1 | #include "stdafx.h" |
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2 | |
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3 | struct vertex { |
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4 | int pos, tc, normal, colour; |
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5 | |
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6 | bool operator<(const vertex &v) const { |
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7 | if (pos < v.pos) return true; |
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8 | if (pos > v.pos) return false; |
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9 | if (normal < v.normal) return true; |
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10 | if (normal > v.normal) return false; |
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11 | if (tc < v.tc) return true; |
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12 | if (tc > v.tc) return false; |
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13 | return colour < v.colour; |
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14 | } |
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15 | }; |
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16 | |
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17 | // VRML face |
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18 | struct face { |
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19 | std::vector<int> indices; |
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20 | }; |
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21 | |
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22 | // OGRE face |
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23 | struct triangle { |
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24 | int vertices[3]; |
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25 | }; |
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26 | |
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27 | typedef std::vector<Vector3> Vec3Vec; |
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28 | typedef std::vector<vertex> VertVec; |
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29 | typedef std::vector<face> FaceVec; |
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30 | typedef std::vector<triangle> TriVec; |
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31 | typedef std::vector<int> IntVec; |
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32 | typedef std::map<vertex, int> VertMap; |
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33 | |
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34 | // traverse the scene graph looking for Shapes |
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35 | void parseFile(Mesh *, const vrmllib::file &); |
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36 | void parseNode(Mesh *, const vrmllib::node *, Matrix4 = Matrix4::IDENTITY); |
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37 | |
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38 | // generate a SubMesh from a Shape |
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39 | void parseShape(Mesh *, const Shape *, Matrix4); |
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40 | |
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41 | // helpers: |
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42 | Ogre::MaterialPtr parseMaterial(const Appearance *, const String &name); |
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43 | void parseFaces(FaceVec &, const IndexedFaceSet *); |
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44 | void triangulateAndExpand(TriVec &, VertVec &, const FaceVec &, const Shape *); |
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45 | void copyToSubMesh(SubMesh *, const TriVec &, const VertVec &, const Shape *, const Matrix4 &); |
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46 | |
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47 | // get the array index for a VRML vertex property |
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48 | int getIndex(const IntVec &coordIndex, const IntVec &, bool perVertex, int facenr, int vertnr); |
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49 | |
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50 | // used by findName* |
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51 | typedef std::map<const vrmllib::node *, String> NameMap; |
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52 | NameMap gNameMap; |
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53 | |
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54 | // find name of DEFined node |
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55 | const String *findName(const vrmllib::node *n); |
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56 | const String *findNameRecursive(const vrmllib::node *n); |
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57 | |
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58 | String gBaseName; // base name of the input file (no path or extension) |
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59 | |
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60 | // conversion functions: |
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61 | inline Vector3 vec(const vrmllib::vec3 &v) { return Vector3(v.x, v.y, v.z); } |
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62 | inline ColourValue col(const vrmllib::col3 &c) { return ColourValue(c.r, c.g, c.b); } |
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63 | inline void copyVec(Real *d, const Vector3 &s) { d[0] = s.x; d[1] = s.y; d[2] = s.z; } |
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64 | inline void copyVec(Real *d, const vec2 &s) { d[0] = s.x; d[1] = s.y; } |
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65 | |
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66 | Matrix4 transMat(vrmllib::vec3, bool inverse = false); |
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67 | Matrix4 scaleMat(vrmllib::vec3, bool inverse = false); |
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68 | Matrix4 rotMat(vrmllib::rot, bool inverse = false); |
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69 | |
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70 | int main(int argc, char **argv) |
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71 | { |
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72 | try |
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73 | { |
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74 | String inname, outname, path; |
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75 | |
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76 | if (argc != 2 && argc != 3) |
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77 | throw |
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78 | "Wrong number of arguments.\n" |
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79 | " Usage: VRML2mesh <input vrml file> [output mesh file]"; |
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80 | |
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81 | inname = argv[1]; |
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82 | |
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83 | // get base name |
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84 | gBaseName = inname; |
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85 | size_t p = gBaseName.find_last_of("/\\"); |
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86 | if (p != gBaseName.npos) { |
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87 | path.assign(gBaseName, 0, p+1); |
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88 | gBaseName.erase(0, p+1); |
