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Work on templatizing surface extractor.

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This commit is contained in:
David Williams 2009-06-03 21:26:54 +00:00
parent 57eed6e901
commit 324987d380
2 changed files with 66 additions and 54 deletions
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4
library/PolyVoxCore/include/SurfaceExtractor.h
View File

@ -95,8 +95,8 @@ namespace PolyVox
//void extractSurfaceForRegionLevel0(Volume<uint8_t>* volumeData, Region region, IndexedSurfacePatch* m_ispCurrent);
void extractSurfaceImpl(Region region);
uint32_t computeBitmaskForSlice(bool bIsFirstSlice);
void extractSurfaceImpl(Region region, uint8_t uLodLevel);
uint32_t computeBitmaskForSlice(bool isPrevZAvail, uint8_t uLodLevel);
void computeBitmaskForCell(bool isPrevXAvail, bool isPrevYAvail, bool isPrevZAvail, uint8_t uLodLevel);
void generateIndicesForSlice();
void generateVerticesForSlice();

116
library/PolyVoxCore/source/SurfaceExtractor.cpp
View File

@ -31,14 +31,14 @@ namespace PolyVox
//POLYVOX_SHARED_PTR<IndexedSurfacePatch> result(new IndexedSurfacePatch());
m_ispCurrent = new IndexedSurfacePatch();
extractSurfaceImpl(region);
extractSurfaceImpl(region, m_uLodLevel);
m_ispCurrent->m_Region = region;
return POLYVOX_SHARED_PTR<IndexedSurfacePatch>(m_ispCurrent);
}
void SurfaceExtractor::extractSurfaceImpl(Region region)
void SurfaceExtractor::extractSurfaceImpl(Region region, uint8_t uLodLevel)
{
m_ispCurrent->clear();
@ -79,11 +79,28 @@ namespace PolyVox
uint32_t uNoOfNonEmptyCellsForSlice0 = 0;
uint32_t uNoOfNonEmptyCellsForSlice1 = 0;
bool isFirstSliceDone = false;
//Process the first slice (previous slice not available)
computeBitmaskForSlice(false, uLodLevel);
uNoOfNonEmptyCellsForSlice1 = m_uNoOfOccupiedCells;
for(uint32_t uSlice = 0; ((uSlice <= region.depth()) && (uSlice + m_v3dRegionOffset.getZ() <= regVolume.getUpperCorner().getZ())); uSlice += m_uStepSize)
if(uNoOfNonEmptyCellsForSlice1 != 0)
{
generateVerticesForSlice();
}
std::swap(uNoOfNonEmptyCellsForSlice0, uNoOfNonEmptyCellsForSlice1);
std::swap(m_pPreviousBitmask, m_pCurrentBitmask);
std::swap(m_pPreviousVertexIndicesX, m_pCurrentVertexIndicesX);
std::swap(m_pPreviousVertexIndicesY, m_pCurrentVertexIndicesY);
std::swap(m_pPreviousVertexIndicesZ, m_pCurrentVertexIndicesZ);
regSlice0 = regSlice1;
regSlice1.shift(Vector3DInt32(0,0,m_uStepSize));
//Process the first slice (previous slice is available)
for(uint32_t uSlice = 1; ((uSlice <= region.depth()) && (uSlice + m_v3dRegionOffset.getZ() <= regVolume.getUpperCorner().getZ())); uSlice += m_uStepSize)
{
computeBitmaskForSlice(!isFirstSliceDone);
computeBitmaskForSlice(true, uLodLevel);
uNoOfNonEmptyCellsForSlice1 = m_uNoOfOccupiedCells;
if(uNoOfNonEmptyCellsForSlice1 != 0)
@ -91,12 +108,9 @@ namespace PolyVox
generateVerticesForSlice();
}
if(isFirstSliceDone)
if((uNoOfNonEmptyCellsForSlice0 != 0) || (uNoOfNonEmptyCellsForSlice1 != 0))
{
if((uNoOfNonEmptyCellsForSlice0 != 0) || (uNoOfNonEmptyCellsForSlice1 != 0))
{
generateIndicesForSlice();
}
generateIndicesForSlice();
}
std::swap(uNoOfNonEmptyCellsForSlice0, uNoOfNonEmptyCellsForSlice1);
@ -107,8 +121,6 @@ namespace PolyVox
regSlice0 = regSlice1;
regSlice1.shift(Vector3DInt32(0,0,m_uStepSize));
isFirstSliceDone = true;
}
delete[] m_pPreviousBitmask;
@ -121,7 +133,7 @@ namespace PolyVox
delete[] m_pCurrentVertexIndicesZ;
}
uint32_t SurfaceExtractor::computeBitmaskForSlice(bool bIsFirstSlice)
uint32_t SurfaceExtractor::computeBitmaskForSlice(bool isPrevZAvail, uint8_t uLodLevel)
{
m_uNoOfOccupiedCells = 0;
@ -139,7 +151,7 @@ namespace PolyVox
uYRegSpace = uYVolSpace - m_v3dRegionOffset.getY();
m_sampVolume.setPosition(uXVolSpace,uYVolSpace,uZVolSpace);
computeBitmaskForCell(false, false, !bIsFirstSlice, m_uLodLevel);
computeBitmaskForCell(false, false, isPrevZAvail, uLodLevel);
//Process the edge where x is minimal.
