问浏览器WebGL Three.js中未出现OBJ文件

EN

THREE.WebGLRenderer 68 three.min.js:520
Loading: skin.jpg 1 2  app.html:42
Loading: ucd.obj 2 2   app.html:42

            //Variables
            var container, stats;
            var camera, scene, renderer;
            var mouseX = 0, mouseY = 0;
            var windowHalfX = window.innerWidth/2;
            var windowHalfY = window.innerHeight/2;
            init();
            animate();

            //Initialisation
            function init(){
                container = document.createElement('div');
                document.body.appendChild(container);
                camera = new THREE.PerspectiveCamera(45, window.innerWidth / window.innerHeight, 1, 2000);
                camera.position.z = 100;

                //scene
                scene = new THREE.Scene();

                //Light
                var ambient = new THREE.AmbientLight(0x101030);
                scene.add(ambient);

                var directionalLight = new THREE.DirectionalLight(0xffeedd);
                directionalLight.position.set(0,0,1);
                scene.add(directionalLight);

                //Texture
                var manager = new THREE.LoadingManager();
                manager.onProgress = function ( item, loaded, total ) {
                    console.log("Loading: " + item, loaded, total );
                };

                var texture = new THREE.Texture();
                var loader = new THREE.ImageLoader(manager);
                loader.load('skin.jpg', function(image){
                    texture.image = image;
                    texture.needsUpdate = true;
                });

                //Model
                var loader = new THREE.OBJLoader(manager);
                loader.load('ucd.obj', function(object){

                    object.traverse(function(child){
                            if(child instanceof THREE.Mesh){
                                child.material.map = texture;
                            }
                    }); 

                    object.position.y = -80;
                    scene.add(object);

                });

                //Renderer
                renderer = new THREE.WebGLRenderer();
                renderer.setSize(window.innerWidth, window.innerHeight);
                container.appendChild(renderer.domElement);


                //Event Listeners
                document.addEventListener('mousemove', onDocumentMouseMove, false);
                window.addEventListener('resize', onWindowResize, false);
            }

            function onWindowResize(){
                windowHalfX = window.innerWidth/2;
                windowHalfY = window.innerHeight/2;
                camera.aspect = window.innerWidth/window.innerHeight;
                camera.updateProjectionMatrix();
                renderer.setSize(window.innerWidth, window.innerHeight);
            }

            function onDocumentMouseMove(event){
                mouseX = (event.clientX - windowHalfX)/2;
                mouseY = (event.clientY - windowHalfY)/2;
            }

            //Animation
            function animate(){
                requestAnimationFrame(animate);
                render();
            }

            function render(){
                camera.position.x += (mouseX - camera.position.x) * .05;
                camera.position.y += (mouseY - camera.position.y) * .05;
                camera.lookAt(scene.position);
                renderer.render(scene, camera);
            }