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89 | } |
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90 | p = gBaseName.rfind('.'); |
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91 | if (p != gBaseName.npos) |
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92 | gBaseName.erase(p); |
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93 | |
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94 | if (argc == 3) |
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95 | outname = argv[2]; |
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96 | else |
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97 | outname = path + gBaseName + ".mesh"; |
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98 | |
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99 | LogManager log; |
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100 | log.createLog(path + "VRML2mesh.log"); |
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101 | |
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102 | Math math; |
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103 | ResourceGroupManager resGrpMgr; |
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104 | MaterialManager materialMgr; |
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105 | MeshSerializer meshSer; |
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106 | |
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107 | Mesh mesh("conversionTarget"); |
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108 | |
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109 | try { |
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110 | log.logMessage("Reading " + inname); |
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111 | |
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112 | // read VRML file |
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113 | std::ifstream infile(inname.c_str()); |
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114 | if (!infile.is_open()) |
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115 | throw "failed to open input file"; |
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116 | |
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117 | vrmllib::file vfile(infile); |
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118 | log.logMessage("Finished parsing VRML file"); |
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119 | |
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120 | // populate name map |
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121 | for (vrmllib::file::defs_t::iterator i=vfile.defs.begin(), e=vfile.defs.end(); i!=e; ++i) |
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122 | gNameMap[i->second] = i->first; |
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123 | |
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124 | // search from SubMeshes |
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125 | parseFile(&mesh, vfile); |
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126 | |
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127 | if (mesh.getNumSubMeshes() == 0) |
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128 | throw "No SubMeshes were generated, aborting."; |
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129 | |
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130 | log.logMessage("Exporting Mesh"); |
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131 | meshSer.exportMesh(&mesh, outname, true); |
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132 | |
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133 | log.logMessage("Done."); |
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134 | } |
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135 | catch (const char *e) { |
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136 | log.logMessage(LML_NORMAL, "Error: %s", e); |
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137 | return 1; |
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138 | } |
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139 | catch (std::exception &e) { |
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140 | log.logMessage(LML_NORMAL, "Exception: %s", e.what()); |
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141 | return 1; |
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142 | } |
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143 | catch (Exception &e) { |
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144 | log.logMessage("Exception: " + e.getFullDescription()); |
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145 | return 1; |
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146 | } |
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147 | } |
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148 | catch (Exception &e) { |
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149 | std::cerr << "Exception: " << e.getFullDescription() << std::endl; |
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150 | return 1; |
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151 | } |
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152 | catch (const char *e) { |
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153 | std::cerr << e << std::endl; |
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154 | return 1; |
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155 | } |
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156 | } |
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157 | |
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158 | void parseFile(Mesh *mesh, const vrmllib::file &file) |
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159 | { |
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160 | for (vrmllib::file::roots_t::const_iterator i=file.roots.begin(), e=file.roots.end(); i!=e; ++i) |
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161 | parseNode(mesh, *i); |
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162 | } |
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163 | |
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164 | void parseNode(Mesh *mesh, const vrmllib::node *n, Matrix4 m) |
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165 | { |
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166 | if (const Transform *tr = dynamic_cast<const Transform *>(n)) { |
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167 | // TODO: handle center, scaleOrientation |
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168 | |
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169 | Matrix4 trans; |
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170 | trans.makeTrans(vec(tr->translation)); |
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171 | |
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172 | Matrix4 scale = Matrix4::IDENTITY; |
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173 | scale[0][0] = tr->scale.x; |
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174 | scale[1][1] = tr->scale.y; |
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175 | scale[2][2] = tr->scale.z; |
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176 | |
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177 | Matrix3 rot3; |
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178 | rot3.FromAxisAngle(vec(tr->rotation.vector), tr->rotation.radians); |
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179 | Matrix4 rot = Matrix4::IDENTITY; |
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180 | rot = rot3; |
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181 | |
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182 | m = m * transMat(tr->translation) * transMat(tr->center) |
