Three.js基础入门介绍——【毕业季】Three.js动态相册

前言
岁月匆匆，又是一年毕业季，这次做个动态相册展示图片，放些有意思的内容，一起回忆下校园生活吧。

预期效果

相册展示和点选切换，利用相机旋转和移动来实现一个点击切图平滑过渡的效果。

实现流程

基本流程

1、搭建场景
2、放置图片
3、鼠标事件
4、相机运动

工程文件
工程文件结构如下图：
static：存放静态资源文件
three.js-master：为官网下载的代码包，包含所有需要用到的资源包，链接：https://github.com/mrdoob/three.js/archive/master.zip
在这里插入图片描述
index.html：页面代码

<!DOCTYPE html>
<html><head><meta charset="utf-8"><title>My first three.js app</title><style>body {margin: 0;}</style>
</head><body><script type="importmap">{"imports": {"three": "./three.js-master/build/three.module.js"}}</script><script type="module">// 下文JS代码位置// ...</script>
</body></html>

搭建场景
需要导入的内容和提前声明的变量，包含后续不同function中可能用到的场景、相机、渲染器、控制器等要素。

import * as THREE from "three";
import { OrbitControls } from "./three.js-master/examples/jsm/controls/OrbitControls.js";
import { GLTFLoader } from "./three.js-master/examples/jsm/loaders/GLTFLoader.js";
import { TWEEN } from "./three.js-master/examples/jsm/libs/tween.module.min.js";let scene, camera, renderer, controls; //场景、相机、渲染器、控制器
let pointLight, ambientLight; //光源
let curve = null, rate = 0; // 照片点位
let imgArr = []; //照片url
let imgCut = 50; //照片剪影大小
let rotateImg = true; // 是否继续轮转照片,其实是相机在转
const imgGroup = new THREE.Group(); //照片对象组
const textureLoader = new THREE.TextureLoader(); // 纹理加载器
const pointer = new THREE.Vector2(); //点击坐标
const raycaster = new THREE.Raycaster(); //射线
const threeEl = document.getElementById('container'); //元素获取

场景和部分数据初始化，其中图片这里直接是使用的网络资源图，可以使用本地文件或者自己搭建的服务环境文件。

function init() {imgArr = ["https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fimg95.699pic.com%2Fphoto%2F40142%2F4204.gif_wh860.gif&refer=http%3A%2F%2Fimg95.699pic.com&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=auto?sec=1659077726&t=ea5e3abb8b838546ae9377321744f875","https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fimg.zcool.cn%2Fcommunity%2F019b795b2cc0dba80121bbec95a340.jpg%402o.jpg&refer=http%3A%2F%2Fimg.zcool.cn&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=auto?sec=1659076627&t=be25ec64df151d68c5dd5296a1d68fcf","https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fp4.itc.cn%2Fimages01%2F20200707%2Fcc1bec607b1949549f374f3e0e68bc2d.jpeg&refer=http%3A%2F%2Fp4.itc.cn&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=auto?sec=1659072591&t=34a56c58c383f15a5118d81859cad417","https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fimg.zcool.cn%2Fcommunity%2F019b795b2cc0dba80121bbec95a340.jpg%402o.jpg&refer=http%3A%2F%2Fimg.zcool.cn&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=auto?sec=1659076255&t=aae752e553bbdeda27a4fa14b242e4e8","https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fp.qpic.cn%2Fdnfbbspic%2F0%2Fdnfbbs_dnfbbs_dnf_gamebbs_qq_com_forum_202007_05_084137qjj5sjd9pqm9mprr.jpg%2F0&refer=http%3A%2F%2Fp.qpic.cn&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=auto?sec=1659076255&t=bd12aa3f0d060cc19880158e9ef7b16f","https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fwww.keaidian.com%2Fuploads%2Fallimg%2F190713%2F13174657_15.jpg&refer=http%3A%2F%2Fwww.keaidian.com&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=auto?sec=1659076255&t=47296d32109bbffce6844b557a109d24","https://img2.baidu.com/it/u=3487630334,1818100496&fm=253&fmt=auto&app=138&f=JPEG?w=889&h=500","https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fup.enterdesk.com%2Fedpic_source%2F29%2F09%2F31%2F290931cc8b21f13ff0ca273ff8e4865e.jpg&refer=http%3A%2F%2Fup.enterdesk.com&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=auto?sec=1659076255&t=5c77914a690c1b53de57c7bf5692487a",]changeImg(threeEl, imgArr[0]);scene = new THREE.Scene();camera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 0.1, 1000);renderer = new THREE.WebGLRenderer();// 添加相机并设置在原点camera.position.set(0, 0, 0);camera.lookAt(new THREE.Vector3(1, 0, 0));// 添加一个点光源pointLight = new THREE.PointLight(0xffffff);scene.add(pointLight);// 添加一个环境光ambientLight = new THREE.AmbientLight(0xffffff);scene.add(ambientLight);// 增加坐标系红色代表 X 轴. 绿色代表 Y 轴. 蓝色代表 Z 轴.// 添加坐标系到场景中// const axes = new THREE.AxesHelper(20);// scene.add(axes);// 创建渲染器对象renderer = new THREE.WebGLRenderer({ antialias: true, alpha: true });renderer.setSize(window.innerWidth, window.innerHeight);//设置渲染区域尺寸threeEl.appendChild(renderer.domElement); //body元素中插入canvas对象render// 监听鼠标pointerListing();// 初始化控制器controls = new OrbitControls(camera, renderer.domElement);//创建控件对象controls.enabled = false;
}

