Initial checkin of new surface extractor.
This commit is contained in:
David Williams
parent
85829e004f
commit
c1737416a6
@ -9,7 +9,8 @@ SET(CORE_SRC_FILES
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source/Log.cpp
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source/Region.cpp
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source/SurfaceAdjusters.cpp
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source/SurfaceExtractors.cpp
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source/SurfaceExtractor.cpp
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source/SurfaceExtractors.cpp
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source/SurfaceVertex.cpp
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source/VoxelFilters.cpp
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)
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@ -22,6 +23,7 @@ SET(CORE_INC_FILES
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include/PolyVoxForwardDeclarations.h
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include/Region.h
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include/SurfaceAdjusters.h
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include/SurfaceExtractor.h
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include/SurfaceExtractors.h
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include/SurfaceVertex.h
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include/Vector.h
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61
library/PolyVoxCore/include/SurfaceExtractor.h
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61
library/PolyVoxCore/include/SurfaceExtractor.h
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@ -0,0 +1,61 @@
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#pragma region License
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/******************************************************************************
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This file is part of the PolyVox library
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Copyright (C) 2006 David Williams
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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******************************************************************************/
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#pragma endregion
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#ifndef __PolyVox_SurfaceExtractor_H__
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#define __PolyVox_SurfaceExtractor_H__
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#pragma region Headers
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#include "PolyVoxForwardDeclarations.h"
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#include "VolumeIterator.h"
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#include "PolyVoxImpl/TypeDef.h"
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#include "PolyVoxImpl/CPlusPlusZeroXSupport.h"
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#pragma endregion
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namespace PolyVox
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{
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class POLYVOXCORE_API SurfaceExtractor
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{
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public:
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SurfaceExtractor(Volume<uint8_t>& volData);
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uint8_t getLodLevel(void);
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void setLodLevel(uint8_t uLodLevel);
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void extractSurfaceForRegion(Region region, IndexedSurfacePatch* singleMaterialPatch);
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private:
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uint8_t m_uLodLevel;
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Volume<uint8_t> m_volData;
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VolumeIterator<uint8_t> m_iterVolume;
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uint32_t getIndex(uint32_t x, uint32_t y, uint32_t regionWidth);
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void extractFastSurfaceImpl(Volume<uint8_t>* volumeData, Region region, IndexedSurfacePatch* singleMaterialPatch);
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uint32_t computeRoughBitmaskForSlice(VolumeIterator<uint8_t>& volIter, const Region& regSlice, const Vector3DFloat& offset, uint8_t *bitmask, uint8_t *previousBitmask);
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void generateRoughIndicesForSlice(VolumeIterator<uint8_t>& volIter, const Region& regSlice, IndexedSurfacePatch* singleMaterialPatch, const Vector3DFloat& offset, uint8_t* bitmask0, uint8_t* bitmask1, int32_t vertexIndicesX0[],int32_t vertexIndicesY0[],int32_t vertexIndicesZ0[], int32_t vertexIndicesX1[],int32_t vertexIndicesY1[],int32_t vertexIndicesZ1[]);
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void generateRoughVerticesForSlice(VolumeIterator<uint8_t>& volIter, Region& regSlice, const Vector3DFloat& offset, uint8_t* bitmask, IndexedSurfacePatch* singleMaterialPatch,int32_t vertexIndicesX[],int32_t vertexIndicesY[],int32_t vertexIndicesZ[]);
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};
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}
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#endif