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183 | * rotMat(tr->rotation) * rotMat(tr->scaleOrientation) * scaleMat(tr->scale) |
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184 | * rotMat(tr->scaleOrientation, true) * transMat(tr->center, true); |
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185 | } |
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186 | |
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187 | if (const grouping_node *gn = dynamic_cast<const grouping_node *>(n)) { |
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188 | for (std::vector<vrmllib::node *>::const_iterator |
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189 | i=gn->children.begin(), e=gn->children.end(); i!=e; ++i) |
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190 | parseNode(mesh, *i, m); |
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191 | |
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192 | } else if (const Shape *sh = dynamic_cast<const Shape *>(n)) |
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193 | parseShape(mesh, sh, m); |
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194 | } |
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195 | |
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196 | void parseShape(Mesh *mesh, const Shape *sh, Matrix4 mat) |
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197 | { |
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198 | try |
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199 | { |
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200 | LogManager &log = LogManager::getSingleton(); |
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201 | log.logMessage("Found a Shape..."); |
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202 | |
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203 | IndexedFaceSet *ifs = dynamic_cast<IndexedFaceSet *>(sh->geometry); |
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204 | if (!ifs) |
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205 | throw "Geometry was not an IndexedFaceSet, keep looking"; |
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206 | |
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207 | Coordinate *coord = dynamic_cast<Coordinate *>(ifs->coord); |
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208 | if (!coord) |
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209 | throw "Invalid Coordinate node"; |
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210 | if (coord->point.empty()) |
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211 | throw "No coordinates found, ignoring this Shape"; |
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212 | |
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213 | SubMesh *sub; |
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214 | if (const String *name = findNameRecursive(sh)) { |
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215 | log.logMessage("Creating SubMesh: " + *name); |
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216 | sub = mesh->createSubMesh(*name); |
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217 | } else { |
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218 | log.logMessage("Creating unnamed SubMesh"); |
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219 | sub = mesh->createSubMesh(); |
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220 | } |
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221 | |
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222 | Appearance *app = dynamic_cast<Appearance *>(sh->appearance); |
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223 | TextureCoordinate *tcs = dynamic_cast<TextureCoordinate *>(ifs->texCoord); |
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224 | Normal *norm = dynamic_cast<Normal *>(ifs->normal); |
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225 | Color *color = dynamic_cast<Color *>(ifs->color); |
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226 | |
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227 | String message = "Found: geometry"; |
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228 | if (tcs) |
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229 | message += ", texcoords"; |
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230 | if (norm) |
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231 | message += ", normals"; |
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232 | if (color) |
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233 | message += ", colours"; |
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234 | log.logMessage(message); |
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235 | |
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236 | if (!tcs && !norm && !color) |
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237 | log.logMessage("Warning: OGRE will refuse to render SubMeshes that have neither\n" |
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238 | "\ttexture coordinates, normals or vertex colours."); |
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239 | |
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240 | if (!norm) { |
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241 | log.logMessage("Warning: No normals found.\n" |
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242 | "\tVRML dictates that normals should be generated, but this program\n" |
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243 | "\tdoes not do so. If you want the resulting mesh to contain normals,\n" |
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244 | "\tmake sure they are exported."); |
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245 | } |
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246 | |
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247 | // process material |
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248 | static std::map<Appearance *, Ogre::MaterialPtr> matMap; |
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249 | |
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250 | Ogre::MaterialPtr material = matMap[app]; |
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251 | if (!material->isNull() && app) { |
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252 | log.logMessage("Using material " + material->getName()); |
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253 | sub->setMaterialName(material->getName()); |
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254 | } else { |
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255 | String matName; |
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256 | const String *mn; |
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257 | if (mn = findName(app)) |
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258 | matName = *mn; |
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259 | else if (app && (mn = findName(app->material))) { |
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260 | static std::map<String, int> postfix; |
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261 | std::stringstream ss; |
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262 | int &num = postfix[*mn]; |
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263 | ss << *mn << '/' << num++; |
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264 | matName = ss.str(); |
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265 | } else { |
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266 | static int matNum; |
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267 | std::stringstream ss; |
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268 | ss << gBaseName << '/' << matNum++; |
