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Initial version of cubic surface extractor.

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This commit is contained in:
David Williams
2010-08-29 21:43:37 +00:00
parent 1123999d93
commit 43a1d0efa0
4 changed files with 197 additions and 0 deletions
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2
library/PolyVoxCore/CMakeLists.txt
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@@ -22,6 +22,8 @@ SET(CORE_INC_FILES
include/Array.h
include/Array.inl
include/ArraySizes.h
include/CubicSurfaceExtractor.h
include/CubicSurfaceExtractor.inl
include/Filters.h
include/Filters.inl
include/GradientEstimators.inl

62
library/PolyVoxCore/include/CubicSurfaceExtractor.h Normal file
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@@ -0,0 +1,62 @@
#pragma region License
/*******************************************************************************
Copyright (c) 2005-2009 David Williams
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source
distribution.
*******************************************************************************/
#pragma endregion
#ifndef __PolyVox_CubicSurfaceExtractor_H__
#define __PolyVox_CubicSurfaceExtractor_H__
#pragma region Headers
#include "PolyVoxForwardDeclarations.h"
#include "VolumeSampler.h"
#include "PolyVoxImpl/TypeDef.h"
#pragma endregion
namespace PolyVox
{
template <typename VoxelType>
class CubicSurfaceExtractor
{
public:
CubicSurfaceExtractor(Volume<VoxelType>* volData, Region region, SurfaceMesh* result);
void execute();
private:
//The volume data and a sampler to access it.
Volume<VoxelType>* m_volData;
VolumeSampler<VoxelType> m_sampVolume;
//The surface patch we are currently filling.
SurfaceMesh* m_meshCurrent;
//Information about the region we are currently processing
Region m_regSizeInVoxels;
Region m_regSizeInCells;
};
}
#include "CubicSurfaceExtractor.inl"
#endif

