Massive changes to the organisation of PolyVoxCore and PolyVoxYtil.
Also added start of logging capability.
This commit is contained in:
David Williams
@ -0,0 +1,595 @@
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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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#include "PolyVoxImpl/DecimatedSurfaceExtractor.h"
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#include "Volume.h"
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#include "GradientEstimators.h"
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#include "IndexedSurfacePatch.h"
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#include "PolyVoxImpl/MarchingCubesTables.h"
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#include "Region.h"
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#include "VolumeIterator.h"
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#include <algorithm>
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using namespace std;
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namespace PolyVox
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{
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uint32_t getDecimatedIndex(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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void extractDecimatedSurfaceImpl(Volume<uint8_t>* volumeData, uint8_t uLevel, 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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//FIXME - do the slices need to be this big? Surely for a decimated mesh they can be smaller?
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//FIXME - Instead of region.width()+2 we used to use POLYVOX_REGION_SIDE_LENGTH+1
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//Normally POLYVOX_REGION_SIDE_LENGTH is the same as region.width() (often 32) but at the
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//edges of the volume it is 1 smaller. Need to think what values really belong here.
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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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const uint8_t uStepSize = uLevel == 0 ? 1 : 1 << uLevel;
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//When generating the mesh for a region we actually look 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(2*uStepSize-1,2*uStepSize-1,2*uStepSize-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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Vector3DInt32 v3dUpperCorner = regSlice0.getUpperCorner();
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v3dUpperCorner.setZ(regSlice0.getLowerCorner().getZ()); //Set the upper z to the lower z to make it one slice thick.
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regSlice0.setUpperCorner(v3dUpperCorner);
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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 = computeInitialDecimatedBitmaskForSlice(volIter, uLevel, regSlice0, offset, bitmask0);
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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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generateDecimatedVerticesForSlice(volIter, uLevel, regSlice0, offset, bitmask0, singleMaterialPatch, vertexIndicesX0, vertexIndicesY0, vertexIndicesZ0);
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}
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for(uint32_t uSlice = 1; ((uSlice <= region.depth()) && (uSlice + offset.getZ() <= regVolume.getUpperCorner().getZ())); uSlice += uStepSize)
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{
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Region regSlice1(regSlice0);
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regSlice1.shift(Vector3DInt32(0,0,uStepSize));
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uint32_t uNoOfNonEmptyCellsForSlice1 = computeDecimatedBitmaskForSliceFromPrevious(volIter, uLevel, regSlice1, offset, bitmask1, bitmask0);
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if(uNoOfNonEmptyCellsForSlice1 != 0)
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{
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generateDecimatedVerticesForSlice(volIter, uLevel, 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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generateDecimatedIndicesForSlice(volIter, uLevel, 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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/*std::vector<SurfaceVertex>::iterator iterSurfaceVertex = singleMaterialPatch->getVertices().begin();
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while(iterSurfaceVertex != singleMaterialPatch->getVertices().end())
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{
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Vector3DFloat tempNormal = computeDecimatedNormal(volumeData, static_cast<Vector3DFloat>(iterSurfaceVertex->getPosition() + offset), CENTRAL_DIFFERENCE);
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const_cast<SurfaceVertex&>(*iterSurfaceVertex).setNormal(tempNormal);
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++iterSurfaceVertex;
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}*/