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269 | matName = ss.str(); |
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270 | log.logMessage("No material name found, using " + matName); |
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271 | } |
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272 | log.logMessage("Reading material " + matName); |
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273 | |
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274 | material = parseMaterial(app, matName); |
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275 | |
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276 | sub->setMaterialName(matName); |
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277 | } |
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278 | |
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279 | FaceVec faces; |
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280 | parseFaces(faces, ifs); |
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281 | |
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282 | VertVec vertices; |
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283 | TriVec triangles; |
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284 | |
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285 | log.logMessage("Processing geometry..."); |
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286 | triangulateAndExpand(triangles, vertices, faces, sh); |
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287 | |
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288 | copyToSubMesh(sub, triangles, vertices, sh, mat); |
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289 | |
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290 | log.logMessage("Done with this SubMesh."); |
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291 | } |
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292 | catch (const char *e) { |
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293 | LogManager::getSingleton().logMessage(e); |
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294 | } |
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295 | } |
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296 | |
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297 | void copyToSubMesh(SubMesh *sub, const TriVec &triangles, const VertVec &vertices, |
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298 | const Shape *sh, const Matrix4 &mat) |
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299 | { |
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300 | IndexedFaceSet *ifs = dynamic_cast<IndexedFaceSet *>(sh->geometry); |
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301 | Coordinate *coord = dynamic_cast<Coordinate *>(ifs->coord); |
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302 | TextureCoordinate *tcs = dynamic_cast<TextureCoordinate *>(ifs->texCoord); |
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303 | Normal *norm = dynamic_cast<Normal *>(ifs->normal); |
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304 | Color *color = dynamic_cast<Color *>(ifs->color); |
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305 | |
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306 | int nvertices = vertices.size(); |
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307 | int nfaces = triangles.size(); |
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308 | |
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309 | GeometryData &geom = sub->geometry; |
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310 | sub->useSharedVertices = false; |
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311 | sub->numFaces = nfaces; |
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312 | sub->faceVertexIndices = new unsigned short[nfaces*3]; |
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313 | |
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314 | geom.hasColours = color; |
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315 | geom.hasNormals = norm; |
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316 | geom.numTexCoords = tcs ? 1 : 0; |
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317 | geom.numTexCoordDimensions[0] = 2; |
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318 | geom.numVertices = nvertices; |
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319 | |
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320 | geom.pVertices = new Real[nvertices*3]; |
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321 | if (tcs) |
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322 | geom.pTexCoords[0] = new Real[nvertices*2]; |
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323 | if (norm) |
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324 | geom.pNormals = new Real[nvertices*3]; |
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325 | if (color) |
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326 | geom.pColours = new unsigned long[nvertices]; |
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327 | |
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328 | Matrix3 normMat; |
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329 | mat.extract3x3Matrix(normMat); |
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330 | normMat = normMat.Inverse().Transpose(); |
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331 | |
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332 | // populate face list |
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333 | for (int i=0; i!=nfaces; ++i) { |
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334 | unsigned short *f = sub->faceVertexIndices + i*3; |
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335 | f[0] = triangles[i].vertices[0]; |
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336 | f[1] = triangles[i].vertices[1]; |
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337 | f[2] = triangles[i].vertices[2]; |
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338 | } |
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339 | |
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340 | // populate vertex arrays |
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341 | for (int i=0; i!=nvertices; ++i) { |
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342 | const vertex &v = vertices[i]; |
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343 | |
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344 | Real *pos = geom.pVertices + i*3; |
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345 | Real *tc = geom.pTexCoords[0] + i*2; |
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346 | Real *n = geom.pNormals + i*3; |
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347 | unsigned long *col = geom.pColours + i; |
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348 | |
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349 | copyVec(pos, mat * vec(coord->point[v.pos])); |
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350 | if (norm) { |
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351 | Vector3 t = normMat * vec(norm->vector[v.normal]); |
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352 | t.normalise(); |
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353 | copyVec(n, t); |
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354 | } |
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355 | if (tcs) |
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356 | copyVec(tc, tcs->point[v.tc]); |
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357 | if (color) { |
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358 | col3 c = color->color[v.colour]; |
