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
|
---|
446 | return &i->second;
|
---|
447 | }
|
---|
448 |
|
---|
449 | const String *findNameRecursive(const vrmllib::node *n)
|
---|
450 | {
|
---|
451 | if (const String *name = findName(n))
|
---|
452 | return name;
|
---|
453 | else if (n->parent)
|
---|
454 | return findNameRecursive(n->parent);
|
---|
455 | else
|
---|
456 | return 0;
|
---|
457 | }
|
---|
458 |
|
---|
459 | void parseFaces(FaceVec &faces, const IndexedFaceSet *ifs)
|
---|
460 | {
|
---|
461 | face f;
|
---|
462 | for (IntVec::const_iterator i=ifs->coordIndex.begin(), e=ifs->coordIndex.end(); i!=e; ++i) {
|
---|
463 | if (*i == -1) {
|
---|
464 | faces.resize(faces.size()+1);
|
---|
465 | faces.back().indices.swap(f.indices);
|
---|
466 | } else
|
---|
467 | f.indices.push_back(i - ifs->coordIndex.begin());
|
---|
468 | }
|
---|
469 | if (!f.indices.empty()) {
|
---|
470 | faces.resize(faces.size()+1);
|
---|
471 | faces.back().indices.swap(f.indices);
|
---|
472 | }
|
---|
473 | }
|
---|
474 |
|
---|
475 | Ogre::MaterialPtr parseMaterial(const Appearance *app, const String &name)
|
---|
476 | {
|
---|
477 | vrmllib::Material *vm = app ? dynamic_cast<vrmllib::Material *>(app->material) : 0;
|
---|
478 | vrmllib::ImageTexture *texture = app ? dynamic_cast<vrmllib::ImageTexture *>(app->texture) : 0;
|
---|
479 |
|
---|
480 | Ogre::MaterialPtr m = MaterialManager::getSingleton().create(name,
|
---|
481 | ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME);
|
---|
482 |
|
---|
483 | ColourValue diffuse = texture ? ColourValue::White : col(vm->diffuseColor);
|
---|
484 | // diffuse colour is unused by VRML when a texture is avaliable,
|
---|
485 | // set to white to give the same effect in OGRE
|
---|
486 |
|
---|
487 | ColourValue a = diffuse;
|
---|
488 | a.r *= vm->ambientIntensity;
|
---|
489 | a.g *= vm->ambientIntensity;
|
---|
490 | a.b *= vm->ambientIntensity;
|
---|
491 | m->setAmbient(a);
|
---|
492 | m->setDiffuse(diffuse);
|
---|
493 | m->setSelfIllumination(col(vm->emissiveColor));
|
---|
494 | m->setShininess(vm->shininess);
|
---|
495 | m->setSpecular(col(vm->specularColor));
|
---|
496 |
|
---|
497 | m->setLightingEnabled(app);
|
---|
498 |
|
---|
499 | if (texture && !texture->url.empty()) {
|
---|
500 | String texName = texture->url.front();
|
---|
501 | size_t p = texName.find_last_of("/\\");
|
---|
502 | if (p != texName.npos) {
|
---|
503 | LogManager::getSingleton().logMessage("Stripping path from texture " + texName);
|
---|
504 | texName.erase(0, p+1);
|
---|
505 | }
|
---|
506 |
|
---|
507 | LogManager::getSingleton().logMessage("Adding texture layer for " + texName);
|
---|
508 |
|
---|
509 | Ogre::TextureUnitState *l = m->addTextureLayer(texName);
|
---|
510 | l->setTextureAddressingMode(texture->repeatS ?
|
---|
511 | Ogre::TextureUnitState::TAM_WRAP : Ogre::TextureUnitState::TAM_CLAMP);
|
---|
512 | }
|
---|
513 |
|
---|
514 | return m;
|
---|
515 | }
|
---|
516 |
|
---|
517 | Matrix4 transMat(vrmllib::vec3 v, bool inverse)
|
---|
518 | {
|
---|
519 | if (inverse)
|
---|
520 | return Matrix4::getTrans(-v.x, -v.y, -v.z);
|
---|
521 | else
|
---|
522 | return Matrix4::getTrans(v.x, v.y, v.z);
|
---|
523 | }
|
---|
524 |
|
---|
525 | Matrix4 scaleMat(vrmllib::vec3 v, bool inverse)
|
---|
526 | {
|
---|
527 | if (inverse)
|
---|
528 | return Matrix4::getScale(1/v.x, 1/v.y, 1/v.z);
|
---|
529 | else
|
---|
530 | return Matrix4::getScale(v.x, v.y, v.z);
|
---|
531 | }
|
---|
532 |
|
---|
533 | Matrix4 rotMat(vrmllib::rot r, bool inverse)
|
---|
534 | {
|
---|
535 | Matrix3 rot3;
|
---|
536 | rot3.FromAxisAngle(vec(r.vector), inverse ? -r.radians : r.radians);
|
---|
537 | Matrix4 rot = Matrix4::IDENTITY;
|
---|
538 | rot = rot3;
|
---|
539 | return rot;
|
---|
540 | }
|
---|