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Small optimizations in the SetNibble() and GetNibble() functions; removed unused lighting functions from cChunk 

git-svn-id: http://mc-server.googlecode.com/svn/trunk@408 0a769ca7-a7f5-676a-18bf-c427514a06d6
master
madmaxoft@gmail.com 2012-03-13 20:26:36 +00:00
parent d0a606959b
commit b8041509e5
2 changed files with 23 additions and 96 deletions
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4
source/cChunk.h
View File

@ -239,6 +239,7 @@ public:
inline static unsigned int MakeIndexNoCheck(int x, int y, int z)
{
#if AXIS_ORDER == AXIS_ORDER_XZY
// For some reason, NOT using the Horner schema is faster. Weird.
return x + (z * c_ChunkWidth) + (y * c_ChunkWidth * c_ChunkWidth); // 1.2 is XZY
#elif AXIS_ORDER == AXIS_ORDER_YZX
return y + (z * c_ChunkHeight) + (x * c_ChunkHeight * c_ChunkWidth); // 1.1 is YZX
@ -313,9 +314,6 @@ private:
cBlockEntity * GetBlockEntity( const Vector3i & a_BlockPos ) { return GetBlockEntity( a_BlockPos.x, a_BlockPos.y, a_BlockPos.z ); }
void SpreadLightOfBlock(char* a_LightBuffer, int a_X, int a_Y, int a_Z, char a_Falloff);
void SpreadLightOfBlockX(char* a_LightBuffer, int a_X, int a_Y, int a_Z);
void SpreadLightOfBlockY(char* a_LightBuffer, int a_X, int a_Y, int a_Z);
void SpreadLightOfBlockZ(char* a_LightBuffer, int a_X, int a_Y, int a_Z);
void CreateBlockEntities(void);