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359 | ColourValue cv(c.r, c.g, c.b); |
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360 | *col = cv.getAsLongRGBA(); |
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361 | } |
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362 | } |
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363 | } |
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364 | |
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365 | void triangulateAndExpand(TriVec &triangles, VertVec &vertices, const FaceVec &faces, const Shape *sh) |
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366 | { |
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367 | IndexedFaceSet *ifs = dynamic_cast<IndexedFaceSet *>(sh->geometry); |
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368 | Coordinate *coord = dynamic_cast<Coordinate *>(ifs->coord); |
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369 | TextureCoordinate *tcs = dynamic_cast<TextureCoordinate *>(ifs->texCoord); |
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370 | Normal *norm = dynamic_cast<Normal *>(ifs->normal); |
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371 | Color *color = dynamic_cast<Color *>(ifs->color); |
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372 | |
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373 | VertMap vertexMap; |
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374 | |
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375 | // triangulate and expand vertices |
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376 | for (FaceVec::const_iterator f=faces.begin(), e=faces.end(); f!=e; ++f) { |
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377 | int faceNr = f - faces.begin(); |
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378 | int triVertNr = 0; |
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379 | int triVerts[2] = { -1, -1 }; |
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380 | for (IntVec::const_iterator i = f->indices.begin(), e=f->indices.end(); i!=e; ++i, ++triVertNr) { |
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381 | int triVertNr = i - f->indices.begin(); |
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382 | int index = *i; |
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383 | |
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384 | vertex vert; |
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385 | |
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386 | // get full indices for vertex data |
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387 | vert.pos = ifs->coordIndex[index]; |
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388 | vert.normal = norm ? getIndex(ifs->coordIndex, ifs->normalIndex, |
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389 | ifs->normalPerVertex, faceNr, index) : 0; |
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390 | vert.colour = color ? getIndex(ifs->coordIndex, ifs->colorIndex, |
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391 | ifs->colorPerVertex, faceNr, index) : 0; |
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392 | vert.tc = tcs ? getIndex(ifs->coordIndex, ifs->texCoordIndex, |
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393 | true, faceNr, index) : 0; |
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394 | |
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395 | // avoid duplication |
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396 | int nvert = vertexMap.size(); |
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397 | int &vpos = vertexMap[vert]; |
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398 | if (nvert != vertexMap.size()) { |
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399 | vpos = vertices.size(); |
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400 | vertices.push_back(vert); |
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401 | } |
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402 | |
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403 | // emit triangle (maybe) |
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404 | if (triVertNr == 0) |
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405 | triVerts[0] = vpos; |
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406 | else if (triVertNr == 1) |
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407 | triVerts[1] = vpos; |
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408 | else { |
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409 | triangle t; |
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410 | t.vertices[0] = triVerts[0]; |
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411 | t.vertices[1] = triVerts[1]; |
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412 | t.vertices[2] = vpos; |
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413 | |
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414 | if (!ifs->ccw) |
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415 | std::swap(t.vertices[1], t.vertices[2]); |
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416 | |
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417 | triangles.push_back(t); |
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418 | |
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419 | triVerts[1] = vpos; |
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420 | } |
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421 | } |
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422 | } |
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423 | } |
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424 | |
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425 | int getIndex(const IntVec &coordIndex, const IntVec &vec, bool perVertex, int facenr, int index) |
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426 | { |
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427 | if (!perVertex) { |
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428 | if (!vec.empty()) |
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429 | return vec[facenr]; |
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430 | else |
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431 | return facenr; |
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432 | } else { |
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433 | if (!vec.empty()) |
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434 | return vec[index]; |
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435 | else |
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436 | return coordIndex[index]; |
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437 | } |
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438 | } |
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439 | |
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440 | const String *findName(const vrmllib::node *n) |
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441 | { |
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442 | NameMap::const_iterator i = gNameMap.find(n); |
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443 | if (i == gNameMap.end()) |
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444 | return 0; |
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445 | else |
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446 | return &i->second; |
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447 | } |
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448 | |
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449 | const String *findNameRecursive(const vrmllib::node *n) |
