1 | #include "VisibilitySolutionConverter.h"
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2 | #include "Triangle3.h"
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3 | #include "Vector3.h"
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4 | #include "gzstream.h"
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5 | #include <iostream>
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6 | #include <queue>
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7 |
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8 |
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9 | using namespace std;
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10 |
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11 | // MAGIC of all bin exports
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12 | #ifndef MAGIC
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13 | #define MAGIC 0x827923
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14 | #endif
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15 |
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16 | #define BVH_VERSION 2.1
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17 |
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18 | #define TYPE_INTERIOR -2
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19 | #define TYPE_LEAF -3
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20 |
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21 | //const int maxVertices = 20000000;
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22 |
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23 |
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24 |
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25 | static string ReplaceSuffix(const string &str,
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26 | const string &a,
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27 | const string &b)
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28 | {
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29 | string result = str;
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30 |
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31 | int pos = (int)str.rfind(a, (int)str.size() - 1);
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32 | if (pos == str.size() - a.size())
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33 | {
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34 | result.replace(pos, a.size(), b);
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35 | }
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36 |
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37 | return result;
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38 | }
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39 |
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40 |
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41 | static void LoadIndices(char *str,
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42 | const VertexArray &vertices,
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43 | const VertexArray &normals,
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44 | const vector<pair<float, float> > &texCoords,
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45 | VertexArray &faceVertices,
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46 | VertexArray &faceNormals,
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47 | vector<TexCoord> &faceTexCoords
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48 | )
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49 | {
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50 | vector<string> triples;
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51 |
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52 | char *next_token;
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53 |
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54 | // extract the triples of the form v/t/n v/t/n ...
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55 | char *pch = strtok_s(str + 1, " ", &next_token);
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56 |
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57 | while (pch)
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58 | {
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59 | string s(pch);
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60 | //s += "\n",
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61 | triples.push_back(s);
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62 |
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63 | pch = strtok_s(NULL, " ", &next_token);
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64 | }
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65 |
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66 | vector<int> indices;
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67 | vector<int> nIndices;
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68 | vector<int> tIndices;
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69 |
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70 | char seps[] = " /\t\n";
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71 |
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72 | for (size_t i = 0; i < triples.size(); ++ i)
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73 | {
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74 | static int dummy = 0;
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75 |
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76 | size_t found;
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77 | found = triples[i].find_first_of(seps);
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78 | size_t prevfound = 0;
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79 | // vertex, normal, texture indices
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80 | string str = triples[i].substr(prevfound, found);
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81 |
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82 | int index = (int)strtol(str.c_str(), NULL, 10) - 1;
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83 |
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84 | int tIndex = index;
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85 | int nIndex = index;
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86 |
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87 | prevfound = found;
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88 | found = triples[i].find_first_of(seps, found + 1);
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89 |
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90 | if (found != string::npos)
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91 | {
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92 | str = triples[i].substr(prevfound, found);
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93 |
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94 | int idx = (int)strtol(str.c_str(), NULL, 10) - 1;
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95 | if (idx > 0) tIndex = idx;
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96 | }
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97 |
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98 | if ((found + 1) < triples[i].size())
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99 | {
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100 | str = triples[i].substr(found + 1);
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101 |
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102 | int idx = (int)strtol(str.c_str(), NULL, 10) - 1;
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103 | if (idx > 0) nIndex = idx;
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104 | }
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105 |
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106 | // store indices
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107 | if (index >= 0)
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108 | {
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109 | indices.push_back(index);
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110 | nIndices.push_back(nIndex);
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111 | tIndices.push_back(tIndex);
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112 | }
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113 |
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114 | // new triangle found
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115 | if (indices.size() > 2)
