13 files changed, 221 insertions, 163 deletions

diff --git a/src/Chunk.cpp b/src/Chunk.cpp
index 99311c1b1..efeb3b1e4 100644
--- a/src/Chunk.cpp
+++ b/src/Chunk.cpp
@@ -123,9 +123,9 @@ cChunk::cChunk(
 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;
@@ -143,7 +143,7 @@ cChunk::~cChunk()
 			delete *itr;
 		}
 	}
-	
+
 	if (m_NeighborXM != nullptr)
 	{
 		m_NeighborXM->m_NeighborXP = nullptr;
@@ -284,12 +284,12 @@ void cChunk::GetAllData(cChunkDataCallback & a_Callback)
 	a_Callback.LightIsValid(m_IsLightValid);
 
 	a_Callback.ChunkData(m_ChunkData);
-	
+
 	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);
@@ -305,7 +305,7 @@ void cChunk::SetAllData(cSetChunkData & a_SetChunkData)
 	ASSERT(a_SetChunkData.IsHeightMapValid());
 	ASSERT(a_SetChunkData.AreBiomesValid());
 	ASSERT(IsQueued());
-	
+
 	memcpy(m_BiomeMap, a_SetChunkData.GetBiomes(), sizeof(m_BiomeMap));
 	memcpy(m_HeightMap, a_SetChunkData.GetHeightMap(), sizeof(m_HeightMap));
 
@@ -339,19 +339,19 @@ void cChunk::SetAllData(cSetChunkData & a_SetChunkData)
 			ASSERT(WorldBlockType == EntityBlockType);
 		}  // for itr - m_BlockEntities
 	#endif  // _DEBUG
-	
+
 	// 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)
 	SetPresence(cpPresent);
-	
+
 	// Wake up all simulators for their respective blocks:
 	WakeUpSimulators();
 
@@ -399,7 +399,7 @@ void cChunk::WriteBlockArea(cBlockArea & a_Area, int a_MinBlockX, int a_MinBlock
 		);
 		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);
@@ -541,7 +541,7 @@ void cChunk::SpawnMobs(cMobSpawner & a_MobSpawner)
 	{
 		return;
 	}
-	
+
 	a_MobSpawner.NewPack();
 	int NumberOfTries = 0;
 	int NumberOfSuccess = 0;
@@ -561,7 +561,7 @@ void cChunk::SpawnMobs(cMobSpawner & a_MobSpawner)
 
 		ASSERT(TryY > 0);
 		ASSERT(TryY < cChunkDef::Height - 1);
-		
+
 		EMCSBiome Biome = m_ChunkMap->GetBiomeAt(TryX, TryZ);
 		// MG TODO :
 		// Moon cycle (for slime)
@@ -569,7 +569,7 @@ void cChunk::SpawnMobs(cMobSpawner & a_MobSpawner)
 		// check mobs presence on the block
 
 		// MG TODO : check that "Level" really means Y
-		
+
 		/*
 		NIBBLETYPE SkyLight = 0;
 
@@ -581,7 +581,7 @@ void cChunk::SpawnMobs(cMobSpawner & a_MobSpawner)
 		{
 			continue;
 		}
-		
+
 		cEntity * newMob = a_MobSpawner.TryToSpawnHere(this, TryX, TryY, TryZ, Biome, MaxNbOfSuccess);
 		if (newMob == nullptr)
 		{
@@ -606,10 +606,10 @@ void cChunk::Tick(std::chrono::milliseconds a_Dt)
 	BroadcastPendingBlockChanges();
 
 	CheckBlocks();
-	
+
 	// Tick simulators:
 	m_World->GetSimulatorManager()->SimulateChunk(a_Dt, m_PosX, m_PosZ, this);
-	
+
 	TickBlocks();
 
 	// Tick all block entities in this chunk:
@@ -617,7 +617,7 @@ void cChunk::Tick(std::chrono::milliseconds a_Dt)
 	{
 		m_IsDirty = (*itr)->Tick(a_Dt, *this) | m_IsDirty;
 	}
-	
+
 	for (cEntityList::iterator itr = m_Entities.begin(); itr != m_Entities.end();)
 	{
 		if (!((*itr)->IsMob()))  // Mobs are ticked inside cWorld::TickMobs() (as we don't have to tick them if they are far away from players)
@@ -657,7 +657,7 @@ void cChunk::Tick(std::chrono::milliseconds a_Dt)
 			++itr;
 		}
 	}  // for itr - m_Entitites[]
-	
+
 	ApplyWeatherToTop();
 }
 
@@ -715,7 +715,7 @@ void cChunk::MoveEntityToNewChunk(cEntity * a_Entity)
 			m_Entity(a_CallbackEntity)
 		{}
 	} Mover(a_Entity);
-	
+
 	m_ChunkMap->CompareChunkClients(this, Neighbor, Mover);
 }
 
@@ -761,10 +761,10 @@ void cChunk::CheckBlocks()
 	}
 	std::vector<Vector3i> ToTickBlocks;
 	std::swap(m_ToTickBlocks, ToTickBlocks);
-	
+
 	cChunkInterface ChunkInterface(m_World->GetChunkMap());
 	cBlockInServerPluginInterface PluginInterface(*m_World);
-	
+
 	for (std::vector<Vector3i>::const_iterator itr = ToTickBlocks.begin(), end = ToTickBlocks.end(); itr != end; ++itr)
 	{
 		Vector3i Pos = (*itr);
@@ -788,17 +788,17 @@ void cChunk::TickBlocks(void)
 	int TickX = m_BlockTickX;
 	int TickY = m_BlockTickY;
 	int TickZ = m_BlockTickZ;
-	
+
 	cChunkInterface ChunkInterface(this->GetWorld()->GetChunkMap());
 	cBlockInServerPluginInterface PluginInterface(*this->GetWorld());
 
 	// 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),
@@ -836,7 +836,7 @@ void cChunk::ApplyWeatherToTop()
 		// Not the right weather, or not at this tick; bail out
 		return;
 	}
-	
+
 	int X = m_World->GetTickRandomNumber(15);
 	int Z = m_World->GetTickRandomNumber(15);
 
