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Bitwise operation working for x,y, and z. Finally getting a speedup!

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This commit is contained in:
David Williams 2008-06-07 19:22:15 +00:00
parent 87507db94b
commit 12f9e0ebc8
1 changed files with 17 additions and 8 deletions
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25
source/SurfaceExtractors.cpp
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@ -240,8 +240,6 @@ namespace PolyVox
else if((x==0) && (y>0))
{
//Voxels values
const uint8_t v001 = volIter.peekVoxel0px0py1pz();
const uint8_t v101 = volIter.peekVoxel1px0py1pz();
const uint8_t v011 = volIter.peekVoxel0px1py1pz();
const uint8_t v111 = volIter.peekVoxel1px1py1pz();
@ -263,18 +261,29 @@ namespace PolyVox
else
{
//Voxels values
const uint8_t v001 = volIter.peekVoxel0px0py1pz();
const uint8_t v101 = volIter.peekVoxel1px0py1pz();
const uint8_t v011 = volIter.peekVoxel0px1py1pz();
const uint8_t v111 = volIter.peekVoxel1px1py1pz();
uint8_t iPreviousCubeIndex = previousBitmask[getIndex(x,y)];
iCubeIndex = iPreviousCubeIndex >> 4;
if (v001 == 0) iCubeIndex |= 16;
if (v101 == 0) iCubeIndex |= 32;
uint8_t iPreviousCubeIndexY = bitmask[getIndex(x,y-1)];
uint8_t bit7 = iPreviousCubeIndexY & 128;
uint8_t bit4 = bit7 >> 3;
uint8_t bit6 = iPreviousCubeIndexY & 64;
uint8_t bit5 = bit6 >> 1;
uint8_t iPreviousCubeIndexZ = previousBitmask[getIndex(x,y)];
iCubeIndex = iPreviousCubeIndexZ >> 4;
uint8_t iPreviousCubeIndexX = bitmask[getIndex(x-1,y)];
uint8_t bit6XXX = iPreviousCubeIndexX & 64;
uint8_t bit7XXX = bit6XXX << 1;
iCubeIndex |= bit4;
iCubeIndex |= bit5;
if (v111 == 0) iCubeIndex |= 64;
if (v011 == 0) iCubeIndex |= 128;
iCubeIndex |= bit7XXX;
}
//Save the bitmask