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116 | {
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117 | int idx1 = 0;
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118 | int idx2 = (int)indices.size() - 2;
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119 | int idx3 = (int)indices.size() - 1;
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120 |
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121 | faceVertices.push_back(vertices[indices[idx1]]);
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122 | faceVertices.push_back(vertices[indices[idx2]]);
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123 | faceVertices.push_back(vertices[indices[idx3]]);
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124 |
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125 |
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126 | if (!normals.empty())
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127 | {
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128 | faceNormals.push_back(normals[nIndices[idx1]]);
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129 | faceNormals.push_back(normals[nIndices[idx2]]);
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130 | faceNormals.push_back(normals[nIndices[idx3]]);
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131 | }
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132 | else
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133 | {
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134 | // no face normals? => create normals
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135 | const CHCDemoEngine::Triangle3
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136 | tri(vertices[indices[idx1]],
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137 | vertices[indices[idx2]],
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138 | vertices[indices[idx3]]);
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139 |
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140 | const CHCDemoEngine::Vector3 n = tri.GetNormal();
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141 |
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142 | faceNormals.push_back(n);
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143 | faceNormals.push_back(n);
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144 | faceNormals.push_back(n);
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145 | }
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146 |
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147 | if (!texCoords.empty())
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148 | {
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149 | faceTexCoords.push_back(texCoords[tIndices[idx1]]);
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150 | faceTexCoords.push_back(texCoords[tIndices[idx2]]);
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151 | faceTexCoords.push_back(texCoords[tIndices[idx3]]);
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152 | }
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153 | }
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154 | }
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155 | }
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156 |
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157 |
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158 | VisibilitySolutionConverter::VisibilitySolutionConverter()
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159 | {}
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160 |
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161 |
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162 | VisibilitySolutionConverter::~VisibilitySolutionConverter()
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163 | {
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164 | for (size_t i = 0; i < mGeometry.size(); ++ i)
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165 | {
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166 | delete [] mGeometry[i]->mVertices;
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167 | delete [] mGeometry[i]->mNormals;
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168 | delete [] mGeometry[i]->mTexCoords;
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169 |
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170 | delete mGeometry[i];
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171 | }
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172 |
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173 | mGeometry.clear();
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174 | }
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175 |
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176 |
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177 | void VisibilitySolutionConverter::LoadShape(const VertexArray &vertices,
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178 | const VertexArray &normals,
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179 | const vector<TexCoord> &texCoords)
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180 | {
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181 | int numElements = (int)vertices.size();
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182 | Geometry *geom = new Geometry();
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183 |
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184 | // convert the triangles to geometry
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185 | geom->mVertices = new CHCDemoEngine::Vector3[numElements];
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186 | geom->mNormals = new CHCDemoEngine::Vector3[numElements];
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187 | geom->mTexCoords = new TexCoord[numElements];
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188 |
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189 | geom->mVertexCount = numElements;
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190 | geom->mTexcoordCount = (int)texCoords.size();
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191 |
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192 | //cout << "number of vertices=" << numElements << endl;
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193 |
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194 | for (int i = 0; i < numElements; ++ i)
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195 | {
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196 | // convert to our camera system: change y and z
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197 | geom->mVertices[i].x = vertices[i].x;
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198 | geom->mVertices[i].y = -vertices[i].z;
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199 | geom->mVertices[i].z = vertices[i].y;
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200 |
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201 | geom->mNormals[i].x = normals[i].x;
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202 | geom->mNormals[i].y = -normals[i].z;
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203 | geom->mNormals[i].z = normals[i].y;
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204 |
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205 | if (i < geom->mTexcoordCount)
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206 | {
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207 | geom->mTexCoords[i].first = texCoords[i].first;
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208 | geom->mTexCoords[i].second = texCoords[i].second;
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209 | }
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210 | }
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211 |
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212 | mGeometry.push_back(geom);
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213 | }
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214 |
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215 |
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216 | bool VisibilitySolutionConverter::Convert(const std::string &sceneInputFilename,
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217 | const std::string &sceneOutputFilename,
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218 | const std::string &bvhInputFilename,
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219 | const std::string &bvhOutputFilename)