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}
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uint32_t computeInitialDecimatedBitmaskForSlice(VolumeIterator<uint8_t>& volIter, uint8_t uLevel, const Region& regSlice, const Vector3DFloat& offset, uint8_t* bitmask)
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{
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const uint8_t uStepSize = uLevel == 0 ? 1 : 1 << uLevel;
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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 y = regSlice.getLowerCorner().getY(); y <= regSlice.getUpperCorner().getY(); y += uStepSize)
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{
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for(uint16_t x = regSlice.getLowerCorner().getX(); x <= regSlice.getUpperCorner().getX(); x += uStepSize)
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{
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//Current position
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volIter.setPosition(x,y,regSlice.getLowerCorner().getZ());
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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((x==regSlice.getLowerCorner().getX()) && (y==regSlice.getLowerCorner().getY()))
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{
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volIter.setPosition(x,y,regSlice.getLowerCorner().getZ());
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const uint8_t v000 = volIter.getSubSampledVoxel(uLevel);
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volIter.setPosition(x+uStepSize,y,regSlice.getLowerCorner().getZ());
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const uint8_t v100 = volIter.getSubSampledVoxel(uLevel);
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volIter.setPosition(x,y+uStepSize,regSlice.getLowerCorner().getZ());
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const uint8_t v010 = volIter.getSubSampledVoxel(uLevel);
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volIter.setPosition(x+uStepSize,y+uStepSize,regSlice.getLowerCorner().getZ());
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const uint8_t v110 = volIter.getSubSampledVoxel(uLevel);
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volIter.setPosition(x,y,regSlice.getLowerCorner().getZ()+uStepSize);
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const uint8_t v001 = volIter.getSubSampledVoxel(uLevel);
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volIter.setPosition(x+uStepSize,y,regSlice.getLowerCorner().getZ()+uStepSize);
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const uint8_t v101 = volIter.getSubSampledVoxel(uLevel);
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volIter.setPosition(x,y+uStepSize,regSlice.getLowerCorner().getZ()+uStepSize);
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const uint8_t v011 = volIter.getSubSampledVoxel(uLevel);
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volIter.setPosition(x+uStepSize,y+uStepSize,regSlice.getLowerCorner().getZ()+uStepSize);
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const uint8_t v111 = volIter.getSubSampledVoxel(uLevel);
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if (v000 == 0) iCubeIndex |= 1;
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if (v100 == 0) iCubeIndex |= 2;
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if (v110 == 0) iCubeIndex |= 4;
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if (v010 == 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 (v111 == 0) iCubeIndex |= 64;
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if (v011 == 0) iCubeIndex |= 128;
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}
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else if((x>regSlice.getLowerCorner().getX()) && y==regSlice.getLowerCorner().getY())
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{
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volIter.setPosition(x+uStepSize,y,regSlice.getLowerCorner().getZ());
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const uint8_t v100 = volIter.getSubSampledVoxel(uLevel);
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volIter.setPosition(x+uStepSize,y+uStepSize,regSlice.getLowerCorner().getZ());
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const uint8_t v110 = volIter.getSubSampledVoxel(uLevel);
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volIter.setPosition(x+uStepSize,y,regSlice.getLowerCorner().getZ()+uStepSize);
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const uint8_t v101 = volIter.getSubSampledVoxel(uLevel);
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volIter.setPosition(x+uStepSize,y+uStepSize,regSlice.getLowerCorner().getZ()+uStepSize);
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const uint8_t v111 = volIter.getSubSampledVoxel(uLevel);
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//x
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uint8_t iPreviousCubeIndexX = bitmask[getDecimatedIndex(x- offset.getX()-uStepSize,y- offset.getY(), regSlice.width()+1)];
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uint8_t srcBit6 = iPreviousCubeIndexX & 64;
