// VRcore.js import * as THREE from 'three'; const OrbitControls = require('three-orbit-controls')(THREE) let Scene, Camera, Renderer, Controls, loopID; function createScene({domContainer = document.body, fov = 50,far = 1000}){ if (!(domContainer instanceof HTMLElement)) {  throw new Error('domContainer is not a HTMLElement!'); } // 初始化 scene Scene = new THREE.Scene(); // 初始化 camera Camera = new THREE.PerspectiveCamera(fov, domContainer.clientWidth / domContainer.clientHeight, 1, far); Camera.position.set( 200, 200, 200 ); Camera.lookAt(Scene.position); Scene.add(Camera); // 初始化 renderer Renderer = new THREE.WebGLRenderer({ canvas: domContainer, antialias: true, alpha: true } ); Renderer.clear(); Renderer.setClearColor( 0xeeeeee, 1); // 更改渲染器顏色 Renderer.setSize(domContainer.clientWidth, domContainer.clientHeight); Renderer.shadowMap.Enabled = true; Renderer.setPixelRatio(domContainer.devicePixelRatio); initVR(); } function initVR() {  // 初始化控制器  Controls = new OrbitControls(Camera, Renderer.domElement);;  Controls.addEventListener('change', render);  Controls.enableZoom = true; } function render() { Renderer.render(Scene, Camera); } function renderStart(callback) { loopID = 0; // 記錄循環(huán)幾次，后面有與清除場(chǎng)景中的物體 if (loopID === -1) return; let animate = function(){  loopID = requestAnimationFrame(animate);  callback();  Controls.update();  render(); } animate(); } // 暫停動(dòng)畫(huà)渲染 function renderStop() { if (loopID !== -1) {  window.cancelAnimationFrame(loopID);  loopID = -1; } } // 回收當(dāng)前場(chǎng)景 function clearScene() { for(let i = Scene.children.length - 1; i >= 0; i-- ) {  Scene.remove(Scene.children[i]); } } // 清理頁(yè)面 function cleanPage() { renderStop(); clearScene(); } export { Scene, Camera, Renderer, Controls, createScene, initVR, renderStart, renderStop, clearScene, cleanPage }

 // VRpage.js import * as THREE from 'three'; import * as VRcore from './VRcore.js'; export default class VRpage { constructor(options) {  // 創(chuàng)建場(chǎng)景  VRcore.createScene(options);  this.start();  this.loadPage(); } loadPage() {  VRcore.renderStart(() => this.update());  this.loaded(); } initPage() {  this.loadPage();  this.start(); } start() {} loaded() {} update() {} }

 // page.js import * as THREE from 'three'; import VRpage from '../../utils/VRpage.js'; import * as VRcore from '../../utils/VRcore.js'; export default class Page extends VRpage { start() { // 啟動(dòng)渲染之前，創(chuàng)建場(chǎng)景3d模型  let geometry = new THREE.CubeGeometry(100,100,100);  let material = new THREE.MeshLambertMaterial( { color:0x0000ff} );  this.box = new THREE.Mesh(geometry,material);  this.box.position.set(3, -2, -3);  const PointLight = new THREE.PointLight(0xffffff);  PointLight.position.set(500, 500, 500);  const AmbientLight = new THREE.AmbientLight( 0x404040 ); // soft white light  VRcore.Scene.add(PointLight);  VRcore.Scene.add(AmbientLight);  VRcore.Scene.background = new THREE.Color( 0xeeeeee ); // 更改場(chǎng)景背景色  VRcore.Scene.add(this.box); } update() {  this.box.rotation.y += 0.01; } }

 // index.js import React, { Component } from 'react'; import PropTypes from 'prop-types'; import Page from './Page.js'; class Oho extends Component { constructor() {  super();  this.init = this.init.bind(this); } componentDidMount() {  const dom = document.querySelector('#Oho');  this.init(dom); } init(dom) {  const page = new Page({domContainer: dom}); } render() {  return (  <div className="three-demo">   <canvas id="Oho" ref="camera"></canvas>  </div>  ); } } export default Oho;