132
library/PolyVoxCore/include/CubicSurfaceExtractor.inl Normal file
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@@ -0,0 +1,132 @@
/*******************************************************************************
Copyright (c) 2005-2009 David Williams
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source
distribution.
*******************************************************************************/
#include "Array.h"
#include "MaterialDensityPair.h"
#include "SurfaceMesh.h"
#include "PolyVoxImpl/MarchingCubesTables.h"
#include "SurfaceVertex.h"
namespace PolyVox
{
template <typename VoxelType>
CubicSurfaceExtractor<VoxelType>::CubicSurfaceExtractor(Volume<VoxelType>* volData, Region region, SurfaceMesh* result)
:m_volData(volData)
,m_sampVolume(volData)
,m_regSizeInVoxels(region)
,m_meshCurrent(result)
{
m_regSizeInVoxels.cropTo(m_volData->getEnclosingRegion());
m_regSizeInCells = m_regSizeInVoxels;
m_regSizeInCells.setUpperCorner(m_regSizeInCells.getUpperCorner() - Vector3DInt16(1,1,1));
m_meshCurrent->clear();
}
template <typename VoxelType>
void CubicSurfaceExtractor<VoxelType>::execute()
{
for(uint16_t z = m_regSizeInVoxels.getLowerCorner().getZ(); z < m_regSizeInVoxels.getUpperCorner().getZ(); z++)
{
for(uint16_t y = m_regSizeInVoxels.getLowerCorner().getY(); y < m_regSizeInVoxels.getUpperCorner().getY(); y++)
{
for(uint16_t x = m_regSizeInVoxels.getLowerCorner().getX(); x < m_regSizeInVoxels.getUpperCorner().getX(); x++)
{
int currentVoxel = m_volData->getVoxelAt(x,y,z).getDensity() >= VoxelType::getThreshold();
int plusXVoxel = m_volData->getVoxelAt(x+1,y,z).getDensity() >= VoxelType::getThreshold();
if(currentVoxel > plusXVoxel)
{
uint32_t v0 = m_meshCurrent->addVertex(SurfaceVertex(Vector3DFloat(x + 0.5f, y - 0.5f, z - 0.5f), Vector3DFloat(1.0f, 0.0f, 0.0f), 1));
uint32_t v1 = m_meshCurrent->addVertex(SurfaceVertex(Vector3DFloat(x + 0.5f, y - 0.5f, z + 0.5f), Vector3DFloat(1.0f, 0.0f, 0.0f), 1));
uint32_t v2 = m_meshCurrent->addVertex(SurfaceVertex(Vector3DFloat(x + 0.5f, y + 0.5f, z - 0.5f), Vector3DFloat(1.0f, 0.0f, 0.0f), 1));
uint32_t v3 = m_meshCurrent->addVertex(SurfaceVertex(Vector3DFloat(x + 0.5f, y + 0.5f, z + 0.5f), Vector3DFloat(1.0f, 0.0f, 0.0f), 1));
m_meshCurrent->addTriangle(v0,v1,v2);
m_meshCurrent->addTriangle(v1,v3,v2);
}
if(currentVoxel < plusXVoxel)
{
uint32_t v0 = m_meshCurrent->addVertex(SurfaceVertex(Vector3DFloat(x + 0.5f, y - 0.5f, z - 0.5f), Vector3DFloat(-1.0f, 0.0f, 0.0f), 1));
uint32_t v1 = m_meshCurrent->addVertex(SurfaceVertex(Vector3DFloat(x + 0.5f, y - 0.5f, z + 0.5f), Vector3DFloat(-1.0f, 0.0f, 0.0f), 1));
uint32_t v2 = m_meshCurrent->addVertex(SurfaceVertex(Vector3DFloat(x + 0.5f, y + 0.5f, z - 0.5f), Vector3DFloat(-1.0f, 0.0f, 0.0f), 1));
uint32_t v3 = m_meshCurrent->addVertex(SurfaceVertex(Vector3DFloat(x + 0.5f, y + 0.5f, z + 0.5f), Vector3DFloat(-1.0f, 0.0f, 0.0f), 1));
m_meshCurrent->addTriangle(v0,v1,v2);
m_meshCurrent->addTriangle(v1,v3,v2);
}
int plusYVoxel = m_volData->getVoxelAt(x,y+1,z).getDensity() >= VoxelType::getThreshold();
if(currentVoxel > plusYVoxel)
{
uint32_t v0 = m_meshCurrent->addVertex(SurfaceVertex(Vector3DFloat(x - 0.5f, y + 0.5f, z - 0.5f), Vector3DFloat(0.0f, 1.0f, 0.0f), 1));
uint32_t v1 = m_meshCurrent->addVertex(SurfaceVertex(Vector3DFloat(x - 0.5f, y + 0.5f, z + 0.5f), Vector3DFloat(0.0f, 1.0f, 0.0f), 1));
uint32_t v2 = m_meshCurrent->addVertex(SurfaceVertex(Vector3DFloat(x + 0.5f, y + 0.5f, z - 0.5f), Vector3DFloat(0.0f, 1.0f, 0.0f), 1));
uint32_t v3 = m_meshCurrent->addVertex(SurfaceVertex(Vector3DFloat(x + 0.5f, y + 0.5f, z + 0.5f), Vector3DFloat(0.0f, 1.0f, 0.0f), 1));
m_meshCurrent->addTriangle(v0,v1,v2);
m_meshCurrent->addTriangle(v1,v3,v2);
}
if(currentVoxel < plusYVoxel)
{
uint32_t v0 = m_meshCurrent->addVertex(SurfaceVertex(Vector3DFloat(x - 0.5f, y + 0.5f, z - 0.5f), Vector3DFloat(0.0f, -1.0f, 0.0f), 1));
uint32_t v1 = m_meshCurrent->addVertex(SurfaceVertex(Vector3DFloat(x - 0.5f, y + 0.5f, z + 0.5f), Vector3DFloat(0.0f, -1.0f, 0.0f), 1));
uint32_t v2 = m_meshCurrent->addVertex(SurfaceVertex(Vector3DFloat(x + 0.5f, y + 0.5f, z - 0.5f), Vector3DFloat(0.0f, -1.0f, 0.0f), 1));
uint32_t v3 = m_meshCurrent->addVertex(SurfaceVertex(Vector3DFloat(x + 0.5f, y + 0.5f, z + 0.5f), Vector3DFloat(0.0f, -1.0f, 0.0f), 1));
m_meshCurrent->addTriangle(v0,v1,v2);
m_meshCurrent->addTriangle(v1,v3,v2);
}
int plusZVoxel = m_volData->getVoxelAt(x,y,z+1).getDensity() >= VoxelType::getThreshold();
if(currentVoxel > plusZVoxel)
{
uint32_t v0 = m_meshCurrent->addVertex(SurfaceVertex(Vector3DFloat(x - 0.5f, y - 0.5f, z + 0.5f), Vector3DFloat(0.0f, 0.0f, 1.0f), 1));
uint32_t v1 = m_meshCurrent->addVertex(SurfaceVertex(Vector3DFloat(x - 0.5f, y + 0.5f, z + 0.5f), Vector3DFloat(0.0f, 0.0f, 1.0f), 1));
uint32_t v2 = m_meshCurrent->addVertex(SurfaceVertex(Vector3DFloat(x + 0.5f, y - 0.5f, z + 0.5f), Vector3DFloat(0.0f, 0.0f, 1.0f), 1));
uint32_t v3 = m_meshCurrent->addVertex(SurfaceVertex(Vector3DFloat(x + 0.5f, y + 0.5f, z + 0.5f), Vector3DFloat(0.0f, 0.0f, 1.0f), 1));
m_meshCurrent->addTriangle(v0,v1,v2);
m_meshCurrent->addTriangle(v1,v3,v2);
}
if(currentVoxel < plusZVoxel)
{
uint32_t v0 = m_meshCurrent->addVertex(SurfaceVertex(Vector3DFloat(x - 0.5f, y - 0.5f, z + 0.5f), Vector3DFloat(0.0f, 0.0f, -1.0f), 1));
uint32_t v1 = m_meshCurrent->addVertex(SurfaceVertex(Vector3DFloat(x - 0.5f, y + 0.5f, z + 0.5f), Vector3DFloat(0.0f, 0.0f, -1.0f), 1));
uint32_t v2 = m_meshCurrent->addVertex(SurfaceVertex(Vector3DFloat(x + 0.5f, y - 0.5f, z + 0.5f), Vector3DFloat(0.0f, 0.0f, -1.0f), 1));
uint32_t v3 = m_meshCurrent->addVertex(SurfaceVertex(Vector3DFloat(x + 0.5f, y + 0.5f, z + 0.5f), Vector3DFloat(0.0f, 0.0f, -1.0f), 1));
m_meshCurrent->addTriangle(v0,v1,v2);
m_meshCurrent->addTriangle(v1,v3,v2);
}
}
}
}
m_meshCurrent->m_vecLodRecords.clear();
LodRecord lodRecord;
lodRecord.beginIndex = 0;
lodRecord.endIndex = m_meshCurrent->getNoOfIndices();
m_meshCurrent->m_vecLodRecords.push_back(lodRecord);
}
}

1
library/PolyVoxCore/include/PolyVoxForwardDeclarations.h
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@@ -82,6 +82,7 @@ namespace PolyVox
class SurfaceMesh;
class Region;
class SurfaceVertex;
template <typename VoxelType> class CubicSurfaceExtractor;
template <typename VoxelType> class SurfaceExtractor;
//---------- Vector ----------