allVertices.clear();
    allVertexNormals.clear();
    allIndices.clear();
	std::ifstream file_(path);
	std::string line;
	if (file_.is_open()) {
		while (!file_.eof()) {
			std::getline(file_, line);

			std::string header = line.substr(0, line.find_first_of(" ",0));

			if (!header.compare("#")) continue;

			if (!header.compare("v")) {
				glm::vec3 vertex;
				std::stringstream ss (line.substr(2));
				ss >> vertex.x >> vertex.y >> vertex.z;
				allVertices.push_back(vertex);
			}
			if (!header.compare("vn")) {
				glm::vec3 normal;
				std::stringstream ss(line.substr(3));
				ss >> normal.x >> normal.y >> normal.z;
				allVertexNormals.push_back(normal);
			}
			if (!header.compare("f")) {
				std::stringstream ss(line.substr(2));
				int i;

				while (ss >> i) {
					allIndices.push_back(i);
					//skip all space and /
					while(ss.peek() == ' ' || ss.peek() == '/'){
						ss.ignore();
					}
				}
			}
		}
	}
	else {
		std::cout << "Fail to open" << std::endl;
		return false;
	}