1 files changed, 310 insertions, 0 deletions

diff --git a/src/ChunkBuffer.h b/src/ChunkBuffer.h
new file mode 100644
index 000000000..44e447c82
--- /dev/null
+++ b/src/ChunkBuffer.h
@@ -0,0 +1,310 @@
+
+#pragma once
+
+#define CHUNK_SECTION_HEIGHT 16
+#define CHUNK_SECTION_NUM (256 / CHUNK_SECTION_HEIGHT)
+
+#if __cplusplus < 201103L
+// auto_ptr style interface for memory management
+#else
+// unique_ptr style interface for memory management
+#endif
+
+class cChunkBuffer
+{
+public:
+
+	cChunkBuffer()
+	#if __cplusplus < 201103L
+	// auto_ptr style interface for memory management
+	: IsOwner(true)
+	#endif
+	{
+		memset(m_Sections, 0, sizeof(m_Sections));
+	}
+	~cChunkBuffer()
+	{
+		#if __cplusplus < 201103L
+		// auto_ptr style interface for memory management
+		if(!IsOwner) return;
+		#endif
+		for (int i = 0; i < CHUNK_SECTION_NUM; i++)
+		{
+			if(m_Sections[i]) delete m_Sections[i];
+		}
+	}
+	
+	#if __cplusplus < 201103L
+	// auto_ptr style interface for memory management
+	cChunkBuffer(cChunkBuffer& other) :
+	IsOwner(true);
+	{
+		for (int i = 0; i < CHUNK_SECTION_NUM; i++)
+		{
+			m_Sections[i] = other.m_Sections[i];
+		}
+		other.IsOwner = false;
+	}
+	void operator=(cChunkBuffer& other)
+	{
+		if(IsOwner)
+		{
+			for (int i = 0; i < CHUNK_SECTION_NUM; i++)
+			{
+				if(m_Sections[i]) delete m_Sections[i];
+			}
+		}
+		IsOwner = true;
+		for (int i = 0; i < CHUNK_SECTION_NUM; i++)
+		{
+			m_Sections[i] = other.m_Sections[i];
+		}
+		other.IsOwner = false;
+	}
+	#else
+	// unique_ptr style interface for memory management
+	cChunkBuffer(cChunkBuffer&& other)
+	{
+		for (int i = 0; i < CHUNK_SECTION_NUM; i++)
+		{
+			m_Sections[i] = other.m_Sections[i];
+		}
+	}
+	
+	void operator=(cChunkBuffer&& other)
+	{
+		for (int i = 0; i < CHUNK_SECTION_NUM; i++)
+		{
+			if(m_Sections[i]) delete m_Sections[i];
+			m_Sections[i] = other.m_Sections[i];
+		}
+	}
+	#endif
+
+	BLOCKTYPE GetBlock(int a_X, int a_Y, int a_Z) const
+	{
+		ASSERT((a_X >= 0) && (a_X < cChunkDef::Width));
+		ASSERT((a_Y >= 0) && (a_Y < cChunkDef::Height));
+		ASSERT((a_Z >= 0) && (a_Z < cChunkDef::Width));
+		int Section = a_Y / CHUNK_SECTION_HEIGHT;
+		if(m_Sections[Section])
+		{
+			int Index = cChunkDef::MakeIndexNoCheck(a_X, a_Y - (Section * CHUNK_SECTION_HEIGHT), a_Z);
+			return m_Sections[Section]->m_BlockTypes[Index];
+		}
+		else
+		{
+			return 0;
+		}
+	}
+	
+	void SetBlock(int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE a_Block)
+	{
+		if (
+			(a_RelX >= cChunkDef::Width)  || (a_RelX < 0) ||
+			(a_RelY >= cChunkDef::Height) || (a_RelY < 0) ||
+			(a_RelZ >= cChunkDef::Width)  || (a_RelZ < 0)
+		)
+		{
+			ASSERT(!"cChunkBuffer::SetMeta(): index out of range!");
+			return;
+		}
+
+		int Section = a_RelY / CHUNK_SECTION_HEIGHT;
+		if(!m_Sections[Section])
+		{
+			m_Sections[Section] = Allocate();
+			if(!m_Sections[Section])
+			{