115
source/cChunk.inl.h
View File

@ -11,19 +11,11 @@
__C_CHUNK_INLINE__
char cChunk::GetNibble(char* a_Buffer, int a_BlockIdx)
char cChunk::GetNibble(char * a_Buffer, int a_BlockIdx)
{
if( a_BlockIdx > -1 && a_BlockIdx < c_NumBlocks )
if ((a_BlockIdx > -1) && (a_BlockIdx < c_NumBlocks))
{
const int cindex = (a_BlockIdx/2);
if( (a_BlockIdx & 1) == 0 )
{ // First half byte
return (a_Buffer[cindex] & 0x0f);
}
else
{
return ((a_Buffer[cindex] & 0xf0) >> 4);
}
return (a_Buffer[a_BlockIdx / 2] >> ((a_BlockIdx & 1) * 4)) & 0x0f;
}
return 0;
}
@ -33,23 +25,12 @@ char cChunk::GetNibble(char* a_Buffer, int a_BlockIdx)
__C_CHUNK_INLINE__
char cChunk::GetNibble(char* a_Buffer, int x, int y, int z)
char cChunk::GetNibble(char * a_Buffer, int x, int y, int z)
{
if( x < c_ChunkWidth && x > -1 && y < c_ChunkHeight && y > -1 && z < c_ChunkWidth && z > -1 )
if ((x < c_ChunkWidth) && (x > -1) && (y < c_ChunkHeight) && (y > -1) && (z < c_ChunkWidth) && (z > -1))
{
const int cindex = MakeIndexNoCheck(x, y, z)/2;
#if AXIS_ORDER == AXIS_ORDER_XZY
if( (x & 1) == 0 )
#elif AXIS_ORDER == AXIS_ORDER_YZX
if( (y & 1) == 0 )
#endif
{ // First half byte
return (a_Buffer[cindex] & 0x0f);
}
else
{
return ((a_Buffer[cindex] & 0xf0) >> 4);
}
int Index = MakeIndexNoCheck(x, y, z);
return (a_Buffer[Index / 2] >> ((Index & 1) * 4)) & 0x0f;
}
return 0;
}
@ -59,21 +40,14 @@ char cChunk::GetNibble(char* a_Buffer, int x, int y, int z)
__C_CHUNK_INLINE__
void cChunk::SetNibble(char* a_Buffer, int a_BlockIdx, char a_Light)
void cChunk::SetNibble(char * a_Buffer, int a_BlockIdx, char a_Nibble)
{
if( a_BlockIdx > -1 && a_BlockIdx < c_NumBlocks )
if ((a_BlockIdx > -1) && (a_BlockIdx < c_NumBlocks))
{
const int cindex = (a_BlockIdx/2);
if( (a_BlockIdx & 1) == 0 )
{ // First half byte
a_Buffer[cindex] &= 0xf0; // Set first half to 0
a_Buffer[cindex] |= (a_Light) & 0x0f;
}
else
{
a_Buffer[cindex] &= 0x0f; // Set second half to 0
a_Buffer[cindex] |= (a_Light << 4) & 0xf0;
}
a_Buffer[a_BlockIdx / 2] = (
(a_Buffer[a_BlockIdx / 2] & (0xf0 >> ((a_BlockIdx & 1) * 4))) | // The untouched nibble
((a_Nibble & 0x0f) << ((a_BlockIdx & 1) * 4)) // The nibble being set
);
}
}
@ -82,25 +56,15 @@ void cChunk::SetNibble(char* a_Buffer, int a_BlockIdx, char a_Light)
__C_CHUNK_INLINE__
void cChunk::SetNibble(char* a_Buffer, int x, int y, int z, char light)
void cChunk::SetNibble(char * a_Buffer, int x, int y, int z, char a_Nibble)
{
if( x < c_ChunkWidth && x > -1 && y < c_ChunkHeight && y > -1 && z < c_ChunkWidth && z > -1 )
if ((x < c_ChunkWidth) && (x > -1) && (y < c_ChunkHeight) && (y > -1) && (z < c_ChunkWidth) && (z > -1))
{
int cindex = MakeIndexNoCheck(x, y, z)/2;
#if AXIS_ORDER == AXIS_ORDER_XZY
if( (x & 1) == 0 )
#elif AXIS_ORDER == AXIS_ORDER_YZX
if( (y & 1) == 0 )
#endif
{ // First half byte
a_Buffer[cindex] &= 0xf0; // Set first half to 0
a_Buffer[cindex] |= (light) & 0x0f;
}
else
{
a_Buffer[cindex] &= 0x0f; // Set second half to 0
a_Buffer[cindex] |= (light << 4) & 0xf0;
}
int Index = MakeIndexNoCheck(x, y, z);
a_Buffer[Index / 2] = (
(a_Buffer[Index / 2] & (0xf0 >> ((Index & 1) * 4))) | // The untouched nibble
((a_Nibble & 0x0f) << ((Index & 1) * 4)) // The nibble being set
);
}
}
@ -109,7 +73,7 @@ void cChunk::SetNibble(char* a_Buffer, int x, int y, int z, char light)
__C_CHUNK_INLINE__
void cChunk::SpreadLightOfBlock(char* a_LightBuffer, int a_X, int a_Y, int a_Z, char a_Falloff)
void cChunk::SpreadLightOfBlock(char * a_LightBuffer, int a_X, int a_Y, int a_Z, char a_Falloff)
{
unsigned char CurrentLight = GetNibble( a_LightBuffer, a_X, a_Y, a_Z );
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) ) );
@ -125,43 +89,8 @@ void cChunk::SpreadLightOfBlock(char* a_LightBuffer, int a_X, int a_Y, int a_Z,
__C_CHUNK_INLINE__
void cChunk::SpreadLightOfBlockX(char* a_LightBuffer, int a_X, int a_Y, int a_Z)
{
unsigned char CurrentLight = GetNibble( a_LightBuffer, a_X, a_Y, a_Z );
SetNibble( a_LightBuffer, a_X-1, a_Y, a_Z, MAX(GetNibble( a_LightBuffer, a_X-1, a_Y, a_Z ), CurrentLight-1) );
SetNibble( a_LightBuffer, a_X+1, a_Y, a_Z, MAX(GetNibble( a_LightBuffer, a_X+1, a_Y, a_Z ), CurrentLight-1) );
MarkDirty();
}
#endif
__C_CHUNK_INLINE__
void cChunk::SpreadLightOfBlockY(char* a_LightBuffer, int a_X, int a_Y, int a_Z)
{
unsigned char CurrentLight = GetNibble( a_LightBuffer, a_X, a_Y, a_Z );
SetNibble( a_LightBuffer, a_X, a_Y-1, a_Z, MAX(GetNibble( a_LightBuffer, a_X, a_Y-1, a_Z ), CurrentLight-1) );
SetNibble( a_LightBuffer, a_X, a_Y+1, a_Z, MAX(GetNibble( a_LightBuffer, a_X, a_Y+1, a_Z ), CurrentLight-1) );
MarkDirty();
}
__C_CHUNK_INLINE__
void cChunk::SpreadLightOfBlockZ(char* a_LightBuffer, int a_X, int a_Y, int a_Z)
{
unsigned char CurrentLight = GetNibble( a_LightBuffer, a_X, a_Y, a_Z );
SetNibble( a_LightBuffer, a_X, a_Y, a_Z-1, MAX(GetNibble( a_LightBuffer, a_X, a_Y, a_Z-1 ), CurrentLight-1) );
SetNibble( a_LightBuffer, a_X, a_Y, a_Z+1, MAX(GetNibble( a_LightBuffer, a_X, a_Y, a_Z+1 ), CurrentLight-1) );
MarkDirty();
}
#endif