103 lines
3.1 KiB
C++
103 lines
3.1 KiB
C++
/*******************************************************************************
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Copyright (c) 2005-2009 David Williams
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source
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distribution.
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*******************************************************************************/
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#ifndef __PolyVox_MeshDecimator_H__
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#define __PolyVox_MeshDecimator_H__
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#include <bitset>
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namespace PolyVox
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{
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enum POLYVOXCORE_API NormalFlags
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{
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NF_NORMAL_NEG_X,
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NF_NORMAL_POS_X,
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NF_NORMAL_NEG_Y,
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NF_NORMAL_POS_Y,
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NF_NORMAL_NEG_Z,
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NF_NORMAL_POS_Z,
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NF_NO_OF_FLAGS
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};
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struct VertexMetadata
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{
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bool hasDuplicate;
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uint64_t materialKey;
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list<uint32_t> trianglesUsingVertex;
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int noOfDifferentNormals;
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Vector3DFloat normal;
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std::bitset<NF_NO_OF_FLAGS> m_bNormalFlags;
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bool isOnRegionEdge;
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bool isOnMaterialEdge;
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};
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template <typename VertexType>
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class MeshDecimator
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{
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public:
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MeshDecimator(SurfaceMesh<VertexType>* pInputMesh/*, SurfaceMesh<PositionMaterial>* pMeshOutput*/);
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void execute();
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private:
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void fillVertexMetadata(std::vector<VertexMetadata>& vecVertexMetadata);
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SurfaceMesh<VertexType>* m_pInputMesh;
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//SurfaceMesh<PositionMaterial>* pMeshOutput;
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void countNoOfNeighboursUsingMaterial(void);
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uint32_t performDecimationPass(float fMinDotProductForCollapse);
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bool isSubset(std::bitset<VF_NO_OF_FLAGS> a, std::bitset<VF_NO_OF_FLAGS> b);
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bool isSubsetCubic(std::bitset<NF_NO_OF_FLAGS> a, std::bitset<NF_NO_OF_FLAGS> b);
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bool canCollapseEdge(uint32_t uSrc, uint32_t uDest);
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bool canCollapseNormalEdge(uint32_t uSrc, uint32_t uDst);
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bool canCollapseRegionEdge(uint32_t uSrc, uint32_t uDst);
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bool canCollapseMaterialEdge(uint32_t uSrc, uint32_t uDst);
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bool collapseChangesFaceNormals(uint32_t uSrc, uint32_t uDst, float fThreshold);
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//Data structures used during decimation
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std::vector<uint8_t> m_vecNoOfNeighboursUsingMaterial;
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vector<bool> vertexLocked;
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vector<uint32_t> vertexMapper;
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//vector< list<uint32_t> > trianglesUsingVertexCurrently;
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vector<int> vecOfTriCts;
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vector<Vector3DFloat> vecOfTriNormals;
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//vector<int> noOfDifferentNormals;
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vector<VertexMetadata> m_vecInitialVertexMetadata;
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vector<VertexMetadata> m_vecCurrentVertexMetadata;
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float fMinDotProductForCollapse;
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};
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}
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#include "MeshDecimator.inl"
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#endif //__PolyVox_MeshDecimator_H__
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