167 lines
4.3 KiB
C
167 lines
4.3 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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const int cindex = (a_BlockIdx/2);
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if( (a_BlockIdx & 1) == 0 )
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{ // First half byte
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return (a_Buffer[cindex] & 0x0f);
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}
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else
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{
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return ((a_Buffer[cindex] & 0xf0) >> 4);
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}
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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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const int cindex = MakeIndexNoCheck(x, y, z)/2;
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#if AXIS_ORDER == AXIS_ORDER_XZY
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if( (x & 1) == 0 )
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#elif AXIS_ORDER == AXIS_ORDER_YZX
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if( (y & 1) == 0 )
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#endif
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{ // First half byte
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return (a_Buffer[cindex] & 0x0f);
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}
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else
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{
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return ((a_Buffer[cindex] & 0xf0) >> 4);
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}
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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_Light)
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{
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if( a_BlockIdx > -1 && a_BlockIdx < c_NumBlocks )
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{
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const int cindex = (a_BlockIdx/2);
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if( (a_BlockIdx & 1) == 0 )
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{ // First half byte
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a_Buffer[cindex] &= 0xf0; // Set first half to 0
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a_Buffer[cindex] |= (a_Light) & 0x0f;
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}
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else
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{
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a_Buffer[cindex] &= 0x0f; // Set second half to 0
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a_Buffer[cindex] |= (a_Light << 4) & 0xf0;
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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 light)
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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 cindex = MakeIndexNoCheck(x, y, z)/2;
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#if AXIS_ORDER == AXIS_ORDER_XZY
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if( (x & 1) == 0 )
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#elif AXIS_ORDER == AXIS_ORDER_YZX
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if( (y & 1) == 0 )
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#endif
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{ // First half byte
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a_Buffer[cindex] &= 0xf0; // Set first half to 0
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a_Buffer[cindex] |= (light) & 0x0f;
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}
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else
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{
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a_Buffer[cindex] &= 0x0f; // Set second half to 0
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a_Buffer[cindex] |= (light << 4) & 0xf0;
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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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__C_CHUNK_INLINE__
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void cChunk::SpreadLightOfBlockX(char* a_LightBuffer, int a_X, int a_Y, int a_Z)
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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 ), CurrentLight-1) );
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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 ), CurrentLight-1) );
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MarkDirty();
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}
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__C_CHUNK_INLINE__
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void cChunk::SpreadLightOfBlockY(char* a_LightBuffer, int a_X, int a_Y, int a_Z)
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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, a_Y-1, a_Z, MAX(GetNibble( a_LightBuffer, a_X, a_Y-1, a_Z ), CurrentLight-1) );
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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 ), CurrentLight-1) );
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MarkDirty();
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}
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__C_CHUNK_INLINE__
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void cChunk::SpreadLightOfBlockZ(char* a_LightBuffer, int a_X, int a_Y, int a_Z)
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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, a_Y, a_Z-1, MAX(GetNibble( a_LightBuffer, a_X, a_Y, a_Z-1 ), CurrentLight-1) );
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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 ), CurrentLight-1) );
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MarkDirty();
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}
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#endif |