@ -150,7 +162,7 @@ namespace PolyVox
uYRegSpace = uYVolSpace - m_v3dRegionOffset.getY();
m_sampVolume.setPosition(uXVolSpace,uYVolSpace,uZVolSpace);
computeBitmaskForCell(false, true, !bIsFirstSlice, m_uLodLevel);
computeBitmaskForCell(false, true, isPrevZAvail, uLodLevel);
}
//Process the edge where y is minimal.
@ -161,7 +173,7 @@ namespace PolyVox
uYRegSpace = uYVolSpace - m_v3dRegionOffset.getY();
m_sampVolume.setPosition(uXVolSpace,uYVolSpace,uZVolSpace);
computeBitmaskForCell(true, false, !bIsFirstSlice, m_uLodLevel);
computeBitmaskForCell(true, false, isPrevZAvail, uLodLevel);
}
//Process all remaining elemnents of the slice. In this case, previous x and y values are always available
@ -173,7 +185,7 @@ namespace PolyVox
uYRegSpace = uYVolSpace - m_v3dRegionOffset.getY();
m_sampVolume.setPosition(uXVolSpace,uYVolSpace,uZVolSpace);
computeBitmaskForCell(true, true, !bIsFirstSlice, m_uLodLevel);
computeBitmaskForCell(true, true, isPrevZAvail, uLodLevel);
}
}
@ -190,14 +202,14 @@ namespace PolyVox
{
if(isPrevXAvail)
{
if(m_uLodLevel == 0)
if(uLodLevel == 0)
{
v111 = m_sampVolume.peekVoxel1px1py1pz();
}
else
{
m_sampVolume.setPosition(uXVolSpace+m_uStepSize,uYVolSpace+m_uStepSize,uZVolSpace+m_uStepSize);
v111 = m_sampVolume.getSubSampledVoxel(m_uLodLevel);
v111 = m_sampVolume.getSubSampledVoxel(uLodLevel);
}
//z
@ -220,7 +232,7 @@ namespace PolyVox
}
else //previous X not available
{
if(m_uLodLevel == 0)
if(uLodLevel == 0)
{
v011 = m_sampVolume.peekVoxel0px1py1pz();
v111 = m_sampVolume.peekVoxel1px1py1pz();
@ -229,9 +241,9 @@ namespace PolyVox
else
{
m_sampVolume.setPosition(uXVolSpace,uYVolSpace+m_uStepSize,uZVolSpace+m_uStepSize);
v011 = m_sampVolume.getSubSampledVoxel(m_uLodLevel);
v011 = m_sampVolume.getSubSampledVoxel(uLodLevel);
m_sampVolume.setPosition(uXVolSpace+m_uStepSize,uYVolSpace+m_uStepSize,uZVolSpace+m_uStepSize);
v111 = m_sampVolume.getSubSampledVoxel(m_uLodLevel);
v111 = m_sampVolume.getSubSampledVoxel(uLodLevel);
}
//z
@ -253,7 +265,7 @@ namespace PolyVox
{
if(isPrevXAvail)
{
if(m_uLodLevel == 0)
if(uLodLevel == 0)
{
v101 = m_sampVolume.peekVoxel1px0py1pz();
v111 = m_sampVolume.peekVoxel1px1py1pz();
@ -262,9 +274,9 @@ namespace PolyVox
else
{
m_sampVolume.setPosition(uXVolSpace+m_uStepSize,uYVolSpace,uZVolSpace+m_uStepSize);
v101 = m_sampVolume.getSubSampledVoxel(m_uLodLevel);
v101 = m_sampVolume.getSubSampledVoxel(uLodLevel);
m_sampVolume.setPosition(uXVolSpace+m_uStepSize,uYVolSpace+m_uStepSize,uZVolSpace+m_uStepSize);
v111 = m_sampVolume.getSubSampledVoxel(m_uLodLevel);
v111 = m_sampVolume.getSubSampledVoxel(uLodLevel);
}
//z
@ -283,7 +295,7 @@ namespace PolyVox
}
