PolyVox  0.2.1
Open source voxel management library
CubicSurfaceExtractorWithNormals.inl
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1 /*******************************************************************************
2 Copyright (c) 2005-2009 David Williams
3 
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5 warranty. In no event will the authors be held liable for any damages
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13  claim that you wrote the original software. If you use this software
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15  appreciated but is not required.
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23 
24 namespace PolyVox
25 {
26  template<typename VolumeType, typename IsQuadNeeded>
27  CubicSurfaceExtractorWithNormals<VolumeType, IsQuadNeeded>::CubicSurfaceExtractorWithNormals(VolumeType* volData, Region region, SurfaceMesh<PositionMaterialNormal>* result, IsQuadNeeded isQuadNeeded)
28  :m_volData(volData)
29  ,m_sampVolume(volData)
30  ,m_meshCurrent(result)
31  ,m_regSizeInVoxels(region)
32  {
33  m_funcIsQuadNeededCallback = isQuadNeeded;
34  }
35 
36  template<typename VolumeType, typename IsQuadNeeded>
37  void CubicSurfaceExtractorWithNormals<VolumeType, IsQuadNeeded>::execute()
38  {
39  m_meshCurrent->clear();
40 
41  for(int32_t z = m_regSizeInVoxels.getLowerCorner().getZ(); z < m_regSizeInVoxels.getUpperCorner().getZ(); z++)
42  {
43  for(int32_t y = m_regSizeInVoxels.getLowerCorner().getY(); y < m_regSizeInVoxels.getUpperCorner().getY(); y++)
44  {
45  for(int32_t x = m_regSizeInVoxels.getLowerCorner().getX(); x < m_regSizeInVoxels.getUpperCorner().getX(); x++)
46  {
47  // these are always positive anyway
48  float regX = static_cast<float>(x - m_regSizeInVoxels.getLowerCorner().getX());
49  float regY = static_cast<float>(y - m_regSizeInVoxels.getLowerCorner().getY());
50  float regZ = static_cast<float>(z - m_regSizeInVoxels.getLowerCorner().getZ());
51 
52  uint32_t material = 0;
53 
54  if(m_funcIsQuadNeededCallback(m_volData->getVoxelAt(x,y,z), m_volData->getVoxelAt(x+1,y,z), material))
55  {
56  uint32_t v0 = m_meshCurrent->addVertex(PositionMaterialNormal(Vector3DFloat(regX + 0.5f, regY - 0.5f, regZ - 0.5f), Vector3DFloat(1.0f, 0.0f, 0.0f), static_cast<float>(material)));
57  uint32_t v1 = m_meshCurrent->addVertex(PositionMaterialNormal(Vector3DFloat(regX + 0.5f, regY - 0.5f, regZ + 0.5f), Vector3DFloat(1.0f, 0.0f, 0.0f), static_cast<float>(material)));
58  uint32_t v2 = m_meshCurrent->addVertex(PositionMaterialNormal(Vector3DFloat(regX + 0.5f, regY + 0.5f, regZ - 0.5f), Vector3DFloat(1.0f, 0.0f, 0.0f), static_cast<float>(material)));
59  uint32_t v3 = m_meshCurrent->addVertex(PositionMaterialNormal(Vector3DFloat(regX + 0.5f, regY + 0.5f, regZ + 0.5f), Vector3DFloat(1.0f, 0.0f, 0.0f), static_cast<float>(material)));
60 
61  m_meshCurrent->addTriangleCubic(v0,v2,v1);
62  m_meshCurrent->addTriangleCubic(v1,v2,v3);
63  }
64  if(m_funcIsQuadNeededCallback(m_volData->getVoxelAt(x+1,y,z), m_volData->getVoxelAt(x,y,z), material))
65  {
66  uint32_t v0 = m_meshCurrent->addVertex(PositionMaterialNormal(Vector3DFloat(regX + 0.5f, regY - 0.5f, regZ - 0.5f), Vector3DFloat(-1.0f, 0.0f, 0.0f), static_cast<float>(material)));
67  uint32_t v1 = m_meshCurrent->addVertex(PositionMaterialNormal(Vector3DFloat(regX + 0.5f, regY - 0.5f, regZ + 0.5f), Vector3DFloat(-1.0f, 0.0f, 0.0f), static_cast<float>(material)));
68  uint32_t v2 = m_meshCurrent->addVertex(PositionMaterialNormal(Vector3DFloat(regX + 0.5f, regY + 0.5f, regZ - 0.5f), Vector3DFloat(-1.0f, 0.0f, 0.0f), static_cast<float>(material)));
69  uint32_t v3 = m_meshCurrent->addVertex(PositionMaterialNormal(Vector3DFloat(regX + 0.5f, regY + 0.5f, regZ + 0.5f), Vector3DFloat(-1.0f, 0.0f, 0.0f), static_cast<float>(material)));
70 
71  m_meshCurrent->addTriangleCubic(v0,v1,v2);
72  m_meshCurrent->addTriangleCubic(v1,v3,v2);
73  }
74 
75  if(m_funcIsQuadNeededCallback(m_volData->getVoxelAt(x,y,z), m_volData->getVoxelAt(x,y+1,z), material))
76  {
