b8041509e5
git-svn-id: http://mc-server.googlecode.com/svn/trunk@408 0a769ca7-a7f5-676a-18bf-c427514a06d6
97 lines
2.5 KiB
C
97 lines
2.5 KiB
C
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#ifndef __C_CHUNK_INL_H__
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#define __C_CHUNK_INL_H__
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#ifndef MAX
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# define MAX(a,b) (((a)>(b))?(a):(b))
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#endif
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__C_CHUNK_INLINE__
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char cChunk::GetNibble(char * a_Buffer, int a_BlockIdx)
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{
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if ((a_BlockIdx > -1) && (a_BlockIdx < c_NumBlocks))
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{
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return (a_Buffer[a_BlockIdx / 2] >> ((a_BlockIdx & 1) * 4)) & 0x0f;
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}
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return 0;
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}
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__C_CHUNK_INLINE__
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char cChunk::GetNibble(char * a_Buffer, int x, int y, int z)
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{
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if ((x < c_ChunkWidth) && (x > -1) && (y < c_ChunkHeight) && (y > -1) && (z < c_ChunkWidth) && (z > -1))
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{
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int Index = MakeIndexNoCheck(x, y, z);
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return (a_Buffer[Index / 2] >> ((Index & 1) * 4)) & 0x0f;
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}
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return 0;
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}
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__C_CHUNK_INLINE__
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void cChunk::SetNibble(char * a_Buffer, int a_BlockIdx, char a_Nibble)
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{
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if ((a_BlockIdx > -1) && (a_BlockIdx < c_NumBlocks))
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{
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a_Buffer[a_BlockIdx / 2] = (
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(a_Buffer[a_BlockIdx / 2] & (0xf0 >> ((a_BlockIdx & 1) * 4))) | // The untouched nibble
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((a_Nibble & 0x0f) << ((a_BlockIdx & 1) * 4)) // The nibble being set
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);
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}
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}
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__C_CHUNK_INLINE__
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void cChunk::SetNibble(char * a_Buffer, int x, int y, int z, char a_Nibble)
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{
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if ((x < c_ChunkWidth) && (x > -1) && (y < c_ChunkHeight) && (y > -1) && (z < c_ChunkWidth) && (z > -1))
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{
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int Index = MakeIndexNoCheck(x, y, z);
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a_Buffer[Index / 2] = (
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(a_Buffer[Index / 2] & (0xf0 >> ((Index & 1) * 4))) | // The untouched nibble
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((a_Nibble & 0x0f) << ((Index & 1) * 4)) // The nibble being set
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);
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}
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}
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__C_CHUNK_INLINE__
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void cChunk::SpreadLightOfBlock(char * a_LightBuffer, int a_X, int a_Y, int a_Z, char a_Falloff)
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{
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unsigned char CurrentLight = GetNibble( a_LightBuffer, a_X, a_Y, a_Z );
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SetNibble( a_LightBuffer, a_X-1, a_Y, a_Z, MAX(GetNibble( a_LightBuffer, a_X-1, a_Y, a_Z ), MAX(0,CurrentLight-a_Falloff) ) );
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SetNibble( a_LightBuffer, a_X+1, a_Y, a_Z, MAX(GetNibble( a_LightBuffer, a_X+1, a_Y, a_Z ), MAX(0,CurrentLight-a_Falloff) ) );
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SetNibble( a_LightBuffer, a_X, a_Y-1, a_Z, MAX(GetNibble( a_LightBuffer, a_X, a_Y-1, a_Z ), MAX(0,CurrentLight-a_Falloff) ) );
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SetNibble( a_LightBuffer, a_X, a_Y+1, a_Z, MAX(GetNibble( a_LightBuffer, a_X, a_Y+1, a_Z ), MAX(0,CurrentLight-a_Falloff) ) );
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SetNibble( a_LightBuffer, a_X, a_Y, a_Z-1, MAX(GetNibble( a_LightBuffer, a_X, a_Y, a_Z-1 ), MAX(0,CurrentLight-a_Falloff) ) );
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SetNibble( a_LightBuffer, a_X, a_Y, a_Z+1, MAX(GetNibble( a_LightBuffer, a_X, a_Y, a_Z+1 ), MAX(0,CurrentLight-a_Falloff) ) );
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MarkDirty();
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}
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#endif
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