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uint8_t destBit7 = srcBit6 << 1;
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uint8_t srcBit5 = iPreviousCubeIndexX & 32;
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uint8_t destBit4 = srcBit5 >> 1;
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uint8_t srcBit2 = iPreviousCubeIndexX & 4;
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uint8_t destBit3 = srcBit2 << 1;
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uint8_t srcBit1 = iPreviousCubeIndexX & 2;
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uint8_t destBit0 = srcBit1 >> 1;
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iCubeIndex |= destBit0;
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if (v100 == 0) iCubeIndex |= 2;
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if (v110 == 0) iCubeIndex |= 4;
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iCubeIndex |= destBit3;
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iCubeIndex |= destBit4;
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if (v101 == 0) iCubeIndex |= 32;
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if (v111 == 0) iCubeIndex |= 64;
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iCubeIndex |= destBit7;
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}
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else if((x==regSlice.getLowerCorner().getX()) && (y>regSlice.getLowerCorner().getY()))
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{
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volIter.setPosition(x,y+uStepSize,regSlice.getLowerCorner().getZ());
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const uint8_t v010 = volIter.getSubSampledVoxel(uLevel);
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volIter.setPosition(x+uStepSize,y+uStepSize,regSlice.getLowerCorner().getZ());
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const uint8_t v110 = volIter.getSubSampledVoxel(uLevel);
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volIter.setPosition(x,y+uStepSize,regSlice.getLowerCorner().getZ()+uStepSize);
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const uint8_t v011 = volIter.getSubSampledVoxel(uLevel);
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volIter.setPosition(x+uStepSize,y+uStepSize,regSlice.getLowerCorner().getZ()+uStepSize);
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const uint8_t v111 = volIter.getSubSampledVoxel(uLevel);
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//y
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uint8_t iPreviousCubeIndexY = bitmask[getDecimatedIndex(x- offset.getX(),y- offset.getY()-uStepSize, regSlice.width()+1)];
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uint8_t srcBit7 = iPreviousCubeIndexY & 128;
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uint8_t destBit4 = srcBit7 >> 3;
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uint8_t srcBit6 = iPreviousCubeIndexY & 64;
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uint8_t destBit5 = srcBit6 >> 1;
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uint8_t srcBit3 = iPreviousCubeIndexY & 8;
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uint8_t destBit0 = srcBit3 >> 3;
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uint8_t srcBit2 = iPreviousCubeIndexY & 4;
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uint8_t destBit1 = srcBit2 >> 1;
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iCubeIndex |= destBit0;
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iCubeIndex |= destBit1;
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if (v110 == 0) iCubeIndex |= 4;
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if (v010 == 0) iCubeIndex |= 8;
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iCubeIndex |= destBit4;
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iCubeIndex |= destBit5;
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if (v111 == 0) iCubeIndex |= 64;
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if (v011 == 0) iCubeIndex |= 128;
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}
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else
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{
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volIter.setPosition(x+uStepSize,y+uStepSize,regSlice.getLowerCorner().getZ());
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const uint8_t v110 = volIter.getSubSampledVoxel(uLevel);
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volIter.setPosition(x+uStepSize,y+uStepSize,regSlice.getLowerCorner().getZ()+uStepSize);
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const uint8_t v111 = volIter.getSubSampledVoxel(uLevel);
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//y
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uint8_t iPreviousCubeIndexY = bitmask[getDecimatedIndex(x- offset.getX(),y- offset.getY()-uStepSize, regSlice.width()+1)];
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uint8_t srcBit7 = iPreviousCubeIndexY & 128;
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uint8_t destBit4 = srcBit7 >> 3;
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uint8_t srcBit6 = iPreviousCubeIndexY & 64;
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uint8_t destBit5 = srcBit6 >> 1;
