1 files changed, 2124 insertions, 0 deletions

diff --git a/src/BlockArea.cpp b/src/BlockArea.cpp
new file mode 100644
index 000000000..5c15adfef
--- /dev/null
+++ b/src/BlockArea.cpp
@@ -0,0 +1,2124 @@
+
+// BlockArea.cpp
+
+// Implements the cBlockArea object representing an area of block data that can be queried from cWorld and then accessed again without further queries
+// The object also supports writing the blockdata back into cWorld, even into other coords
+
+#include "Globals.h"
+#include "BlockArea.h"
+#include "World.h"
+#include "OSSupport/GZipFile.h"
+#include "WorldStorage/FastNBT.h"
+#include "Blocks/BlockHandler.h"
+
+
+
+
+
+// This wild construct allows us to pass a function argument and still have it inlined by the compiler :)
+/// Merges two blocktypes and blockmetas of the specified sizes and offsets using the specified combinator function
+template<typename Combinator> void InternalMergeBlocks(
+	BLOCKTYPE * a_DstTypes, const BLOCKTYPE * a_SrcTypes,
+	NIBBLETYPE * a_DstMetas, const NIBBLETYPE * a_SrcMetas, 
+	int a_SizeX, int a_SizeY, int a_SizeZ,
+	int a_SrcOffX, int a_SrcOffY, int a_SrcOffZ,
+	int a_DstOffX, int a_DstOffY, int a_DstOffZ,
+	int a_SrcSizeX, int a_SrcSizeY, int a_SrcSizeZ,
+	int a_DstSizeX, int a_DstSizeY, int a_DstSizeZ,
+	Combinator a_Combinator
+)
+{
+	for (int y = 0; y < a_SizeY; y++)
+	{
+		int SrcBaseY = (y + a_SrcOffY) * a_SrcSizeX * a_SrcSizeZ;
+		int DstBaseY = (y + a_DstOffY) * a_DstSizeX * a_DstSizeZ;
+		for (int z = 0; z < a_SizeZ; z++)
+		{
+			int SrcBaseZ = SrcBaseY + (z + a_SrcOffZ) * a_SrcSizeX;
+			int DstBaseZ = DstBaseY + (z + a_DstOffZ) * a_DstSizeX;
+			int SrcIdx = SrcBaseZ + a_SrcOffX;
+			int DstIdx = DstBaseZ + a_DstOffX;
+			for (int x = 0; x < a_SizeX; x++)
+			{
+				a_Combinator(a_DstTypes[DstIdx], a_SrcTypes[SrcIdx], a_DstMetas[DstIdx], a_SrcMetas[SrcIdx]);
+				++DstIdx;
+				++SrcIdx;
+			}  // for x
+		}  // for z
+	}  // for y
+}
+
+
+
+
+
+/// Combinator used for cBlockArea::msOverwrite merging
+static void MergeCombinatorOverwrite(BLOCKTYPE & a_DstType, BLOCKTYPE a_SrcType, NIBBLETYPE & a_DstMeta, NIBBLETYPE a_SrcMeta)
+{
+	a_DstType = a_SrcType;
+	a_DstMeta = a_SrcMeta;
+}
+
+
+
+
+
+/// Combinator used for cBlockArea::msFillAir merging
+static void MergeCombinatorFillAir(BLOCKTYPE & a_DstType, BLOCKTYPE a_SrcType, NIBBLETYPE & a_DstMeta, NIBBLETYPE a_SrcMeta)
+{
+	if (a_DstType == E_BLOCK_AIR)
+	{
+		a_DstType = a_SrcType;
+		a_DstMeta = a_SrcMeta;
+	}
+	// "else" is the default, already in place
+}
+
+
+
+
+
+/// Combinator used for cBlockArea::msImprint merging
+static void MergeCombinatorImprint(BLOCKTYPE & a_DstType, BLOCKTYPE a_SrcType, NIBBLETYPE & a_DstMeta, NIBBLETYPE a_SrcMeta)
+{
+	if (a_SrcType != E_BLOCK_AIR)
+	{
+		a_DstType = a_SrcType;
+		a_DstMeta = a_SrcMeta;
+	}
+	// "else" is the default, already in place
+}
+
+
+
+
+
+/// Combinator used for cBlockArea::msLake merging
+static void MergeCombinatorLake(BLOCKTYPE & a_DstType, BLOCKTYPE a_SrcType, NIBBLETYPE & a_DstMeta, NIBBLETYPE a_SrcMeta)
+{
+	// Sponge is the NOP block
+	if (a_SrcType == E_BLOCK_SPONGE)
+	{
+		return;
+	}
+
+	// Air is always hollowed out	
+	if (a_SrcType == E_BLOCK_AIR)
+	{
+		a_DstType = E_BLOCK_AIR;
+		a_DstMeta = 0;
+		return;
+	}
+	
+	// Water and lava are never overwritten
+	switch (a_DstType)
+	{
+		case E_BLOCK_WATER:
+		case E_BLOCK_STATIONARY_WATER:
+		case E_BLOCK_LAVA:
+		case E_BLOCK_STATIONARY_LAVA:
+		{
+			return;
+		}
+	}
+	
+	// Water and lava always overwrite
+	switch (a_SrcType)
+	{
+		case E_BLOCK_WATER:
+		case E_BLOCK_STATIONARY_WATER:
+		case E_BLOCK_LAVA:
+		case E_BLOCK_STATIONARY_LAVA:
+		{
+			a_DstType = a_SrcType;
+			a_DstMeta = a_DstMeta;
+			return;
+		}
+	}
+	
+	if (a_SrcType == E_BLOCK_STONE)
+	{
+		switch (a_DstType)
+		{
+			case E_BLOCK_DIRT:
+			case E_BLOCK_GRASS:
+			case E_BLOCK_MYCELIUM:
+			{
+				a_DstType = E_BLOCK_STONE;
+				a_DstMeta = 0;
+				return;
+			}
+		}
+	}
+	// Everything else is left as it is
+}
+
+
+
+
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// cBlockArea:
+
+cBlockArea::cBlockArea(void) :
+	m_SizeX(0),
+	m_SizeY(0),
+	m_SizeZ(0),
+	m_BlockTypes(NULL),
+	m_BlockMetas(NULL),
+	m_BlockLight(NULL),
+	m_BlockSkyLight(NULL)
+{
+}
+
+
+
+
+
+cBlockArea::~cBlockArea()
+{
+	Clear();
+}
+
+
+
+
+
+void cBlockArea::Clear(void)
+{
+	delete[] m_BlockTypes;    m_BlockTypes = NULL;
+	delete[] m_BlockMetas;    m_BlockMetas = NULL;
+	delete[] m_BlockLight;    m_BlockLight = NULL;
+	delete[] m_BlockSkyLight; m_BlockSkyLight = NULL;
+	m_SizeX = 0;
+	m_SizeY = 0;
+	m_SizeZ = 0;
+}
+
+
+
+
+
+void cBlockArea::Create(int a_SizeX, int a_SizeY, int a_SizeZ, int a_DataTypes)
+{
+	Clear();
+	int BlockCount = a_SizeX * a_SizeY * a_SizeZ;
+	if ((a_DataTypes & baTypes) != 0)
+	{
+		m_BlockTypes = new BLOCKTYPE[BlockCount];
+		for (int i = 0; i < BlockCount; i++)
+		{
+			m_BlockTypes[i] = E_BLOCK_AIR;
+		}
+	}
+	if ((a_DataTypes & baMetas) != 0)
+	{
+		m_BlockMetas = new NIBBLETYPE[BlockCount];
+		for (int i = 0; i < BlockCount; i++)
+		{
+			m_BlockMetas[i] = 0;
+		}
+	}
+	if ((a_DataTypes & baLight) != 0)
+	{
+		m_BlockLight = new NIBBLETYPE[BlockCount];
+		for (int i = 0; i < BlockCount; i++)
+		{
+			m_BlockLight[i] = 0;
+		}
+	}
+	if ((a_DataTypes & baSkyLight) != 0)
+	{
+		m_BlockSkyLight = new NIBBLETYPE[BlockCount];
+		for (int i = 0; i < BlockCount; i++)
+		{
+			m_BlockSkyLight[i] = 0x0f;
+		}
+	}
+	m_SizeX = a_SizeX;
+	m_SizeY = a_SizeY;
+	m_SizeZ = a_SizeZ;
+	m_OriginX = 0;
+	m_OriginY = 0;
+	m_OriginZ = 0;
+}
+
+
+
+
+
+void cBlockArea::SetOrigin(int a_OriginX, int a_OriginY, int a_OriginZ)
+{
+	m_OriginX = a_OriginX;
+	m_OriginY = a_OriginY;
+	m_OriginZ = a_OriginZ;
+}
+
+
+
+
+
+bool cBlockArea::Read(cWorld * a_World, int a_MinBlockX, int a_MaxBlockX, int a_MinBlockY, int a_MaxBlockY, int a_MinBlockZ, int a_MaxBlockZ, int a_DataTypes)
+{
+	// Normalize the coords:
+	if (a_MinBlockX > a_MaxBlockX)
+	{
+		std::swap(a_MinBlockX, a_MaxBlockX);
+	}
+	if (a_MinBlockY > a_MaxBlockY)
+	{
+		std::swap(a_MinBlockY, a_MaxBlockY);
+	}
+	if (a_MinBlockZ > a_MaxBlockZ)
+	{
+		std::swap(a_MinBlockZ, a_MaxBlockZ);
+	}
+	
+	// Include the Max coords:
+	a_MaxBlockX += 1;
+	a_MaxBlockY += 1;
+	a_MaxBlockZ += 1;
+	
+	// Check coords validity:
+	if (a_MinBlockY < 0)
+	{
+		LOGWARNING("%s: MinBlockY less than zero, adjusting to zero", __FUNCTION__);
+		a_MinBlockY = 0;
+	}
+	else if (a_MinBlockY >= cChunkDef::Height)
+	{
+		LOGWARNING("%s: MinBlockY more than chunk height, adjusting to chunk height", __FUNCTION__);
+		a_MinBlockY = cChunkDef::Height - 1;
+	}
+	if (a_MaxBlockY < 0)
+	{
+		LOGWARNING("%s: MaxBlockY less than zero, adjusting to zero", __FUNCTION__);
+		a_MaxBlockY = 0;
+	}
+	else if (a_MaxBlockY >= cChunkDef::Height)
+	{
+		LOGWARNING("%s: MaxBlockY more than chunk height, adjusting to chunk height", __FUNCTION__);
+		a_MaxBlockY = cChunkDef::Height - 1;
+	}
+	
+	// Allocate the needed memory:
+	Clear();
+	if (!SetSize(a_MaxBlockX - a_MinBlockX, a_MaxBlockY - a_MinBlockY, a_MaxBlockZ - a_MinBlockZ, a_DataTypes))
+	{
+		return false;
+	}
+	m_OriginX = a_MinBlockX;
+	m_OriginY = a_MinBlockY;
+	m_OriginZ = a_MinBlockZ;
+	cChunkReader Reader(*this);
+	
+	// Convert block coords to chunks coords:
+	int MinChunkX, MaxChunkX;
+	int MinChunkZ, MaxChunkZ;
+	cChunkDef::AbsoluteToRelative(a_MinBlockX, a_MinBlockY, a_MinBlockZ, MinChunkX, MinChunkZ);
+	cChunkDef::AbsoluteToRelative(a_MaxBlockX, a_MaxBlockY, a_MaxBlockZ, MaxChunkX, MaxChunkZ);
+	
+	// Query block data:
+	if (!a_World->ForEachChunkInRect(MinChunkX, MaxChunkX, MinChunkZ, MaxChunkZ, Reader))
+	{
+		Clear();
+		return false;
+	}
+	
+	return true;
+}
+
+
+
+
+
+bool cBlockArea::Write(cWorld * a_World, int a_MinBlockX, int a_MinBlockY, int a_MinBlockZ, int a_DataTypes)
+{
+	ASSERT((a_DataTypes & GetDataTypes()) == a_DataTypes);  // Are you requesting only the data that I have?