@@ -944,7 +944,7 @@ void cChunk::GrowMelonPumpkin(int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE a_Bl
 		// 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
@@ -955,7 +955,7 @@ void cChunk::GrowMelonPumpkin(int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE a_Bl
 		case 2: z =  1; break;
 		case 3: z = -1; break;
 	}
-	
+
 	// Check that the block in that direction is empty:
 	switch (BlockType[CheckType])
 	{
@@ -968,7 +968,7 @@ void cChunk::GrowMelonPumpkin(int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE a_Bl
 		}
 		default: return;
 	}
-	
+
 	// Check if there's soil under the neighbor. We already know the neighbors are valid. Place produce if ok
 	BLOCKTYPE Soil;
 	VERIFY(UnboundedRelGetBlock(a_RelX + x, a_RelY - 1, a_RelZ + z, Soil, BlockMeta));
@@ -1019,7 +1019,7 @@ void cChunk::GrowSugarcane(int a_RelX, int a_RelY, int a_RelZ, int a_NumBlocks)
 	{
 		--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++)
@@ -1060,7 +1060,7 @@ void cChunk::GrowCactus(int a_RelX, int a_RelY, int a_RelZ, int a_NumBlocks)
 	{
 		--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++)
@@ -1273,7 +1273,7 @@ void cChunk::UnboundedQueueTickBlock(int a_RelX, int a_RelY, int 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];
@@ -1410,7 +1410,7 @@ 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, bool a_SendToClients)
 {
 	FastSetBlock(a_RelX, a_RelY, a_RelZ, a_BlockType, a_BlockMeta, a_SendToClients);
-	
+
 	// Tick this block and its neighbors:
 	m_ToTickBlocks.push_back(Vector3i(a_RelX, a_RelY, a_RelZ));
 	QueueTickBlockNeighbors(a_RelX, a_RelY, a_RelZ);
@@ -1425,7 +1425,7 @@ void cChunk::SetBlock(int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE a_BlockType,
 		delete BlockEntity;
 		BlockEntity = nullptr;
 	}
-	
+
 	// If the new block is a block entity, create the entity object:
 	switch (a_BlockType)
 	{
@@ -1470,7 +1470,7 @@ void cChunk::QueueTickBlock(int a_RelX, int a_RelY, int a_RelZ)
 	{
 		return;
 	}
-	
+
 	m_ToTickBlocks.push_back(Vector3i(a_RelX, a_RelY, a_RelZ));
 }
 
@@ -1508,7 +1508,7 @@ void cChunk::FastSetBlock(int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE a_BlockT
 	ASSERT(!((a_RelX < 0) || (a_RelX >= Width) || (a_RelY < 0) || (a_RelY >= Height) || (a_RelZ < 0) || (a_RelZ >= Width)));
 
 	ASSERT(IsValid());
-	
+
 	const BLOCKTYPE OldBlockType = GetBlock(a_RelX, a_RelY, a_RelZ);
 	const BLOCKTYPE OldBlockMeta = m_ChunkData.GetMeta(a_RelX, a_RelY, a_RelZ);
 	if ((OldBlockType == a_BlockType) && (OldBlockMeta == a_BlockMeta))
@@ -1543,7 +1543,7 @@ 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));
 	}
-	
+
 	m_ChunkData.SetMeta(a_RelX, a_RelY, a_RelZ, a_BlockMeta);
 
 	// ONLY recalculate lighting if it's necessary!
@@ -1593,7 +1593,7 @@ void cChunk::SendBlockTo(int a_RelX, int a_RelY, int a_RelZ, cClientHandle * a_C
 
 	Vector3i wp = PositionToWorldPosition(a_RelX, a_RelY, a_RelZ);
 	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)
 	{
@@ -1637,7 +1637,7 @@ cBlockEntity * cChunk::GetBlockEntity(int a_BlockX, int a_BlockY, int a_BlockZ)
 			return *itr;
 		}
 	}  // for itr - m_BlockEntities[]
-	
+
 	return nullptr;
 }
 