+				ASSERT("Failed to allocate a new section in Chunkbuffer");
+				return;
+			}
+		}
+		int Index = cChunkDef::MakeIndexNoCheck(a_RelX, a_RelY - (Section * CHUNK_SECTION_HEIGHT), a_RelZ);
+		m_Sections[Section]->m_BlockTypes[Index] = a_Block;
+	}
+
+	NIBBLETYPE GetMeta(int a_RelX, int a_RelY, int a_RelZ) const
+	{
+		if ((a_RelX < cChunkDef::Width) && (a_RelX > -1) && (a_RelY < cChunkDef::Height) && (a_RelY > -1) && (a_RelZ < cChunkDef::Width) && (a_RelZ > -1))
+		{
+			int Section = a_RelY / CHUNK_SECTION_HEIGHT;
+			if(m_Sections[Section])
+			{
+				int Index = cChunkDef::MakeIndexNoCheck(a_RelX, a_RelY - (Section * CHUNK_SECTION_HEIGHT), a_RelZ);
+				return (m_Sections[Section]->m_BlockMeta[Index / 2] >> ((Index & 1) * 4)) & 0x0f;
+			}
+			else
+			{
+				return 0;
+			}
+		}
+		ASSERT(!"cChunkBuffer::GetMeta(): coords out of chunk range!");
+		return 0;
+	}
+	
+	void SetMeta(int a_RelX, int a_RelY, int a_RelZ, NIBBLETYPE a_Nibble)
+	{
+		if (
+			(a_RelX >= cChunkDef::Width)  || (a_RelX < 0) ||
+			(a_RelY >= cChunkDef::Height) || (a_RelY < 0) ||
+			(a_RelZ >= cChunkDef::Width)  || (a_RelZ < 0)
+		)
+		{
+			ASSERT(!"cChunkBuffer::SetMeta(): index out of range!");
+			return;
+		}
+
+		int Section = a_RelY / CHUNK_SECTION_HEIGHT;
+		if(!m_Sections[Section])
+		{
+			m_Sections[Section] = Allocate();
+			if(!m_Sections[Section])
+			{
+				ASSERT("Failed to allocate a new section in Chunkbuffer");
+				return;
+			}
+		}
+		int Index = cChunkDef::MakeIndexNoCheck(a_RelX, a_RelY - (Section * CHUNK_SECTION_HEIGHT), a_RelZ);
+		m_Sections[Section]->m_BlockMeta[Index / 2] = static_cast<NIBBLETYPE>(
+			(m_Sections[Section]->m_BlockMeta[Index / 2] & (0xf0 >> ((Index & 1) * 4))) |  // The untouched nibble
+			((a_Nibble & 0x0f) << ((Index & 1) * 4))  // The nibble being set
+		);
+	}
+	
+	NIBBLETYPE GetBlockLight(int a_RelX, int a_RelY, int a_RelZ) const
+	{
+		if ((a_RelX < cChunkDef::Width) && (a_RelX > -1) && (a_RelY < cChunkDef::Height) && (a_RelY > -1) && (a_RelZ < cChunkDef::Width) && (a_RelZ > -1))
+		{
+			int Section = a_RelY / CHUNK_SECTION_HEIGHT;
+			if(m_Sections[Section])
+			{
+				int Index = cChunkDef::MakeIndexNoCheck(a_RelX, a_RelY - (Section * CHUNK_SECTION_HEIGHT), a_RelZ);
+				return (m_Sections[Section]->m_BlockLight[Index / 2] >> ((Index & 1) * 4)) & 0x0f;
+			}
+			else
+			{
+				return 0;
+			}
+		}
+		ASSERT(!"cChunkBuffer::GetMeta(): coords out of chunk range!");
+		return 0;
+	}
+	
+	NIBBLETYPE GetSkyLight(int a_RelX, int a_RelY, int a_RelZ) const
+	{
+		if ((a_RelX < cChunkDef::Width) && (a_RelX > -1) && (a_RelY < cChunkDef::Height) && (a_RelY > -1) && (a_RelZ < cChunkDef::Width) && (a_RelZ > -1))
+		{
+			int Section = a_RelY / CHUNK_SECTION_HEIGHT;
+			if(m_Sections[Section])
+			{
+				int Index = cChunkDef::MakeIndexNoCheck(a_RelX, a_RelY - (Section * CHUNK_SECTION_HEIGHT), a_RelZ);
