如何使用Three.js加载obj和mtl文件

使用Three.js加载obj和mtl文件方法：
var onProgress = function(xhr) {
if (xhr.lengthComputable) {
var percentComplete = xhr.loaded / xhr.total * 100;
console.log(Math.round(percentComplete, 2) + '% downloaded');
}
};

var onError = function(xhr) {};

THREE.Loader.Handlers.add(/\.dds$/i, new THREE.DDSLoader());

var mtlLoader = new THREE.MTLLoader();
mtlLoader.setPath('/uploads/160601/obj/');
mtlLoader.load('egg.mtl', function(materials) {

materials.preload();

var objLoader = new THREE.OBJLoader();
objLoader.setMaterials(materials);
objLoader.setPath('/uploads/160601/obj/');
objLoader.load('egg.obj', function(object) {

object.position.y = -0.5;
scene.add(object);

}, onProgress, onError);

});