+	a_DataTypes = a_DataTypes & GetDataTypes();  // For release builds, silently cut off the datatypes that I don't have
+
+	// Check coords validity:
+	if (a_MinBlockY < 0)
+	{
+		LOGWARNING("%s: MinBlockY less than zero, adjusting to zero", __FUNCTION__);
+		a_MinBlockY = 0;
+	}
+	else if (a_MinBlockY >= cChunkDef::Height - m_SizeY)
+	{
+		LOGWARNING("%s: MinBlockY + m_SizeY more than chunk height, adjusting to chunk height", __FUNCTION__);
+		a_MinBlockY = cChunkDef::Height - m_SizeY - 1;
+	}
+
+	return a_World->WriteBlockArea(*this, a_MinBlockX, a_MinBlockY, a_MinBlockZ, a_DataTypes);
+}
+
+
+
+
+
+void cBlockArea::CopyTo(cBlockArea & a_Into) const
+{
+	if (&a_Into == this)
+	{
+		LOGWARNING("Trying to copy a cBlockArea into self, ignoring.");
+		return;
+	}
+	
+	a_Into.Clear();
+	a_Into.SetSize(m_SizeX, m_SizeY, m_SizeZ, GetDataTypes());
+	a_Into.m_OriginX = m_OriginX;
+	a_Into.m_OriginY = m_OriginY;
+	a_Into.m_OriginZ = m_OriginZ;
+	int BlockCount = GetBlockCount();
+	if (HasBlockTypes())
+	{
+		memcpy(a_Into.m_BlockTypes, m_BlockTypes, BlockCount * sizeof(BLOCKTYPE));
+	}
+	if (HasBlockMetas())
+	{
+		memcpy(a_Into.m_BlockMetas, m_BlockMetas, BlockCount * sizeof(NIBBLETYPE));
+	}
+	if (HasBlockLights())
+	{
+		memcpy(a_Into.m_BlockLight, m_BlockLight, BlockCount * sizeof(NIBBLETYPE));
+	}
+	if (HasBlockSkyLights())
+	{
+		memcpy(a_Into.m_BlockSkyLight, m_BlockSkyLight, BlockCount * sizeof(NIBBLETYPE));
+	}
+}
+
+
+
+
+
+void cBlockArea::CopyFrom(const cBlockArea & a_From)
+{
+	a_From.CopyTo(*this);
+}
+
+
+
+
+
+void cBlockArea::DumpToRawFile(const AString & a_FileName)
+{
+	cFile f;
+	if (!f.Open(a_FileName, cFile::fmWrite))
+	{
+		LOGWARNING("cBlockArea: Cannot open file \"%s\" for raw dump", a_FileName.c_str());
+		return;
+	}
+	UInt32 SizeX = ntohl(m_SizeX);
+	UInt32 SizeY = ntohl(m_SizeY);
+	UInt32 SizeZ = ntohl(m_SizeZ);
+	f.Write(&SizeX, 4);
+	f.Write(&SizeY, 4);
+	f.Write(&SizeZ, 4);
+	unsigned char DataTypes = GetDataTypes();
+	f.Write(&DataTypes, 1);
+	int NumBlocks = GetBlockCount();
+	if (HasBlockTypes())
+	{
+		f.Write(m_BlockTypes, NumBlocks * sizeof(BLOCKTYPE));
+	}
+	if (HasBlockMetas())
+	{
+		f.Write(m_BlockMetas, NumBlocks);
+	}
+	if (HasBlockLights())
+	{
+		f.Write(m_BlockLight, NumBlocks);
+	}
+	if (HasBlockSkyLights())
+	{
+		f.Write(m_BlockSkyLight, NumBlocks);
+	}
+}
+
+
+
+
+
+bool cBlockArea::LoadFromSchematicFile(const AString & a_FileName)
+{
+	// Un-GZip the contents:
+	AString Contents;
+	cGZipFile File;
+	if (!File.Open(a_FileName, cGZipFile::fmRead))
+	{
+		LOG("Cannot open the schematic file \"%s\".", a_FileName.c_str());
+		return false;
+	}
+	int NumBytesRead = File.ReadRestOfFile(Contents);
+	if (NumBytesRead < 0)
+	{
+		LOG("Cannot read GZipped data in the schematic file \"%s\", error %d", a_FileName.c_str(), NumBytesRead);
+		return false;
+	}
+	File.Close();
+	
+	// Parse the NBT:
+	cParsedNBT NBT(Contents.data(), Contents.size());
+	if (!NBT.IsValid())
+	{
+		LOG("Cannot parse the NBT in the schematic file \"%s\".", a_FileName.c_str());
+		return false;
+	}
+	
+	return LoadFromSchematicNBT(NBT);
+}
+
+
+
+
+
+bool cBlockArea::SaveToSchematicFile(const AString & a_FileName)
+{
+	cFastNBTWriter Writer("Schematic");
+	Writer.AddShort("Width", m_SizeX);
+	Writer.AddShort("Height", m_SizeY);
+	Writer.AddShort("Length", m_SizeZ);
+	Writer.AddString("Materials", "Alpha");
+	if (HasBlockTypes())
+	{
+		Writer.AddByteArray("Blocks", (const char *)m_BlockTypes, GetBlockCount());
+	}
+	else
+	{
+		AString Dummy(GetBlockCount(), 0);
+		Writer.AddByteArray("Blocks", Dummy.data(), Dummy.size());
+	}
+	if (HasBlockMetas())
+	{
+		Writer.AddByteArray("Data", (const char *)m_BlockMetas, GetBlockCount());
+	}
+	else
+	{
+		AString Dummy(GetBlockCount(), 0);
+		Writer.AddByteArray("Data", Dummy.data(), Dummy.size());
+	}
+	// TODO: Save entities and block entities
+	Writer.BeginList("Entities", TAG_Compound);
+	Writer.EndList();
+	Writer.BeginList("TileEntities", TAG_Compound);
+	Writer.EndList();
+	Writer.Finish();
+	
+	// Save to file
+	cGZipFile File;
+	if (!File.Open(a_FileName, cGZipFile::fmWrite))
+	{
+		LOG("Cannot open file \"%s\" for writing.", a_FileName.c_str());
+		return false;
+	}
+	if (!File.Write(Writer.GetResult()))
+	{
+		LOG("Cannot write data to file \"%s\".", a_FileName.c_str());
+		return false;
+	}
+	return true;
+}
+
+
+
+
+
+void cBlockArea::Crop(int a_AddMinX, int a_SubMaxX, int a_AddMinY, int a_SubMaxY, int a_AddMinZ, int a_SubMaxZ)
+{
+	if (
+		(a_AddMinX + a_SubMaxX >= m_SizeX) ||
+		(a_AddMinY + a_SubMaxY >= m_SizeY) ||
+		(a_AddMinZ + a_SubMaxZ >= m_SizeZ)
+	)
+	{
+		LOGWARNING("cBlockArea:Crop called with more croping than the dimensions: %d x %d x %d with cropping %d, %d and %d",
+			m_SizeX, m_SizeY, m_SizeZ,
+			a_AddMinX + a_SubMaxX, a_AddMinY + a_SubMaxY, a_AddMinZ + a_SubMaxZ
+		);
+		return;
+	}
+	
+	if (HasBlockTypes())
+	{
+		CropBlockTypes(a_AddMinX, a_SubMaxX, a_AddMinY, a_SubMaxY, a_AddMinZ, a_SubMaxZ);
+	}
+	if (HasBlockMetas())
+	{
+		CropNibbles(m_BlockMetas, a_AddMinX, a_SubMaxX, a_AddMinY, a_SubMaxY, a_AddMinZ, a_SubMaxZ);
+	}
+	if (HasBlockLights())
+	{
+		CropNibbles(m_BlockLight, a_AddMinX, a_SubMaxX, a_AddMinY, a_SubMaxY, a_AddMinZ, a_SubMaxZ);
+	}
+	if (HasBlockSkyLights())
+	{
+		CropNibbles(m_BlockSkyLight, a_AddMinX, a_SubMaxX, a_AddMinY, a_SubMaxY, a_AddMinZ, a_SubMaxZ);
+	}
+	m_OriginX += a_AddMinX;
+	m_OriginY += a_AddMinY;
+	m_OriginZ += a_AddMinZ;
+	m_SizeX -= a_AddMinX + a_SubMaxX;
+	m_SizeY -= a_AddMinY + a_SubMaxY;
+	m_SizeZ -= a_AddMinZ + a_SubMaxZ;
+}
+
+
+
+
+
+void cBlockArea::Expand(int a_SubMinX, int a_AddMaxX, int a_SubMinY, int a_AddMaxY, int a_SubMinZ, int a_AddMaxZ)
+{
+	if (HasBlockTypes())
+	{
+		ExpandBlockTypes(a_SubMinX, a_AddMaxX, a_SubMinY, a_AddMaxY, a_SubMinZ, a_AddMaxZ);
+	}
+	if (HasBlockMetas())
+	{
+		ExpandNibbles(m_BlockMetas, a_SubMinX, a_AddMaxX, a_SubMinY, a_AddMaxY, a_SubMinZ, a_AddMaxZ);
+	}
+	if (HasBlockLights())
+	{
+		ExpandNibbles(m_BlockLight, a_SubMinX, a_AddMaxX, a_SubMinY, a_AddMaxY, a_SubMinZ, a_AddMaxZ);
+	}
+	if (HasBlockSkyLights())
+	{
+		ExpandNibbles(m_BlockSkyLight, a_SubMinX, a_AddMaxX, a_SubMinY, a_AddMaxY, a_SubMinZ, a_AddMaxZ);