@@ -1704,7 +1704,7 @@ void cChunk::SetAreaBiome(int a_MinRelX, int a_MaxRelX, int a_MinRelZ, int a_Max
 		}
 	}
 	MarkDirty();
-	
+
 	// Re-send the chunk to all clients:
 	for (auto ClientHandle : m_LoadedByClient)
 	{
@@ -1721,7 +1721,7 @@ 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()))
@@ -2150,14 +2150,14 @@ bool cChunk::DoWithBlockEntityAt(int a_BlockX, int a_BlockY, int a_BlockZ, cBloc
 		{
 			continue;
 		}
-		
+
 		if (a_Callback.Item(*itr))
 		{
 			return false;
 		}
 		return true;
 	}  // for itr - m_BlockEntitites[]
-	
+
 	// Not found:
 	return false;
 }
@@ -2180,7 +2180,7 @@ bool cChunk::DoWithBeaconAt(int a_BlockX, int a_BlockY, int a_BlockZ, cBeaconCal
 			// 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(reinterpret_cast<cBeaconEntity *>(*itr)))
 		{
@@ -2188,7 +2188,7 @@ bool cChunk::DoWithBeaconAt(int a_BlockX, int a_BlockY, int a_BlockZ, cBeaconCal
 		}
 		return true;
 	}  // for itr - m_BlockEntitites[]
-	
+
 	// Not found:
 	return false;
 }
@@ -2244,7 +2244,7 @@ bool cChunk::DoWithChestAt(int a_BlockX, int a_BlockY, int a_BlockZ, cChestCallb
 			// 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(reinterpret_cast<cChestEntity *>(*itr)))
 		{
@@ -2252,7 +2252,7 @@ bool cChunk::DoWithChestAt(int a_BlockX, int a_BlockY, int a_BlockZ, cChestCallb
 		}
 		return true;
 	}  // for itr - m_BlockEntitites[]
-	
+
 	// Not found:
 	return false;
 }
@@ -2276,7 +2276,7 @@ bool cChunk::DoWithDispenserAt(int a_BlockX, int a_BlockY, int a_BlockZ, cDispen
 			// 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(reinterpret_cast<cDispenserEntity *>(*itr)))
 		{
@@ -2284,7 +2284,7 @@ bool cChunk::DoWithDispenserAt(int a_BlockX, int a_BlockY, int a_BlockZ, cDispen
 		}
 		return true;
 	}  // for itr - m_BlockEntitites[]
-	
+
 	// Not found:
 	return false;
 }
@@ -2308,7 +2308,7 @@ bool cChunk::DoWithDropperAt(int a_BlockX, int a_BlockY, int a_BlockZ, cDropperC
 			// 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(reinterpret_cast<cDropperEntity *>(*itr)))
 		{
@@ -2316,7 +2316,7 @@ bool cChunk::DoWithDropperAt(int a_BlockX, int a_BlockY, int a_BlockZ, cDropperC
 		}
 		return true;
 	}  // for itr - m_BlockEntitites[]
-	
+
 	// Not found:
 	return false;
 }
@@ -2340,7 +2340,7 @@ bool cChunk::DoWithDropSpenserAt(int a_BlockX, int a_BlockY, int a_BlockZ, cDrop
 			// 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(reinterpret_cast<cDropSpenserEntity *>(*itr)))
 		{
@@ -2348,7 +2348,7 @@ bool cChunk::DoWithDropSpenserAt(int a_BlockX, int a_BlockY, int a_BlockZ, cDrop
 		}
 		return true;
 	}  // for itr - m_BlockEntitites[]
-	
+
 	// Not found:
 	return false;
 }
@@ -2380,7 +2380,7 @@ bool cChunk::DoWithFurnaceAt(int a_BlockX, int a_BlockY, int a_BlockZ, cFurnaceC
 				return false;
 			}
 		}  // switch (BlockType)
-		
+
 		// The correct block entity is here,
 		if (a_Callback.Item(reinterpret_cast<cFurnaceEntity *>(*itr)))
 		{
@@ -2388,7 +2388,7 @@ bool cChunk::DoWithFurnaceAt(int a_BlockX, int a_BlockY, int a_BlockZ, cFurnaceC
 		}
 		return true;
 	}  // for itr - m_BlockEntitites[]
-	
+
 	// Not found:
 	return false;
 }
@@ -2412,7 +2412,7 @@ bool cChunk::DoWithNoteBlockAt(int a_BlockX, int a_BlockY, int a_BlockZ, cNoteBl
 			// 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(reinterpret_cast<cNoteEntity *>(*itr)))
 		{
@@ -2420,7 +2420,7 @@ bool cChunk::DoWithNoteBlockAt(int a_BlockX, int a_BlockY, int a_BlockZ, cNoteBl
 		}
 		return true;
 	}  // for itr - m_BlockEntitites[]
-	
+
 	// Not found:
 	return false;
 }
@@ -2444,7 +2444,7 @@ bool cChunk::DoWithCommandBlockAt(int a_BlockX, int a_BlockY, int a_BlockZ, cCom
 			// 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(reinterpret_cast<cCommandBlockEntity *>(*itr)))
 		{
@@ -2452,7 +2452,7 @@ bool cChunk::DoWithCommandBlockAt(int a_BlockX, int a_BlockY, int a_BlockZ, cCom
 		}
 		return true;
 	}  // for itr - m_BlockEntitites[]
-	
+
 	// Not found:
 	return false;
 }
@@ -2476,7 +2476,7 @@ bool cChunk::DoWithMobHeadAt(int a_BlockX, int a_BlockY, int a_BlockZ, cMobHeadC
 			// 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(reinterpret_cast<cMobHeadEntity *>(*itr)))
 		{
@@ -2484,7 +2484,7 @@ bool cChunk::DoWithMobHeadAt(int a_BlockX, int a_BlockY, int a_BlockZ, cMobHeadC
 		}
 		return true;
 	}  // for itr - m_BlockEntitites[]
-	
+
 	// Not found:
 	return false;
 }
@@ -2508,7 +2508,7 @@ bool cChunk::DoWithFlowerPotAt(int a_BlockX, int a_BlockY, int a_BlockZ, cFlower
 			// 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(reinterpret_cast<cFlowerPotEntity *>(*itr)))
 		{
@@ -2516,7 +2516,7 @@ bool cChunk::DoWithFlowerPotAt(int a_BlockX, int a_BlockY, int a_BlockZ, cFlower
 		}
 		return true;
 	}  // for itr - m_BlockEntitites[]
-	
+
 	// Not found:
 	return false;
 }
@@ -2546,11 +2546,11 @@ bool cChunk::GetSignLines(int a_BlockX, int a_BlockY, int a_BlockZ, AString & a_
 				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;
 }
@@ -2600,6 +2600,31 @@ void cChunk::GetBlockInfo(int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE & a_Bloc
 
 
 
+
+bool cChunk::GetChunkAndRelByAbsolute(const Vector3d & a_Position, cChunk ** a_Chunk, Vector3i & a_Rel)
+{
+	return GetChunkAndRelByAbsolute(Vector3i(FloorC(a_Position.x), FloorC(a_Position.y), FloorC(a_Position.z)), a_Chunk, a_Rel);
+}
+
+
+
+
+
+bool cChunk::GetChunkAndRelByAbsolute(const Vector3i & a_Position, cChunk ** a_Chunk, Vector3i & a_Rel)
+{
+	*a_Chunk = this->GetNeighborChunk(a_Position.x, a_Position.z);
+	if ((*a_Chunk == nullptr) || !(*a_Chunk)->IsValid())
+	{
+		return false;
+	}
+
+	a_Rel.x = a_Position.x - (*a_Chunk)->GetPosX() * cChunkDef::Width;
+	a_Rel.y = a_Position.y;
+	a_Rel.z = a_Position.z - (*a_Chunk)->GetPosZ() * cChunkDef::Width;
+	return true;
+}
+
+
 cChunk * cChunk::GetNeighborChunk(int a_BlockX, int a_BlockZ)
 {
 	// Convert coords to relative, then call the relative version:
@@ -2652,7 +2677,7 @@ cChunk * cChunk::GetRelNeighborChunk(int a_RelX, int a_RelZ)
 		// 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 != nullptr)
@@ -2671,7 +2696,7 @@ cChunk * cChunk::GetRelNeighborChunk(int a_RelX, int a_RelZ)
 		}
 		return nullptr;
 	}
-	
+
 	return (ReturnThis ? this : nullptr);
 }
 