else //previous X not available
{
if(m_uLodLevel == 0)
if(uLodLevel == 0)
{
v001 = m_sampVolume.peekVoxel0px0py1pz();
v101 = m_sampVolume.peekVoxel1px0py1pz();
@ -293,13 +305,13 @@ namespace PolyVox
else
{
m_sampVolume.setPosition(uXVolSpace,uYVolSpace,uZVolSpace+m_uStepSize);
v001 = m_sampVolume.getSubSampledVoxel(m_uLodLevel);
v001 = m_sampVolume.getSubSampledVoxel(uLodLevel);
m_sampVolume.setPosition(uXVolSpace+m_uStepSize,uYVolSpace,uZVolSpace+m_uStepSize);
v101 = m_sampVolume.getSubSampledVoxel(m_uLodLevel);
v101 = m_sampVolume.getSubSampledVoxel(uLodLevel);
m_sampVolume.setPosition(uXVolSpace,uYVolSpace+m_uStepSize,uZVolSpace+m_uStepSize);
v011 = m_sampVolume.getSubSampledVoxel(m_uLodLevel);
v011 = m_sampVolume.getSubSampledVoxel(uLodLevel);
m_sampVolume.setPosition(uXVolSpace+m_uStepSize,uYVolSpace+m_uStepSize,uZVolSpace+m_uStepSize);
v111 = m_sampVolume.getSubSampledVoxel(m_uLodLevel);
v111 = m_sampVolume.getSubSampledVoxel(uLodLevel);
}
//z
@ -319,7 +331,7 @@ namespace PolyVox
{
if(isPrevXAvail)
{
if(m_uLodLevel == 0)
if(uLodLevel == 0)
{
v110 = m_sampVolume.peekVoxel1px1py0pz();
v111 = m_sampVolume.peekVoxel1px1py1pz();
@ -327,10 +339,10 @@ namespace PolyVox
else
{
m_sampVolume.setPosition(uXVolSpace+m_uStepSize,uYVolSpace+m_uStepSize,uZVolSpace);
v110 = m_sampVolume.getSubSampledVoxel(m_uLodLevel);
v110 = m_sampVolume.getSubSampledVoxel(uLodLevel);
m_sampVolume.setPosition(uXVolSpace+m_uStepSize,uYVolSpace+m_uStepSize,uZVolSpace+m_uStepSize);
v111 = m_sampVolume.getSubSampledVoxel(m_uLodLevel);
v111 = m_sampVolume.getSubSampledVoxel(uLodLevel);
}
//y
@ -350,7 +362,7 @@ namespace PolyVox
}
else //previous X not available
{
if(m_uLodLevel == 0)
if(uLodLevel == 0)
{
v010 = m_sampVolume.peekVoxel0px1py0pz();
v110 = m_sampVolume.peekVoxel1px1py0pz();
@ -361,14 +373,14 @@ namespace PolyVox
else
{
m_sampVolume.setPosition(uXVolSpace,uYVolSpace+m_uStepSize,uZVolSpace);
v010 = m_sampVolume.getSubSampledVoxel(m_uLodLevel);
v010 = m_sampVolume.getSubSampledVoxel(uLodLevel);
m_sampVolume.setPosition(uXVolSpace+m_uStepSize,uYVolSpace+m_uStepSize,uZVolSpace);
v110 = m_sampVolume.getSubSampledVoxel(m_uLodLevel);
v110 = m_sampVolume.getSubSampledVoxel(uLodLevel);
m_sampVolume.setPosition(uXVolSpace,uYVolSpace+m_uStepSize,uZVolSpace+m_uStepSize);
v011 = m_sampVolume.getSubSampledVoxel(m_uLodLevel);
v011 = m_sampVolume.getSubSampledVoxel(uLodLevel);
m_sampVolume.setPosition(uXVolSpace+m_uStepSize,uYVolSpace+m_uStepSize,uZVolSpace+m_uStepSize);
v111 = m_sampVolume.getSubSampledVoxel(m_uLodLevel);
v111 = m_sampVolume.getSubSampledVoxel(uLodLevel);
}
//y
@ -388,7 +400,7 @@ namespace PolyVox
{
if(isPrevXAvail)
{
