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Work on templatizing surface extractor.

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This commit is contained in:
David Williams 2009-06-03 21:48:26 +00:00
parent 324987d380
commit 4f9c93a454
3 changed files with 37 additions and 14 deletions
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2
examples/OpenGL/OpenGLWidget.cpp
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@ -38,7 +38,7 @@ void OpenGLWidget::setVolume(PolyVox::Volume<PolyVox::uint8_t>* volData)
m_uVolumeDepthInRegions = volData->getDepth() / m_uRegionSideLength;
SurfaceExtractor surfaceExtractor(*volData);
surfaceExtractor.setLodLevel(0);
surfaceExtractor.setLodLevel(1);
//Our volume is broken down into cuboid regions, and we create one mesh for each region.
//This three-level for loop iterates over each region.

14
library/PolyVoxCore/include/SurfaceExtractor.h
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@ -92,12 +92,20 @@ namespace PolyVox
Region regSlice1;
uint16_t m_uRegionWidth;
//uint16_t m_uRegionWidthOverStepSize;
//uint16_t m_uRegionHeightOverStepSize;
//void extractSurfaceForRegionLevel0(Volume<uint8_t>* volumeData, Region region, IndexedSurfacePatch* m_ispCurrent);
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);
template<uint8_t uLodLevel>
void extractSurfaceImpl(Region region);
template<bool isPrevZAvail, uint8_t uLodLevel>
uint32_t computeBitmaskForSlice(void);
template<bool isPrevXAvail, bool isPrevYAvail, bool isPrevZAvail, uint8_t uLodLevel>
void computeBitmaskForCell(void);
void generateIndicesForSlice();
void generateVerticesForSlice();
};

35
library/PolyVoxCore/source/SurfaceExtractor.cpp
View File

@ -31,14 +31,27 @@ namespace PolyVox
//POLYVOX_SHARED_PTR<IndexedSurfacePatch> result(new IndexedSurfacePatch());
m_ispCurrent = new IndexedSurfacePatch();
extractSurfaceImpl(region, m_uLodLevel);
switch(m_uLodLevel)
{
case 0:
extractSurfaceImpl<0>(region);
break;
case 1:
extractSurfaceImpl<1>(region);
break;
case 2:
extractSurfaceImpl<2>(region);
break;
}
m_ispCurrent->m_Region = region;
return POLYVOX_SHARED_PTR<IndexedSurfacePatch>(m_ispCurrent);
}
void SurfaceExtractor::extractSurfaceImpl(Region region, uint8_t uLodLevel)
template<uint8_t uLodLevel>
void SurfaceExtractor::extractSurfaceImpl(Region region)
{
m_ispCurrent->clear();
@ -80,7 +93,7 @@ namespace PolyVox
uint32_t uNoOfNonEmptyCellsForSlice1 = 0;
//Process the first slice (previous slice not available)
computeBitmaskForSlice(false, uLodLevel);
computeBitmaskForSlice<false, uLodLevel>();
uNoOfNonEmptyCellsForSlice1 = m_uNoOfOccupiedCells;
if(uNoOfNonEmptyCellsForSlice1 != 0)
@ -100,7 +113,7 @@ namespace PolyVox
//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(true, uLodLevel);
computeBitmaskForSlice<true, uLodLevel>();
uNoOfNonEmptyCellsForSlice1 = m_uNoOfOccupiedCells;
if(uNoOfNonEmptyCellsForSlice1 != 0)
@ -133,7 +146,8 @@ namespace PolyVox
delete[] m_pCurrentVertexIndicesZ;
}
uint32_t SurfaceExtractor::computeBitmaskForSlice(bool isPrevZAvail, uint8_t uLodLevel)
template<bool isPrevZAvail, uint8_t uLodLevel>
uint32_t SurfaceExtractor::computeBitmaskForSlice(void)
{
m_uNoOfOccupiedCells = 0;
@ -151,7 +165,7 @@ namespace PolyVox
uYRegSpace = uYVolSpace - m_v3dRegionOffset.getY();
m_sampVolume.setPosition(uXVolSpace,uYVolSpace,uZVolSpace);
computeBitmaskForCell(false, false, isPrevZAvail, uLodLevel);
computeBitmaskForCell<false, false, isPrevZAvail, uLodLevel>();
//Process the edge where x is minimal.
@ -162,7 +176,7 @@ namespace PolyVox
uYRegSpace = uYVolSpace - m_v3dRegionOffset.getY();
m_sampVolume.setPosition(uXVolSpace,uYVolSpace,uZVolSpace);
computeBitmaskForCell(false, true, isPrevZAvail, uLodLevel);
computeBitmaskForCell<false, true, isPrevZAvail, uLodLevel>();
}
//Process the edge where y is minimal.
@ -173,7 +187,7 @@ namespace PolyVox
uYRegSpace = uYVolSpace - m_v3dRegionOffset.getY();
m_sampVolume.setPosition(uXVolSpace,uYVolSpace,uZVolSpace);
computeBitmaskForCell(true, false, isPrevZAvail, uLodLevel);
computeBitmaskForCell<true, false, isPrevZAvail, uLodLevel>();
}
//Process all remaining elemnents of the slice. In this case, previous x and y values are always available
@ -185,14 +199,15 @@ namespace PolyVox
uYRegSpace = uYVolSpace - m_v3dRegionOffset.getY();
m_sampVolume.setPosition(uXVolSpace,uYVolSpace,uZVolSpace);
computeBitmaskForCell(true, true, isPrevZAvail, uLodLevel);
computeBitmaskForCell<true, true, isPrevZAvail, uLodLevel>();
}
}
return m_uNoOfOccupiedCells;
}
void SurfaceExtractor::computeBitmaskForCell(bool isPrevXAvail, bool isPrevYAvail, bool isPrevZAvail, uint8_t uLodLevel)
template<bool isPrevXAvail, bool isPrevYAvail, bool isPrevZAvail, uint8_t uLodLevel>
void SurfaceExtractor::computeBitmaskForCell(void)
{
uint8_t iCubeIndex = 0;