放置图片
用到了基础网格材质(MeshBasicMaterial)和贴图，用贴图加载器（TextureLoader）将图片贴到放置的平面缓冲几何体（PlaneGeometry）上，再在外层增加一个有一定透明度的立方缓冲几何体（BoxGeometry），让它看上去就像是一个相框。

基础网格材质(MeshBasicMaterial)
一个以简单着色（平面或线框）方式来绘制几何体的材质，这种材质不受光照的影响。

构造函数(Constructor)
MeshBasicMaterial( parameters : Object )
parameters - (可选)用于定义材质外观的对象，具有一个或多个属性。材质的任何属性都可以从此处传入(包括从Material继承的任何属性)。
属性color例外，其可以作为十六进制字符串传递，默认情况下为 0xffffff（白色），内部调用Color.set(color)。

TextureLoader
加载texture的一个类。内部使用ImageLoader来加载文件。

构造函数
TextureLoader( manager : LoadingManager )
manager — 加载器使用的loadingManager，默认值为THREE.DefaultLoadingManager.

// 图片贴到对应位置
function placeImg() {imgGroup.name = 'imgGroup';// 红色代表 X 轴. 绿色代表 Y 轴. 蓝色代表 Z 轴.// Create a closed wavey loopcurve = new THREE.CatmullRomCurve3([new THREE.Vector3(75, 0, 0),new THREE.Vector3(0, 0, 75),new THREE.Vector3(-75, 0, 0),new THREE.Vector3(0, 0, -75)]);// centripetal、chordal和catmullromcurve.curveType = "catmullrom";curve.closed = true;//设置是否闭环curve.tension = 1; //设置线的张力，0为无弧度折线// // 为曲线添加材质在场景中显示出来，不添加到场景显示也不会影响运动轨迹，相当于一个Helper// const points = curve.getPoints(50);// const geometry = new THREE.BufferGeometry().setFromPoints(points);// const material = new THREE.LineBasicMaterial({ color: 0x000000 });// // Create the final object to add to the scene// const curveObject = new THREE.Line(geometry, material);// scene.add(curveObject);const imgNum = imgArr.length;rate = imgNum <= 0 ? 0 : (1 / imgNum);imgArr.forEach((item, index) => {const imgPosition = curve.getPointAt(rate * index);// 材质对象Materialconst material = new THREE.MeshBasicMaterial({side: THREE.DoubleSide,opacity: 0.8,transparent: true,name: "material" + index,map: textureLoader.load(item)});const mesh = new THREE.Mesh(new THREE.PlaneGeometry(imgCut, imgCut), material);mesh.position.set(imgPosition.x, imgPosition.y, imgPosition.z);mesh.rotation.y = -Math.PI / 2;mesh.lookAt(scene.position) //设置朝向mesh.name = item;// imgGroup.add(mesh);scene.add(mesh);// 加一个框const boxMaterial = new THREE.MeshBasicMaterial({opacity: 0.1,transparent: true,color: 0x0081cc});const boxMesh = new THREE.Mesh(new THREE.BoxGeometry(imgCut * 1.1, imgCut * 1.1, imgCut * 0.1), boxMaterial);boxMesh.position.set(imgPosition.x, imgPosition.y, imgPosition.z);boxMesh.rotation.y = -Math.PI / 2;boxMesh.lookAt(scene.position) //设置朝向boxMesh.name = item;imgGroup.add(boxMesh);})scene.add(imgGroup);}