@@ -2691,7 +2716,7 @@ cChunk * cChunk::GetRelNeighborChunkAdjustCoords(int & a_RelX, int & a_RelZ) con
 	{
 		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;
@@ -2721,7 +2746,7 @@ cChunk * cChunk::GetRelNeighborChunkAdjustCoords(int & a_RelX, int & a_RelZ) con
 		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;
diff --git a/src/Chunk.h b/src/Chunk.h
index b2cf90cb9..d944af10a 100644
--- a/src/Chunk.h
+++ b/src/Chunk.h
@@ -63,7 +63,9 @@ typedef cItemCallback<cCommandBlockEntity> cCommandBlockCallback;
 typedef cItemCallback<cMobHeadEntity>      cMobHeadCallback;
 typedef cItemCallback<cFlowerPotEntity>    cFlowerPotCallback;
 
-
+// A convenience macro for calling GetChunkAndRelByAbsolute.
+#define PREPARE_REL_AND_CHUNK(Position, OriginalChunk) cChunk * Chunk; Vector3i Rel; bool RelSuccess = (OriginalChunk).GetChunkAndRelByAbsolute(Position, &Chunk, Rel);
+#define PREPARE_BLOCKDATA BLOCKTYPE BlockType; NIBBLETYPE BlockMeta;
 
 
 // This class is not to be used directly
@@ -109,9 +111,9 @@ public:
 	bool IsDirty(void) const {return m_IsDirty; }
 
 	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())
@@ -126,34 +128,34 @@ public:
 	/** Marks the chunk as failed to load.
 	If m_ShouldGenerateIfLoadFailed is set, queues the chunk for generating. */
 	void MarkLoadFailed(void);
-	
+
 	/** Gets all chunk data, calls the a_Callback's methods for each data type */
 	void GetAllData(cChunkDataCallback & a_Callback);
-	
+
 	/** Sets all chunk data as either loaded from the storage or generated.
 	BlockLight and BlockSkyLight are optional, if not present, chunk will be marked as unlighted.
 	Modifies the BlockEntity list in a_SetChunkData - moves the block entities into the chunk. */
 	void SetAllData(cSetChunkData & a_SetChunkData);
-	
+
 	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);
-	
+
 	/** Writes the specified cBlockArea at the coords specified. Note that the coords may extend beyond the chunk! */
 	void WriteBlockArea(cBlockArea & a_Area, int a_MinBlockX, int a_MinBlockY, int a_MinBlockZ, int a_DataTypes);
 
 	/** 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.
 	The flag is cumulative - it can be set multiple times and then needs to be un-set that many times
 	before the chunk is unloadable again. */
 	void Stay(bool a_Stay = true);
-	
+
 	/** Recence all mobs proximities to players in order to know what to do with them */
 	void CollectMobCensus(cMobCensus & toFill);
 
@@ -161,22 +163,22 @@ public:
 	void SpawnMobs(cMobSpawner & a_MobSpawner);
 
 	void Tick(std::chrono::milliseconds a_Dt);
-	
+
 	/** Ticks a single block. Used by cWorld::TickQueuedBlocks() to tick the queued blocks */
 	void TickBlock(int a_RelX, int a_RelY, int a_RelZ);
 
 	int GetPosX(void) const { return m_PosX; }
 	int GetPosZ(void) const { return m_PosZ; }
-	
+
 	cWorld * GetWorld(void) const { return m_World; }
 
 	void SetBlock(int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta, bool a_SendToClients = true);
 	// 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); }
-	
+
 	/** Queues block for ticking (m_ToTickQueue) */
 	void QueueTickBlock(int a_RelX, int a_RelY, int a_RelZ);
-	
+
 	/** Queues all 6 neighbors of the specified block for ticking (m_ToTickQueue). If any are outside the chunk, relays the checking to the proper neighboring chunk */
 	void QueueTickBlockNeighbors(int a_RelX, int a_RelY, int a_RelZ);
 
@@ -185,18 +187,38 @@ public:
 	BLOCKTYPE GetBlock(const Vector3i & a_RelCoords) const { return GetBlock(a_RelCoords.x, a_RelCoords.y, a_RelCoords.z); }
 	void      GetBlockTypeMeta(int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE & a_BlockType, NIBBLETYPE & a_BlockMeta) const;
 	void      GetBlockInfo    (int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE & a_BlockType, NIBBLETYPE & a_Meta, NIBBLETYPE & a_SkyLight, NIBBLETYPE & a_BlockLight);
-	
+
+	/** Convert absolute coordinates into relative coordinates.
+	Returns false on failure to obtain a valid chunk. Returns true otherwise.
+	@param a_Position The position you'd like to convert, a_Position need not be in the calling chunk and can safely be out
+	of its bounds, but for best performance, it should not be too far from the calling chunk.
+	@param a_Chunk Returns the chunk in which a_Position is in. If a_Position is within the calling chunk's bounds,
+	returns the calling chunk. For best performance, a_Position shouldn't be too far from the calling chunk.
+	@param a_Rel Returns the converted relative position. Note that it is relative to the returned a_Chunk.
+	The vector will not be modified if the function returns false. */
+	bool GetChunkAndRelByAbsolute(const Vector3d & a_Position, cChunk ** a_Chunk, Vector3i & a_Rel);
+
+	/** Convert absolute coordinates into relative coordinates.
+	Returns false on failure to obtain a valid chunk. Returns true otherwise.
+	@param a_Position The position you'd like to convert, a_Position need not be in the calling chunk and can safely be out
+	of its bounds, but for best performance, it should not be too far from the calling chunk.
+	@param a_Chunk Returns the chunk in which a_Position is in. If a_Position is within the calling chunk's bounds,
+	returns the calling chunk. For best performance, a_Position shouldn't be too far from the calling chunk.
+	@param a_Rel Returns the converted relative position. Note that it is relative to the returned a_Chunk.
+	The vector will not be modified if the function returns false. */
+	bool GetChunkAndRelByAbsolute(const Vector3i & a_Position, cChunk ** a_Chunk, Vector3i & a_Rel);
+
 	/** Returns the chunk into which the specified block belongs, by walking the neighbors.
 	Will return self if appropriate. Returns nullptr if not reachable through neighbors.
 	*/
 	cChunk * GetNeighborChunk(int a_BlockX, int a_BlockZ);
-	
+
 	/**
 	Returns the chunk into which the relatively-specified block belongs, by walking the neighbors.
 	Will return self if appropriate. Returns nullptr if not reachable through neighbors.
 	*/
 	cChunk * GetRelNeighborChunk(int a_RelX, int a_RelZ);
-	
+
 	/**
 	Returns the chunk into which the relatively-specified block belongs.
 	Also modifies the relative coords from this-relative to return-relative.
@@ -204,19 +226,19 @@ public:
 	Will try walking the neighbors first; if that fails, will query the chunkmap
 	*/
 	cChunk * GetRelNeighborChunkAdjustCoords(int & a_RelX, int & a_RelZ) const;
-	
+
 	EMCSBiome GetBiomeAt(int a_RelX, int a_RelZ) const {return cChunkDef::GetBiome(m_BiomeMap, a_RelX, a_RelZ); }
-	
+
 	/** Sets the biome at the specified relative coords.
 	Doesn't resend the chunk to clients. */
 	void SetBiomeAt(int a_RelX, int a_RelZ, EMCSBiome a_Biome);
-	
+
 	/** Sets the biome in the specified relative coords area. All the coords are inclusive.
 	Sends the chunk to all relevant clients. */
 	void SetAreaBiome(int a_MinRelX, int a_MaxRelX, int a_MinRelZ, int a_MaxRelZ, EMCSBiome a_Biome);
-	
+
 	void CollectPickupsByPlayer(cPlayer & a_Player);
-	
+
 	/** Sets the sign text. Returns true if successful. Also sends update packets to all clients in the chunk */
 	bool SetSignLines(int a_RelX, int a_RelY, int a_RelZ, const AString & a_Line1, const AString & a_Line2, const AString & a_Line3, const AString & a_Line4);
 
