private static Vector3f parseVertex(String line) {
        String[] xyz = line.split(" ");
        float x = Float.valueOf(xyz[1]);
        float y = Float.valueOf(xyz[2]);
        float z = Float.valueOf(xyz[3]);
        return new Vector3f(x, y, z);
    }

    private static Vector3f parseNormal(String line) {
        String[] xyz = line.split(" ");
        float x = Float.valueOf(xyz[1]);
        float y = Float.valueOf(xyz[2]);
        float z = Float.valueOf(xyz[3]);
        return new Vector3f(x, y, z);
    }

    private static Vector2f parseTextureCoordinate(String line) {
        String[] xy = line.split(" ");
        float x = Float.valueOf(xy[1]);
        float y = Float.valueOf(xy[2]);
        //float z = Float.valueOf(xy[3]);
        return new Vector2f(x, y);
    }

    private static Model.Face parseFace(boolean hasNormals, String line) {
        String[] faceIndices = line.split(" ");
        int[] vertexIndicesArray = {Integer.parseInt(faceIndices[1].split("/")[0]),
                Integer.parseInt(faceIndices[2].split("/")[0]), Integer.parseInt(faceIndices[3].split("/")[0])};
        if (hasNormals) {
            int[] normalIndicesArray = new int[3];
            normalIndicesArray[0] = Integer.parseInt(faceIndices[1].split("/")[2]);
            normalIndicesArray[1] = Integer.parseInt(faceIndices[2].split("/")[2]);
            normalIndicesArray[2] = Integer.parseInt(faceIndices[3].split("/")[2]);
            return new Model.Face(vertexIndicesArray, normalIndicesArray);
        } else {
            return new Model.Face((vertexIndicesArray));
        }
    }

    public static Model loadModel(File f) throws IOException {
        BufferedReader reader = new BufferedReader(new FileReader(f));
        Model m = new Model();
        String line;
        while ((line = reader.readLine()) != null) {
            String prefix = line.split(" ")[0];
            if (prefix.equals("#")) {
                continue;
            } else if (prefix.equals("v")) {
                m.getVertices().add(parseVertex(line));
            } else if (prefix.equals("vn")) {
                m.getNormals().add(parseNormal(line));
            } else if (prefix.equals("f")) {
                m.getFaces().add(parseFace(m.hasNormals(), line));
            }else if (prefix.equals("f")) {
                m.getFaces().add(parseFace(m.hasNormals(), line));
            } else {
                continue;
            }
        }
        reader.close();
        return m;
    }