鼠标事件
当鼠标放到相框上，贴有照片的平面几何体外层立方几何体的透明度改变，达到选中效果，选中贴图剪影时页面背景改变。

 // 背景替换
function changeImg(element, url) {element.style.backgroundImage = `url(${url})`;// element.style.backgroundSize = '100%'; 
}
// 添加鼠标监听
function pointerListing() {threeEl.addEventListener("pointerdown", onPointerDown);threeEl.addEventListener("pointermove", onPointerMove);
}
function onPointerMove(event) {// 将鼠标位置归一化为设备坐标。x 和 y 方向的取值范围是 (-1 to +1)pointer.set((event.clientX / window.innerWidth) * 2 - 1,-(event.clientY / window.innerHeight) * 2 + 1);// console.log(scene);raycaster.setFromCamera(pointer, camera);const intersects = raycaster.intersectObjects([...imgGroup.children],false);// 有照片就换背景if (intersects.length > 0) {const intersect = intersects[0];intersect.object.material.opacity = 0.5;}else{imgGroup.children.forEach(item => {item.material.opacity = 0.1;});}
}
function onPointerDown(event) {// 将鼠标位置归一化为设备坐标。x 和 y 方向的取值范围是 (-1 to +1)pointer.set((event.clientX / window.innerWidth) * 2 - 1,-(event.clientY / window.innerHeight) * 2 + 1);// console.log(scene);raycaster.setFromCamera(pointer, camera);const intersects = raycaster.intersectObjects([...imgGroup.children],false);// 有照片就换背景if (intersects.length > 0) {const intersect = intersects[0];// console.log(intersect.object);// 背景替换changeImg(threeEl, intersect.object.name);// 相机移动rotateImg = false;// 照片旋转停下来const changePosition = new THREE.Vector3(intersect.object.position.x*1.5,intersect.object.position.y*1.5,intersect.object.position.z*1.5);animateCamera(camera.position, changePosition);} else {// 相机回原点const o = new THREE.Vector3(0,0,0);animateCamera(camera.position, o);rotateImg = true;}
};

相机运动
相机本身在旋转，相对的图片看起来就像是在滚动播放，当点击某个图片时，相机移动到对应对象更外层，点击空白再回到原点，达到平滑切换的效果。

function onPointerDown(event) {// 将鼠标位置归一化为设备坐标。x 和 y 方向的取值范围是 (-1 to +1)pointer.set((event.clientX / window.innerWidth) * 2 - 1,-(event.clientY / window.innerHeight) * 2 + 1);// console.log(scene);raycaster.setFromCamera(pointer, camera);const intersects = raycaster.intersectObjects([...imgGroup.children],false);// 有照片就换背景if (intersects.length > 0) {const intersect = intersects[0];// console.log(intersect.object);// 背景替换changeImg(threeEl, intersect.object.name);// 相机移动rotateImg = false;// 照片旋转停下来const changePosition = new THREE.Vector3(intersect.object.position.x*1.5,intersect.object.position.y*1.5,intersect.object.position.z*1.5);animateCamera(camera.position, changePosition);} else {// 相机回原点const o = new THREE.Vector3(0,0,0);animateCamera(camera.position, o);rotateImg = true;}
};
// current1 相机当前的位置
// target1 相机的目标位置
// current2 当前的controls的target
// target2 新的controls的target
function animateCamera(current1, target1,callBack) {var tween = new TWEEN.Tween({x1: current1.x, // 相机当前位置xy1: current1.y, // 相机当前位置yz1: current1.z, // 相机当前位置z// x2: current2.x, // 控制当前的中心点x// y2: current2.y, // 控制当前的中心点y// z2: current2.z // 控制当前的中心点z});tween.to({x1: target1.x, // 新的相机位置xy1: target1.y, // 新的相机位置yz1: target1.z, // 新的相机位置z// x2: target2.x, // 新的控制中心点位置x// y2: target2.y, // 新的控制中心点位置x// z2: target2.z // 新的控制中心点位置x}, 1000);tween.onUpdate(function (object) {camera.position.x = object.x1;camera.position.y = object.y1;camera.position.z = object.z1;// controls.target.x = object.x2;// controls.target.y = object.y2;// controls.target.z = object.z2;// controls.update();});tween.onComplete(function () {callBack && callBack()});tween.easing(TWEEN.Easing.Cubic.InOut);tween.start();
}