@@ -226,20 +248,20 @@ public:
 
 	/** Adds a client to the chunk; returns true if added, false if already there */
 	bool AddClient(cClientHandle * a_Client);
-	
+
 	/** Removes the specified client from the chunk; ignored if client not in chunk. */
 	void RemoveClient(cClientHandle * a_Client);
-	
+
 	/** Returns true if the specified client is present in this chunk. */
 	bool HasClient(cClientHandle * a_Client);
-	
+
 	/** Returns true if theres any client in the chunk; false otherwise */
 	bool HasAnyClients(void) const;
 
 	void AddEntity(cEntity * a_Entity);
 	void RemoveEntity(cEntity * a_Entity);
 	bool HasEntity(UInt32 a_EntityID);
-	
+
 	/** 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
 
@@ -270,10 +292,10 @@ public:
 
 	/** 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 block entity at the specified coords; returns false if there's no block entity at those coords, true if found */
 	bool DoWithBlockEntityAt(int a_BlockX, int a_BlockY, int a_BlockZ, cBlockEntityCallback & a_Callback);  // Lua-acessible
-	
+
 	/** Calls the callback for the beacon at the specified coords; returns false if there's no beacon at those coords, true if found */
 	bool DoWithBeaconAt(int a_BlockX, int a_BlockY, int a_BlockZ, cBeaconCallback & a_Callback);  // Lua-acessible
 
@@ -300,7 +322,7 @@ public:
 
 	/** Calls the callback for the command block at the specified coords; returns false if there's no command block at those coords or callback returns true, returns true if found */
 	bool DoWithCommandBlockAt(int a_BlockX, int a_BlockY, int a_BlockZ, cCommandBlockCallback & a_Callback);
-	
+
 	/** Calls the callback for the mob head block at the specified coords; returns false if there's no mob head block at those coords or callback returns true, returns true if found */
 	bool DoWithMobHeadAt(int a_BlockX, int a_BlockY, int a_BlockZ, cMobHeadCallback & a_Callback);
 
@@ -341,14 +363,14 @@ public:
 	void BroadcastSpawnEntity        (cEntity & a_Entity, const cClientHandle * a_Exclude = nullptr);
 	void BroadcastThunderbolt        (int a_BlockX, int a_BlockY, int a_BlockZ, const cClientHandle * a_Exclude = nullptr);
 	void BroadcastUseBed             (const cEntity & a_Entity, int a_BlockX, int a_BlockY, int a_BlockZ);
-	
+
 	void SendBlockEntity             (int a_BlockX, int a_BlockY, int a_BlockZ, cClientHandle & a_Client);
 
 	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);
 
@@ -357,7 +379,7 @@ public:
 		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)
 	{
@@ -365,7 +387,7 @@ public:
 		m_BlockTickY = a_RelY;
 		m_BlockTickZ = a_RelZ;
 	}
-	
+
 	inline NIBBLETYPE GetMeta(int a_RelX, int a_RelY, int a_RelZ) const
 	{
 		return m_ChunkData.GetMeta(a_RelX, a_RelY, a_RelZ);
@@ -377,23 +399,32 @@ public:
 			{
 				MarkDirty();
 				m_IsRedstoneDirty = true;
-				
+
 				m_PendingSendBlocks.push_back(sSetBlock(m_PosX, m_PosZ, a_RelX, a_RelY, a_RelZ, GetBlock(a_RelX, a_RelY, a_RelZ), a_Meta));
 			}
 	}
 
+	/** Light alterations based on time */
+	NIBBLETYPE GetTimeAlteredLight(NIBBLETYPE a_Skylight) const;
+
+	/** Get the level of artificial light illuminating the block (0 - 15) */
 	inline NIBBLETYPE GetBlockLight(int a_RelX, int a_RelY, int a_RelZ) const {return m_ChunkData.GetBlockLight(a_RelX, a_RelY, a_RelZ); }
+
+	/** Get the level of sky light illuminating the block (0 - 15) independent of daytime. */
 	inline NIBBLETYPE GetSkyLight  (int a_RelX, int a_RelY, int a_RelZ) const {return m_ChunkData.GetSkyLight(a_RelX, a_RelY, a_RelZ); }
-	
+
+	/** Get the level of sky light illuminating the block (0 - 15), taking daytime into a account. */
+	inline NIBBLETYPE GetSkyLightAltered  (int a_RelX, int a_RelY, int a_RelZ) const {return GetTimeAlteredLight(m_ChunkData.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;
-	
+
 	/** Same as GetBlockType(), 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 UnboundedRelGetBlockType(int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE & a_BlockType) const;
-	
+
 	/** Same as GetBlockMeta(), 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 UnboundedRelGetBlockMeta(int a_RelX, int a_RelY, int a_RelZ, NIBBLETYPE & a_BlockMeta) const;
-	
+
 	/** Same as GetBlockBlockLight(), 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 UnboundedRelGetBlockBlockLight(int a_RelX, int a_RelY, int a_RelZ, NIBBLETYPE & a_BlockLight) const;
 