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220 | {
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221 | mNumShapes = 0;
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222 |
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223 | // delete previous geometry
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224 | for (size_t i = 0; i < mGeometry.size(); ++ i)
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225 | {
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226 | delete [] mGeometry[i]->mVertices;
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227 | delete [] mGeometry[i]->mNormals;
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228 | delete [] mGeometry[i]->mTexCoords;
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229 |
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230 | delete mGeometry[i];
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231 | }
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232 |
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233 | mGeometry.clear();
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234 |
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235 | if (!LoadSolution(bvhInputFilename))
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236 | {
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237 | cerr << "could not read solution file" << endl;
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238 | return false;
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239 | }
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240 |
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241 | if (!ReadScene(sceneInputFilename))
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242 | {
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243 | cerr << "could not read file" << endl;
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244 | return false;
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245 | }
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246 |
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247 | // update bvh bounding boxes with loaded geometry
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248 | UpdateNodeBox(mRoot);
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249 |
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250 | cout << "writing scene" << endl;
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251 |
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252 | if (!WriteScene(sceneOutputFilename))
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253 | {
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254 | cerr << "could not write file" << endl;
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255 | return false;
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256 | }
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257 |
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258 | cout << "writing bvh" << endl;
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259 |
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260 | if (!WriteBvh(bvhOutputFilename))
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261 | {
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262 | cerr << "could not write bvh!" << endl;
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263 | return false;
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264 | }
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265 |
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266 | return true;
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267 | }
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268 |
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269 |
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270 | bool VisibilitySolutionConverter::ReadScene(const string &filename)
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271 | {
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272 | VertexArray vertices;
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273 | VertexArray normals;
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274 | vector<TexCoord> texCoords;
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275 |
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276 | if (ReadSimpleObj(filename, vertices, normals, texCoords))
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277 | //if (ReadObj(filename, vertices, normals, texCoords))
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278 | {
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279 | ConstructBvhObjects(vertices, normals, texCoords);
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280 | return true;
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281 | }
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282 |
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283 | return false;
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284 | }
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285 |
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286 |
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287 | bool VisibilitySolutionConverter::ReadObj(const string &filename,
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288 | VertexArray &vertices,
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289 | VertexArray &normals,
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290 | vector<TexCoord> &texcoords)
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291 | {
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292 | FILE *file;
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293 |
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294 | if ((file = fopen(filename.c_str(), "r")) == NULL) return false;
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295 |
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296 | VertexArray tempVertices;
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297 | VertexArray tempNormals;
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298 | vector<TexCoord> tempTexcoords;
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299 |
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300 | vector<int> indices;
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301 |
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302 | int line = 0;
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303 | const int len = 10000;
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304 | char str[len];
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305 |
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306 | while (fgets(str, len, file) != NULL)
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307 | {
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308 | if (line % 500000 == 0)
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309 | cout << line << " " << str << endl;
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310 |
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311 | ++ line;
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312 |
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313 | switch (str[0])
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314 | {
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315 | case 'v': // vertex or normal
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316 | {
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317 | float x, y, z;
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318 |
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319 | //if (tempVertices.size() >= maxVertices * 3) continue;
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320 |
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321 | switch (str[1])
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322 | {
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323 | case 'n' :
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324 | sscanf(str + 2, "%f %f %f", &x, &y, &z);
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325 | tempNormals.push_back(CHCDemoEngine::Vector3(x, y, z));
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326 | break;
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327 | case 't':
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328 | sscanf(str + 2, "%f %f", &x, &y);
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329 | tempTexcoords.push_back(pair<float, float>(x, y));
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330 | break;
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331 | default:
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332 | sscanf(str + 1, "%f %f %f", &x, &y, &z);