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uint8_t srcBit3 = iPreviousCubeIndexY & 8;
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uint8_t destBit0 = srcBit3 >> 3;
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uint8_t srcBit2 = iPreviousCubeIndexY & 4;
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uint8_t destBit1 = srcBit2 >> 1;
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//x
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uint8_t iPreviousCubeIndexX = bitmask[getDecimatedIndex(x- offset.getX()-uStepSize,y- offset.getY(), regSlice.width()+1)];
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srcBit6 = iPreviousCubeIndexX & 64;
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uint8_t destBit7 = srcBit6 << 1;
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srcBit2 = iPreviousCubeIndexX & 4;
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uint8_t destBit3 = srcBit2 << 1;
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iCubeIndex |= destBit0;
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iCubeIndex |= destBit1;
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if (v110 == 0) iCubeIndex |= 4;
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iCubeIndex |= destBit3;
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iCubeIndex |= destBit4;
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iCubeIndex |= destBit5;
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if (v111 == 0) iCubeIndex |= 64;
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iCubeIndex |= destBit7;
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}
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//Save the bitmask
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bitmask[getDecimatedIndex(x- offset.getX(),y- offset.getY(), regSlice.width()+1)] = iCubeIndex;
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if(edgeTable[iCubeIndex] != 0)
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{
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++uNoOfNonEmptyCells;
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}
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}
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}
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return uNoOfNonEmptyCells;
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}
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uint32_t computeDecimatedBitmaskForSliceFromPrevious(VolumeIterator<uint8_t>& volIter, uint8_t uLevel, const Region& regSlice, const Vector3DFloat& offset, uint8_t* bitmask, uint8_t* previousBitmask)
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{
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const uint8_t uStepSize = uLevel == 0 ? 1 : 1 << uLevel;
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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 y = regSlice.getLowerCorner().getY(); y <= regSlice.getUpperCorner().getY(); y += uStepSize)
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{
|
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for(uint16_t x = regSlice.getLowerCorner().getX(); x <= regSlice.getUpperCorner().getX(); x += uStepSize)
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{
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//Current position
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volIter.setPosition(x,y,regSlice.getLowerCorner().getZ());
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|
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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;
|
||||
|
||||
if((x==regSlice.getLowerCorner().getX()) && (y==regSlice.getLowerCorner().getY()))
|
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{
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volIter.setPosition(x,y,regSlice.getLowerCorner().getZ()+uStepSize);
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const uint8_t v001 = volIter.getSubSampledVoxel(uLevel);
|
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volIter.setPosition(x+uStepSize,y,regSlice.getLowerCorner().getZ()+uStepSize);
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const uint8_t v101 = volIter.getSubSampledVoxel(uLevel);
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volIter.setPosition(x,y+uStepSize,regSlice.getLowerCorner().getZ()+uStepSize);
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const uint8_t v011 = volIter.getSubSampledVoxel(uLevel);
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volIter.setPosition(x+uStepSize,y+uStepSize,regSlice.getLowerCorner().getZ()+uStepSize);
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const uint8_t v111 = volIter.getSubSampledVoxel(uLevel);
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//z
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uint8_t iPreviousCubeIndexZ = previousBitmask[getDecimatedIndex(x- offset.getX(),y- offset.getY(), 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 (v111 == 0) iCubeIndex |= 64;
|
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if (v011 == 0) iCubeIndex |= 128;
|
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}
|
||||
else if((x>regSlice.getLowerCorner().getX()) && y==regSlice.getLowerCorner().getY())
|
||||
