be walked through neighbors, find it through the chunkmap:
+	int AbsX = a_RelX + m_PosX * Width;
+	int AbsZ = a_RelZ + m_PosZ * Width;
+	int DstChunkX, DstChunkZ;
+	BlockToChunk(AbsX, AbsZ, DstChunkX, DstChunkZ);
+	ToReturn = m_ChunkMap->FindChunk(DstChunkX, DstChunkZ);
+	a_RelX = AbsX - DstChunkX * Width;
+	a_RelZ = AbsZ - DstChunkZ * Width;
+	return ToReturn;
+}
+
+
+
+
+
+void cChunk::BroadcastAttachEntity(const cEntity & a_Entity, const cEntity * a_Vehicle)
+{
+	for (cClientHandleList::const_iterator itr = m_LoadedByClient.begin(); itr != m_LoadedByClient.end(); ++itr )
+	{
+		(*itr)->SendAttachEntity(a_Entity, a_Vehicle);
+	}  // for itr - LoadedByClient[]
+}
+
+
+
+
+
+void cChunk::BroadcastBlockAction(int a_BlockX, int a_BlockY, int a_BlockZ, char a_Byte1, char a_Byte2, BLOCKTYPE a_BlockType, const cClientHandle * a_Exclude)
+{
+	for (cClientHandleList::const_iterator itr = m_LoadedByClient.begin(); itr != m_LoadedByClient.end(); ++itr )
+	{
+		if (*itr == a_Exclude)
+		{
+			continue;
+		}
+		(*itr)->SendBlockAction(a_BlockX, a_BlockY, a_BlockZ, a_Byte1, a_Byte2, a_BlockType);
+	}  // for itr - LoadedByClient[]
+}
+
+
+
+
+
+void cChunk::BroadcastBlockBreakAnimation(int a_entityID, int a_blockX, int a_blockY, int a_blockZ, char a_stage, const cClientHandle * a_Exclude)
+{
+	for (cClientHandleList::iterator itr = m_LoadedByClient.begin(); itr != m_LoadedByClient.end(); ++itr )
+	{
+		if (*itr == a_Exclude)
+		{
+			continue;
+		}
+		(*itr)->SendBlockBreakAnim(a_entityID, a_blockX, a_blockY, a_blockZ, a_stage);
+	}  // for itr - LoadedByClient[]
+}
+
+
+
+
+
+void cChunk::BroadcastBlockEntity(int a_BlockX, int a_BlockY, int a_BlockZ, const cClientHandle * a_Exclude)
+{
+	// 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)
+	{
+		return;
+	}
+	for (cClientHandleList::iterator itr = m_LoadedByClient.begin(); itr != m_LoadedByClient.end(); ++itr )
+	{
+		if (*itr == a_Exclude)
+		{
+			continue;
+		}
+		Entity->SendTo(*(*itr));
+	}  // for itr - LoadedByClient[]
+}
+
+
+
+
+
+void cChunk::BroadcastChunkData(cChunkDataSerializer & a_Serializer, const cClientHandle * a_Exclude)
+{
+	for (cClientHandleList::iterator itr = m_LoadedByClient.begin(); itr != m_LoadedByClient.end(); ++itr )
+	{
+		if (*itr == a_Exclude)
+		{
+			continue;
+		}
+		(*itr)->SendChunkData(m_PosX, m_PosZ, a_Serializer);
+	}  // for itr - LoadedByClient[]
+}
+
+
+
+
+
+void cChunk::BroadcastCollectPickup(const cPickup & a_Pickup, const cPlayer & a_Player, const cClientHandle * a_Exclude)
+{
+	for (cClientHandleList::iterator itr = m_LoadedByClient.begin(); itr != m_LoadedByClient.end(); ++itr )
+	{
+		if (*itr == a_Exclude)
+		{
+			continue;
+		}
+		(*itr)->SendCollectPickup(a_Pickup, a_Player);
+	}  // for itr - LoadedByClient[]
+}
+
+
+
+
+
+void cChunk::BroadcastDestroyEntity(const cEntity & a_Entity, const cClientHandle * a_Exclude)
+{
+	for (cClientHandleList::const_iterator itr = m_LoadedByClient.begin(); itr != m_LoadedByClient.end(); ++itr )
+	{
+		if (*itr == a_Exclude)
+		{
+			continue;
+		}
+		(*itr)->SendDestroyEntity(a_Entity);
+	}  // for itr - LoadedByClient[]
+}