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333 | //const float scale = 5e-3f;
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334 | const float scale = 0.1f;
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335 | tempVertices.push_back(CHCDemoEngine::Vector3(x * scale, y * scale, z * scale));
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336 | //cout <<"v " << x << " " << y << " "<< z << " ";
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337 | }
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338 | break;
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339 | }
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340 | case 'f':
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341 | {
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342 | //////////
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343 | //-- indices in the current line
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344 |
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345 | //if (tempVertices.size() >= maxVertices * 3) continue;
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346 | LoadIndices(str,
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347 | tempVertices, tempNormals, tempTexcoords,
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348 | vertices, normals, texcoords);
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349 |
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350 | break;
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351 | }
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352 | break;
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353 | default:
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354 | // throw away line
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355 | break;
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356 | }
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357 | }
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358 |
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359 | fclose(file);
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360 |
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361 | return !vertices.empty();
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362 | }
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363 |
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364 |
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365 | bool VisibilitySolutionConverter::ReadSimpleObj(const string &filename,
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366 | VertexArray &vertices,
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367 | VertexArray &normals,
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368 | vector<TexCoord> &texcoords)
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369 | {
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370 | const string binFilename = ReplaceSuffix(filename, ".obj", ".bn");
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371 |
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372 | if (!ReadBinObj(binFilename, vertices, 1))
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373 | {
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374 | cout << "binary dump " << binFilename << " not available, loading ascii obj" << endl;
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375 |
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376 | FILE *file;
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377 | if ((file = fopen(filename.c_str(), "r")) == NULL) return false;
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378 |
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379 | int line = 0;
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380 | const int len = 10000;
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381 | char str[len];
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382 |
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383 | while (fgets(str, len, file) != NULL)
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384 | {
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385 | if (line % 500000 == 0)
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386 | cout << line << " " << str << endl;
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387 |
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388 | ++ line;
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389 |
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390 | switch (str[0])
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391 | {
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392 | case 'v': // vertex or normal
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393 | {
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394 | float x, y, z;
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395 |
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396 | sscanf(str + 1, "%f %f %f", &x, &y, &z);
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397 | const float scale = 0.1f;
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398 | vertices.push_back(CHCDemoEngine::Vector3(x * scale, y * scale, z * scale));
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399 | break;
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400 | }
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401 | default:
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402 | // throw away line
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403 | break;
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404 | }
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405 | }
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406 |
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407 | fclose(file);
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408 |
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409 | cout << "dumping " << vertices.size() << " to binary " << binFilename << endl;
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410 | ExportBinObj(binFilename, vertices);
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411 | }
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412 |
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413 | for (size_t i = 0; i < vertices.size(); i += 3)
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414 | {
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415 | // no face normals? => create normals
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416 | const CHCDemoEngine::Triangle3 tri(vertices[i + 0],
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417 | vertices[i + 1],
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418 | vertices[i + 2]);
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419 |
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420 | const CHCDemoEngine::Vector3 n = tri.GetNormal();
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421 |
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422 | normals.push_back(n);
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423 | normals.push_back(n);
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424 | normals.push_back(n);
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425 | }
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426 |
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427 | return !vertices.empty();
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428 | }
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429 |
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430 |
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431 |
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432 | static inline float RandomColor(float x)
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433 | {
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434 | return x + (1.0f - x) * (float)rand() / RAND_MAX;
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435 | }
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436 |
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437 |
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438 | void VisibilitySolutionConverter::WriteGeometry(ogzstream &str, Geometry *geom)
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439 | {
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440 | int vertexCount = geom->mVertexCount;
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441 | str.write(reinterpret_cast<char *>(&vertexCount), sizeof(int));
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442 |
