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-rw-r--r--src/ChunkData.h281
1 files changed, 281 insertions, 0 deletions
diff --git a/src/ChunkData.h b/src/ChunkData.h
new file mode 100644
index 000000000..9c852ee24
--- /dev/null
+++ b/src/ChunkData.h
@@ -0,0 +1,281 @@
+
+#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 cChunkData
+{
+public:
+
+ cChunkData()
+ #if __cplusplus < 201103L
+ // auto_ptr style interface for memory management
+ : IsOwner(true)
+ #endif
+ {
+ memset(m_Sections, 0, sizeof(m_Sections));
+ }
+ ~cChunkData()
+ {
+ #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] == NULL) Free(m_Sections[i]);;
+ }
+ }
+
+ #if __cplusplus < 201103L
+ // auto_ptr style interface for memory management
+ cChunkData(const cChunkData& other) :
+ IsOwner(true)
+ {
+ for (int i = 0; i < CHUNK_SECTION_NUM; i++)
+ {
+ m_Sections[i] = other.m_Sections[i];
+ }
+ other.IsOwner = false;
+ }
+
+ cChunkData& operator=(const cChunkData& other)
+ {
+ if (&other != this)
+ {
+ 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;
+ }
+ return *this;
+
+ }
+ #else
+ // unique_ptr style interface for memory management
+ cChunkData(cChunkData&& other)
+ {
+ for (int i = 0; i < CHUNK_SECTION_NUM; i++)
+ {
+ m_Sections[i] = other.m_Sections[i];
+ other.m_Sections[i] = 0;
+ }
+ }
+
+ cChunkData& operator=(cChunkData&& other)
+ {
+ if (&other != this)
+ {
+ for (int i = 0; i < CHUNK_SECTION_NUM; i++)
+ {
+ Free(m_Sections[i]);;
+ m_Sections[i] = other.m_Sections[i];
+ other.m_Sections[i] = 0;
+ }
+ }
+ return *this;
+ }
+ #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] != NULL)
+ {
+ 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(!"cChunkData::SetMeta(): index out of range!");
+ return;
+ }
+
+ int Section = a_RelY / CHUNK_SECTION_HEIGHT;
+ if (m_Sections[Section] == NULL)
+ {
+ if (a_Block == 0x00)
+ {
+ return;
+ }
+ m_Sections[Section] = Allocate();
+ if (m_Sections[Section] == NULL)
+ {
+ ASSERT(!"Failed to allocate a new section in Chunkbuffer");
+ return;
+ }
+ ZeroSection(m_Sections[Section]);
+ }
+ 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] != NULL)
+ {
+ 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(!"cChunkData::GetMeta(): coords out of chunk range!");
+ return 0;
+ }
+
+ bool 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(!"cChunkData::SetMeta(): index out of range!");
+ return false;
+ }
+
+ int Section = a_RelY / CHUNK_SECTION_HEIGHT;
+ if (m_Sections[Section] == NULL)
+ {
+ if ((a_Nibble & 0xf) == 0x00)
+ {
+ return false;
+ }
+ m_Sections[Section] = Allocate();
+ if (m_Sections[Section] == NULL)
+ {
+ ASSERT(!"Failed to allocate a new section in Chunkbuffer");
+ return false;
+ }
+ ZeroSection(m_Sections[Section]);
+ }
+ int Index = cChunkDef::MakeIndexNoCheck(a_RelX, a_RelY - (Section * CHUNK_SECTION_HEIGHT), a_RelZ);
+ NIBBLETYPE oldval = m_Sections[Section]->m_BlockMeta[Index / 2] >> ((Index & 1) * 4) & 0xf;
+ 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
+ );
+ return oldval == a_Nibble;
+ }
+
+ 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] != NULL)
+ {
+ 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(!"cChunkData::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] != NULL)
+ {
+ 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 0xF;
+ }
+ }
+ ASSERT(!"cChunkData::GetMeta(): coords out of chunk range!");
+ return 0;
+ }
+
+ cChunkData 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;
+
+ void ZeroSection(sChunkSection * ptr) const;
+};
+
+
+
+
+
+
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