if(m_uLodLevel == 0)
if(uLodLevel == 0)
{
v100 = m_sampVolume.peekVoxel1px0py0pz();
v110 = m_sampVolume.peekVoxel1px1py0pz();
@ -399,14 +411,14 @@ namespace PolyVox
else
{
m_sampVolume.setPosition(uXVolSpace+m_uStepSize,uYVolSpace,uZVolSpace);
v100 = m_sampVolume.getSubSampledVoxel(m_uLodLevel);
v100 = m_sampVolume.getSubSampledVoxel(uLodLevel);
m_sampVolume.setPosition(uXVolSpace+m_uStepSize,uYVolSpace+m_uStepSize,uZVolSpace);
v110 = m_sampVolume.getSubSampledVoxel(m_uLodLevel);
v110 = m_sampVolume.getSubSampledVoxel(uLodLevel);
m_sampVolume.setPosition(uXVolSpace+m_uStepSize,uYVolSpace,uZVolSpace+m_uStepSize);
v101 = m_sampVolume.getSubSampledVoxel(m_uLodLevel);
v101 = m_sampVolume.getSubSampledVoxel(uLodLevel);
m_sampVolume.setPosition(uXVolSpace+m_uStepSize,uYVolSpace+m_uStepSize,uZVolSpace+m_uStepSize);
v111 = m_sampVolume.getSubSampledVoxel(m_uLodLevel);
v111 = m_sampVolume.getSubSampledVoxel(uLodLevel);
}
//x
@ -423,7 +435,7 @@ namespace PolyVox
}
else //previous X not available
{
if(m_uLodLevel == 0)
if(uLodLevel == 0)
{
v000 = m_sampVolume.getVoxel();
v100 = m_sampVolume.peekVoxel1px0py0pz();
@ -438,22 +450,22 @@ namespace PolyVox
else
{
m_sampVolume.setPosition(uXVolSpace,uYVolSpace,uZVolSpace);
v000 = m_sampVolume.getSubSampledVoxel(m_uLodLevel);
v000 = m_sampVolume.getSubSampledVoxel(uLodLevel);
m_sampVolume.setPosition(uXVolSpace+m_uStepSize,uYVolSpace,uZVolSpace);
v100 = m_sampVolume.getSubSampledVoxel(m_uLodLevel);
v100 = m_sampVolume.getSubSampledVoxel(uLodLevel);
m_sampVolume.setPosition(uXVolSpace,uYVolSpace+m_uStepSize,uZVolSpace);
v010 = m_sampVolume.getSubSampledVoxel(m_uLodLevel);
v010 = m_sampVolume.getSubSampledVoxel(uLodLevel);
m_sampVolume.setPosition(uXVolSpace+m_uStepSize,uYVolSpace+m_uStepSize,uZVolSpace);
v110 = m_sampVolume.getSubSampledVoxel(m_uLodLevel);
v110 = m_sampVolume.getSubSampledVoxel(uLodLevel);
m_sampVolume.setPosition(uXVolSpace,uYVolSpace,uZVolSpace+m_uStepSize);
v001 = m_sampVolume.getSubSampledVoxel(m_uLodLevel);
v001 = m_sampVolume.getSubSampledVoxel(uLodLevel);
m_sampVolume.setPosition(uXVolSpace+m_uStepSize,uYVolSpace,uZVolSpace+m_uStepSize);
v101 = m_sampVolume.getSubSampledVoxel(m_uLodLevel);
v101 = m_sampVolume.getSubSampledVoxel(uLodLevel);
m_sampVolume.setPosition(uXVolSpace,uYVolSpace+m_uStepSize,uZVolSpace+m_uStepSize);
v011 = m_sampVolume.getSubSampledVoxel(m_uLodLevel);
v011 = m_sampVolume.getSubSampledVoxel(uLodLevel);
m_sampVolume.setPosition(uXVolSpace+m_uStepSize,uYVolSpace+m_uStepSize,uZVolSpace+m_uStepSize);
v111 = m_sampVolume.getSubSampledVoxel(m_uLodLevel);
v111 = m_sampVolume.getSubSampledVoxel(uLodLevel);
}
if (v000 == 0) iCubeIndex |= 1;