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443 | str.write(reinterpret_cast<char *>(geom->mVertices), sizeof(CHCDemoEngine::Vector3) * vertexCount);
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444 | str.write(reinterpret_cast<char *>(geom->mNormals), sizeof(CHCDemoEngine::Vector3) * vertexCount);
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445 |
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446 | int texCoordCount = 0;//geom->mTexcoordCount;
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447 | str.write(reinterpret_cast<char *>(&texCoordCount), sizeof(int));
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448 |
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449 | if (texCoordCount)
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450 | {
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451 | str.write(reinterpret_cast<char *>(geom->mTexCoords), sizeof(float) * texCoordCount * 2);
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452 | }
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453 |
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454 | ///////
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455 | //-- texture
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456 |
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457 | int texId = -1;
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458 | str.write(reinterpret_cast<char *>(&texId), sizeof(int));
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459 |
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460 | bool alphaTestEnabled = false;
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461 | bool cullFaceEnabled = true;
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462 |
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463 | str.write(reinterpret_cast<char *>(&alphaTestEnabled), sizeof(bool));
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464 | str.write(reinterpret_cast<char *>(&cullFaceEnabled), sizeof(bool));
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465 |
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466 | // material
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467 | bool hasMaterial = true;
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468 |
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469 | str.write(reinterpret_cast<char *>(&hasMaterial), sizeof(bool));
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470 |
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471 | if (hasMaterial)
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472 | {
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473 | CHCDemoEngine::Vector3 ambient, diffuse, spec, emm;
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474 |
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475 | ambient.x = ambient.y = ambient.z = 0.2f;
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476 | //diffuse.x = diffuse.y = diffuse.z = 1.0f;
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477 |
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478 | diffuse.x = RandomColor(0.5f);
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479 | diffuse.y = RandomColor(0.5f);
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480 | diffuse.z = RandomColor(0.5f);
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481 |
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482 | spec.x = spec.y = spec.z = .0f;
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483 | emm = spec;
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484 |
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485 | // only write rgb part of the material
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486 | str.write(reinterpret_cast<char *>(&ambient), sizeof(CHCDemoEngine::Vector3));
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487 | str.write(reinterpret_cast<char *>(&diffuse), sizeof(CHCDemoEngine::Vector3));
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488 | str.write(reinterpret_cast<char *>(&spec), sizeof(CHCDemoEngine::Vector3));
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489 | str.write(reinterpret_cast<char *>(&emm), sizeof(CHCDemoEngine::Vector3));
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490 | }
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491 | }
|
---|
492 |
|
---|
493 |
|
---|
494 | bool VisibilitySolutionConverter::WriteScene(const string &filename)
|
---|
495 | {
|
---|
496 | ogzstream ofile(filename.c_str());
|
---|
497 |
|
---|
498 | if (!ofile.is_open())
|
---|
499 | return false;
|
---|
500 |
|
---|
501 |
|
---|
502 | int textureCount = 0;
|
---|
503 | ofile.write(reinterpret_cast<char *>(&textureCount), sizeof(int));
|
---|
504 |
|
---|
505 |
|
---|
506 | ///////////
|
---|
507 | //-- write shapes
|
---|
508 |
|
---|
509 | int numShapes = (int)mGeometry.size();
|
---|
510 | ofile.write(reinterpret_cast<char *>(&numShapes), sizeof(int));
|
---|
511 |
|
---|
512 | vector<Geometry *>::const_iterator it, it_end = mGeometry.end();
|
---|
513 |
|
---|
514 | for (it = mGeometry.begin(); it != it_end; ++ it)
|
---|
515 | {
|
---|
516 | WriteGeometry(ofile, *it);
|
---|
517 | }
|
---|
518 |
|
---|
519 |
|
---|
520 | int entityCount = numShapes;
|
---|
521 | ofile.write(reinterpret_cast<char *>(&entityCount), sizeof(int));
|
---|
522 |
|
---|
523 |
|
---|
524 | //////////
|
---|
525 | //-- write single scene entity for each shape
|
---|
526 |
|
---|
527 | // all shapes belong to this scene entity
|
---|
528 | for (int i = 0; i < numShapes; ++ i)
|
---|
529 | {
|
---|
530 | // no transformation
|
---|
531 | bool hasTrafo = false;
|
---|
532 | ofile.write(reinterpret_cast<char *>(&hasTrafo), sizeof(bool));
|
---|
533 |
|
---|
534 | // a dummy lod
|
---|
535 | int numLODs = 1;
|
---|
536 | ofile.write(reinterpret_cast<char *>(&numLODs), sizeof(int));
|
---|
537 |
|
---|
538 | float dist = 0;
|
---|
539 | ofile.write(reinterpret_cast<char *>(&dist), sizeof(float));
|
---|
540 |
|
---|
541 | int shapesPerEnt = 1;
|
---|
542 | ofile.write(reinterpret_cast<char *>(&shapesPerEnt), sizeof(int));
|
---|
543 |
|
---|
544 | int shapeId = i;
|
---|
545 | ofile.write(reinterpret_cast<char *>(&shapeId), sizeof(int));
|
---|
546 | }
|
---|
547 |
|
---|
548 | return true;
|
---|
549 | }
|
---|
550 |
|
---|
551 |
|
---|
552 | void VisibilitySolutionConverter::ConstructBvhObjects(const VertexArray &vertices,
|
---|
553 | const VertexArray &normals,
|
---|
554 | const vector<TexCoord> &texCoords)
|
---|
555 | {
|
---|
556 | VertexArray _vertices;
|
---|
557 | VertexArray _normals;
|
---|
558 | vector<TexCoord> _texCoords;
|
---|
559 |
|
---|
560 | mGeometry.reserve(mBvhLeaves.size());
|
---|
561 |
|
---|
562 | mNumShapes = (int)mBvhLeaves.size();
|
---|
563 |
|
---|
564 | for (size_t i = 0; i < mBvhLeaves.size(); ++ i)
|
---|
565 | {
|
---|
566 | BvhLeaf *node = mBvhLeaves[i];
|
---|
567 |
|
---|
568 | for (int j = node->first; j <= node->last; ++ j)
|
---|
569 | {
|
---|
570 | const int idx = 3 * mGlobalTriangleIds[j];
|
---|
571 |
|
---|
572 | for (int k = 0; k < 3; ++ k)
|
---|
573 | {
|
---|
574 | _vertices.push_back(vertices[idx + k]);
|
---|
575 | _normals.push_back(normals[idx + k]);
|
---|
576 | //_texCoords.push_back(texCoords[idx + k]);
|
---|
577 | }
|
---|
578 | }
|
---|
579 |
|
---|
580 | LoadShape(_vertices, _normals, _texCoords);
|
---|
581 |
|
---|
582 | node->geometry = mGeometry.back();
|
---|
583 |
|
---|
584 | _vertices.clear();
|
---|
585 | _normals.clear();
|
---|
586 | _texCoords.clear();
|
---|
587 | }
|
---|
588 | }
|
---|
589 |
|
---|
590 |
|
---|
591 | bool VisibilitySolutionConverter::ReadBvh(FILE *fr)
|
---|
592 | {
|
---|
593 | int buffer[6];
|
---|
594 | fread(buffer, sizeof(int), 6, fr);
|
---|
595 |
|
---|
596 | if (buffer[0] != MAGIC)
|
---|
597 | {
|
---|
598 | cerr << "Error: Wrong file type" << endl;
|
---|
599 | return false;
|
---|
600 | }
|
---|
601 |
|
---|
602 | if (buffer[1] != (int)(1000 * BVH_VERSION))
|
---|
603 | {
|
---|
604 | cerr << "Error: Wrong BVH version" << endl;
|
---|
605 | return false;
|
---|
606 | }
|
---|
607 |
|
---|
608 | // load triangle ids
|
---|
609 | size_t numTriangles = buffer[2];
|
---|
610 |
|
---|
611 | for (size_t i = 0; i < numTriangles; ++i)
|
---|
612 | {
|
---|
613 | int id;
|
---|
614 | fread(&id, sizeof(int), 1, fr);
|
---|
615 | mGlobalTriangleIds.push_back(id);
|
---|
616 | //triangles[i] = scene->triangles[id];
|
---|
617 | }
|
---|
618 |
|
---|
619 | const size_t numNodes = buffer[5];
|
---|
620 |
|
---|
621 | mNumNodes = 0; // this was set to 1 in constructor!
