Method OBJLoader

tutorials/common/scenegraph/obj_loader.cpp:148–277

  };

  OBJLoader::OBJLoader(const FileName &fileName, const bool subdivMode, const bool combineIntoSingleObject) 
    : group(new SceneGraph::GroupNode), path(fileName.path()), subdivMode(subdivMode)
  {
    /* open file */
    std::ifstream cin;
    cin.open(fileName.c_str());
    if (!cin.is_open()) {
      THROW_RUNTIME_ERROR("cannot open " + fileName.str());
      return;
    }

    /* generate default material */
    Ref<SceneGraph::MaterialNode> defaultMaterial = new OBJMaterial("default");
    curMaterialName = "default";
    curMaterial = defaultMaterial;

    while (cin.peek() != -1)
    {
      /* load next multiline */
      std::string line; std::getline(cin,line);
      while (!line.empty() && line[line.size()-1] == '\\') {
	line[line.size()-1] = ' ';
	std::string next_line; std::getline(cin,next_line);
	if (next_line.empty()) break;
	line += next_line;
      }
      const char* token = trimEnd(line.c_str() + strspn(line.c_str(), " \t"));
      if (token[0] == 0) continue;

      /*! parse position */
      if (token[0] == 'v' && isSep(token[1])) { 
        v.push_back(getVec3f(token += 2)); continue;
      }

      /* parse normal */
      if (token[0] == 'v' && token[1] == 'n' && isSep(token[2])) { 
        vn.push_back(getVec3f(token += 3)); 
        continue; 
      }

      /* parse texcoord */
      if (token[0] == 'v' && token[1] == 't' && isSep(token[2])) { vt.push_back(getVec2f(token += 3)); continue; }

      /*! parse face */
      if (token[0] == 'f' && isSep(token[1]))
      {
        parseSep(token += 1);

        std::vector<Vertex> face;
        while (token[0]) {
	  Vertex vtx = getUInt3(token);
          face.push_back(vtx);
          parseSepOpt(token);
        }
        curGroup.emplace_back(face);
        continue;
      }