77  uint32_t v0 = m_meshCurrent->addVertex(PositionMaterialNormal(Vector3DFloat(regX - 0.5f, regY + 0.5f, regZ - 0.5f), Vector3DFloat(0.0f, 1.0f, 0.0f), static_cast<float>(material)));
78  uint32_t v1 = m_meshCurrent->addVertex(PositionMaterialNormal(Vector3DFloat(regX - 0.5f, regY + 0.5f, regZ + 0.5f), Vector3DFloat(0.0f, 1.0f, 0.0f), static_cast<float>(material)));
79  uint32_t v2 = m_meshCurrent->addVertex(PositionMaterialNormal(Vector3DFloat(regX + 0.5f, regY + 0.5f, regZ - 0.5f), Vector3DFloat(0.0f, 1.0f, 0.0f), static_cast<float>(material)));
80  uint32_t v3 = m_meshCurrent->addVertex(PositionMaterialNormal(Vector3DFloat(regX + 0.5f, regY + 0.5f, regZ + 0.5f), Vector3DFloat(0.0f, 1.0f, 0.0f), static_cast<float>(material)));
81 
82  m_meshCurrent->addTriangleCubic(v0,v1,v2);
83  m_meshCurrent->addTriangleCubic(v1,v3,v2);
84  }
85  if(m_funcIsQuadNeededCallback(m_volData->getVoxelAt(x,y+1,z), m_volData->getVoxelAt(x,y,z), material))
86  {
87  uint32_t v0 = m_meshCurrent->addVertex(PositionMaterialNormal(Vector3DFloat(regX - 0.5f, regY + 0.5f, regZ - 0.5f), Vector3DFloat(0.0f, -1.0f, 0.0f), static_cast<float>(material)));
88  uint32_t v1 = m_meshCurrent->addVertex(PositionMaterialNormal(Vector3DFloat(regX - 0.5f, regY + 0.5f, regZ + 0.5f), Vector3DFloat(0.0f, -1.0f, 0.0f), static_cast<float>(material)));
89  uint32_t v2 = m_meshCurrent->addVertex(PositionMaterialNormal(Vector3DFloat(regX + 0.5f, regY + 0.5f, regZ - 0.5f), Vector3DFloat(0.0f, -1.0f, 0.0f), static_cast<float>(material)));
90  uint32_t v3 = m_meshCurrent->addVertex(PositionMaterialNormal(Vector3DFloat(regX + 0.5f, regY + 0.5f, regZ + 0.5f), Vector3DFloat(0.0f, -1.0f, 0.0f), static_cast<float>(material)));
91 
92  m_meshCurrent->addTriangleCubic(v0,v2,v1);
93  m_meshCurrent->addTriangleCubic(v1,v2,v3);
94  }
95 
96  if(m_funcIsQuadNeededCallback(m_volData->getVoxelAt(x,y,z), m_volData->getVoxelAt(x,y,z+1), material))
97  {
98  uint32_t v0 = m_meshCurrent->addVertex(PositionMaterialNormal(Vector3DFloat(regX - 0.5f, regY - 0.5f, regZ + 0.5f), Vector3DFloat(0.0f, 0.0f, 1.0f), static_cast<float>(material)));
99  uint32_t v1 = m_meshCurrent->addVertex(PositionMaterialNormal(Vector3DFloat(regX - 0.5f, regY + 0.5f, regZ + 0.5f), Vector3DFloat(0.0f, 0.0f, 1.0f), static_cast<float>(material)));
100  uint32_t v2 = m_meshCurrent->addVertex(PositionMaterialNormal(Vector3DFloat(regX + 0.5f, regY - 0.5f, regZ + 0.5f), Vector3DFloat(0.0f, 0.0f, 1.0f), static_cast<float>(material)));
101  uint32_t v3 = m_meshCurrent->addVertex(PositionMaterialNormal(Vector3DFloat(regX + 0.5f, regY + 0.5f, regZ + 0.5f), Vector3DFloat(0.0f, 0.0f, 1.0f), static_cast<float>(material)));
102 
103  m_meshCurrent->addTriangleCubic(v0,v2,v1);
104  m_meshCurrent->addTriangleCubic(v1,v2,v3);
105  }
106  if(m_funcIsQuadNeededCallback(m_volData->getVoxelAt(x,y,z+1), m_volData->getVoxelAt(x,y,z), material))
107  {
108  uint32_t v0 = m_meshCurrent->addVertex(PositionMaterialNormal(Vector3DFloat(regX - 0.5f, regY - 0.5f, regZ + 0.5f), Vector3DFloat(0.0f, 0.0f, -1.0f), static_cast<float>(material)));
109  uint32_t v1 = m_meshCurrent->addVertex(PositionMaterialNormal(Vector3DFloat(regX - 0.5f, regY + 0.5f, regZ + 0.5f), Vector3DFloat(0.0f, 0.0f, -1.0f), static_cast<float>(material)));
110  uint32_t v2 = m_meshCurrent->addVertex(PositionMaterialNormal(Vector3DFloat(regX + 0.5f, regY - 0.5f, regZ + 0.5f), Vector3DFloat(0.0f, 0.0f, -1.0f), static_cast<float>(material)));
111  uint32_t v3 = m_meshCurrent->addVertex(PositionMaterialNormal(Vector3DFloat(regX + 0.5f, regY + 0.5f, regZ + 0.5f), Vector3DFloat(0.0f, 0.0f, -1.0f), static_cast<float>(material)));
112 
113  m_meshCurrent->addTriangleCubic(v0,v1,v2);
114  m_meshCurrent->addTriangleCubic(v1,v3,v2);
115  }
116  }
117  }
118  }
119 
120  m_meshCurrent->m_Region = m_regSizeInVoxels;
121 
122  m_meshCurrent->m_vecLodRecords.clear();
123  LodRecord lodRecord;
124  lodRecord.beginIndex = 0;
125  lodRecord.endIndex = m_meshCurrent->getNoOfIndices();
126  m_meshCurrent->m_vecLodRecords.push_back(lodRecord);
127  }
128 }
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