+
+
+
+
+
+void cChunk::BroadcastEntityEquipment(const cEntity & a_Entity, short a_SlotNum, const cItem & a_Item, const cClientHandle * a_Exclude)
+{
+	for (cClientHandleList::const_iterator itr = m_LoadedByClient.begin(); itr != m_LoadedByClient.end(); ++itr )
+	{
+		if (*itr == a_Exclude)
+		{
+			continue;
+		}
+		(*itr)->SendEntityEquipment(a_Entity, a_SlotNum, a_Item);
+	}  // for itr - LoadedByClient[]
+}
+
+
+
+
+
+void cChunk::BroadcastEntityHeadLook(const cEntity & a_Entity, const cClientHandle * a_Exclude)
+{
+	for (cClientHandleList::const_iterator itr = m_LoadedByClient.begin(); itr != m_LoadedByClient.end(); ++itr )
+	{
+		if (*itr == a_Exclude)
+		{
+			continue;
+		}
+		(*itr)->SendEntityHeadLook(a_Entity);
+	}  // for itr - LoadedByClient[]
+}
+
+
+
+
+
+void cChunk::BroadcastEntityLook(const cEntity & a_Entity, const cClientHandle * a_Exclude)
+{
+	for (cClientHandleList::const_iterator itr = m_LoadedByClient.begin(); itr != m_LoadedByClient.end(); ++itr )
+	{
+		if (*itr == a_Exclude)
+		{
+			continue;
+		}
+		(*itr)->SendEntityLook(a_Entity);
+	}  // for itr - LoadedByClient[]
+}
+
+
+
+
+
+void cChunk::BroadcastEntityMetadata(const cEntity & a_Entity, const cClientHandle * a_Exclude)
+{
+	for (cClientHandleList::const_iterator itr = m_LoadedByClient.begin(); itr != m_LoadedByClient.end(); ++itr )
+	{
+		if (*itr == a_Exclude)
+		{
+			continue;
+		}
+		(*itr)->SendEntityMetadata(a_Entity);
+	}  // for itr - LoadedByClient[]
+}
+
+
+
+
+
+void cChunk::BroadcastEntityRelMove(const cEntity & a_Entity, char a_RelX, char a_RelY, char a_RelZ, const cClientHandle * a_Exclude)
+{
+	for (cClientHandleList::const_iterator itr = m_LoadedByClient.begin(); itr != m_LoadedByClient.end(); ++itr )
+	{
+		if (*itr == a_Exclude)
+		{
+			continue;
+		}
+		(*itr)->SendEntityRelMove(a_Entity, a_RelX, a_RelY, a_RelZ);
+	}  // for itr - LoadedByClient[]
+}
+
+
+
+
+
+void cChunk::BroadcastEntityRelMoveLook(const cEntity & a_Entity, char a_RelX, char a_RelY, char a_RelZ, const cClientHandle * a_Exclude)
+{
+	for (cClientHandleList::const_iterator itr = m_LoadedByClient.begin(); itr != m_LoadedByClient.end(); ++itr )
+	{
+		if (*itr == a_Exclude)
+		{
+			continue;
+		}
+		(*itr)->SendEntityRelMoveLook(a_Entity, a_RelX, a_RelY, a_RelZ);
+	}  // for itr - LoadedByClient[]
+}
+
+
+
+
+
+void cChunk::BroadcastEntityStatus(const cEntity & a_Entity, char a_Status, const cClientHandle * a_Exclude)
+{
+	for (cClientHandleList::const_iterator itr = m_LoadedByClient.begin(); itr != m_LoadedByClient.end(); ++itr )
+	{
+		if (*itr == a_Exclude)
+		{
+			continue;
+		}
+		(*itr)->SendEntityStatus(a_Entity, a_Status);
+	}  // for itr - LoadedByClient[]
+}
+
+
+
+
+
+void cChunk::BroadcastEntityVelocity(const cEntity & a_Entity, const cClientHandle * a_Exclude)
+{
+	for (cClientHandleList::const_iterator itr = m_LoadedByClient.begin(); itr != m_LoadedByClient.end(); ++itr )
+	{
+		if (*itr == a_Exclude)
+		{
+			continue;
+		}
+		(*itr)->SendEntityVelocity(a_Entity);
+	}  // for itr - LoadedByClient[]
+}
+
+
+
+
+
+void cChunk::BroadcastPlayerAnimation(const cPlayer & a_Player, char a_Animation, const cClientHandle * a_Exclude)
