hello! I was studying OBJLoader example from Three.js example and I just put my own model in it and it shows error!! which is :
TypeError: Cannot read property ‘traverse’ of undefined
at Group.traverse (three.module.js:6910)
at client.js:74
at Object.onLoad (OBJLoader.js:457)
at XMLHttpRequest. (three.module.js:36508)
and here is my code
import * as THREE from '../build/three.module.js';
import { OrbitControls } from './jsm/controls/OrbitControls.js';
import { OBJLoader } from './jsm/loaders/OBJLoader.js';
import { RGBELoader } from './jsm/loaders/RGBELoader.js';
var container;
var params = {
projection: 'normal',
autoRotate: true,
reflectivity: 1.0,
background: false,
exposure: 1.0,
gemColor: 'Green'
};
var camera, scene, renderer, objects = [];
var gemBackMaterial, gemFrontMaterial;
var hdrCubeRenderTarget;
init();
animate();
function init() {
container = document.createElement( 'div' );
document.body.appendChild( container );
camera = new THREE.PerspectiveCamera( 40, window.innerWidth / window.innerHeight, 1, 1000 );
camera.position.set( 0.0, - 10, 20 * 3.5 );
scene = new THREE.Scene();
scene.background = new THREE.Color( 0x000000 );
renderer = new THREE.WebGLRenderer( { antialias: true } );
gemBackMaterial = new THREE.MeshPhysicalMaterial( {
map: null,
color: 'white',
metalness: 1,
roughness: 0,
opacity: 0.5,
side: THREE.BackSide,
transparent: true,
envMapIntensity: 5,
premultipliedAlpha: true
// TODO: Add custom blend mode that modulates background color by this materials color.
} );
gemFrontMaterial = new THREE.MeshPhysicalMaterial( {
map: null,
color: 'white',
metalness: 0,
roughness: 0,
opacity: 0.25,
side: THREE.FrontSide,
transparent: true,
envMapIntensity: 10,
premultipliedAlpha: true
} );
var manager = new THREE.LoadingManager();
manager.onProgress = function ( item, loaded, total ) {
console.log( item, loaded, total );
};
var loader = new OBJLoader( manager );
loader.load( 'textures/sculptures/sculpture_1.obj', function ( object ) {
object.traverse( function ( child ) {
if ( child instanceof THREE.Mesh ) {
child.material = gemBackMaterial;
var second = child.clone();
second.material = gemFrontMaterial;
var parent = new THREE.Group();
parent.add( second );
parent.add( child );
scene.add( parent );
objects.push( parent );
}
} );
} );
new RGBELoader()
.setDataType( THREE.UnsignedByteType )
.setPath( 'textures/' )
.load( 'royal_esplanade_1k.hdr', function ( hdrEquirect ) {
hdrCubeRenderTarget = pmremGenerator.fromEquirectangular( hdrEquirect );
pmremGenerator.dispose();
gemFrontMaterial.envMap = gemBackMaterial.envMap = hdrCubeRenderTarget.texture;
gemFrontMaterial.needsUpdate = gemBackMaterial.needsUpdate = true;
hdrEquirect.dispose();
} );
var pmremGenerator = new THREE.PMREMGenerator( renderer );
pmremGenerator.compileEquirectangularShader();
// Lights
scene.add( new THREE.AmbientLight( 0x222222 ) );
var pointLight1 = new THREE.PointLight( 0xffffff );
pointLight1.position.set( 150, 10, 0 );
pointLight1.castShadow = false;
scene.add( pointLight1 );
var pointLight2 = new THREE.PointLight( 0xffffff );
pointLight2.position.set( - 150, 0, 0 );
scene.add( pointLight2 );
var pointLight3 = new THREE.PointLight( 0xffffff );
pointLight3.position.set( 0, - 10, - 150 );
scene.add( pointLight3 );
var pointLight4 = new THREE.PointLight( 0xffffff );
pointLight4.position.set( 0, 0, 150 );
scene.add( pointLight4 );
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( window.innerWidth, window.innerHeight );
renderer.shadowMap.enabled = true;
container.appendChild( renderer.domElement );
renderer.outputEncoding = THREE.sRGBEncoding;
var controls = new OrbitControls( camera, renderer.domElement );
controls.minDistance = 20;
controls.maxDistance = 200;
window.addEventListener( 'resize', onWindowResize, false );
}
function onWindowResize() {
var width = window.innerWidth;
var height = window.innerHeight;
camera.aspect = width / height;
camera.updateProjectionMatrix();
renderer.setSize( width, height );
}
//
function animate() {
requestAnimationFrame( animate );
// stats.begin();
render();
// stats.end();
}
function render() {
if ( gemBackMaterial !== undefined && gemFrontMaterial !== undefined ) {
gemFrontMaterial.reflectivity = gemBackMaterial.reflectivity = params.reflectivity;
var newColor = gemBackMaterial.color;
switch ( params.gemColor ) {
case 'White': newColor = new THREE.Color( 0x888888 ); break;
}
gemBackMaterial.color = gemFrontMaterial.color = newColor;
}
renderer.toneMappingExposure = params.exposure;
camera.lookAt( scene.position );
if ( params.autoRotate ) {
for ( var i = 0, l = objects.length; i < l; i ++ ) {
var object = objects[ i ];
object.rotation.y += 0.005;
}
}
renderer.render( scene, camera );
}
Thanks!