+				return (m_Sections[Section]->m_BlockLight[Index / 2] >> ((Index & 1) * 4)) & 0x0f;
+			}
+			else
+			{
+				return 0xFF;
+			}
+		}
+		ASSERT(!"cChunkBuffer::GetMeta(): coords out of chunk range!");
+		return 0;
+	}
+	
+	cChunkBuffer Copy() const;
+	void CopyBlocks   (BLOCKTYPE * a_dest, size_t a_Idx = 0, size_t length = cChunkDef::NumBlocks)  const;
+	void CopyMeta     (NIBBLETYPE * a_dest) const;
+	void CopyLight    (NIBBLETYPE * a_dest) const;
+	void CopySkyLight (NIBBLETYPE * a_dest) const;
+	
+	void SetBlocks    (const BLOCKTYPE * a_src);
+	void SetMeta      (const NIBBLETYPE * a_src);
+	void SetLight     (const NIBBLETYPE * a_src);
+	void SetSkyLight  (const NIBBLETYPE * a_src);
+	
+private:
+
+	#if __cplusplus < 201103L
+	// auto_ptr style interface for memory management
+	bool IsOwner;
+	#endif
+	
+	struct sChunkSection {
+		BLOCKTYPE  m_BlockTypes   [CHUNK_SECTION_HEIGHT * 16 * 16]    ;
+		NIBBLETYPE m_BlockMeta    [CHUNK_SECTION_HEIGHT * 16 * 16 / 2];
+		NIBBLETYPE m_BlockLight   [CHUNK_SECTION_HEIGHT * 16 * 16 / 2];
+		NIBBLETYPE m_BlockSkyLight[CHUNK_SECTION_HEIGHT * 16 * 16 / 2];
+	};
+	
+	sChunkSection *m_Sections[CHUNK_SECTION_NUM];
+	
+	sChunkSection * Allocate() const;
+};
+
+
+
+
+/** A simple implementation of the cChunkDataCallback interface that collects all block data into a buffer
+*/
+class cChunkBufferCollector :
+	public cChunkDataCallback
+{
+public:
+
+	cChunkBuffer m_BlockData;
+
+protected:
+
+	virtual void ChunkBuffer(const cChunkBuffer & a_BlockData) override
+	{
+		m_BlockData = a_BlockData.Copy();
+	}
+};
+
+
+/** A simple implementation of the cChunkDataCallback interface that collects all block data into a single buffer
+*/
+class cChunkDataCollector :
+public cChunkDataCallback
+{
+public:
+
+	// Must be unsigned char instead of BLOCKTYPE or NIBBLETYPE, because it houses both.
+	unsigned char m_BlockData[cChunkDef::BlockDataSize];
+
+protected:
+
+	virtual void ChunkBuffer(const cChunkBuffer & a_ChunkBuffer) override
+	{
+		a_ChunkBuffer.CopyBlocks(m_BlockData);
+		a_ChunkBuffer.CopyMeta(m_BlockData + cChunkDef::NumBlocks);
+		a_ChunkBuffer.CopyLight(m_BlockData + 3 * cChunkDef::NumBlocks / 2);
+		a_ChunkBuffer.CopySkyLight(m_BlockData + 2 * cChunkDef::NumBlocks);
+	}
+};
+
+/** A simple implementation of the cChunkDataCallback interface that collects all block data into a separate buffers
+*/
+class cChunkDataSeparateCollector :
+public cChunkDataCallback
+{
+public:
+
+	cChunkDef::BlockTypes m_BlockTypes;
+	cChunkDef::BlockNibbles m_BlockMetas;
+	cChunkDef::BlockNibbles m_BlockLight;
+	cChunkDef::BlockNibbles m_BlockSkyLight;
+
+protected:
+
+	virtual void ChunkBuffer(const cChunkBuffer & a_ChunkBuffer) override
+	{
+	a_ChunkBuffer.CopyBlocks(m_BlockTypes);
+	a_ChunkBuffer.CopyMeta(m_BlockMetas);
+	a_ChunkBuffer.CopyLight(m_BlockLight);
+	a_ChunkBuffer.CopySkyLight(m_BlockSkyLight);
+	}
+} ;
+
+
+
+