{
|
||||
volIter.setPosition(x+uStepSize,y,regSlice.getLowerCorner().getZ()+uStepSize);
|
||||
const uint8_t v101 = volIter.getSubSampledVoxel(uLevel);
|
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volIter.setPosition(x+uStepSize,y+uStepSize,regSlice.getLowerCorner().getZ()+uStepSize);
|
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const uint8_t v111 = volIter.getSubSampledVoxel(uLevel);
|
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|
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//z
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uint8_t iPreviousCubeIndexZ = previousBitmask[getDecimatedIndex(x- offset.getX(),y- offset.getY(), regSlice.width()+1)];
|
||||
iCubeIndex = iPreviousCubeIndexZ >> 4;
|
||||
|
||||
//x
|
||||
uint8_t iPreviousCubeIndexX = bitmask[getDecimatedIndex(x- offset.getX()-uStepSize,y- offset.getY(), regSlice.width()+1)];
|
||||
uint8_t srcBit6 = iPreviousCubeIndexX & 64;
|
||||
uint8_t destBit7 = srcBit6 << 1;
|
||||
|
||||
uint8_t srcBit5 = iPreviousCubeIndexX & 32;
|
||||
uint8_t destBit4 = srcBit5 >> 1;
|
||||
|
||||
iCubeIndex |= destBit4;
|
||||
if (v101 == 0) iCubeIndex |= 32;
|
||||
if (v111 == 0) iCubeIndex |= 64;
|
||||
iCubeIndex |= destBit7;
|
||||
}
|
||||
else if((x==regSlice.getLowerCorner().getX()) && (y>regSlice.getLowerCorner().getY()))
|
||||
{
|
||||
volIter.setPosition(x,y+uStepSize,regSlice.getLowerCorner().getZ()+uStepSize);
|
||||
const uint8_t v011 = volIter.getSubSampledVoxel(uLevel);
|
||||
volIter.setPosition(x+uStepSize,y+uStepSize,regSlice.getLowerCorner().getZ()+uStepSize);
|
||||
const uint8_t v111 = volIter.getSubSampledVoxel(uLevel);
|
||||
|
||||
//z
|
||||
uint8_t iPreviousCubeIndexZ = previousBitmask[getDecimatedIndex(x- offset.getX(),y- offset.getY(), regSlice.width()+1)];
|
||||
iCubeIndex = iPreviousCubeIndexZ >> 4;
|
||||
|
||||
//y
|
||||
uint8_t iPreviousCubeIndexY = bitmask[getDecimatedIndex(x- offset.getX(),y- offset.getY()-uStepSize, regSlice.width()+1)];
|
||||
uint8_t srcBit7 = iPreviousCubeIndexY & 128;
|
||||
uint8_t destBit4 = srcBit7 >> 3;
|
||||
|
||||
uint8_t srcBit6 = iPreviousCubeIndexY & 64;
|
||||
uint8_t destBit5 = srcBit6 >> 1;
|
||||
|
||||
iCubeIndex |= destBit4;
|
||||
iCubeIndex |= destBit5;
|
||||
if (v111 == 0) iCubeIndex |= 64;
|
||||
if (v011 == 0) iCubeIndex |= 128;
|
||||
}
|
||||
else
|
||||
{
|
||||
volIter.setPosition(x+uStepSize,y+uStepSize,regSlice.getLowerCorner().getZ()+uStepSize);
|
||||
const uint8_t v111 = volIter.getSubSampledVoxel(uLevel);
|
||||
|
||||
//z
|
||||
uint8_t iPreviousCubeIndexZ = previousBitmask[getDecimatedIndex(x- offset.getX(),y- offset.getY(), regSlice.width()+1)];
|
||||
iCubeIndex = iPreviousCubeIndexZ >> 4;
|
||||
|
||||
//y
|
||||
uint8_t iPreviousCubeIndexY = bitmask[getDecimatedIndex(x- offset.getX(),y- offset.getY()-uStepSize, regSlice.width()+1)];
|
||||
uint8_t srcBit7 = iPreviousCubeIndexY & 128;
|
||||
uint8_t destBit4 = srcBit7 >> 3;
|
||||
|
||||
uint8_t srcBit6 = iPreviousCubeIndexY & 64;
|
||||
uint8_t destBit5 = srcBit6 >> 1;
|
||||
|
||||
//x
|
||||
uint8_t iPreviousCubeIndexX = bitmask[getDecimatedIndex(x- offset.getX()-uStepSize,y- offset.getY(), regSlice.width()+1)];
|
||||
srcBit6 = iPreviousCubeIndexX & 64;
|
||||
uint8_t destBit7 = srcBit6 << 1;
|
||||
|
||||
iCubeIndex |= destBit4;
|
||||
iCubeIndex |= destBit5;
|
||||
if (v111 == 0) iCubeIndex |= 64;
|
||||
iCubeIndex |= destBit7;
|
||||
}
|
||||
|
||||
//Save the bitmask
|
||||
bitmask[getDecimatedIndex(x- offset.getX(),y- offset.getY(), regSlice.width()+1)] = iCubeIndex;
|
||||
|
||||
if(edgeTable[iCubeIndex] != 0)
|
||||
{
|
||||
++uNoOfNonEmptyCells;
|
||||
}
|
||||
|
||||
}//For each cell
|
||||
}
|
||||
|
||||
return uNoOfNonEmptyCells;
|
||||
}
|
||||
|
||||
void generateDecimatedVerticesForSlice(VolumeIterator<uint8_t>& volIter, uint8_t uLevel, Region& regSlice, const Vector3DFloat& offset, uint8_t* bitmask, IndexedSurfacePatch* singleMaterialPatch,int32_t vertexIndicesX[],int32_t vertexIndicesY[],int32_t vertexIndicesZ[])
|
||||
{
|
||||
const uint8_t uStepSize = uLevel == 0 ? 1 : 1 << uLevel;
|
||||
|
||||
//Iterate over each cell in the region
|
||||
for(uint16_t y = regSlice.getLowerCorner().getY(); y <= regSlice.getUpperCorner().getY(); y += uStepSize)
|
||||
{
|
||||
for(uint16_t x = regSlice.getLowerCorner().getX(); x <= regSlice.getUpperCorner().getX(); x += uStepSize)
|
||||
{
|
||||
//Current position
|
||||
const uint16_t z = regSlice.getLowerCorner().getZ();
|
||||
|
||||
volIter.setPosition(x,y,z);
|
||||
const uint8_t v000 = volIter.getSubSampledVoxel(uLevel);
|
||||
|
||||
//Determine the index into the edge table which tells us which vertices are inside of the surface
|
||||
uint8_t iCubeIndex = bitmask[getDecimatedIndex(x - offset.getX(),y - offset.getY(), 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(x != regSlice.getUpperCorner().getX())
|
||||
{
|
||||
volIter.setPosition(x + uStepSize,y,z);
|
||||
const uint8_t v100 = volIter.getSubSampledVoxel(uLevel);
|
||||
const Vector3DFloat v3dPosition(x - offset.getX() + 0.5f * uStepSize, y - offset.getY(), z - offset.getZ());
|
||||
const Vector3DFloat v3dNormal(v000 > v100 ? 1.0f : -1.0f,0.0,0.0);
|
||||
const uint8_t uMaterial = v000 | v100; //Because one of these is 0, the or operation takes the max.