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450 | { |
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451 | if (const String *name = findName(n)) |
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452 | return name; |
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453 | else if (n->parent) |
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454 | return findNameRecursive(n->parent); |
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455 | else |
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456 | return 0; |
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457 | } |
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458 | |
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459 | void parseFaces(FaceVec &faces, const IndexedFaceSet *ifs) |
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460 | { |
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461 | face f; |
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462 | for (IntVec::const_iterator i=ifs->coordIndex.begin(), e=ifs->coordIndex.end(); i!=e; ++i) { |
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463 | if (*i == -1) { |
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464 | faces.resize(faces.size()+1); |
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465 | faces.back().indices.swap(f.indices); |
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466 | } else |
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467 | f.indices.push_back(i - ifs->coordIndex.begin()); |
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468 | } |
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469 | if (!f.indices.empty()) { |
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470 | faces.resize(faces.size()+1); |
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471 | faces.back().indices.swap(f.indices); |
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472 | } |
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473 | } |
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474 | |
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475 | Ogre::MaterialPtr parseMaterial(const Appearance *app, const String &name) |
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476 | { |
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477 | vrmllib::Material *vm = app ? dynamic_cast<vrmllib::Material *>(app->material) : 0; |
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478 | vrmllib::ImageTexture *texture = app ? dynamic_cast<vrmllib::ImageTexture *>(app->texture) : 0; |
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479 | |
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480 | Ogre::MaterialPtr m = MaterialManager::getSingleton().create(name, |
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481 | ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME); |
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482 | |
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483 | ColourValue diffuse = texture ? ColourValue::White : col(vm->diffuseColor); |
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484 | // diffuse colour is unused by VRML when a texture is avaliable, |
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485 | // set to white to give the same effect in OGRE |
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486 | |
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487 | ColourValue a = diffuse; |
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488 | a.r *= vm->ambientIntensity; |
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489 | a.g *= vm->ambientIntensity; |
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490 | a.b *= vm->ambientIntensity; |
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491 | m->setAmbient(a); |
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492 | m->setDiffuse(diffuse); |
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493 | m->setSelfIllumination(col(vm->emissiveColor)); |
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494 | m->setShininess(vm->shininess); |
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495 | m->setSpecular(col(vm->specularColor)); |
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496 | |
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497 | m->setLightingEnabled(app); |
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498 | |
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499 | if (texture && !texture->url.empty()) { |
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500 | String texName = texture->url.front(); |
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501 | size_t p = texName.find_last_of("/\\"); |
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502 | if (p != texName.npos) { |
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503 | LogManager::getSingleton().logMessage("Stripping path from texture " + texName); |
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504 | texName.erase(0, p+1); |
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505 | } |
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506 | |
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507 | LogManager::getSingleton().logMessage("Adding texture layer for " + texName); |
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508 | |
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509 | Ogre::TextureUnitState *l = m->addTextureLayer(texName); |
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510 | l->setTextureAddressingMode(texture->repeatS ? |
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511 | Ogre::TextureUnitState::TAM_WRAP : Ogre::TextureUnitState::TAM_CLAMP); |
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512 | } |
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513 | |
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514 | return m; |
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515 | } |
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516 | |
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517 | Matrix4 transMat(vrmllib::vec3 v, bool inverse) |
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518 | { |
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519 | if (inverse) |
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520 | return Matrix4::getTrans(-v.x, -v.y, -v.z); |
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521 | else |
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522 | return Matrix4::getTrans(v.x, v.y, v.z); |
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523 | } |
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524 | |
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525 | Matrix4 scaleMat(vrmllib::vec3 v, bool inverse) |
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526 | { |
---|
527 | if (inverse) |
---|
528 | return Matrix4::getScale(1/v.x, 1/v.y, 1/v.z); |
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529 | else |
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530 | return Matrix4::getScale(v.x, v.y, v.z); |
---|
531 | } |
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532 | |
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533 | Matrix4 rotMat(vrmllib::rot r, bool inverse) |
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534 | { |
---|
535 | Matrix3 rot3; |
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536 | rot3.FromAxisAngle(vec(r.vector), inverse ? -r.radians : r.radians); |
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537 | Matrix4 rot = Matrix4::IDENTITY; |
---|
538 | rot = rot3; |
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539 | return rot; |
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540 | } |
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