+	}
+	m_OriginX -= a_SubMinX;
+	m_OriginY -= a_SubMinY;
+	m_OriginZ -= a_SubMinZ;
+	m_SizeX += a_SubMinX + a_AddMaxX;
+	m_SizeY += a_SubMinY + a_AddMaxY;
+	m_SizeZ += a_SubMinZ + a_AddMaxZ;
+}
+
+
+
+
+
+void cBlockArea::Merge(const cBlockArea & a_Src, int a_RelX, int a_RelY, int a_RelZ, eMergeStrategy a_Strategy)
+{
+	// Block types are compulsory, block metas are voluntary
+	if (!HasBlockTypes() || !a_Src.HasBlockTypes())
+	{
+		LOGWARNING("%s: cannot merge because one of the areas doesn't have blocktypes.", __FUNCTION__);
+		return;
+	}
+	
+	// Dst is *this, Src is a_Src
+	int SrcOffX = std::max(0, -a_RelX);  // Offset in Src where to start reading
+	int DstOffX = std::max(0,  a_RelX);  // Offset in Dst where to start writing
+	int SizeX   = std::min(a_Src.GetSizeX() - SrcOffX, GetSizeX() - DstOffX);  // How many blocks to copy
+
+	int SrcOffY = std::max(0, -a_RelY);  // Offset in Src where to start reading
+	int DstOffY = std::max(0,  a_RelY);  // Offset in Dst where to start writing
+	int SizeY   = std::min(a_Src.GetSizeY() - SrcOffY, GetSizeY() - DstOffY);  // How many blocks to copy
+
+	int SrcOffZ = std::max(0, -a_RelZ);  // Offset in Src where to start reading
+	int DstOffZ = std::max(0,  a_RelZ);  // Offset in Dst where to start writing
+	int SizeZ   = std::min(a_Src.GetSizeZ() - SrcOffZ, GetSizeZ() - DstOffZ);  // How many blocks to copy
+
+	const NIBBLETYPE * SrcMetas = a_Src.GetBlockMetas();
+	NIBBLETYPE * DstMetas = m_BlockMetas;
+	bool IsDummyMetas = ((SrcMetas == NULL) || (DstMetas == NULL));
+	
+	if (IsDummyMetas)
+	{
+		SrcMetas = new NIBBLETYPE[a_Src.GetBlockCount()];
+		DstMetas = new NIBBLETYPE[GetBlockCount()];
+	}
+	
+	switch (a_Strategy)
+	{
+		case msOverwrite:
+		{
+			InternalMergeBlocks(
+				m_BlockTypes, a_Src.GetBlockTypes(),
+				DstMetas, SrcMetas,
+				SizeX, SizeY, SizeZ,
+				SrcOffX, SrcOffY, SrcOffZ,
+				DstOffX, DstOffY, DstOffZ,
+				a_Src.GetSizeX(), a_Src.GetSizeY(), a_Src.GetSizeZ(),
+				m_SizeX, m_SizeY, m_SizeZ,
+				MergeCombinatorOverwrite
+			);
+			break;
+		}  // case msOverwrite
+		
+		case msFillAir:
+		{
+			InternalMergeBlocks(
+				m_BlockTypes, a_Src.GetBlockTypes(),
+				DstMetas, SrcMetas,
+				SizeX, SizeY, SizeZ,
+				SrcOffX, SrcOffY, SrcOffZ,
+				DstOffX, DstOffY, DstOffZ,
+				a_Src.GetSizeX(), a_Src.GetSizeY(), a_Src.GetSizeZ(),
+				m_SizeX, m_SizeY, m_SizeZ,
+				MergeCombinatorFillAir
+			);
+			break;
+		}  // case msFillAir
+		
+		case msImprint:
+		{
+			InternalMergeBlocks(
+				m_BlockTypes, a_Src.GetBlockTypes(),
+				DstMetas, SrcMetas,
+				SizeX, SizeY, SizeZ,
+				SrcOffX, SrcOffY, SrcOffZ,
+				DstOffX, DstOffY, DstOffZ,
+				a_Src.GetSizeX(), a_Src.GetSizeY(), a_Src.GetSizeZ(),
+				m_SizeX, m_SizeY, m_SizeZ,
+				MergeCombinatorImprint
+			);
+			break;
+		}  // case msImprint
+		
+		case msLake:
+		{
+			InternalMergeBlocks(
+				m_BlockTypes, a_Src.GetBlockTypes(),
+				DstMetas, SrcMetas,
+				SizeX, SizeY, SizeZ,
+				SrcOffX, SrcOffY, SrcOffZ,
+				DstOffX, DstOffY, DstOffZ,
+				a_Src.GetSizeX(), a_Src.GetSizeY(), a_Src.GetSizeZ(),
+				m_SizeX, m_SizeY, m_SizeZ,
+				MergeCombinatorLake
+			);
+			break;
+		}  // case msLake
+		
+		default:
+		{
+			LOGWARNING("Unknown block area merge strategy: %d", a_Strategy);
+			ASSERT(!"Unknown block area merge strategy");
+			break;
+		}
+	}  // switch (a_Strategy)
+	
+	if (IsDummyMetas)
+	{
+		delete[] SrcMetas;
+		delete[] DstMetas;
+	}
+}
+
+
+
+
+
+void cBlockArea::Fill(int a_DataTypes, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta, NIBBLETYPE a_BlockLight, NIBBLETYPE a_BlockSkyLight)
+{
+	if ((a_DataTypes & GetDataTypes()) != a_DataTypes)
+	{
+		LOGWARNING("%s: requested datatypes that are not present in the BlockArea object, trimming those away (req 0x%x, stor 0x%x)",
+			__FUNCTION__, a_DataTypes, GetDataTypes()
+		);
+		a_DataTypes = a_DataTypes & GetDataTypes();
+	}
+	
+	int BlockCount = GetBlockCount();
+	if ((a_DataTypes & baTypes) != 0)
+	{
+		for (int i = 0; i < BlockCount; i++)
+		{
+			m_BlockTypes[i] = a_BlockType;
+		}
+	}
+	if ((a_DataTypes & baMetas) != 0)
+	{
+		for (int i = 0; i < BlockCount; i++)
+		{
+			m_BlockMetas[i] = a_BlockMeta;
+		}
+	}
+	if ((a_DataTypes & baLight) != 0)
+	{
+		for (int i = 0; i < BlockCount; i++)
+		{
+			m_BlockLight[i] = a_BlockLight;
+		}
+	}
+	if ((a_DataTypes & baSkyLight) != 0)
+	{
+		for (int i = 0; i < BlockCount; i++)
+		{
+			m_BlockSkyLight[i] = a_BlockSkyLight;
+		}
+	}
+}
+
+
+
+
+
+void cBlockArea::FillRelCuboid(int a_MinRelX, int a_MaxRelX, int a_MinRelY, int a_MaxRelY, int a_MinRelZ, int a_MaxRelZ, 
+	int a_DataTypes, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta,
+	NIBBLETYPE a_BlockLight, NIBBLETYPE a_BlockSkyLight
+)
+{
+	if ((a_DataTypes & GetDataTypes()) != a_DataTypes)
+	{
+		LOGWARNING("%s: requested datatypes that are not present in the BlockArea object, trimming those away (req 0x%x, stor 0x%x)",
+			__FUNCTION__, a_DataTypes, GetDataTypes()
+		);
+		a_DataTypes = a_DataTypes & GetDataTypes();
+	}
+	
+	if ((a_DataTypes & baTypes) != 0)
+	{
+		for (int y = a_MinRelY; y <= a_MaxRelY; y++) for (int z = a_MinRelZ; z <= a_MaxRelZ; z++) for (int x = a_MinRelX; x <= a_MaxRelX; x++)
+		{
+			m_BlockTypes[MakeIndex(x, y, z)] = a_BlockType;
+		}  // for x, z, y
+	}
+	if ((a_DataTypes & baMetas) != 0)
+	{
+		for (int y = a_MinRelY; y <= a_MaxRelY; y++) for (int z = a_MinRelZ; z <= a_MaxRelZ; z++) for (int x = a_MinRelX; x <= a_MaxRelX; x++)
+		{
+			m_BlockMetas[MakeIndex(x, y, z)] = a_BlockMeta;
+		}  // for x, z, y
+	}
+	if ((a_DataTypes & baLight) != 0)
+	{
+		for (int y = a_MinRelY; y <= a_MaxRelY; y++) for (int z = a_MinRelZ; z <= a_MaxRelZ; z++) for (int x = a_MinRelX; x <= a_MaxRelX; x++)
+		{
+			m_BlockLight[MakeIndex(x, y, z)] = a_BlockLight;
+		}  // for x, z, y
+	}
+	if ((a_DataTypes & baSkyLight) != 0)
+	{
+		for (int y = a_MinRelY; y <= a_MaxRelY; y++) for (int z = a_MinRelZ; z <= a_MaxRelZ; z++) for (int x = a_MinRelX; x <= a_MaxRelX; x++)
+		{
+			m_BlockSkyLight[MakeIndex(x, y, z)] = a_BlockSkyLight;
+		}  // for x, z, y
+	}
+}
+
+
+
+
+