@@ -408,12 +439,10 @@ public:
 
 	/** Same as FastSetBlock(), 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 UnboundedRelFastSetBlock(int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta);
-	
+
 	/** Same as QueueTickBlock(), but relative coords needn't be in this chunk (uses m_Neighbor-s in such a case), ignores unsuccessful attempts */
 	void UnboundedQueueTickBlock(int a_RelX, int a_RelY, int a_RelZ);
 
-	/** Light alterations based on time */
-	NIBBLETYPE GetTimeAlteredLight(NIBBLETYPE a_Skylight) const;
 
 
 	// Per-chunk simulator data:
@@ -429,11 +458,11 @@ public:
 
 	cBlockEntity * GetBlockEntity(int a_BlockX, int a_BlockY, int a_BlockZ);
 	cBlockEntity * GetBlockEntity(const Vector3i & a_BlockPos) { return GetBlockEntity(a_BlockPos.x, a_BlockPos.y, a_BlockPos.z); }
-	
+
 	/** Returns true if the chunk should be ticked in the tick-thread.
 	Checks if there are any clients and if the always-tick flag is set */
 	bool ShouldBeTicked(void) const;
-	
+
 	/** Increments (a_AlwaysTicked == true) or decrements (false) the m_AlwaysTicked counter.
 	If the m_AlwaysTicked counter is greater than zero, the chunk is ticked in the tick-thread regardless of
 	whether it has any clients or not.
@@ -450,7 +479,7 @@ public:
 private:
 
 	friend class cChunkMap;
-	
+
 	struct sSetBlockQueueItem
 	{
 		Int64 m_Tick;
@@ -458,7 +487,7 @@ private:
 		BLOCKTYPE m_BlockType;
 		NIBBLETYPE m_BlockMeta;
 		BLOCKTYPE m_PreviousType;
-		
+
 		sSetBlockQueueItem(int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta, Int64 a_Tick, BLOCKTYPE a_PreviousBlockType) :
 			m_Tick(a_Tick), m_RelX(a_RelX), m_RelY(a_RelY), m_RelZ(a_RelZ), m_BlockType(a_BlockType), m_BlockMeta(a_BlockMeta), m_PreviousType(a_PreviousBlockType)
 		{
@@ -466,7 +495,7 @@ private:
 	} ;
 
 	typedef std::vector<sSetBlockQueueItem> sSetBlockQueueVector;
-	
+
 
 	/** Holds the presence status of the chunk - if it is present, or in the loader / generator queue, or unloaded */
 	ePresence m_Presence;
@@ -478,15 +507,15 @@ private:
 	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
-	
+
 	std::vector<Vector3i> m_ToTickBlocks;
 	sSetBlockVector       m_PendingSendBlocks;  ///< Blocks that have changed and need to be sent to all clients
-	
+
 	// A critical section is not needed, because all chunk access is protected by its parent ChunkMap's csLayers
 	std::vector<cClientHandle *> m_LoadedByClient;
 	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;
 
@@ -500,12 +529,12 @@ private:
 	cChunkDef::BiomeMap  m_BiomeMap;
 
 	int m_BlockTickX, m_BlockTickY, m_BlockTickZ;
-	
+
 	cChunk * m_NeighborXM;  // Neighbor at [X - 1, Z]
 	cChunk * m_NeighborXP;  // Neighbor at [X + 1, Z]
 	cChunk * m_NeighborZM;  // Neighbor at [X,     Z - 1]
 	cChunk * m_NeighborZP;  // Neighbor at [X,     Z + 1]
-	
+
 	// Per-chunk simulator data:
 	cFireSimulatorChunkData m_FireSimulatorData;
 	cFluidSimulatorData *   m_WaterSimulatorData;
@@ -517,12 +546,12 @@ private:
 
 	/** Indicates if simulate-once blocks should be updated by the redstone simulator */
 	bool m_IsRedstoneDirty;
-	
+
 	/** If greater than zero, the chunk is ticked even if it has no clients.
 	Manipulated by the SetAlwaysTicked() function, allows for nested calls of the function.
 	This is the support for plugin-accessible chunk tick forcing. */
 	int m_AlwaysTicked;
-	
+
 
 	// Pick up a random block of this chunk
 	void GetRandomBlockCoords(int & a_X, int & a_Y, int & a_Z);
@@ -533,31 +562,31 @@ private:
 
 	/** Creates a block entity for each block that needs a block entity and doesn't have one in the list */
 	void CreateBlockEntities(void);
-	
+
 	/** Wakes up each simulator for its specific blocks; through all the blocks in the chunk */
 	void WakeUpSimulators(void);
 
 	/** Sends m_PendingSendBlocks to all clients */
 	void BroadcastPendingBlockChanges(void);
-	
+
 	/** Checks the block scheduled for checking in m_ToTickBlocks[] */
 	void CheckBlocks();
-	
+
 	/** Ticks several random blocks in the chunk */
 	void TickBlocks(void);
-	
+
 	/** Adds snow to the top of snowy biomes and hydrates farmland / fills cauldrons in rainy biomes */
 	void ApplyWeatherToTop(void);
-	
+
 	/** 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);
-	
+
 	/** Called by Tick() when an entity moves out of this chunk into a neighbor; moves the entity and sends spawn / despawn packet to clients */
 	void MoveEntityToNewChunk(cEntity * a_Entity);
 };
diff --git a/src/Entities/Entity.h b/src/Entities/Entity.h
index c4f66893d..fdc5437b3 100644
--- a/src/Entities/Entity.h
+++ b/src/Entities/Entity.h
@@ -37,7 +37,6 @@
 
