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-rw-r--r--src/ChunkBuffer.h319
1 files changed, 319 insertions, 0 deletions
diff --git a/src/ChunkBuffer.h b/src/ChunkBuffer.h
new file mode 100644
index 000000000..410532232
--- /dev/null
+++ b/src/ChunkBuffer.h
@@ -0,0 +1,319 @@
+
+#pragma once
+
+
+#include <cstring>
+
+
+#include "ChunkDef.h"
+
+
+#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]) Free(m_Sections[i]);;
+ }
+ }
+
+ #if __cplusplus < 201103L
+ // auto_ptr style interface for memory management
+ cChunkBuffer(const 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=(const cChunkBuffer& other)
+ {
+ if(IsOwner)
+ {
+ for (int i = 0; i < CHUNK_SECTION_NUM; i++)
+ {
+ if(m_Sections[i]) Free(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(const cChunkBuffer&& other)
+ {
+ for (int i = 0; i < CHUNK_SECTION_NUM; i++)
+ {
+ m_Sections[i] = other.m_Sections[i];
+ }
+ }
+
+ void operator=(const cChunkBuffer&& other)
+ {
+ for (int i = 0; i < CHUNK_SECTION_NUM; i++)
+ {
+ if(m_Sections[i]) Free(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
+ mutable 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;
+ void Free(sChunkSection * ptr) 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);
+ }
+} ;
+
+
+
+
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