+void cBlockArea::RelLine(int a_RelX1, int a_RelY1, int a_RelZ1, int a_RelX2, int a_RelY2, int a_RelZ2,
+	int a_DataTypes, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta,
+	NIBBLETYPE a_BlockLight, NIBBLETYPE a_BlockSkyLight
+)
+{
+	// Bresenham-3D algorithm for drawing lines:
+	int dx = abs(a_RelX2 - a_RelX1);
+	int dy = abs(a_RelY2 - a_RelY1);
+	int dz = abs(a_RelZ2 - a_RelZ1);
+	int sx = (a_RelX1 < a_RelX2) ? 1 : -1;
+	int sy = (a_RelY1 < a_RelY2) ? 1 : -1;
+	int sz = (a_RelZ1 < a_RelZ2) ? 1 : -1;
+	int err = dx - dz;
+
+	if (dx >= std::max(dy, dz))  // x dominant
+	{
+		int yd = dy - dx / 2;
+		int zd = dz - dx / 2;
+
+		while (true)
+		{
+			RelSetData(a_RelX1, a_RelY1, a_RelZ1, a_DataTypes, a_BlockType, a_BlockMeta, a_BlockLight, a_BlockSkyLight);
+
+			if (a_RelX1 == a_RelX2)
+			{
+				break;
+			}
+
+			if (yd >= 0)  // move along y
+			{
+				a_RelY1 += sy;
+				yd -= dx;
+			}
+
+			if (zd >= 0)  // move along z
+			{
+				a_RelZ1 += sz;
+				zd -= dx;
+			}
+
+			// move along x
+			a_RelX1  += sx;
+			yd += dy;
+			zd += dz;
+		}
+	}
+	else if (dy >= std::max(dx, dz))  // y dominant
+	{
+		int xd = dx - dy / 2;
+		int zd = dz - dy / 2;
+
+		while (true)
+		{
+			RelSetData(a_RelX1, a_RelY1, a_RelZ1, a_DataTypes, a_BlockType, a_BlockMeta, a_BlockLight, a_BlockSkyLight);
+
+			if (a_RelY1 == a_RelY2)
+			{
+				break;
+			}
+
+			if (xd >= 0)  // move along x
+			{
+				a_RelX1 += sx;
+				xd -= dy;
+			}
+
+			if (zd >= 0)  // move along z
+			{
+				a_RelZ1 += sz;
+				zd -= dy;
+			}
+
+			// move along y
+			a_RelY1 += sy;
+			xd += dx;
+			zd += dz;
+		}
+	}
+	else
+	{
+		// z dominant
+		ASSERT(dz >= std::max(dx, dy));
+		int xd = dx - dz / 2;
+		int yd = dy - dz / 2;
+
+		while (true)
+		{
+			RelSetData(a_RelX1, a_RelY1, a_RelZ1, a_DataTypes, a_BlockType, a_BlockMeta, a_BlockLight, a_BlockSkyLight);
+
+			if (a_RelZ1 == a_RelZ2)
+			{
+				break;
+			}
+
+			if (xd >= 0)  // move along x
+			{
+				a_RelX1 += sx;
+				xd -= dz;
+			}
+
+			if (yd >= 0)  // move along y
+			{
+				a_RelY1 += sy;
+				yd -= dz;
+			}
+			
+			// move along z
+			a_RelZ1 += sz;
+			xd += dx;
+			yd += dy;
+		}
+	}  // if (which dimension is dominant)
+}
+
+
+
+
+
+void cBlockArea::RotateCCW(void)
+{
+	if (!HasBlockTypes())
+	{
+		LOGWARNING("cBlockArea: Cannot rotate blockmeta without blocktypes!");
+		return;
+	}
+	
+	if (!HasBlockMetas())
+	{
+		// There are no blockmetas to rotate, just use the NoMeta function
+		RotateCCWNoMeta();
+		return;
+	}
+	
+	// We are guaranteed that both blocktypes and blockmetas exist; rotate both at the same time:
+	BLOCKTYPE * NewTypes = new BLOCKTYPE[m_SizeX * m_SizeY * m_SizeZ];
+	NIBBLETYPE * NewMetas = new NIBBLETYPE[m_SizeX * m_SizeY * m_SizeZ];
+	for (int x = 0; x < m_SizeX; x++)
+	{
+		int NewZ = m_SizeX - x - 1;
+		for (int z = 0; z < m_SizeZ; z++)
+		{
+			int NewX = z;
+			for (int y = 0; y < m_SizeY; y++)
+			{
+				int NewIdx = NewX + NewZ * m_SizeX + y * m_SizeX * m_SizeZ;
+				int OldIdx = MakeIndex(x, y, z);
+				NewTypes[NewIdx] = m_BlockTypes[OldIdx];
+				NewMetas[NewIdx] = BlockHandler(m_BlockTypes[OldIdx])->MetaRotateCCW(m_BlockMetas[OldIdx]);
+			}  // for y
+		}  // for z
+	}  // for x
+	std::swap(m_BlockTypes, NewTypes);
+	std::swap(m_BlockMetas, NewMetas);
+	delete[] NewTypes;
+	delete[] NewMetas;
+
+	std::swap(m_SizeX, m_SizeZ);
+}
+
+
+
+
+
+void cBlockArea::RotateCW(void)
+{
+	if (!HasBlockTypes())
+	{
+		LOGWARNING("cBlockArea: Cannot rotate blockmeta without blocktypes!");
+		return;
+	}
+
+	if (!HasBlockMetas())
+	{
+		// There are no blockmetas to rotate, just use the NoMeta function
+		RotateCWNoMeta();
+		return;
+	}
+	
+	// We are guaranteed that both blocktypes and blockmetas exist; rotate both at the same time:
+	BLOCKTYPE * NewTypes = new BLOCKTYPE[m_SizeX * m_SizeY * m_SizeZ];
+	NIBBLETYPE * NewMetas = new NIBBLETYPE[m_SizeX * m_SizeY * m_SizeZ];
+	for (int x = 0; x < m_SizeX; x++)
+	{
+		int NewZ = x;
+		for (int z = 0; z < m_SizeZ; z++)
+		{
+			int NewX = m_SizeZ - z - 1;
+			for (int y = 0; y < m_SizeY; y++)
+			{
+				int NewIdx = NewX + NewZ * m_SizeX + y * m_SizeX * m_SizeZ;
+				int OldIdx = MakeIndex(x, y, z);
+				NewTypes[NewIdx] = m_BlockTypes[OldIdx];
+				NewMetas[NewIdx] = BlockHandler(m_BlockTypes[OldIdx])->MetaRotateCW(m_BlockMetas[OldIdx]);
+			}  // for y
+		}  // for z
+	}  // for x
+	std::swap(m_BlockTypes, NewTypes);
+	std::swap(m_BlockMetas, NewMetas);
+	delete[] NewTypes;
+	delete[] NewMetas;
+
+	std::swap(m_SizeX, m_SizeZ);
+}
+
+
+
+
+
+void cBlockArea::MirrorXY(void)
+{
+	if (!HasBlockTypes())
+	{
+		LOGWARNING("cBlockArea: Cannot mirror meta without blocktypes!");
+		return;
+	}
+	
+	if (!HasBlockMetas())
+	{
+		// There are no blockmetas to mirror, just use the NoMeta function
+		MirrorXYNoMeta();
+		return;
+	}
+
+	// We are guaranteed that both blocktypes and blockmetas exist; mirror both at the same time:
+	int HalfZ = m_SizeZ / 2;
+	int MaxZ = m_SizeZ - 1;
+	for (int y = 0; y < m_SizeY; y++)
+	{
+		for (int z = 0; z < HalfZ; z++)
+		{
+			for (int x = 0; x < m_SizeX; x++)
+			{
+				int Idx1 = MakeIndex(x, y, z);
+				int Idx2 = MakeIndex(x, y, MaxZ - z);
+				std::swap(m_BlockTypes[Idx1], m_BlockTypes[Idx2]);
+				NIBBLETYPE Meta1 = BlockHandler(m_BlockTypes[Idx2])->MetaMirrorXY(m_BlockMetas[Idx1]);
+				NIBBLETYPE Meta2 = BlockHandler(m_BlockTypes[Idx1])->MetaMirrorXY(m_BlockMetas[Idx2]);
+				m_BlockMetas[Idx1] = Meta2;
+				m_BlockMetas[Idx2] = Meta1;
+			}  // for x
+		}  // for z
+	}  // for y
+}
+
+
+
+
+
+void cBlockArea::MirrorXZ(void)
+{
+	if (!HasBlockTypes())
+	{
+		LOGWARNING("cBlockArea: Cannot mirror meta without blocktypes!");
+		return;
+	}
+
+	if (!HasBlockMetas())
+	{
+		// There are no blockmetas to mirror, just use the NoMeta function
+		MirrorXZNoMeta();
+		return;
+	}
+
+	// We are guaranteed that both blocktypes and blockmetas exist; mirror both at the same time:
+	int HalfY = m_SizeY / 2;
+	int MaxY = m_SizeY - 1;
+	for (int y = 0; y < HalfY; y++)
+	{
+		for (int z = 0; z < m_SizeZ; z++)
+		{
+			for (int x = 0; x < m_SizeX; x++)
+			{
+				int Idx1 = MakeIndex(x, y, z);
+				int Idx2 = MakeIndex(x, MaxY - y, z);