 
 
-
 class cWorld;
 class cClientHandle;
 class cPlayer;
diff --git a/src/Mobs/AggressiveMonster.cpp b/src/Mobs/AggressiveMonster.cpp
index faee4a049..512bfb4a1 100644
--- a/src/Mobs/AggressiveMonster.cpp
+++ b/src/Mobs/AggressiveMonster.cpp
@@ -36,11 +36,11 @@ void cAggressiveMonster::InStateChasing(std::chrono::milliseconds a_Dt, cChunk &
 
 
 
-void cAggressiveMonster::EventSeePlayer(cEntity * a_Entity)
+void cAggressiveMonster::EventSeePlayer(cEntity * a_Entity, cChunk & a_Chunk)
 {
 	if (!static_cast<cPlayer *>(a_Entity)->IsGameModeCreative())
 	{
-		super::EventSeePlayer(a_Entity);
+		super::EventSeePlayer(a_Entity, a_Chunk);
 		m_EMState = CHASING;
 	}
 }
@@ -59,7 +59,7 @@ void cAggressiveMonster::Tick(std::chrono::milliseconds a_Dt, cChunk & a_Chunk)
 	}
 	else
 	{
-		CheckEventSeePlayer();
+		CheckEventSeePlayer(a_Chunk);
 	}
 
 	if (m_Target == nullptr)
diff --git a/src/Mobs/AggressiveMonster.h b/src/Mobs/AggressiveMonster.h
index 13f59842f..f2d6366e2 100644
--- a/src/Mobs/AggressiveMonster.h
+++ b/src/Mobs/AggressiveMonster.h
@@ -19,7 +19,7 @@ public:
 	virtual void Tick          (std::chrono::milliseconds a_Dt, cChunk & a_Chunk) override;
 	virtual void InStateChasing(std::chrono::milliseconds a_Dt, cChunk & a_Chunk) override;
 
-	virtual void EventSeePlayer(cEntity *) override;
+	virtual void EventSeePlayer(cEntity * a_Player, cChunk & a_Chunk) override;
 
 	/** Try to perform attack
 	returns true if attack was deemed successful (hit player, fired projectile, creeper exploded, etc.) even if it didn't actually do damage
diff --git a/src/Mobs/Enderman.cpp b/src/Mobs/Enderman.cpp
index ac749e36a..4a30a0acd 100644
--- a/src/Mobs/Enderman.cpp
+++ b/src/Mobs/Enderman.cpp
@@ -28,32 +28,32 @@ public:
 		{
 			return false;
 		}
-		
+
 		Vector3d Direction = m_EndermanPos - a_Player->GetPosition();
-		
+
 		// Don't check players who are more then SightDistance (64) blocks away
 		if (Direction.Length() > m_SightDistance)
 		{
 			return false;
 		}
-		
+
 		// Don't check if the player has a pumpkin on his head
 		if (a_Player->GetEquippedHelmet().m_ItemType == E_BLOCK_PUMPKIN)
 		{
 			return false;
 		}
 
-		
+
 		Vector3d LookVector = a_Player->GetLookVector();
 		double dot = Direction.Dot(LookVector);
-		
+
 		// 0.09 rad ~ 5 degrees
 		// If the player's crosshair is within 5 degrees of the enderman, it counts as looking
 		if (dot <= cos(0.09))
 		{
 			return false;
 		}
-		
+
 		cTracer LineOfSight(a_Player->GetWorld());
 		if (LineOfSight.Trace(m_EndermanPos, Direction, static_cast<int>(Direction.Length())))
 		{
@@ -64,7 +64,7 @@ public:
 		m_Player = a_Player;
 		return true;
 	}
-	
+
 	cPlayer * GetPlayer(void) const { return m_Player; }
 
 protected:
@@ -102,7 +102,7 @@ void cEnderman::GetDrops(cItems & a_Drops, cEntity * a_Killer)
 
 
 
-void cEnderman::CheckEventSeePlayer()
+void cEnderman::CheckEventSeePlayer(cChunk & a_Chunk)
 {
 	if (m_Target != nullptr)
 	{
@@ -114,7 +114,7 @@ void cEnderman::CheckEventSeePlayer()
 	{
 		return;
 	}
-	
+
 	ASSERT(Callback.GetPlayer() != nullptr);
 
 	if (!CheckLight())
@@ -126,7 +126,7 @@ void cEnderman::CheckEventSeePlayer()
 
 	if (!Callback.GetPlayer()->IsGameModeCreative())
 	{
-		cMonster::EventSeePlayer(Callback.GetPlayer());
+		cMonster::EventSeePlayer(Callback.GetPlayer(), a_Chunk);
 		m_EMState = CHASING;
 		m_bIsScreaming = true;
 		GetWorld()->BroadcastEntityMetadata(*this);
@@ -145,7 +145,7 @@ void cEnderman::CheckEventLostPlayer(void)
 		EventLosePlayer();
 	}
 }
-	
+
 
 
 
diff --git a/src/Mobs/Enderman.h b/src/Mobs/Enderman.h
index 8ccbf2ce7..54859c2cd 100644
--- a/src/Mobs/Enderman.h
+++ b/src/Mobs/Enderman.h
@@ -11,14 +11,14 @@ class cEnderman :
 	public cPassiveAggressiveMonster
 {
 	typedef cPassiveAggressiveMonster super;
-	
+
 public:
 	cEnderman(void);
 
 	CLASS_PROTODEF(cEnderman)
 
 	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = nullptr) override;
-	virtual void CheckEventSeePlayer(void) override;
+	virtual void CheckEventSeePlayer(cChunk & a_Chunk) override;
 	virtual void CheckEventLostPlayer(void) override;
 	virtual void EventLosePlayer(void) override;
 	virtual void Tick(std::chrono::milliseconds a_Dt, cChunk & a_Chunk) override;
diff --git a/src/Mobs/Monster.cpp b/src/Mobs/Monster.cpp
index a24df6bc2..4a543e400 100644
--- a/src/Mobs/Monster.cpp
+++ b/src/Mobs/Monster.cpp
@@ -560,14 +560,14 @@ void cMonster::OnRightClicked(cPlayer & a_Player)
 