|
||||
SurfaceVertex surfaceVertex(v3dPosition, v3dNormal, uMaterial);
|
||||
uint32_t uLastVertexIndex = singleMaterialPatch->addVertex(surfaceVertex);
|
||||
vertexIndicesX[getDecimatedIndex(x - offset.getX(),y - offset.getY(), regSlice.width()+1)] = uLastVertexIndex;
|
||||
}
|
||||
}
|
||||
if (edgeTable[iCubeIndex] & 8)
|
||||
{
|
||||
if(y != regSlice.getUpperCorner().getY())
|
||||
{
|
||||
volIter.setPosition(x,y + uStepSize,z);
|
||||
const uint8_t v010 = volIter.getSubSampledVoxel(uLevel);
|
||||
const Vector3DFloat v3dPosition(x - offset.getX(), y - offset.getY() + 0.5f * uStepSize, z - offset.getZ());
|
||||
const Vector3DFloat v3dNormal(0.0,v000 > v010 ? 1.0f : -1.0f,0.0);
|
||||
const uint8_t uMaterial = v000 | v010; //Because one of these is 0, the or operation takes the max.
|
||||
SurfaceVertex surfaceVertex(v3dPosition, v3dNormal, uMaterial);
|
||||
uint32_t uLastVertexIndex = singleMaterialPatch->addVertex(surfaceVertex);
|
||||
vertexIndicesY[getDecimatedIndex(x - offset.getX(),y - offset.getY(), regSlice.width()+1)] = uLastVertexIndex;
|
||||
}
|
||||
}
|
||||
if (edgeTable[iCubeIndex] & 256)
|
||||
{
|
||||
//if(z != regSlice.getUpperCorner.getZ())
|
||||
{
|
||||
volIter.setPosition(x,y,z + uStepSize);
|
||||
const uint8_t v001 = volIter.getSubSampledVoxel(uLevel);
|
||||
const Vector3DFloat v3dPosition(x - offset.getX(), y - offset.getY(), z - offset.getZ() + 0.5f * uStepSize);
|
||||
const Vector3DFloat v3dNormal(0.0,0.0,v000 > v001 ? 1.0f : -1.0f);
|
||||
const uint8_t uMaterial = v000 | v001; //Because one of these is 0, the or operation takes the max.