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538
library/PolyVoxCore/source/SurfaceExtractor.cpp
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538
library/PolyVoxCore/source/SurfaceExtractor.cpp
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@ -0,0 +1,538 @@
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#include "SurfaceExtractor.h"
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#include "IndexedSurfacePatch.h"
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#include "PolyVoxImpl/MarchingCubesTables.h"
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#include "SurfaceVertex.h"
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namespace PolyVox
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{
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SurfaceExtractor::SurfaceExtractor(Volume<uint8_t>& volData)
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:m_uLodLevel(0)
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,m_volData(volData)
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,m_iterVolume(volData)
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{
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}
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uint8_t SurfaceExtractor::getLodLevel(void)
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{
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return m_uLodLevel;
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}
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void SurfaceExtractor::setLodLevel(uint8_t uLodLevel)
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{
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m_uLodLevel = uLodLevel;
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}
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void SurfaceExtractor::extractSurfaceForRegion(Region region, IndexedSurfacePatch* singleMaterialPatch)
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{
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extractFastSurfaceImpl(&m_volData, region, singleMaterialPatch);
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singleMaterialPatch->m_v3dRegionPosition = region.getLowerCorner();
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}
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void SurfaceExtractor::extractFastSurfaceImpl(Volume<uint8_t>* volumeData, Region region, IndexedSurfacePatch* singleMaterialPatch)
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{
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singleMaterialPatch->clear();
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//For edge indices
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int32_t* vertexIndicesX0 = new int32_t[(region.width()+2) * (region.height()+2)];
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int32_t* vertexIndicesY0 = new int32_t[(region.width()+2) * (region.height()+2)];
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int32_t* vertexIndicesZ0 = new int32_t[(region.width()+2) * (region.height()+2)];
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int32_t* vertexIndicesX1 = new int32_t[(region.width()+2) * (region.height()+2)];
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int32_t* vertexIndicesY1 = new int32_t[(region.width()+2) * (region.height()+2)];
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int32_t* vertexIndicesZ1 = new int32_t[(region.width()+2) * (region.height()+2)];
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//Cell bitmasks
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uint8_t* bitmask0 = new uint8_t[(region.width()+2) * (region.height()+2)];
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uint8_t* bitmask1 = new uint8_t[(region.width()+2) * (region.height()+2)];
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//When generating the mesh for a region we actually look one voxel outside it in the
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// back, bottom, right direction. Protect against access violations by cropping region here
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Region regVolume = volumeData->getEnclosingRegion();
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//regVolume.setUpperCorner(regVolume.getUpperCorner() - Vector3DInt32(1,1,1));
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region.cropTo(regVolume);
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//Offset from volume corner
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const Vector3DFloat offset = static_cast<Vector3DFloat>(region.getLowerCorner());
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//Create a region corresponding to the first slice
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Region regSlice0(region);
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regSlice0.setUpperCorner(Vector3DInt32(regSlice0.getUpperCorner().getX(),regSlice0.getUpperCorner().getY(),regSlice0.getLowerCorner().getZ()));
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//Iterator to access the volume data
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VolumeIterator<uint8_t> volIter(*volumeData);
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//Compute bitmask for initial slice
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uint32_t uNoOfNonEmptyCellsForSlice0 = computeRoughBitmaskForSlice(volIter, regSlice0, offset, bitmask0, 0);
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if(uNoOfNonEmptyCellsForSlice0 != 0)