 // Checks to see if EventSeePlayer should be fired
 // monster sez: Do I see the player
-void cMonster::CheckEventSeePlayer(void)
+void cMonster::CheckEventSeePlayer(cChunk & a_Chunk)
 {
 	// TODO: Rewrite this to use cWorld's DoWithPlayers()
 	cPlayer * Closest = m_World->FindClosestPlayer(GetPosition(), static_cast<float>(m_SightDistance), false);
 
 	if (Closest != nullptr)
 	{
-		EventSeePlayer(Closest);
+		EventSeePlayer(Closest, a_Chunk);
 	}
 }
 
@@ -596,7 +596,7 @@ void cMonster::CheckEventLostPlayer(void)
 
 // What to do if player is seen
 // default to change state to chasing
-void cMonster::EventSeePlayer(cEntity * a_SeenPlayer)
+void cMonster::EventSeePlayer(cEntity * a_SeenPlayer, cChunk & a_Chunk)
 {
 	m_Target = a_SeenPlayer;
 }
diff --git a/src/Mobs/Monster.h b/src/Mobs/Monster.h
index 1304863b5..7c4683942 100644
--- a/src/Mobs/Monster.h
+++ b/src/Mobs/Monster.h
@@ -67,8 +67,8 @@ public:
 	eFamily GetMobFamily(void) const;
 	// tolua_end
 
-	virtual void CheckEventSeePlayer(void);
-	virtual void EventSeePlayer(cEntity * a_Player);
+	virtual void CheckEventSeePlayer(cChunk & a_Chunk);
+	virtual void EventSeePlayer(cEntity * a_Entity, cChunk & a_Chunk);
 
 	/** Reads the monster configuration for the specified monster name and assigns it to this object. */
 	void GetMonsterConfig(const AString & a_Name);
diff --git a/src/Mobs/PassiveAggressiveMonster.cpp b/src/Mobs/PassiveAggressiveMonster.cpp
index e0abd94a5..71ac7bd89 100644
--- a/src/Mobs/PassiveAggressiveMonster.cpp
+++ b/src/Mobs/PassiveAggressiveMonster.cpp
@@ -25,7 +25,7 @@ bool cPassiveAggressiveMonster::DoTakeDamage(TakeDamageInfo & a_TDI)
 	{
 		return false;
 	}
-	
+
 	if ((m_Target != nullptr) && (m_Target->IsPlayer()))
 	{
 		if (!static_cast<cPlayer *>(m_Target)->IsGameModeCreative())
@@ -39,7 +39,7 @@ bool cPassiveAggressiveMonster::DoTakeDamage(TakeDamageInfo & a_TDI)
 
 
 
-void cPassiveAggressiveMonster::EventSeePlayer(cEntity *)
+void cPassiveAggressiveMonster::EventSeePlayer(cEntity *, cChunk & a_Chunk)
 {
 	// don't do anything, neutral mobs don't react to just seeing the player
 }
diff --git a/src/Mobs/PassiveAggressiveMonster.h b/src/Mobs/PassiveAggressiveMonster.h
index 02dad2f40..00db75385 100644
--- a/src/Mobs/PassiveAggressiveMonster.h
+++ b/src/Mobs/PassiveAggressiveMonster.h
@@ -11,12 +11,12 @@ class cPassiveAggressiveMonster :
 	public cAggressiveMonster
 {
 	typedef cAggressiveMonster super;
-	
+
 public:
 	cPassiveAggressiveMonster(const AString & a_ConfigName, eMonsterType a_MobType, const AString & a_SoundHurt, const AString & a_SoundDeath, double a_Width, double a_Height);
 
 	virtual bool DoTakeDamage(TakeDamageInfo & a_TDI) override;
-	virtual void EventSeePlayer(cEntity *) override;
+	virtual void EventSeePlayer(cEntity *, cChunk & a_Chunk) override;
 } ;
 
 
diff --git a/src/Mobs/Spider.cpp b/src/Mobs/Spider.cpp
index a9da28750..a5f0d6a89 100644
--- a/src/Mobs/Spider.cpp
+++ b/src/Mobs/Spider.cpp
@@ -5,7 +5,7 @@
 
 #include "../World.h"
 #include "../Entities/Player.h"
-
+#include "../Chunk.h"
 
 
 cSpider::cSpider(void) :
@@ -35,17 +35,22 @@ void cSpider::GetDrops(cItems & a_Drops, cEntity * a_Killer)
 
 
 
-void cSpider::EventSeePlayer(cEntity * a_Entity)
+void cSpider::EventSeePlayer(cEntity * a_Entity, cChunk & a_Chunk)
 {
 	if (!GetWorld()->IsChunkLighted(GetChunkX(), GetChunkZ()))
 	{
-		GetWorld()->QueueLightChunk(GetChunkX(), GetChunkZ());
 		return;
 	}
 
-	if (!static_cast<cPlayer *>(a_Entity)->IsGameModeCreative() && (GetWorld()->GetBlockBlockLight(this->GetPosition()) <= 9))
+	PREPARE_REL_AND_CHUNK(GetPosition(), a_Chunk);
+	if (!RelSuccess)
+	{
+		return;
+	}
+
+	if (!static_cast<cPlayer *>(a_Entity)->IsGameModeCreative() && (Chunk->GetSkyLightAltered(Rel.x, Rel.y, Rel.z) <= 9))
 	{
-		super::EventSeePlayer(a_Entity);
+		super::EventSeePlayer(a_Entity, a_Chunk);
 	}
 }
 
diff --git a/src/Mobs/Spider.h b/src/Mobs/Spider.h
index 4f9df7887..85cae92fc 100644
--- a/src/Mobs/Spider.h
+++ b/src/Mobs/Spider.h
@@ -11,14 +11,14 @@ class cSpider :
 	public cAggressiveMonster
 {
 	typedef cAggressiveMonster super;
-	
+
 public:
 	cSpider(void);
 
 	CLASS_PROTODEF(cSpider)
 
 	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = nullptr) override;
-	virtual void EventSeePlayer(cEntity *) override;
+	virtual void EventSeePlayer(cEntity *, cChunk & a_Chunk) override;
 	virtual bool DoTakeDamage(TakeDamageInfo & a_TDI) override;
 } ;