+				std::swap(m_BlockTypes[Idx1], m_BlockTypes[Idx2]);
+				NIBBLETYPE Meta1 = BlockHandler(m_BlockTypes[Idx2])->MetaMirrorXZ(m_BlockMetas[Idx1]);
+				NIBBLETYPE Meta2 = BlockHandler(m_BlockTypes[Idx1])->MetaMirrorXZ(m_BlockMetas[Idx2]);
+				m_BlockMetas[Idx1] = Meta2;
+				m_BlockMetas[Idx2] = Meta1;
+			}  // for x
+		}  // for z
+	}  // for y
+}
+
+
+
+
+
+void cBlockArea::MirrorYZ(void)
+{
+	if (!HasBlockTypes())
+	{
+		LOGWARNING("cBlockArea: Cannot mirror meta without blocktypes!");
+		return;
+	}
+
+	if (!HasBlockMetas())
+	{
+		// There are no blockmetas to mirror, just use the NoMeta function
+		MirrorYZNoMeta();
+		return;
+	}
+
+	// We are guaranteed that both blocktypes and blockmetas exist; mirror both at the same time:
+	int HalfX = m_SizeX / 2;
+	int MaxX = m_SizeX - 1;
+	for (int y = 0; y < m_SizeY; y++)
+	{
+		for (int z = 0; z < m_SizeZ; z++)
+		{
+			for (int x = 0; x < HalfX; x++)
+			{
+				int Idx1 = MakeIndex(x, y, z);
+				int Idx2 = MakeIndex(MaxX - x, y, z);
+				std::swap(m_BlockTypes[Idx1], m_BlockTypes[Idx2]);
+				NIBBLETYPE Meta1 = BlockHandler(m_BlockTypes[Idx2])->MetaMirrorYZ(m_BlockMetas[Idx1]);
+				NIBBLETYPE Meta2 = BlockHandler(m_BlockTypes[Idx1])->MetaMirrorYZ(m_BlockMetas[Idx2]);
+				m_BlockMetas[Idx1] = Meta2;
+				m_BlockMetas[Idx2] = Meta1;
+			}  // for x
+		}  // for z
+	}  // for y
+}
+
+
+
+
+
+void cBlockArea::RotateCCWNoMeta(void)
+{
+	if (HasBlockTypes())
+	{
+		BLOCKTYPE * NewTypes = new BLOCKTYPE[m_SizeX * m_SizeY * m_SizeZ];
+		for (int x = 0; x < m_SizeX; x++)
+		{
+			int NewZ = m_SizeX - x - 1;
+			for (int z = 0; z < m_SizeZ; z++)
+			{
+				int NewX = z;
+				for (int y = 0; y < m_SizeY; y++)
+				{
+					NewTypes[NewX + NewZ * m_SizeX + y * m_SizeX * m_SizeZ] = m_BlockTypes[MakeIndex(x, y, z)];
+				}  // for y
+			}  // for z
+		}  // for x
+		std::swap(m_BlockTypes, NewTypes);
+		delete[] NewTypes;
+	}
+	if (HasBlockMetas())
+	{
+		NIBBLETYPE * NewMetas = new NIBBLETYPE[m_SizeX * m_SizeY * m_SizeZ];
+		for (int x = 0; x < m_SizeX; x++)
+		{
+			int NewZ = m_SizeX - x - 1;
+			for (int z = 0; z < m_SizeZ; z++)
+			{
+				int NewX = z;
+				for (int y = 0; y < m_SizeY; y++)
+				{
+					NewMetas[NewX + NewZ * m_SizeX + y * m_SizeX * m_SizeZ] = m_BlockMetas[MakeIndex(x, y, z)];
+				}  // for y
+			}  // for z
+		}  // for x
+		std::swap(m_BlockMetas, NewMetas);
+		delete[] NewMetas;
+	}
+	std::swap(m_SizeX, m_SizeZ);
+}
+
+
+
+
+
+void cBlockArea::RotateCWNoMeta(void)
+{
+	if (HasBlockTypes())
+	{
+		BLOCKTYPE * NewTypes = new BLOCKTYPE[m_SizeX * m_SizeY * m_SizeZ];
+		for (int z = 0; z < m_SizeZ; z++)
+		{
+			int NewX = m_SizeZ - z - 1;
+			for (int x = 0; x < m_SizeX; x++)
+			{
+				int NewZ = x;
+				for (int y = 0; y < m_SizeY; y++)
+				{
+					NewTypes[NewX + NewZ * m_SizeX + y * m_SizeX * m_SizeZ] = m_BlockTypes[MakeIndex(x, y, z)];
+				}  // for y
+			}  // for x
+		}  // for z
+		std::swap(m_BlockTypes, NewTypes);
+		delete[] NewTypes;
+	}
+	if (HasBlockMetas())
+	{
+		NIBBLETYPE * NewMetas = new NIBBLETYPE[m_SizeX * m_SizeY * m_SizeZ];
+		for (int z = 0; z < m_SizeZ; z++)
+		{
+			int NewX = m_SizeZ - z - 1;
+			for (int x = 0; x < m_SizeX; x++)
+			{
+				int NewZ = x;
+				for (int y = 0; y < m_SizeY; y++)
+				{
+					NewMetas[NewX + NewZ * m_SizeX + y * m_SizeX * m_SizeZ] = m_BlockMetas[MakeIndex(x, y, z)];
+				}  // for y
+			}  // for x
+		}  // for z
+		std::swap(m_BlockMetas, NewMetas);
+		delete[] NewMetas;
+	}
+	std::swap(m_SizeX, m_SizeZ);
+}
+
+
+
+
+
+void cBlockArea::MirrorXYNoMeta(void)
+{
+	int HalfZ = m_SizeZ / 2;
+	int MaxZ = m_SizeZ - 1;
+	if (HasBlockTypes())
+	{
+		for (int y = 0; y < m_SizeY; y++)
+		{
+			for (int z = 0; z < HalfZ; z++)
+			{
+				for (int x = 0; x < m_SizeX; x++)
+				{
+					std::swap(m_BlockTypes[MakeIndex(x, y, z)], m_BlockTypes[MakeIndex(x, y, MaxZ - z)]);
+				}  // for x
+			}  // for z
+		}  // for y
+	}  // if (HasBlockTypes)
+	
+	if (HasBlockMetas())
+	{
+		for (int y = 0; y < m_SizeY; y++)
+		{
+			for (int z = 0; z < HalfZ; z++)
+			{
+				for (int x = 0; x < m_SizeX; x++)
+				{
+					std::swap(m_BlockMetas[MakeIndex(x, y, z)], m_BlockMetas[MakeIndex(x, y, MaxZ - z)]);
+				}  // for x
+			}  // for z
+		}  // for y
+	}  // if (HasBlockMetas)
+}
+
+
+
+
+
+void cBlockArea::MirrorXZNoMeta(void)
+{
+	int HalfY = m_SizeY / 2;
+	int MaxY = m_SizeY - 1;
+	if (HasBlockTypes())
+	{
+		for (int y = 0; y < HalfY; y++)
+		{
+			for (int z = 0; z < m_SizeZ; z++)
+			{
+				for (int x = 0; x < m_SizeX; x++)
+				{
+					std::swap(m_BlockTypes[MakeIndex(x, y, z)], m_BlockTypes[MakeIndex(x, MaxY - y, z)]);
+				}  // for x
+			}  // for z
+		}  // for y
+	}  // if (HasBlockTypes)
+	
+	if (HasBlockMetas())
+	{
+		for (int y = 0; y < HalfY; y++)
+		{
+			for (int z = 0; z < m_SizeZ; z++)
+			{
+				for (int x = 0; x < m_SizeX; x++)
+				{
+					std::swap(m_BlockMetas[MakeIndex(x, y, z)], m_BlockMetas[MakeIndex(x, MaxY - y, z)]);
+				}  // for x
+			}  // for z
+		}  // for y
+	}  // if (HasBlockMetas)
+}
+
+
+
+
+
+void cBlockArea::MirrorYZNoMeta(void)
+{
+	int HalfX = m_SizeX / 2;
+	int MaxX = m_SizeX - 1;
+	if (HasBlockTypes())
+	{
+		for (int y = 0; y < m_SizeY; y++)
+		{
+			for (int z = 0; z < m_SizeZ; z++)
+			{
+				for (int x = 0; x < HalfX; x++)
+				{
+					std::swap(m_BlockTypes[MakeIndex(x, y, z)], m_BlockTypes[MakeIndex(MaxX - x, y, z)]);
+				}  // for x
+			}  // for z
+		}  // for y
+	}  // if (HasBlockTypes)
+	
+	if (HasBlockMetas())
+	{
+		for (int y = 0; y < m_SizeY; y++)
+		{
+			for (int z = 0; z < m_SizeZ; z++)
+			{
+				for (int x = 0; x < HalfX; x++)
+				{
+					std::swap(m_BlockMetas[MakeIndex(x, y, z)], m_BlockMetas[MakeIndex(MaxX - x, y, z)]);
+				}  // for x
+			}  // for z
+		}  // for y
+	}  // if (HasBlockMetas)
+}
+
+
+
+
+
+void cBlockArea::SetRelBlockType(int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE a_BlockType)
+{
+	if (m_BlockTypes == NULL)
+	{
+		LOGWARNING("cBlockArea: BlockTypes have not been read!");
+		return;
+	}
+	m_BlockTypes[MakeIndex(a_RelX, a_RelY, a_RelZ)] = a_BlockType;
+}
+
+
+
+
+
+void cBlockArea::SetBlockType(int a_BlockX, int a_BlockY, int a_BlockZ, BLOCKTYPE a_BlockType)