|
---|
622 |
|
---|
623 | mRoot = LoadNode(fr, 0);
|
---|
624 |
|
---|
625 | if (mNumNodes != numNodes)
|
---|
626 | {
|
---|
627 | cerr << "Warning: Loaded " << mNumNodes <<
|
---|
628 | " bvh nodes instead of " << buffer[5] << endl;
|
---|
629 | }
|
---|
630 |
|
---|
631 | fclose(fr);
|
---|
632 |
|
---|
633 | return true;
|
---|
634 | }
|
---|
635 |
|
---|
636 |
|
---|
637 | void VisibilitySolutionConverter::UpdateLeafBox(BvhLeaf *leaf)
|
---|
638 | {
|
---|
639 | leaf->box.Initialize();
|
---|
640 |
|
---|
641 | Geometry *geom = leaf->geometry;
|
---|
642 |
|
---|
643 | for (size_t i = 0; i < geom->mVertexCount; ++ i)
|
---|
644 | {
|
---|
645 | CHCDemoEngine::Vector3 v = geom->mVertices[i];
|
---|
646 | leaf->box.Include(v);
|
---|
647 | }
|
---|
648 | }
|
---|
649 |
|
---|
650 |
|
---|
651 | BvhNode *VisibilitySolutionConverter::LoadNode(FILE *fr, int depth)
|
---|
652 | {
|
---|
653 | ++ mNumNodes;
|
---|
654 |
|
---|
655 | int buffer[4];
|
---|
656 | fread(buffer, sizeof(int), 4, fr);
|
---|
657 |
|
---|
658 | if (buffer[2] != -1)
|
---|
659 | {
|
---|
660 | BvhInterior *interior = new BvhInterior();
|
---|
661 |
|
---|
662 | interior->first = buffer[0];
|
---|
663 | interior->last = buffer[1];
|
---|
664 | interior->axis = buffer[2];
|
---|
665 | interior->id = buffer[3];
|
---|
666 | interior->depth = depth;
|
---|
667 |
|
---|
668 | BvhNode *front, *back;
|
---|
669 |
|
---|
670 | front = LoadNode(fr, depth + 1);
|
---|
671 | back = LoadNode(fr, depth + 1);
|
---|
672 |
|
---|
673 | front->parent = interior;
|
---|
674 | back->parent = interior;
|
---|
675 |
|
---|
676 | interior->front = front;
|
---|
677 | interior->back = back;
|
---|
678 |
|
---|
679 | return (BvhNode *)interior;
|
---|
680 | }
|
---|
681 | else
|
---|
682 | {
|
---|
683 | // leaf
|
---|
684 | BvhLeaf *leaf = new BvhLeaf();
|
---|
685 |
|
---|
686 | leaf->first = buffer[0];
|
---|
687 | leaf->last = buffer[1];
|
---|
688 | leaf->axis = buffer[2];
|
---|
689 | leaf->id = buffer[3];
|
---|
690 |
|
---|
691 | leaf->depth = depth;
|
---|
692 |
|
---|
693 | mBvhLeaves.push_back(leaf);
|
---|
694 |
|
---|
695 | return (BvhNode *)leaf;
|
---|
696 | }
|
---|
697 | }
|
---|
698 |
|
---|
699 |
|
---|
700 | bool VisibilitySolutionConverter::ReadDummyTree(FILE *fr)
|
---|
701 | {
|
---|
702 | int buffer[256];
|
---|
703 | fread(buffer, sizeof(int), 3, fr);
|
---|
704 |
|
---|
705 | // read dummy bounding box
|
---|
706 | float dummy[6];
|
---|
707 | fread(dummy, sizeof(float) * 6, 1, fr);
|
---|
708 |
|
---|
709 | int stack = 1;
|
---|
710 |
|
---|
711 | // read dummy tree
|
---|
712 | while (stack)
|
---|
713 | {
|
---|
714 | int axis;
|
---|
715 | fread(&axis, sizeof(int), 1, fr);
|
---|
716 | -- stack;
|
---|
717 |
|
---|
718 | if (axis != - 1)
|
---|
719 | {
|
---|
720 | float dummy;
|
---|
721 | fread(&dummy, sizeof(float), 1, fr);
|
---|
722 |
|
---|
723 | stack += 2;
|
---|
724 | }
|
---|
725 | }
|
---|
726 |
|
---|
727 | return true;
|
---|
728 | }
|
---|
729 |
|
---|
730 |
|
---|
731 |
|
---|
732 | bool VisibilitySolutionConverter::LoadSolution(const string &filename)
