摘要：這是一篇關(guān)于怎么樣基于進(jìn)行可配置的的對(duì)象創(chuàng)建的文章項(xiàng)目地址編寫(xiě)一個(gè)的基類這是創(chuàng)建的一個(gè)基類其中包含了場(chǎng)景，相機(jī)，渲染器，控制器以及一些方法初始化初始化初始化更改渲染器顏色初始化控制器記錄循環(huán)幾次，后面有與清除場(chǎng)景中的物體暫停動(dòng)畫(huà)渲染

這是一篇關(guān)于怎么樣基于three.js進(jìn)行可配置的three.js的對(duì)象創(chuàng)建的文章
項(xiàng)目地址

這是創(chuàng)建的一個(gè)Three.js基類其中包含了場(chǎng)景，相機(jī)，渲染器，控制器以及一些方法

  // 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
  }

這是一個(gè)VRpage的基類，所有需要?jiǎng)?chuàng)建Three項(xiàng)目都需要繼承這個(gè)類，然后生成一個(gè)Three項(xiàng)目

  // 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() {}
  }

下面的文件是一個(gè)繼承了VRpage類的一個(gè)類，然后我們重寫(xiě)了start方法以及update方法，start方法中我們向場(chǎng)景中添加了一個(gè)正方體，update方法是我們給這個(gè)正方體的一個(gè)變形動(dòng)畫(huà)，他會(huì)結(jié)合VRcore.js里面的renderStart方法來(lái)進(jìn)行動(dòng)畫(huà)效果

  // 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;
    }
  }

這里我使用的是react的框架

  // 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 (
        

          
        
      );
    }
  }

  export default Oho;