+{
+	SetRelBlockType(a_BlockX - m_OriginX, a_BlockY - m_OriginY, a_BlockZ - m_OriginZ, a_BlockType);
+}
+
+
+
+
+
+void cBlockArea::SetRelBlockMeta(int a_RelX, int a_RelY, int a_RelZ, NIBBLETYPE a_BlockMeta)
+{
+	SetRelNibble(a_RelX, a_RelY, a_RelZ, a_BlockMeta, m_BlockMetas);
+}
+
+
+
+
+
+void cBlockArea::SetBlockMeta(int a_BlockX, int a_BlockY, int a_BlockZ, NIBBLETYPE a_BlockMeta)
+{
+	SetNibble(a_BlockX, a_BlockY, a_BlockZ, a_BlockMeta, m_BlockMetas);
+}
+
+
+
+
+
+void cBlockArea::SetRelBlockLight(int a_RelX, int a_RelY, int a_RelZ, NIBBLETYPE a_BlockLight)
+{
+	SetRelNibble(a_RelX, a_RelY, a_RelZ, a_BlockLight, m_BlockLight);
+}
+
+
+
+
+
+void cBlockArea::SetBlockLight(int a_BlockX, int a_BlockY, int a_BlockZ, NIBBLETYPE a_BlockLight)
+{
+	SetNibble(a_BlockX, a_BlockY, a_BlockZ, a_BlockLight, m_BlockLight);
+}
+
+
+
+
+
+void cBlockArea::SetRelBlockSkyLight(int a_RelX, int a_RelY, int a_RelZ, NIBBLETYPE a_BlockSkyLight)
+{
+	SetRelNibble(a_RelX, a_RelY, a_RelZ, a_BlockSkyLight, m_BlockSkyLight);
+}
+
+
+
+
+
+void cBlockArea::SetBlockSkyLight(int a_BlockX, int a_BlockY, int a_BlockZ, NIBBLETYPE a_BlockSkyLight)
+{
+	SetNibble(a_BlockX, a_BlockY, a_BlockZ, a_BlockSkyLight, m_BlockSkyLight);
+}
+
+
+
+
+
+BLOCKTYPE cBlockArea::GetRelBlockType(int a_RelX, int a_RelY, int a_RelZ) const
+{
+	if (m_BlockTypes == NULL)
+	{
+		LOGWARNING("cBlockArea: BlockTypes have not been read!");
+		return E_BLOCK_AIR;
+	}
+	return m_BlockTypes[MakeIndex(a_RelX, a_RelY, a_RelZ)];
+}
+
+
+
+
+
+BLOCKTYPE cBlockArea::GetBlockType(int a_BlockX, int a_BlockY, int a_BlockZ) const
+{
+	return GetRelBlockType(a_BlockX - m_OriginX, a_BlockY - m_OriginY, a_BlockZ - m_OriginZ);
+}
+
+
+
+
+
+NIBBLETYPE cBlockArea::GetRelBlockMeta(int a_RelX, int a_RelY, int a_RelZ) const
+{
+	return GetRelNibble(a_RelX, a_RelY, a_RelZ, m_BlockMetas);
+}
+
+
+
+
+
+NIBBLETYPE cBlockArea::GetBlockMeta(int a_BlockX, int a_BlockY, int a_BlockZ) const
+{
+	return GetNibble(a_BlockX, a_BlockY, a_BlockZ, m_BlockMetas);
+}
+
+
+
+
+
+NIBBLETYPE cBlockArea::GetRelBlockLight(int a_RelX, int a_RelY, int a_RelZ) const
+{
+	return GetRelNibble(a_RelX, a_RelY, a_RelZ, m_BlockLight);
+}
+
+
+
+
+
+NIBBLETYPE cBlockArea::GetBlockLight(int a_BlockX, int a_BlockY, int a_BlockZ) const
+{
+	return GetNibble(a_BlockX, a_BlockY, a_BlockZ, m_BlockLight);
+}
+
+
+
+
+
+NIBBLETYPE cBlockArea::GetRelBlockSkyLight(int a_RelX, int a_RelY, int a_RelZ) const
+{
+	return GetRelNibble(a_RelX, a_RelY, a_RelZ, m_BlockSkyLight);
+}
+
+
+
+
+
+NIBBLETYPE cBlockArea::GetBlockSkyLight(int a_BlockX, int a_BlockY, int a_BlockZ) const
+{
+	return GetNibble(a_BlockX, a_BlockY, a_BlockZ, m_BlockSkyLight);
+}
+
+
+
+
+
+void cBlockArea::SetBlockTypeMeta(int a_BlockX, int a_BlockY, int a_BlockZ, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta)
+{
+	SetRelBlockTypeMeta(a_BlockX - m_OriginX, a_BlockY - m_OriginY, a_BlockZ - m_OriginZ, a_BlockType, a_BlockMeta);
+}
+
+
+
+
+
+void cBlockArea::SetRelBlockTypeMeta(int a_RelX,   int a_RelY,   int a_RelZ,   BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta)
+{
+	int idx = MakeIndex(a_RelX, a_RelY, a_RelZ);
+	if (m_BlockTypes == NULL)
+	{
+		LOGWARNING("%s: BlockTypes not available but requested to be written to.", __FUNCTION__);
+	}
+	else
+	{
+		m_BlockTypes[idx] = a_BlockType;
+	}
+	if (m_BlockMetas == NULL)
+	{
+		LOGWARNING("%s: BlockMetas not available but requested to be written to.", __FUNCTION__);
+	}
+	else
+	{
+		m_BlockMetas[idx] = a_BlockMeta;
+	}
+}
+
+
+
+
+
+void cBlockArea::GetBlockTypeMeta(int a_BlockX, int a_BlockY, int a_BlockZ, BLOCKTYPE & a_BlockType, NIBBLETYPE & a_BlockMeta) const
+{
+	return GetRelBlockTypeMeta(a_BlockX - m_OriginX, a_BlockY - m_OriginY, a_BlockZ - m_OriginZ, a_BlockType, a_BlockMeta);
+}
+
+
+
+
+
+void cBlockArea::GetRelBlockTypeMeta(int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE & a_BlockType, NIBBLETYPE & a_BlockMeta) const
+{
+	int idx = MakeIndex(a_RelX, a_RelY, a_RelZ);
+	if (m_BlockTypes == NULL)
+	{
+		LOGWARNING("cBlockArea: BlockTypes have not been read!");
+		a_BlockType = E_BLOCK_AIR;
+	}
+	else
+	{
+		a_BlockType = m_BlockTypes[idx];
+	}
+	
+	if (m_BlockMetas == NULL)
+	{
+		LOGWARNING("cBlockArea: BlockMetas have not been read!");
+		a_BlockMeta = 0;
+	}
+	else
+	{
+		a_BlockMeta = m_BlockMetas[idx];
+	}
+}
+
+
+
+
+
+int cBlockArea::GetDataTypes(void) const
+{
+	int res = 0;
+	if (m_BlockTypes != NULL)
+	{
+		res |= baTypes;
+	}
+	if (m_BlockMetas != NULL)
+	{
+		res |= baMetas;
+	}
+	if (m_BlockLight != NULL)
+	{
+		res |= baLight;
+	}
+	if (m_BlockSkyLight != NULL)
+	{
+		res |= baSkyLight;
+	}
+	return res;
+}
+
+
+
+
+
+bool cBlockArea::SetSize(int a_SizeX, int a_SizeY, int a_SizeZ, int a_DataTypes)
+{
+	ASSERT(m_BlockTypes == NULL);  // Has been cleared
+	
+	if (a_DataTypes & baTypes)
+	{
+		m_BlockTypes = new BLOCKTYPE[a_SizeX * a_SizeY * a_SizeZ];
+		if (m_BlockTypes == NULL)
+		{
+			return false;
+		}
+	}
+	if (a_DataTypes & baMetas)
+	{
+		m_BlockMetas = new NIBBLETYPE[a_SizeX * a_SizeY * a_SizeZ];
+		if (m_BlockMetas == NULL)
+		{
+			delete[] m_BlockTypes;
+			return false;
+		}
+	}
+	if (a_DataTypes & baLight)
+	{
+		m_BlockLight = new NIBBLETYPE[a_SizeX * a_SizeY * a_SizeZ];
+		if (m_BlockLight == NULL)
+		{
+			delete[] m_BlockMetas;
+			delete[] m_BlockTypes;
+			return false;
+		}
+	}
+	if (a_DataTypes & baSkyLight)
+	{
+		m_BlockSkyLight = new NIBBLETYPE[a_SizeX * a_SizeY * a_SizeZ];
+		if (m_BlockSkyLight == NULL)
+		{
+			delete[] m_BlockLight;
+			delete[] m_BlockMetas;
+			delete[] m_BlockTypes;
+			return false;
+		}
+	}
+	m_SizeX = a_SizeX;
+	m_SizeY = a_SizeY;
+	m_SizeZ = a_SizeZ;
+	return true;
+}
+
+
+
+
+
+int cBlockArea::MakeIndex(int a_RelX, int a_RelY, int a_RelZ) const
+{
+	ASSERT(a_RelX >= 0);
+	ASSERT(a_RelX < m_SizeX);
+	ASSERT(a_RelY >= 0);
+	ASSERT(a_RelY < m_SizeY);
+	ASSERT(a_RelZ >= 0);
+	ASSERT(a_RelZ < m_SizeZ);
+	
+	return a_RelX + a_RelZ * m_SizeX + a_RelY * m_SizeX * m_SizeZ;
+}
+
+
+
+
+
+void cBlockArea::SetRelNibble(int a_RelX, int a_RelY, int a_RelZ, NIBBLETYPE a_Value, NIBBLETYPE * a_Array)