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{
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//If there were some non-empty cells then generate initial slice vertices for them
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generateRoughVerticesForSlice(volIter,regSlice0, offset, bitmask0, singleMaterialPatch, vertexIndicesX0, vertexIndicesY0, vertexIndicesZ0);
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}
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for(uint32_t uSlice = 0; ((uSlice < region.depth()) && (uSlice + offset.getZ() < region.getUpperCorner().getZ())); ++uSlice)
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{
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Region regSlice1(regSlice0);
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regSlice1.shift(Vector3DInt32(0,0,1));
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uint32_t uNoOfNonEmptyCellsForSlice1 = computeRoughBitmaskForSlice(volIter, regSlice1, offset, bitmask1, bitmask0);
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if(uNoOfNonEmptyCellsForSlice1 != 0)
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{
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generateRoughVerticesForSlice(volIter,regSlice1, offset, bitmask1, singleMaterialPatch, vertexIndicesX1, vertexIndicesY1, vertexIndicesZ1);
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}
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if((uNoOfNonEmptyCellsForSlice0 != 0) || (uNoOfNonEmptyCellsForSlice1 != 0))
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{
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generateRoughIndicesForSlice(volIter, regSlice0, singleMaterialPatch, offset, bitmask0, bitmask1, vertexIndicesX0, vertexIndicesY0, vertexIndicesZ0, vertexIndicesX1, vertexIndicesY1, vertexIndicesZ1);
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}
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std::swap(uNoOfNonEmptyCellsForSlice0, uNoOfNonEmptyCellsForSlice1);
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std::swap(bitmask0, bitmask1);
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std::swap(vertexIndicesX0, vertexIndicesX1);
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std::swap(vertexIndicesY0, vertexIndicesY1);
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std::swap(vertexIndicesZ0, vertexIndicesZ1);
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regSlice0 = regSlice1;
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}
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delete[] bitmask0;
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delete[] bitmask1;
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delete[] vertexIndicesX0;
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delete[] vertexIndicesX1;
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delete[] vertexIndicesY0;
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delete[] vertexIndicesY1;
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delete[] vertexIndicesZ0;
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delete[] vertexIndicesZ1;
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}
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uint32_t SurfaceExtractor::getIndex(uint32_t x, uint32_t y, uint32_t regionWidth)
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{
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return x + (y * (regionWidth+1));
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}
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uint32_t SurfaceExtractor::computeRoughBitmaskForSlice(VolumeIterator<uint8_t>& volIter, const Region& regSlice, const Vector3DFloat& offset, uint8_t* bitmask, uint8_t* previousBitmask)
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{
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uint32_t uNoOfNonEmptyCells = 0;
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//Iterate over each cell in the region
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for(uint16_t uYVolSpace = regSlice.getLowerCorner().getY(); uYVolSpace <= regSlice.getUpperCorner().getY(); uYVolSpace++)
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{
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for(uint16_t uXVolSpace = regSlice.getLowerCorner().getX(); uXVolSpace <= regSlice.getUpperCorner().getX(); uXVolSpace++)
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{
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uint16_t uZVolSpace = regSlice.getLowerCorner().getZ();
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volIter.setPosition(uXVolSpace,uYVolSpace,uZVolSpace);
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//Current position
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const uint16_t uXRegSpace = volIter.getPosX() - offset.getX();
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const uint16_t uYRegSpace = volIter.getPosY() - offset.getY();
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//Determine the index into the edge table which tells us which vertices are inside of the surface
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uint8_t iCubeIndex = 0;
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if((uXVolSpace < volIter.getVolume().getWidth()-1) &&
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(uYVolSpace < volIter.getVolume().getHeight()-1) &&
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(uZVolSpace < volIter.getVolume().getDepth()-1))
