ThreeJS 官方案例学习（webgl_effects_stereo）

1.效果图

2.源码

<template><div><div id="container"></div></div>
</template>
<script>
import * as THREE from 'three';
// 导入控制器
import { OrbitControls } from 'three/examples/jsm/controls/OrbitControls';
// 引入房间环境，创建一个室内环境
import { RoomEnvironment } from 'three/examples/jsm/environments/RoomEnvironment.js';
// 导入性能监视器
import Stats from 'three/examples/jsm/libs/stats.module.js';
// 导入gltf载入库、模型加载器
import { GLTFLoader } from 'three/examples/jsm/loaders/GLTFLoader'
// 引入模型解压器
import { DRACOLoader } from 'three/examples/jsm/loaders/DRACOLoader'
//GUI界面
import { GUI } from 'three/examples/jsm/libs/lil-gui.module.min.js';
import gsap from 'gsap';
//双屏渲染插件
import { StereoEffect } from 'three/examples/jsm/effects/StereoEffect.js';//创建环境贴图(全景图)
const path = '/textures/cube/Park3Med/'
const format = '.jpg'
const urls = [path + 'px' + format, path + 'nx' + format,path + 'py' + format, path + 'ny' + format,path + 'pz' + format, path + 'nz' + format
]
const textureCube = new THREE.CubeTextureLoader().load(urls);
export default {data() {return {container: null, //界面需要渲染的容器scene: null,	// 场景对象camera: null, //相机对象renderer: null, //渲染器对象controller: null,	// 相机控件对象stats: null,// 性能监听器mixer: null,//动画混合器model: null,//导入的模型clock: new THREE.Clock(),// 创建一个clock对象，用于跟踪时间spheres: [],//小球集合// 鼠标移动位置mouseX: 0,mouseY: 0,// 窗口位移windowHalfX: 0,windowHalfY: 0,effect: null,//3D渲染对象};},mounted() {this.init()this.animate()  //如果引入了模型并存在动画，可在模型引入成功后加载动画window.addEventListener("resize", this.onWindowSize)window.addEventListener('mousemove', this.onDocumentMouseMove);},beforeUnmount() {console.log('beforeUnmount===============');// 组件销毁时置空this.container = nullthis.scene = nullthis.camera = nullthis.renderer = nullthis.controller = nullthis.stats = nullthis.mixer = nullthis.model = null//导入的模型},methods: {/*** @description 初始化*/init() {this.container = document.getElementById('container')this.windowHalfX = this.container.clientWidth / 2;this.windowHalfY = this.container.clientHeight / 2;this.setScene()this.setCamera()this.setRenderer()this.setEffect()this.setController()this.addHelper()this.setPMREMGenerator()this.setLight()this.setMesh()this.addStatus()},/*** @description 创建场景*/setScene() {// 创建场景对象Scenethis.scene = new THREE.Scene()// 设置场景背景// this.scene.background = new THREE.Color(0xbfe3dd);this.scene.background = textureCube;},/*** @description 创建相机*/setCamera() {// 第二参数就是 长度和宽度比 默认采用浏览器  返回以像素为单位的窗口的内部宽度和高度this.camera = new THREE.PerspectiveCamera(60, this.container.clientWidth / this.container.clientHeight, 1, 100000)// 设置相机位置this.camera.position.set(0, 0, 3200)// 设置摄像头宽高比例this.camera.aspect = this.container.clientWidth / this.container.clientHeight;// 设置摄像头投影矩阵this.camera.updateProjectionMatrix();// 设置相机视线方向this.camera.lookAt(new THREE.Vector3(0, 0, 0))// 0, 0, 0 this.scene.position// 将相机加入场景this.scene.add(this.camera)},/*** @description 创建渲染器*/setRenderer() {// 初始化渲染器this.renderer = new THREE.WebGLRenderer({antialias: true,// 设置抗锯齿logarithmicDepthBuffer: true,  // 是否使用对数深度缓存})// 设置渲染器宽高this.renderer.setSize(this.container.clientWidth, this.container.clientHeight);// 设置渲染器的像素比this.renderer.setPixelRatio(window.devicePixelRatio);// 是否需要对对象排序// this.renderer.sortObjects = false;// 将渲染器添加到页面this.container.appendChild(this.renderer.domElement);},/*** @description 创建双屏渲染器*/setEffect() {// 初始化渲染器this.effect = new StereoEffect(this.renderer)// 设置渲染器宽高this.effect.setSize(this.container.clientWidth, this.container.clientHeight);},/*** @description 添加创建控制器*/setController() {this.controller = new OrbitControls(this.camera, this.renderer.domElement);// 控制缩放范围// this.controller.minDistance = 1;// this.controller.maxDistance = 5;//是否开启右键拖拽// this.controller.enablePan = false;// 阻尼（惯性）this.controller.enableDamping = true; //启用阻尼（惯性）this.controller.dampingFactor = 0.04; //阻尼惯性有多大// this.controller.autoRotate = true; //自动围绕目标旋转// this.controller.minAzimuthAngle = -Math.PI / 3; //能够水平旋转的角度下限。如果设置，其有效值范围为[-2 * Math.PI，2 * Math.PI]，且旋转角度的上限和下限差值小于2 * Math.PI。默认值为无穷大。// this.controller.maxAzimuthAngle = Math.PI / 3;//水平旋转的角度上限,其有效值范围为[-2 * Math.PI，2 * Math.PI],默认值为无穷大// this.controller.minPolarAngle = 1; //能够垂直旋转的角度的下限，范围是0到Math.PI，其默认值为0。// this.controller.maxPolarAngle = Math.PI - 0.1; //能够垂直旋转的角度的上限，范围是0到Math.PI，其默认值为Math.PI。// 修改相机的lookAt是不会影响THREE.OrbitControls的target的// 由于设置了控制器，因此只能改变控制器的target以改变相机的lookAt方向// this.controller.target.set(0, 0.5, 0); //控制器的焦点},/*** @description 创建辅助坐标轴*/addHelper() {// 模拟相机视锥体的辅助对象let helper = new THREE.CameraHelper(this.camera);// this.scene.add(helper);//创建辅助坐标轴、轴辅助 （每一个轴的长度）let axisHelper = new THREE.AxesHelper(150);  // 红线是X轴，绿线是Y轴，蓝线是Z轴this.scene.add(axisHelper)// 坐标格辅助对象let gridHelper = new THREE.GridHelper(100, 30, 0x2C2C2C, 0x888888);this.scene.add(gridHelper);},/*** @description 给场景添加环境光效果*/setPMREMGenerator() {// 预过滤的Mipmapped辐射环境贴图const pmremGenerator = new THREE.PMREMGenerator(this.renderer);this.scene.environment = pmremGenerator.fromScene(new RoomEnvironment(this.renderer), 0.04).texture;},/*** @description 设置光源*/setLight() {// 环境光const ambientLight = new THREE.AmbientLight(0x404040, 4);// this.scene.add(ambientLight);// 平行光const directionalLight = new THREE.DirectionalLight(0xffffff, 1.0);// this.scene.add(directionalLight);// 点光源 - 照模型const test = new THREE.PointLight("#ffffff", 10, 2);// test.position.set(0, 0, 0);// this.scene.add(test);//点光源 - 辅助对象const testHelperMap = new THREE.PointLightHelper(test);// this.scene.add(testHelperMap);},/*** @description 创建性能监听器*/addStatus() {// 创建一个性能监听器this.stats = new Stats();// 将性能监听器添加到容器中this.container.appendChild(this.stats.dom);},/*** @description 添加创建模型*/setMesh() {// 创建模型// THREE.js 中环境贴图的映射模式有哪些?// THREE.CubeReflectionMapping：该映射模式将环境贴图作为一个立方体贴图，将六个面分别映射到对应的立方体面上，以模拟立方体环境映射和反射效果。// THREE.CubeRefractionMapping：该映射模式与 THREE.CubeReflectionMapping 类似，但是它模拟的是折射效果，即将环境贴图中的物体看作透明的，经过物体的折射后反射到表面上。