+{
+	if (a_Array == NULL)
+	{
+		LOGWARNING("cBlockArea: datatype has not been read!");
+		return;
+	}
+	a_Array[MakeIndex(a_RelX, a_RelY, a_RelZ)] = a_Value;
+}
+
+
+
+
+
+void cBlockArea::SetNibble(int a_BlockX, int a_BlockY, int a_BlockZ, NIBBLETYPE a_Value, NIBBLETYPE * a_Array)
+{
+	SetRelNibble(a_BlockX - m_OriginX, a_BlockY - m_OriginY, a_BlockZ - m_OriginZ, a_Value, a_Array);
+}
+
+
+
+
+
+NIBBLETYPE cBlockArea::GetRelNibble(int a_RelX, int a_RelY, int a_RelZ, NIBBLETYPE * a_Array) const
+{
+	if (a_Array == NULL)
+	{
+		LOGWARNING("cBlockArea: datatype has not been read!");
+		return 16;
+	}
+	return a_Array[MakeIndex(a_RelX, a_RelY, a_RelZ)];
+}
+
+
+
+
+
+NIBBLETYPE cBlockArea::GetNibble(int a_BlockX, int a_BlockY, int a_BlockZ, NIBBLETYPE * a_Array) const
+{
+	return GetRelNibble(a_BlockX - m_OriginX, a_BlockY - m_OriginY, a_BlockZ - m_OriginZ, a_Array);
+}
+
+
+
+
+
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// cBlockArea::cChunkReader:
+
+cBlockArea::cChunkReader::cChunkReader(cBlockArea & a_Area) :
+	m_Area(a_Area),
+	m_OriginX(a_Area.m_OriginX),
+	m_OriginY(a_Area.m_OriginY),
+	m_OriginZ(a_Area.m_OriginZ)
+{
+}
+
+
+
+
+
+void cBlockArea::cChunkReader::CopyNibbles(NIBBLETYPE * a_AreaDst, const NIBBLETYPE * a_ChunkSrc)
+{
+	int SizeY = m_Area.m_SizeY;
+	int MinY = m_OriginY;
+	
+	// SizeX, SizeZ are the dmensions of the block data to copy from the current chunk (size of the geometric union)
+	// OffX, OffZ are the offsets of the current chunk data from the area origin
+	// BaseX, BaseZ are the offsets of the area data within the current chunk from the chunk borders
+	int SizeX = cChunkDef::Width;
+	int SizeZ = cChunkDef::Width;
+	int OffX, OffZ;
+	int BaseX, BaseZ;
+	OffX = m_CurrentChunkX * cChunkDef::Width - m_OriginX;
+	if (OffX < 0)
+	{
+		BaseX = -OffX;
+		SizeX += OffX;  // SizeX is decreased, OffX is negative
+		OffX = 0;
+	}
+	else
+	{
+		BaseX = 0;
+	}
+	OffZ = m_CurrentChunkZ * cChunkDef::Width - m_OriginZ;
+	if (OffZ < 0)
+	{
+		BaseZ = -OffZ;
+		SizeZ += OffZ;  // SizeZ is decreased, OffZ is negative
+		OffZ = 0;
+	}
+	else
+	{
+		BaseZ = 0;
+	}
+	// If the chunk extends beyond the area in the X or Z axis, cut off the Size:
+	if ((m_CurrentChunkX + 1) * cChunkDef::Width > m_OriginX + m_Area.m_SizeX)
+	{
+		SizeX -= (m_CurrentChunkX + 1) * cChunkDef::Width - (m_OriginX + m_Area.m_SizeX);
+	}
+	if ((m_CurrentChunkZ + 1) * cChunkDef::Width > m_OriginZ + m_Area.m_SizeZ)
+	{
+		SizeZ -= (m_CurrentChunkZ + 1) * cChunkDef::Width - (m_OriginZ + m_Area.m_SizeZ);
+	}
+
+	for (int y = 0; y < SizeY; y++)
+	{
+		int ChunkY = MinY + y;
+		int AreaY = y;
+		for (int z = 0; z < SizeZ; z++)
+		{
+			int ChunkZ = BaseZ + z;
+			int AreaZ = OffZ + z;
+			for (int x = 0; x < SizeX; x++)
+			{
+				int ChunkX = BaseX + x;
+				int AreaX = OffX + x;
+				a_AreaDst[m_Area.MakeIndex(AreaX, AreaY, AreaZ)] = cChunkDef::GetNibble(a_ChunkSrc, ChunkX, ChunkY, ChunkZ);
+			}  // for x
+		}  // for z
+	}  // for y
+}
+
+
+
+
+
+bool cBlockArea::cChunkReader::Coords(int a_ChunkX, int a_ChunkZ)
+{
+	m_CurrentChunkX = a_ChunkX;
+	m_CurrentChunkZ = a_ChunkZ;
+	return true;
+}
+
+
+
+
+
+void cBlockArea::cChunkReader::BlockTypes(const BLOCKTYPE * a_BlockTypes)
+{
+	if (m_Area.m_BlockTypes == NULL)
+	{
+		// Don't want BlockTypes
+		return;
+	}
+	
+	int SizeY = m_Area.m_SizeY;
+	int MinY = m_OriginY;
+	
+	// SizeX, SizeZ are the dmensions of the block data to copy from the current chunk (size of the geometric union)
+	// OffX, OffZ are the offsets of the current chunk data from the area origin
+	// BaseX, BaseZ are the offsets of the area data within the current chunk from the chunk borders
+	int SizeX = cChunkDef::Width;
+	int SizeZ = cChunkDef::Width;
+	int OffX, OffZ;
+	int BaseX, BaseZ;
+	OffX = m_CurrentChunkX * cChunkDef::Width - m_OriginX;
+	if (OffX < 0)
+	{
+		BaseX = -OffX;
+		SizeX += OffX;  // SizeX is decreased, OffX is negative
+		OffX = 0;
+	}
+	else
+	{
+		BaseX = 0;
+	}
+	OffZ = m_CurrentChunkZ * cChunkDef::Width - m_OriginZ;
+	if (OffZ < 0)
+	{
+		BaseZ = -OffZ;
+		SizeZ += OffZ;  // SizeZ is decreased, OffZ is negative
+		OffZ = 0;
+	}
+	else
+	{
+		BaseZ = 0;
+	}
+	// If the chunk extends beyond the area in the X or Z axis, cut off the Size:
+	if ((m_CurrentChunkX + 1) * cChunkDef::Width > m_OriginX + m_Area.m_SizeX)
+	{
+		SizeX -= (m_CurrentChunkX + 1) * cChunkDef::Width - (m_OriginX + m_Area.m_SizeX);
+	}
+	if ((m_CurrentChunkZ + 1) * cChunkDef::Width > m_OriginZ + m_Area.m_SizeZ)
+	{
+		SizeZ -= (m_CurrentChunkZ + 1) * cChunkDef::Width - (m_OriginZ + m_Area.m_SizeZ);
+	}
+
+	for (int y = 0; y < SizeY; y++)
+	{
+		int ChunkY = MinY + y;
+		int AreaY = y;
+		for (int z = 0; z < SizeZ; z++)
+		{
+			int ChunkZ = BaseZ + z;
+			int AreaZ = OffZ + z;
+			for (int x = 0; x < SizeX; x++)
+			{
+				int ChunkX = BaseX + x;
+				int AreaX = OffX + x;
+				m_Area.m_BlockTypes[m_Area.MakeIndex(AreaX, AreaY, AreaZ)] = cChunkDef::GetBlock(a_BlockTypes, ChunkX, ChunkY, ChunkZ);
+			}  // for x
+		}  // for z
+	}  // for y
+}
+
+
+
+
+
+void cBlockArea::cChunkReader::BlockMeta(const NIBBLETYPE * a_BlockMetas)
+{
+	if (m_Area.m_BlockMetas == NULL)
+	{
+		// Don't want metas
+		return;
+	}
+	CopyNibbles(m_Area.m_BlockMetas, a_BlockMetas);
+}
+
+
+
+
+
+void cBlockArea::cChunkReader::BlockLight(const NIBBLETYPE * a_BlockLight)
+{
+	if (m_Area.m_BlockLight == NULL)
+	{
+		// Don't want light
+		return;
+	}
+	CopyNibbles(m_Area.m_BlockLight, a_BlockLight);
+}
+
+
+
+
+
+void cBlockArea::cChunkReader::BlockSkyLight(const NIBBLETYPE * a_BlockSkyLight)
+{
+	if (m_Area.m_BlockSkyLight == NULL)
+	{
+		// Don't want skylight
+		return;
+	}
+	CopyNibbles(m_Area.m_BlockSkyLight, a_BlockSkyLight);
+}
+
+
+
+
+
+void cBlockArea::CropBlockTypes(int a_AddMinX, int a_SubMaxX, int a_AddMinY, int a_SubMaxY, int a_AddMinZ, int a_SubMaxZ)
+{
+	int NewSizeX = GetSizeX() - a_AddMinX - a_SubMaxX;
+	int NewSizeY = GetSizeY() - a_AddMinY - a_SubMaxY;
+	int NewSizeZ = GetSizeZ() - a_AddMinZ - a_SubMaxZ;
+	BLOCKTYPE * NewBlockTypes = new BLOCKTYPE[NewSizeX * NewSizeY * NewSizeZ];
+	int idx = 0;
+	for (int y = 0; y < NewSizeY; y++)
+	{