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{
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bool isPrevXAvail = uXRegSpace > 0;
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bool isPrevYAvail = uYRegSpace > 0;
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bool isPrevZAvail = previousBitmask != 0;
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if(isPrevZAvail)
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{
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if(isPrevYAvail)
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{
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if(isPrevXAvail)
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{
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const uint8_t v111 = volIter.peekVoxel1px1py1pz();
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//z
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uint8_t iPreviousCubeIndexZ = previousBitmask[getIndex(uXRegSpace,uYRegSpace, regSlice.width()+1)];
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iPreviousCubeIndexZ >>= 4;
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//y
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uint8_t iPreviousCubeIndexY = bitmask[getIndex(uXRegSpace,uYRegSpace-1, regSlice.width()+1)];
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iPreviousCubeIndexY &= 204; //204 = 128+64+8+4
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iPreviousCubeIndexY >>= 2;
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//x
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uint8_t iPreviousCubeIndexX = bitmask[getIndex(uXRegSpace-1,uYRegSpace, regSlice.width()+1)];
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iPreviousCubeIndexX &= 170; //170 = 128+32+8+2
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iPreviousCubeIndexX >>= 1;
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iCubeIndex = iPreviousCubeIndexX | iPreviousCubeIndexY | iPreviousCubeIndexZ;
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if (v111 == 0) iCubeIndex |= 128;
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}
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else //previous X not available
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{
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const uint8_t v011 = volIter.peekVoxel0px1py1pz();
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const uint8_t v111 = volIter.peekVoxel1px1py1pz();
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//z
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uint8_t iPreviousCubeIndexZ = previousBitmask[getIndex(uXRegSpace,uYRegSpace, regSlice.width()+1)];
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iPreviousCubeIndexZ >>= 4;
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//y
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uint8_t iPreviousCubeIndexY = bitmask[getIndex(uXRegSpace,uYRegSpace-1, regSlice.width()+1)];
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iPreviousCubeIndexY &= 192; //192 = 128 + 64
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iPreviousCubeIndexY >>= 2;
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iCubeIndex = iPreviousCubeIndexY | iPreviousCubeIndexZ;
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if (v011 == 0) iCubeIndex |= 64;
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if (v111 == 0) iCubeIndex |= 128;
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}
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}
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else //previous Y not available
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{
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if(isPrevXAvail)
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{
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const uint8_t v101 = volIter.peekVoxel1px0py1pz();
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const uint8_t v111 = volIter.peekVoxel1px1py1pz();
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//z
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uint8_t iPreviousCubeIndexZ = previousBitmask[getIndex(uXRegSpace,uYRegSpace, regSlice.width()+1)];
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iPreviousCubeIndexZ >>= 4;
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//x
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uint8_t iPreviousCubeIndexX = bitmask[getIndex(uXRegSpace-1,uYRegSpace, regSlice.width()+1)];
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iPreviousCubeIndexX &= 160; //160 = 128+32
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iPreviousCubeIndexX >>= 1;
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iCubeIndex = iPreviousCubeIndexX | iPreviousCubeIndexZ;
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if (v101 == 0) iCubeIndex |= 32;
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if (v111 == 0) iCubeIndex |= 128;
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}
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else //previous X not available
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{
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const uint8_t v001 = volIter.peekVoxel0px0py1pz();
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const uint8_t v101 = volIter.peekVoxel1px0py1pz();
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const uint8_t v011 = volIter.peekVoxel0px1py1pz();