|
---|
733 | {
|
---|
734 | FILE *fr = fopen(filename.c_str(), "rb");
|
---|
735 |
|
---|
736 | cerr << "Info: Loading visibility solution from file '" + filename + "'" << endl;
|
---|
737 |
|
---|
738 | if (fr == NULL)
|
---|
739 | {
|
---|
740 | cerr << "Error: Cannot open file for reading" << endl;
|
---|
741 | return false;
|
---|
742 | }
|
---|
743 |
|
---|
744 | float totalSamples, totalTime;
|
---|
745 |
|
---|
746 | fread(&totalSamples, sizeof(float), 1, fr);
|
---|
747 | fread(&totalTime, sizeof(float), 1, fr);
|
---|
748 |
|
---|
749 | // just need to convert objects => read dummy visibility tree
|
---|
750 | bool ok = ReadDummyTree(fr);
|
---|
751 |
|
---|
752 | // read bvh to optain objects (= the leaves of the bvh)
|
---|
753 | if (ok) ok = ReadBvh(fr);
|
---|
754 |
|
---|
755 | fclose(fr);
|
---|
756 |
|
---|
757 | if (ok)
|
---|
758 | cout << "Info: visibility solution loaded" << endl;
|
---|
759 | else
|
---|
760 | cout << "Info: loading visibility solution failed" << endl;
|
---|
761 |
|
---|
762 | return true;
|
---|
763 | }
|
---|
764 |
|
---|
765 |
|
---|
766 | bool VisibilitySolutionConverter::ReadBinObj(const string &filename,
|
---|
767 | VertexArray &vertices,
|
---|
768 | float scale)
|
---|
769 | {
|
---|
770 | igzstream inStream(filename.c_str());
|
---|
771 |
|
---|
772 | if (!inStream.is_open()) return false;
|
---|
773 |
|
---|
774 | cout << "binary obj dump available, loading " << filename.c_str() << endl;
|
---|
775 |
|
---|
776 | // read in triangle size
|
---|
777 | int numTriangles;
|
---|
778 |
|
---|
779 | const int t = 500000;
|
---|
780 | inStream.read(reinterpret_cast<char *>(&numTriangles), sizeof(int));
|
---|
781 | vertices.reserve(numTriangles * 3);
|
---|
782 | cout << "loading " << numTriangles * 3 << " vertices ("
|
---|
783 | << numTriangles * 3 * sizeof(CHCDemoEngine::Vector3) / (1024 * 1024) << " MB)" << endl;
|
---|
784 |
|
---|
785 | int i = 0;
|
---|
786 |
|
---|
787 | while (1)
|
---|
788 | {
|
---|
789 | CHCDemoEngine::Vector3 v;
|
---|
790 | inStream.read(reinterpret_cast<char *>(&v), sizeof(CHCDemoEngine::Vector3));
|
---|
791 |
|
---|
792 | // end of file reached
|
---|
793 | if (inStream.eof()) break;
|
---|
794 |
|
---|
795 | //v *= scale;
|
---|
796 | vertices.push_back(v);
|
---|
797 |
|
---|
798 | if (((i ++) % t) == 0)
|
---|
799 | cout << "\r" << i << "/" << numTriangles * 3 << "\r";
|
---|
800 | }
|
---|
801 |
|
---|
802 | cout << "finished loading vertices" << endl;
|
---|
803 |
|
---|
804 | if (i != numTriangles * 3)
|
---|
805 | cerr << "warning: " << numTriangles * 3 << " != " << i << endl;
|
---|
806 |
|
---|
807 | inStream.close();
|
---|
808 |
|
---|
809 | return true;
|
---|
810 | }
|
---|
811 |
|
---|
812 |
|
---|
813 | bool VisibilitySolutionConverter::ExportBinObj(const string &filename,
|
---|
814 | const VertexArray &vertices)
|
---|
815 | {
|
---|
816 | ogzstream ofile(filename.c_str());
|
---|
817 | if (!ofile.is_open()) return false;
|
---|
818 |
|
---|
819 | int numTriangles = (int)vertices.size() / 3;
|
---|
820 |
|
---|