+		for (int z = 0; z < NewSizeZ; z++)
+		{
+			for (int x = 0; x < NewSizeX; x++)
+			{
+				int OldIndex = MakeIndex(x + a_AddMinX, y + a_AddMinY, z + a_AddMinZ);
+				NewBlockTypes[idx++] = m_BlockTypes[OldIndex];
+			}  // for x
+		}  // for z
+	}  // for y
+	delete m_BlockTypes;
+	m_BlockTypes = NewBlockTypes;
+}
+
+
+
+
+
+void cBlockArea::CropNibbles(NIBBLEARRAY & a_Array, int a_AddMinX, int a_SubMaxX, int a_AddMinY, int a_SubMaxY, int a_AddMinZ, int a_SubMaxZ)
+{
+	int NewSizeX = GetSizeX() - a_AddMinX - a_SubMaxX;
+	int NewSizeY = GetSizeY() - a_AddMinY - a_SubMaxY;
+	int NewSizeZ = GetSizeZ() - a_AddMinZ - a_SubMaxZ;
+	NIBBLETYPE * NewNibbles = new NIBBLETYPE[NewSizeX * NewSizeY * NewSizeZ];
+	int idx = 0;
+	for (int y = 0; y < NewSizeY; y++)
+	{
+		for (int z = 0; z < NewSizeZ; z++)
+		{
+			for (int x = 0; x < NewSizeX; x++)
+			{
+				NewNibbles[idx++] = a_Array[MakeIndex(x + a_AddMinX, y + a_AddMinY, z + a_AddMinZ)];
+			}  // for x
+		}  // for z
+	}  // for y
+	delete a_Array;
+	a_Array = NewNibbles;
+}
+
+
+
+
+
+void cBlockArea::ExpandBlockTypes(int a_SubMinX, int a_AddMaxX, int a_SubMinY, int a_AddMaxY, int a_SubMinZ, int a_AddMaxZ)
+{
+	int NewSizeX = m_SizeX + a_SubMinX + a_AddMaxX;
+	int NewSizeY = m_SizeY + a_SubMinY + a_AddMaxY;
+	int NewSizeZ = m_SizeZ + a_SubMinZ + a_AddMaxZ;
+	int BlockCount = NewSizeX * NewSizeY * NewSizeZ;
+	BLOCKTYPE * NewBlockTypes = new BLOCKTYPE[BlockCount];
+	memset(NewBlockTypes, 0, BlockCount * sizeof(BLOCKTYPE));
+	int OldIndex = 0;
+	for (int y = 0; y < m_SizeY; y++)
+	{
+		int IndexBaseY = (y + a_SubMinY) * m_SizeX * m_SizeZ;
+		for (int z = 0; z < m_SizeZ; z++)
+		{
+			int IndexBaseZ = IndexBaseY + (z + a_SubMinZ) * m_SizeX;
+			int idx = IndexBaseZ + a_SubMinX;
+			for (int x = 0; x < m_SizeX; x++)
+			{
+				NewBlockTypes[idx++] = m_BlockTypes[OldIndex++];
+			}  // for x
+		}  // for z
+	}  // for y
+	delete m_BlockTypes;
+	m_BlockTypes = NewBlockTypes;
+}
+
+
+
+
+
+void cBlockArea::ExpandNibbles(NIBBLEARRAY & a_Array, int a_SubMinX, int a_AddMaxX, int a_SubMinY, int a_AddMaxY, int a_SubMinZ, int a_AddMaxZ)
+{
+	int NewSizeX = m_SizeX + a_SubMinX + a_AddMaxX;
+	int NewSizeY = m_SizeY + a_SubMinY + a_AddMaxY;
+	int NewSizeZ = m_SizeZ + a_SubMinZ + a_AddMaxZ;
+	int BlockCount = NewSizeX * NewSizeY * NewSizeZ;
+	NIBBLETYPE * NewNibbles = new NIBBLETYPE[BlockCount];
+	memset(NewNibbles, 0, BlockCount * sizeof(NIBBLETYPE));
+	int OldIndex = 0;
+	for (int y = 0; y < m_SizeY; y++)
+	{
+		int IndexBaseY = (y + a_SubMinY) * m_SizeX * m_SizeZ;
+		for (int z = 0; z < m_SizeZ; z++)
+		{
+			int IndexBaseZ = IndexBaseY + (z + a_SubMinZ) * m_SizeX;
+			int idx = IndexBaseZ + a_SubMinX;
+			for (int x = 0; x < m_SizeX; x++)
+			{
+				NewNibbles[idx++] = a_Array[OldIndex++];
+			}  // for x
+		}  // for z
+	}  // for y
+	delete a_Array;
+	a_Array = NewNibbles;
+}
+
+
+
+
+
+bool cBlockArea::LoadFromSchematicNBT(cParsedNBT & a_NBT)
+{
+	int TMaterials = a_NBT.FindChildByName(a_NBT.GetRoot(), "Materials");
+	if ((TMaterials > 0) && (a_NBT.GetType(TMaterials) == TAG_String))
+	{
+		AString Materials = a_NBT.GetString(TMaterials);
+		if (Materials.compare("Alpha") != 0)
+		{
+			LOG("Materials tag is present and \"%s\" instead of \"Alpha\". Possibly a wrong-format schematic file.", Materials.c_str());
+			return false;
+		}
+	}
+	int TSizeX = a_NBT.FindChildByName(a_NBT.GetRoot(), "Width");
+	int TSizeY = a_NBT.FindChildByName(a_NBT.GetRoot(), "Height");
+	int TSizeZ = a_NBT.FindChildByName(a_NBT.GetRoot(), "Length");
+	if (
+		(TSizeX < 0) || (TSizeY < 0) || (TSizeZ < 0) ||
+		(a_NBT.GetType(TSizeX) != TAG_Short) ||
+		(a_NBT.GetType(TSizeY) != TAG_Short) ||
+		(a_NBT.GetType(TSizeZ) != TAG_Short)
+	)
+	{
+		LOG("Dimensions are missing from the schematic file (%d, %d, %d), (%d, %d, %d)",
+			TSizeX, TSizeY, TSizeZ,
+			a_NBT.GetType(TSizeX), a_NBT.GetType(TSizeY), a_NBT.GetType(TSizeZ)
+		);
+		return false;
+	}
+	
+	int SizeX = a_NBT.GetShort(TSizeX);
+	int SizeY = a_NBT.GetShort(TSizeY);
+	int SizeZ = a_NBT.GetShort(TSizeZ);
+	if ((SizeX < 1) || (SizeY < 1) || (SizeZ < 1))
+	{
+		LOG("Dimensions are invalid in the schematic file: %d, %d, %d", SizeX, SizeY, SizeZ);
+		return false;
+	}
+	
+	int TBlockTypes = a_NBT.FindChildByName(a_NBT.GetRoot(), "Blocks");
+	int TBlockMetas = a_NBT.FindChildByName(a_NBT.GetRoot(), "Data");
+	if ((TBlockTypes < 0) || (a_NBT.GetType(TBlockTypes) != TAG_ByteArray))
+	{
+		LOG("BlockTypes are invalid in the schematic file: %d", TBlockTypes);
+		return false;
+	}
+	bool AreMetasPresent = (TBlockMetas > 0) && (a_NBT.GetType(TBlockMetas) == TAG_ByteArray);
+	
+	Clear();
+	SetSize(SizeX, SizeY, SizeZ, AreMetasPresent ? (baTypes | baMetas) : baTypes);
+	
+	// Copy the block types and metas:
+	int NumBytes = m_SizeX * m_SizeY * m_SizeZ;
+	if (a_NBT.GetDataLength(TBlockTypes) < NumBytes)
+	{
+		LOG("BlockTypes truncated in the schematic file (exp %d, got %d bytes). Loading partial.",
+			NumBytes, a_NBT.GetDataLength(TBlockTypes)
+		);
+		NumBytes = a_NBT.GetDataLength(TBlockTypes);
+	}
+	memcpy(m_BlockTypes, a_NBT.GetData(TBlockTypes), NumBytes);
+	
+	if (AreMetasPresent)
+	{
+		int NumBytes = m_SizeX * m_SizeY * m_SizeZ;
+		if (a_NBT.GetDataLength(TBlockMetas) < NumBytes)
+		{
+			LOG("BlockMetas truncated in the schematic file (exp %d, got %d bytes). Loading partial.",
+				NumBytes, a_NBT.GetDataLength(TBlockMetas)
+			);
+			NumBytes = a_NBT.GetDataLength(TBlockMetas);
+		}
+		memcpy(m_BlockMetas, a_NBT.GetData(TBlockMetas), NumBytes);
+	}
+	
+	return true;
+}
+
+
+
+
+void cBlockArea::RelSetData(
+	int a_RelX, int a_RelY, int a_RelZ,
+	int a_DataTypes, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta,
+	NIBBLETYPE a_BlockLight, NIBBLETYPE a_BlockSkyLight
+)
+{
+	int Index = MakeIndex(a_RelX, a_RelY, a_RelZ);
+	if ((a_DataTypes & baTypes) != 0)
+	{
+		m_BlockTypes[Index] = a_BlockType;
+	}
+	if ((a_DataTypes & baMetas) != 0)
+	{
+		m_BlockMetas[Index] = a_BlockMeta;
+	}
+	if ((a_DataTypes & baLight) != 0)
+	{
+		m_BlockLight[Index] = a_BlockLight;
+	}
+	if ((a_DataTypes & baSkyLight) != 0)
+	{
+		m_BlockSkyLight[Index] = a_BlockSkyLight;
+	}
+}
+
+
+
+