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const uint8_t v111 = volIter.peekVoxel1px1py1pz();
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//z
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uint8_t iPreviousCubeIndexZ = previousBitmask[getIndex(uXRegSpace,uYRegSpace, regSlice.width()+1)];
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iCubeIndex = iPreviousCubeIndexZ >> 4;
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if (v001 == 0) iCubeIndex |= 16;
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if (v101 == 0) iCubeIndex |= 32;
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if (v011 == 0) iCubeIndex |= 64;
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if (v111 == 0) iCubeIndex |= 128;
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}
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}
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}
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else //previous Z not available
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{
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if(isPrevYAvail)
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{
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if(isPrevXAvail)
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{
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const uint8_t v110 = volIter.peekVoxel1px1py0pz();
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const uint8_t v111 = volIter.peekVoxel1px1py1pz();
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//y
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uint8_t iPreviousCubeIndexY = bitmask[getIndex(uXRegSpace,uYRegSpace-1, regSlice.width()+1)];
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iPreviousCubeIndexY &= 204; //204 = 128+64+8+4
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iPreviousCubeIndexY >>= 2;
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//x
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uint8_t iPreviousCubeIndexX = bitmask[getIndex(uXRegSpace-1,uYRegSpace, regSlice.width()+1)];
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iPreviousCubeIndexX &= 170; //170 = 128+32+8+2
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iPreviousCubeIndexX >>= 1;
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iCubeIndex = iPreviousCubeIndexX | iPreviousCubeIndexY;
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if (v110 == 0) iCubeIndex |= 8;
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if (v111 == 0) iCubeIndex |= 128;
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}
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else //previous X not available
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{
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const uint8_t v010 = volIter.peekVoxel0px1py0pz();
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const uint8_t v110 = volIter.peekVoxel1px1py0pz();
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const uint8_t v011 = volIter.peekVoxel0px1py1pz();
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const uint8_t v111 = volIter.peekVoxel1px1py1pz();
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//y
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uint8_t iPreviousCubeIndexY = bitmask[getIndex(uXRegSpace,uYRegSpace-1, regSlice.width()+1)];
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iPreviousCubeIndexY &= 204; //204 = 128+64+8+4
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iPreviousCubeIndexY >>= 2;
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iCubeIndex = iPreviousCubeIndexY;
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if (v010 == 0) iCubeIndex |= 4;
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if (v110 == 0) iCubeIndex |= 8;
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if (v011 == 0) iCubeIndex |= 64;
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if (v111 == 0) iCubeIndex |= 128;
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}
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}
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else //previous Y not available
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{
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if(isPrevXAvail)
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{
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const uint8_t v100 = volIter.peekVoxel1px0py0pz();
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const uint8_t v110 = volIter.peekVoxel1px1py0pz();
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const uint8_t v101 = volIter.peekVoxel1px0py1pz();
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const uint8_t v111 = volIter.peekVoxel1px1py1pz();
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//x
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uint8_t iPreviousCubeIndexX = bitmask[getIndex(uXRegSpace-1,uYRegSpace, regSlice.width()+1)];
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iPreviousCubeIndexX &= 170; //170 = 128+32+8+2
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iPreviousCubeIndexX >>= 1;
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iCubeIndex = iPreviousCubeIndexX;
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if (v100 == 0) iCubeIndex |= 2;
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if (v110 == 0) iCubeIndex |= 8;
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if (v101 == 0) iCubeIndex |= 32;
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if (v111 == 0) iCubeIndex |= 128;