// THREE.EquirectangularReflectionMapping：该映射模式将环境贴图作为一个全景图片，将图片映射到球体或半球体上，以模拟球形环境映射和反射效果。// THREE.EquirectangularRefractionMapping：该映射模式与 THREE.EquirectangularReflectionMapping 类似，但是模拟的是折射效果，即将环境贴图中的物体看作透明的，经过物体的折射后反射到表面上。// THREE.SphericalReflectionMapping：该映射模式将环境贴图映射到一个球形贴图上，以模拟球形环境映射和反射效果。与 THREE.EquirectangularReflectionMapping 相比，该映射模式需要使用一个球形贴图，因此对图像质量的要求较高，但可以实现更加真实的球形反射效果。textureCube.mapping = THREE.CubeRefractionMapping;//图像将如何应用到物体（对象）上const geometry = new THREE.SphereGeometry(100, 32, 16);const material = new THREE.MeshBasicMaterial({color: 0xffffff,envMap: textureCube,//环境贴图refractionRatio: 0.95,//空气的折射率（IOR）（约为1）除以材质的折射率。它与环境映射模式THREE.CubeRefractionMapping 一起使用})// 随机生成500个小球for (let i = 0; i < 500; i++) {const mesh = new THREE.Mesh(geometry, material)mesh.position.x = Math.random() * 10000 - 5000//[-5,5]mesh.position.y = Math.random() * 10000 - 5000mesh.position.z = Math.random() * 10000 - 5000mesh.scale.x = mesh.scale.y = mesh.scale.z = Math.random() * 3 + 1//[1,4]this.scene.add(mesh)this.spheres.push(mesh)}},/*** @description 监听屏幕的大小改变，修改渲染器的宽高，相机的比例*/// 窗口变化onWindowSize() {this.windowHalfX = this.container.clientWidth / 2;this.windowHalfY = this.container.clientHeight / 2;// 更新摄像头this.camera.aspect = this.container.clientWidth / this.container.clientHeight;// 更新摄像机的投影矩阵this.camera.updateProjectionMatrix();//更新渲染器// this.renderer.setSize(this.container.clientWidth, this.container.clientHeight);// 设置渲染器的像素比// this.renderer.setPixelRatio(window.devicePixelRatio)// 更新3D渲染器this.effect.setSize(this.container.clientWidth, this.container.clientHeight);},/*** @description 监听 mousemove 窗口事件*/onDocumentMouseMove(event) {this.mouseX = (event.clientX - this.windowHalfX) * 10;this.mouseY = (event.clientY - this.windowHalfY) * 10;},/*** @description 动画执行函数*/animate() {// camera聚焦const timer = 0.0001 * Date.now();this.camera.position.x += (this.mouseX - this.camera.position.x) * .05;this.camera.position.y += (- this.mouseY - this.camera.position.y) * .05;this.camera.lookAt(this.scene.position);// 小球位置随机for (let i = 0; i < this.spheres.length; i++) {const sphere = this.spheres[i];sphere.position.x = 5000 * Math.cos(timer + i);sphere.position.y = 5000 * Math.sin(timer + i * 1.1);}const delta = this.clock.getDelta();// mixer 动画更新if (this.mixer) {this.mixer.update(delta);}// 引擎自动更新渲染器requestAnimationFrame(this.animate);//update()函数内会执行camera.lookAt(x, y, z)this.controller.update(delta);// 更新性能监听器this.stats.update();// 重新渲染场景// this.renderer.render(this.scene, this.camera);this.effect.render(this.scene, this.camera);},},
};
</script>
<style>
#container {position: absolute;width: 100%;height: 100%;
}
</style>.lookAt(x, y, z)this.controller.update(delta);// 更新性能监听器this.stats.update();// 重新渲染场景// this.renderer.render(this.scene, this.camera);this.effect.render(this.scene, this.camera);},},
};
</script>
<style>
#container {position: absolute;width: 100%;height: 100%;
}
</style>