+{
+	for (cClientHandleList::const_iterator itr = m_LoadedByClient.begin(); itr != m_LoadedByClient.end(); ++itr )
+	{
+		if (*itr == a_Exclude)
+		{
+			continue;
+		}
+		(*itr)->SendPlayerAnimation(a_Player, a_Animation);
+	}  // for itr - LoadedByClient[]
+}
+
+
+
+
+
+void cChunk::BroadcastSoundEffect(const AString & a_SoundName, int a_SrcX, int a_SrcY, int a_SrcZ, float a_Volume, float a_Pitch, const cClientHandle * a_Exclude)
+{
+	for (cClientHandleList::iterator itr = m_LoadedByClient.begin(); itr != m_LoadedByClient.end(); ++itr )
+	{
+		if (*itr == a_Exclude)
+		{
+			continue;
+		}
+		(*itr)->SendSoundEffect(a_SoundName, a_SrcX, a_SrcY, a_SrcZ, a_Volume, a_Pitch);
+	}  // for itr - LoadedByClient[]
+}
+
+
+
+
+
+void cChunk::BroadcastSoundParticleEffect(int a_EffectID, int a_SrcX, int a_SrcY, int a_SrcZ, int a_Data, const cClientHandle * a_Exclude)
+{
+	for (cClientHandleList::iterator itr = m_LoadedByClient.begin(); itr != m_LoadedByClient.end(); ++itr )
+	{
+		if (*itr == a_Exclude)
+		{
+			continue;
+		}
+		(*itr)->SendSoundParticleEffect(a_EffectID, a_SrcX, a_SrcY, a_SrcZ, a_Data);
+	}  // for itr - LoadedByClient[]
+}
+
+
+
+
+
+void cChunk::BroadcastSpawnEntity(cEntity & a_Entity, const cClientHandle * a_Exclude)
+{
+	for (cClientHandleList::iterator itr = m_LoadedByClient.begin(); itr != m_LoadedByClient.end(); ++itr )
+	{
+		if (*itr == a_Exclude)
+		{
+			continue;
+		}
+		a_Entity.SpawnOn(*(*itr));
+	}  // for itr - LoadedByClient[]
+}
+
+
+
+
+
+void cChunk::BroadcastThunderbolt(int a_BlockX, int a_BlockY, int a_BlockZ, const cClientHandle * a_Exclude)
+{
+	for (cClientHandleList::iterator itr = m_LoadedByClient.begin(); itr != m_LoadedByClient.end(); ++itr )
+	{
+		if (*itr == a_Exclude)
+		{
+			continue;
+		}
+		(*itr)->SendThunderbolt(a_BlockX, a_BlockY, a_BlockZ);
+	}  // for itr - LoadedByClient[]
+}
+
+
+
+
+
+void cChunk::BroadcastUseBed(const cEntity & a_Entity, int a_BlockX, int a_BlockY, int a_BlockZ )
+{
+	for (cClientHandleList::iterator itr = m_LoadedByClient.begin(); itr != m_LoadedByClient.end(); ++itr )
+	{
+		(*itr)->SendUseBed(a_Entity, a_BlockX, a_BlockY, a_BlockZ);
+	}  // for itr - LoadedByClient[]
+}
+
+
+
+
+
+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)
+	{
+		return;
+	}
+	Entity->SendTo(a_Client);
+}
+
+
+
+
+
+void cChunk::PositionToWorldPosition(int a_RelX, int a_RelY, int a_RelZ, int & a_BlockX, int & a_BlockY, int & a_BlockZ)
+{
+	a_BlockY = a_RelY;
+	a_BlockX = m_PosX * Width + a_RelX;
+	a_BlockZ = m_PosZ * Width + a_RelZ;
+}
+
+
+
+
+
+Vector3i cChunk::PositionToWorldPosition(int a_RelX, int a_RelY, int a_RelZ)
+{
+	return Vector3i(m_PosX * Width + a_RelX, m_PosY * Height + a_RelY, m_PosZ * Width + a_RelZ);
+}
+
+
+
+
+
+NIBBLETYPE cChunk::GetTimeAlteredLight(NIBBLETYPE a_Skylight) const
+{
+	a_Skylight -= m_World->GetSkyDarkness();
+	// Because NIBBLETYPE is unsigned, we clamp it to 0 .. 15 by checking for values above 15
+	return (a_Skylight < 16)? a_Skylight : 0;
+}
+
+
+
+
+
+#if !C_CHUNK_USE_INLINE
+# include "cChunk.inl.h"
+#endif
+
+
+
+