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}
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else //previous X not available
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{
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const uint8_t v000 = volIter.getVoxel();
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const uint8_t v100 = volIter.peekVoxel1px0py0pz();
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const uint8_t v010 = volIter.peekVoxel0px1py0pz();
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const uint8_t v110 = volIter.peekVoxel1px1py0pz();
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const uint8_t v001 = volIter.peekVoxel0px0py1pz();
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const uint8_t v101 = volIter.peekVoxel1px0py1pz();
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const uint8_t v011 = volIter.peekVoxel0px1py1pz();
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const uint8_t v111 = volIter.peekVoxel1px1py1pz();
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if (v000 == 0) iCubeIndex |= 1;
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if (v100 == 0) iCubeIndex |= 2;
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if (v010 == 0) iCubeIndex |= 4;
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if (v110 == 0) iCubeIndex |= 8;
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if (v001 == 0) iCubeIndex |= 16;
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if (v101 == 0) iCubeIndex |= 32;
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if (v011 == 0) iCubeIndex |= 64;
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if (v111 == 0) iCubeIndex |= 128;
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}
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}
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}
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}
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else //We're at the edge of the volume - use bounds checking.
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{
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const uint8_t v000 = volIter.getVoxel();
|
||||
const uint8_t v100 = volIter.getVolume().getVoxelAtWithBoundCheck(uXVolSpace+1, uYVolSpace , uZVolSpace );
|
||||
const uint8_t v010 = volIter.getVolume().getVoxelAtWithBoundCheck(uXVolSpace , uYVolSpace+1, uZVolSpace );
|
||||
const uint8_t v110 = volIter.getVolume().getVoxelAtWithBoundCheck(uXVolSpace+1, uYVolSpace+1, uZVolSpace );
|
||||
|
||||
const uint8_t v001 = volIter.getVolume().getVoxelAtWithBoundCheck(uXVolSpace , uYVolSpace , uZVolSpace+1);
|
||||
const uint8_t v101 = volIter.getVolume().getVoxelAtWithBoundCheck(uXVolSpace+1, uYVolSpace , uZVolSpace+1);
|
||||
const uint8_t v011 = volIter.getVolume().getVoxelAtWithBoundCheck(uXVolSpace , uYVolSpace+1, uZVolSpace+1);
|
||||
const uint8_t v111 = volIter.getVolume().getVoxelAtWithBoundCheck(uXVolSpace+1, uYVolSpace+1, uZVolSpace+1);
|
||||
|
||||
if (v000 == 0) iCubeIndex |= 1;
|
||||
if (v100 == 0) iCubeIndex |= 2;
|
||||
if (v010 == 0) iCubeIndex |= 4;
|
||||
if (v110 == 0) iCubeIndex |= 8;
|
||||
if (v001 == 0) iCubeIndex |= 16;
|
||||
if (v101 == 0) iCubeIndex |= 32;
|
||||
if (v011 == 0) iCubeIndex |= 64;
|
||||
if (v111 == 0) iCubeIndex |= 128;
|
||||
}
|
||||
|
||||
//Save the bitmask
|
||||
bitmask[getIndex(uXRegSpace,uYRegSpace, regSlice.width()+1)] = iCubeIndex;
|
||||
|
||||
if(edgeTable[iCubeIndex] != 0)
|
||||
{
|
||||
++uNoOfNonEmptyCells;
|
||||
}
|
||||
|
||||
}
|
||||
}
|
||||
|
||||
return uNoOfNonEmptyCells;
|
||||
}
|
||||
|
||||
void SurfaceExtractor::generateRoughVerticesForSlice(VolumeIterator<uint8_t>& volIter, Region& regSlice, const Vector3DFloat& offset, uint8_t* bitmask, IndexedSurfacePatch* singleMaterialPatch,int32_t vertexIndicesX[],int32_t vertexIndicesY[],int32_t vertexIndicesZ[])
|
||||
{
|
||||
//Iterate over each cell in the region
|
||||
for(uint16_t uYVolSpace = regSlice.getLowerCorner().getY(); uYVolSpace <= regSlice.getUpperCorner().getY(); uYVolSpace++)
|
||||
{
|
||||
for(uint16_t uXVolSpace = regSlice.getLowerCorner().getX(); uXVolSpace <= regSlice.getUpperCorner().getX(); uXVolSpace++)
|
||||
{
|
||||
uint16_t uZVolSpace = regSlice.getLowerCorner().getZ();
|
||||
volIter.setPosition(uXVolSpace,uYVolSpace,uZVolSpace);
|
||||
|
||||
//Current position
|
||||
const uint16_t uXRegSpace = volIter.getPosX() - offset.getX();
|
||||
const uint16_t uYRegSpace = volIter.getPosY() - offset.getY();
|
||||
const uint16_t uZRegSpace = volIter.getPosZ() - offset.getZ();
|
||||
|
||||
const uint8_t v000 = volIter.getVoxel();
|
||||
|
||||
//Determine the index into the edge table which tells us which vertices are inside of the surface
|
||||
uint8_t iCubeIndex = bitmask[getIndex(uXRegSpace,uYRegSpace, regSlice.width()+1)];
|
||||
|
||||
/* Cube is entirely in/out of the surface */
|
||||
if (edgeTable[iCubeIndex] == 0)
|
||||
{
|
||||
continue;
|
||||
}
|
||||
|
||||
/* Find the vertices where the surface intersects the cube */
|
||||
if (edgeTable[iCubeIndex] & 1)
|
||||
{
|
||||
if((uXRegSpace + offset.getX()) != regSlice.getUpperCorner().getX())
|
||||
{
|
||||
const uint8_t v100 = volIter.peekVoxel1px0py0pz();
|
||||
const Vector3DFloat v3dPosition(uXRegSpace + 0.5f, uYRegSpace, uZRegSpace);
|
||||
const Vector3DFloat v3dNormal(v000 > v100 ? 1.0f : -1.0f, 0.0f, 0.0f);
|
||||
const uint8_t uMaterial = v000 | v100; //Because one of these is 0, the or operation takes the max.