821 | ofile.write(reinterpret_cast<char *>(&numTriangles), sizeof(int));
|
---|
822 |
|
---|
823 | VertexArray::const_iterator it, it_end = vertices.end();
|
---|
824 |
|
---|
825 | for (it = vertices.begin(); it != it_end; ++ it)
|
---|
826 | {
|
---|
827 | CHCDemoEngine::Vector3 v = *it;
|
---|
828 | ofile.write(reinterpret_cast<char *>(&v), sizeof(CHCDemoEngine::Vector3));
|
---|
829 | }
|
---|
830 |
|
---|
831 | cout << "exported " << numTriangles * 3 << " vertices" << endl;
|
---|
832 |
|
---|
833 | ofile.close();
|
---|
834 |
|
---|
835 | return true;
|
---|
836 | }
|
---|
837 |
|
---|
838 |
|
---|
839 | void VisibilitySolutionConverter::WriteNextNode(ogzstream &stream,
|
---|
840 | BvhNode *node)
|
---|
841 | {
|
---|
842 | int nodeType;
|
---|
843 |
|
---|
844 | if (!node->IsLeaf())
|
---|
845 | nodeType = TYPE_LEAF;
|
---|
846 | else
|
---|
847 | nodeType = TYPE_INTERIOR;
|
---|
848 |
|
---|
849 | stream.write(reinterpret_cast<char *>(&nodeType), sizeof(int));
|
---|
850 |
|
---|
851 | CHCDemoEngine::Vector3 bMin = node->box.Min();
|
---|
852 | CHCDemoEngine::Vector3 bMax = node->box.Max();
|
---|
853 |
|
---|
854 | stream.write(reinterpret_cast<char *>(&(node->first)), sizeof(int));
|
---|
855 | stream.write(reinterpret_cast<char *>(&(node->last)), sizeof(int));
|
---|
856 |
|
---|
857 | stream.write(reinterpret_cast<char *>(&bMin), sizeof(CHCDemoEngine::Vector3));
|
---|
858 | stream.write(reinterpret_cast<char *>(&bMin), sizeof(CHCDemoEngine::Vector3));
|
---|
859 | }
|
---|
860 |
|
---|
861 |
|
---|
862 | void VisibilitySolutionConverter::UpdateNodeBox(BvhNode *node)
|
---|
863 | {
|
---|
864 | if (!node->IsLeaf())
|
---|
865 | {
|
---|
866 | BvhInterior *interior = (BvhInterior *)node;
|
---|
867 | node->box = Union(interior->front->box, interior->back->box);
|
---|
868 |
|
---|
869 | UpdateNodeBox(interior->front);
|
---|
870 | UpdateNodeBox(interior->back);
|
---|
871 | }
|
---|
872 | else
|
---|
873 | {
|
---|
874 | UpdateLeafBox((BvhLeaf *)node);
|
---|
875 | }
|
---|
876 | }
|
---|
877 |
|
---|
878 |
|
---|
879 | bool VisibilitySolutionConverter::WriteBvh(const string &filename)
|
---|
880 | {
|
---|
881 | std::queue<BvhNode *> tQueue;
|
---|
882 | ogzstream stream(filename.c_str());
|
---|
883 |
|
---|
884 | if (!stream.is_open()) return NULL;
|
---|
885 |
|
---|
886 | cout << "loading bvh" << endl;
|
---|
887 |
|
---|
888 | WriteNextNode(stream, mRoot);
|
---|
889 |
|
---|
890 | tQueue.push(mRoot);
|
---|
891 |
|
---|
892 | while (!tQueue.empty())
|
---|
893 | {
|
---|
894 | BvhNode *node = tQueue.front();
|
---|
895 | tQueue.pop();
|
---|
896 |
|
---|
897 | if (!node->IsLeaf())
|
---|
898 | {
|
---|
899 | BvhInterior *interior = static_cast<BvhInterior *>(node);
|
---|
900 |
|
---|
901 | BvhNode *front = interior->front;
|
---|
902 | BvhNode *back = interior->back;
|
---|
903 |
|
---|
904 | WriteNextNode(stream, front);
|
---|
905 | WriteNextNode(stream, back);
|
---|
906 |
|
---|
907 | tQueue.push(front);
|
---|
908 | tQueue.push(back);
|
---|
909 | }
|
---|
910 | }
|
---|
911 |
|
---|
912 | return true;
|
---|
913 | } |
---|