|
||||
const SurfaceVertex surfaceVertex(v3dPosition, v3dNormal, uMaterial);
|
||||
uint32_t uLastVertexIndex = singleMaterialPatch->addVertex(surfaceVertex);
|
||||
vertexIndicesZ[getDecimatedIndex(x - offset.getX(),y - offset.getY(), regSlice.width()+1)] = uLastVertexIndex;
|
||||
}
|
||||
}
|
||||
}//For each cell
|
||||
}
|
||||
}
|
||||
|
||||
void generateDecimatedIndicesForSlice(VolumeIterator<uint8_t>& volIter, uint8_t uLevel, 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[])
|
||||
{
|
||||
const uint8_t uStepSize = uLevel == 0 ? 1 : 1 << uLevel;
|
||||
uint32_t indlist[12];
|
||||
|
||||
for(uint16_t y = regSlice.getLowerCorner().getY() - offset.getY(); y < regSlice.getUpperCorner().getY() - offset.getY(); y += uStepSize)
|
||||
{
|
||||
for(uint16_t x = regSlice.getLowerCorner().getX() - offset.getX(); x < regSlice.getUpperCorner().getX() - offset.getX(); x += uStepSize)
|
||||
{
|
||||
//Current position
|
||||
const uint16_t z = regSlice.getLowerCorner().getZ() - offset.getZ();
|
||||
|
||||
//Determine the index into the edge table which tells us which vertices are inside of the surface
|
||||
uint8_t iCubeIndex = bitmask0[getDecimatedIndex(x,y, 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[getDecimatedIndex(x,y, regSlice.width()+1)];
|
||||
assert(indlist[0] != -1);
|
||||
}
|
||||
if (edgeTable[iCubeIndex] & 2)
|
||||
{
|
||||
indlist[1] = vertexIndicesY0[getDecimatedIndex(x+uStepSize,y, regSlice.width()+1)];
|
||||
assert(indlist[1] != -1);
|
||||
}
|
||||
if (edgeTable[iCubeIndex] & 4)
|
||||
{
|
||||
indlist[2] = vertexIndicesX0[getDecimatedIndex(x,y+uStepSize, regSlice.width()+1)];
|
||||
assert(indlist[2] != -1);
|
||||
}
|
||||
if (edgeTable[iCubeIndex] & 8)
|
||||
{
|
||||
indlist[3] = vertexIndicesY0[getDecimatedIndex(x,y, regSlice.width()+1)];
|
||||
assert(indlist[3] != -1);
|
||||
}
|
||||
if (edgeTable[iCubeIndex] & 16)
|
||||
{
|
||||
indlist[4] = vertexIndicesX1[getDecimatedIndex(x,y, regSlice.width()+1)];
|
||||
assert(indlist[4] != -1);
|
||||
}
|
||||
if (edgeTable[iCubeIndex] & 32)
|
||||
{
|
||||
indlist[5] = vertexIndicesY1[getDecimatedIndex(x+uStepSize,y, regSlice.width()+1)];
|
||||
assert(indlist[5] != -1);
|
||||
}
|
||||
if (edgeTable[iCubeIndex] & 64)
|
||||
{
|
||||
indlist[6] = vertexIndicesX1[getDecimatedIndex(x,y+uStepSize, regSlice.width()+1)];
|
||||
assert(indlist[6] != -1);
|
||||
}
|
||||
if (edgeTable[iCubeIndex] & 128)
|
||||
{
|
||||
indlist[7] = vertexIndicesY1[getDecimatedIndex(x,y, regSlice.width()+1)];
|
||||
assert(indlist[7] != -1);
|
||||
}
|
||||
if (edgeTable[iCubeIndex] & 256)
|
||||
{
|
||||
indlist[8] = vertexIndicesZ0[getDecimatedIndex(x,y, regSlice.width()+1)];
|
||||
assert(indlist[8] != -1);
|
||||
}
|
||||
if (edgeTable[iCubeIndex] & 512)
|
||||
{
|
||||
indlist[9] = vertexIndicesZ0[getDecimatedIndex(x+uStepSize,y, regSlice.width()+1)];
|
||||
assert(indlist[9] != -1);
|
||||
}
|
||||
if (edgeTable[iCubeIndex] & 1024)
|
||||
{
|
||||
indlist[10] = vertexIndicesZ0[getDecimatedIndex(x+uStepSize,y+uStepSize, regSlice.width()+1)];
|
||||
assert(indlist[10] != -1);
|
||||
}
|
||||
if (edgeTable[iCubeIndex] & 2048)
|
||||
{
|
||||
indlist[11] = vertexIndicesZ0[getDecimatedIndex(x,y+uStepSize, regSlice.width()+1)];
|
||||
assert(indlist[11] != -1);
|
||||
}
|
||||
|
||||
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
|
||||
}//For each cell
|
||||
}
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user