|
||||
const SurfaceVertex surfaceVertex(v3dPosition, v3dNormal, uMaterial);
|
||||
uint32_t uLastVertexIndex = singleMaterialPatch->addVertex(surfaceVertex);
|
||||
vertexIndicesX[getIndex(uXRegSpace,uYRegSpace, regSlice.width()+1)] = uLastVertexIndex;
|
||||
}
|
||||
}
|
||||
if (edgeTable[iCubeIndex] & 8)
|
||||
{
|
||||
if((uYRegSpace + offset.getY()) != regSlice.getUpperCorner().getY())
|
||||
{
|
||||
const uint8_t v010 = volIter.peekVoxel0px1py0pz();
|
||||
const Vector3DFloat v3dPosition(uXRegSpace, uYRegSpace + 0.5f, uZRegSpace);
|
||||
const Vector3DFloat v3dNormal(0.0f, v000 > v010 ? 1.0f : -1.0f, 0.0f);
|
||||
const uint8_t uMaterial = v000 | v010;
|
||||
SurfaceVertex surfaceVertex(v3dPosition, v3dNormal, uMaterial);
|
||||
uint32_t uLastVertexIndex = singleMaterialPatch->addVertex(surfaceVertex);
|
||||
vertexIndicesY[getIndex(uXRegSpace,uYRegSpace, regSlice.width()+1)] = uLastVertexIndex;
|
||||
}
|
||||
}
|
||||
if (edgeTable[iCubeIndex] & 256)
|
||||
{
|
||||
uint8_t v001;
|
||||
if((uZRegSpace + offset.getZ()) != regSlice.getUpperCorner().getZ())
|
||||
{
|
||||
v001 = volIter.peekVoxel0px0py1pz();
|
||||
}
|
||||
else
|
||||
{
|
||||
v001 = volIter.getVolume().getVoxelAtWithBoundCheck(uXVolSpace,uYVolSpace,uZVolSpace+1);
|
||||
}
|
||||
const Vector3DFloat v3dPosition(uXRegSpace, uYRegSpace, uZRegSpace + 0.5f);
|
||||
const Vector3DFloat v3dNormal(0.0f, 0.0f, v000 > v001 ? 1.0f : -1.0f);
|
||||
const uint8_t uMaterial = v000 | v001;
|
||||
SurfaceVertex surfaceVertex(v3dPosition, v3dNormal, uMaterial);
|
||||
uint32_t uLastVertexIndex = singleMaterialPatch->addVertex(surfaceVertex);
|
||||
vertexIndicesZ[getIndex(uXRegSpace,uYRegSpace, regSlice.width()+1)] = uLastVertexIndex;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
void SurfaceExtractor::generateRoughIndicesForSlice(VolumeIterator<uint8_t>& volIter, const Region& regSlice, IndexedSurfacePatch* singleMaterialPatch, const Vector3DFloat& offset, uint8_t* bitmask0, uint8_t* bitmask1, int32_t vertexIndicesX0[],int32_t vertexIndicesY0[],int32_t vertexIndicesZ0[], int32_t vertexIndicesX1[],int32_t vertexIndicesY1[],int32_t vertexIndicesZ1[])
|
||||
{
|
||||
uint32_t indlist[12];
|
||||
|
||||
//Iterate over each cell in the region
|
||||
for(uint16_t uYVolSpace = regSlice.getLowerCorner().getY(); uYVolSpace < regSlice.getUpperCorner().getY(); uYVolSpace++)
|
||||
{
|
||||
for(uint16_t uXVolSpace = regSlice.getLowerCorner().getX(); uXVolSpace < regSlice.getUpperCorner().getX(); uXVolSpace++)
|
||||
{
|
||||
uint16_t uZVolSpace = regSlice.getLowerCorner().getZ();
|
||||
volIter.setPosition(uXVolSpace,uYVolSpace,uZVolSpace);
|
||||
|
||||
//Current position
|
||||
const uint16_t uXRegSpace = volIter.getPosX() - offset.getX();
|
||||
const uint16_t uYRegSpace = volIter.getPosY() - offset.getY();
|
||||
const uint16_t uZRegSpace = volIter.getPosZ() - offset.getZ();
|
||||
|
||||
//Determine the index into the edge table which tells us which vertices are inside of the surface
|
||||
uint8_t iCubeIndex = bitmask0[getIndex(uXRegSpace,uYRegSpace, regSlice.width()+1)];
|
||||
|
||||
/* Cube is entirely in/out of the surface */
|
||||
if (edgeTable[iCubeIndex] == 0)
|
||||
{
|
||||
continue;
|
||||
}
|
||||
|
||||
/* Find the vertices where the surface intersects the cube */
|
||||
if (edgeTable[iCubeIndex] & 1)
|
||||
{
|
||||
indlist[0] = vertexIndicesX0[getIndex(uXRegSpace,uYRegSpace, regSlice.width()+1)];
|
||||
assert(indlist[0] != -1);
|
||||
assert(indlist[0] < 10000);
|
||||
}
|
||||
if (edgeTable[iCubeIndex] & 2)
|
||||
{
|
||||
indlist[1] = vertexIndicesY0[getIndex(uXRegSpace+1,uYRegSpace, regSlice.width()+1)];
|
||||
assert(indlist[1] != -1);
|
||||
assert(indlist[1] < 10000);
|
||||
}
|
||||
if (edgeTable[iCubeIndex] & 4)
|
||||
{
|
||||
indlist[2] = vertexIndicesX0[getIndex(uXRegSpace,uYRegSpace+1, regSlice.width()+1)];
|
||||
assert(indlist[2] != -1);
|
||||
assert(indlist[2] < 10000);
|
||||
}
|
||||
if (edgeTable[iCubeIndex] & 8)
|
||||
{
|
||||
indlist[3] = vertexIndicesY0[getIndex(uXRegSpace,uYRegSpace, regSlice.width()+1)];
|
||||
assert(indlist[3] != -1);
|
||||
assert(indlist[3] < 10000);
|
||||
}
|
||||
if (edgeTable[iCubeIndex] & 16)
|
||||
{
|
||||
indlist[4] = vertexIndicesX1[getIndex(uXRegSpace,uYRegSpace, regSlice.width()+1)];
|
||||
assert(indlist[4] != -1);
|
||||
assert(indlist[4] < 10000);
|
||||
}
|
||||
if (edgeTable[iCubeIndex] & 32)
|
||||
{
|
||||
indlist[5] = vertexIndicesY1[getIndex(uXRegSpace+1,uYRegSpace, regSlice.width()+1)];
|
||||
assert(indlist[5] != -1);
|
||||
assert(indlist[5] < 10000);
|
||||
}
|
||||
if (edgeTable[iCubeIndex] & 64)
|
||||
{
|
||||
indlist[6] = vertexIndicesX1[getIndex(uXRegSpace,uYRegSpace+1, regSlice.width()+1)];
|
||||
assert(indlist[6] != -1);
|
||||
assert(indlist[6] < 10000);
|
||||
}
|
||||
if (edgeTable[iCubeIndex] & 128)
|
||||
{
|
||||
indlist[7] = vertexIndicesY1[getIndex(uXRegSpace,uYRegSpace, regSlice.width()+1)];
|
||||
assert(indlist[7] != -1);
|
||||
assert(indlist[7] < 10000);
|
||||
}
|
||||
if (edgeTable[iCubeIndex] & 256)
|
||||
{
|
||||
indlist[8] = vertexIndicesZ0[getIndex(uXRegSpace,uYRegSpace, regSlice.width()+1)];
|
||||
assert(indlist[8] != -1);
|
||||
assert(indlist[8] < 10000);
|
||||
}
|
||||
if (edgeTable[iCubeIndex] & 512)
|
||||
{
|
||||
indlist[9] = vertexIndicesZ0[getIndex(uXRegSpace+1,uYRegSpace, regSlice.width()+1)];
|
||||
assert(indlist[9] != -1);
|
||||
assert(indlist[9] < 10000);
|
||||
}
|
||||
if (edgeTable[iCubeIndex] & 1024)
|
||||
{
|
||||
indlist[10] = vertexIndicesZ0[getIndex(uXRegSpace+1,uYRegSpace+1, regSlice.width()+1)];
|
||||
assert(indlist[10] != -1);
|
||||
assert(indlist[10] < 10000);
|
||||
}
|
||||
if (edgeTable[iCubeIndex] & 2048)
|
||||
{
|
||||
indlist[11] = vertexIndicesZ0[getIndex(uXRegSpace,uYRegSpace+1, regSlice.width()+1)];
|
||||
assert(indlist[11] != -1);
|
||||
assert(indlist[11] < 10000);
|
||||
}
|
||||
|
||||
for (int i=0;triTable[iCubeIndex][i]!=-1;i+=3)
|
||||
{
|
||||
uint32_t ind0 = indlist[triTable[iCubeIndex][i ]];
|
||||
uint32_t ind1 = indlist[triTable[iCubeIndex][i+1]];
|
||||
uint32_t ind2 = indlist[triTable[iCubeIndex][i+2]];
|
||||
|
||||
singleMaterialPatch->addTriangle(ind0, ind1, ind2);
|
||||
}//For each triangle
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
Loading…
x
Reference in New Issue
Block a user