完整代码

<!DOCTYPE html>
<html><head><meta charset="utf-8"><title>My first three.js app</title><style>body {margin: 0px;}#container {/* background: #000000 url("https://seopic.699pic.com/photo/50041/6756.jpg_wh1200.jpg") no-repeat; */background: #000000;background-size: 100vw 100vh;overflow: hidden;width: 100vw;height: 100vh;}</style>
</head><body><div id="container"></div><script type="importmap">{"imports": {"three": "./three.js-master/build/three.module.js"}}</script><script type="module">import * as THREE from "three";import { OrbitControls } from "./three.js-master/examples/jsm/controls/OrbitControls.js";import { GLTFLoader } from "./three.js-master/examples/jsm/loaders/GLTFLoader.js";import { TWEEN } from "./three.js-master/examples/jsm/libs/tween.module.min.js";let scene, camera, renderer, controls; //场景、相机、渲染器、控制器let pointLight, ambientLight; //光源let curve = null, rate = 0; // 照片点位let imgArr = []; //照片urllet imgCut = 50; //照片剪影大小let rotateImg = true; // 是否继续轮转照片,其实是相机在转const imgGroup = new THREE.Group(); //照片对象组const textureLoader = new THREE.TextureLoader(); // 纹理加载器const pointer = new THREE.Vector2(); //点击坐标const raycaster = new THREE.Raycaster(); //射线const threeEl = document.getElementById('container'); //元素获取function init() {imgArr = ["https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fimg95.699pic.com%2Fphoto%2F40142%2F4204.gif_wh860.gif&refer=http%3A%2F%2Fimg95.699pic.com&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=auto?sec=1659077726&t=ea5e3abb8b838546ae9377321744f875","https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fimg.zcool.cn%2Fcommunity%2F019b795b2cc0dba80121bbec95a340.jpg%402o.jpg&refer=http%3A%2F%2Fimg.zcool.cn&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=auto?sec=1659076627&t=be25ec64df151d68c5dd5296a1d68fcf","https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fp4.itc.cn%2Fimages01%2F20200707%2Fcc1bec607b1949549f374f3e0e68bc2d.jpeg&refer=http%3A%2F%2Fp4.itc.cn&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=auto?sec=1659072591&t=34a56c58c383f15a5118d81859cad417","https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fimg.zcool.cn%2Fcommunity%2F019b795b2cc0dba80121bbec95a340.jpg%402o.jpg&refer=http%3A%2F%2Fimg.zcool.cn&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=auto?sec=1659076255&t=aae752e553bbdeda27a4fa14b242e4e8","https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fp.qpic.cn%2Fdnfbbspic%2F0%2Fdnfbbs_dnfbbs_dnf_gamebbs_qq_com_forum_202007_05_084137qjj5sjd9pqm9mprr.jpg%2F0&refer=http%3A%2F%2Fp.qpic.cn&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=auto?sec=1659076255&t=bd12aa3f0d060cc19880158e9ef7b16f","https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fwww.keaidian.com%2Fuploads%2Fallimg%2F190713%2F13174657_15.jpg&refer=http%3A%2F%2Fwww.keaidian.com&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=auto?sec=1659076255&t=47296d32109bbffce6844b557a109d24","https://img2.baidu.com/it/u=3487630334,1818100496&fm=253&fmt=auto&app=138&f=JPEG?w=889&h=500","https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fup.enterdesk.com%2Fedpic_source%2F29%2F09%2F31%2F290931cc8b21f13ff0ca273ff8e4865e.jpg&refer=http%3A%2F%2Fup.enterdesk.com&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=auto?sec=1659076255&t=5c77914a690c1b53de57c7bf5692487a",]changeImg(threeEl, imgArr[0]);scene = new THREE.Scene();camera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 0.1, 1000);renderer = new THREE.WebGLRenderer();// 添加相机并设置在原点camera.position.set(0, 0, 0);camera.lookAt(new THREE.Vector3(1, 0, 0));// 添加一个点光源pointLight = new THREE.PointLight(0xffffff);scene.add(pointLight);// 添加一个环境光ambientLight = new THREE.AmbientLight(0xffffff);scene.add(ambientLight);// 增加坐标系红色代表 X 轴. 绿色代表 Y 轴. 蓝色代表 Z 轴.// 添加坐标系到场景中// const axes = new THREE.AxesHelper(20);// scene.add(axes);// 创建渲染器对象renderer = new THREE.WebGLRenderer({ antialias: true, alpha: true });renderer.setSize(window.innerWidth, window.innerHeight);//设置渲染区域尺寸threeEl.appendChild(renderer.domElement); //body元素中插入canvas对象render// 监听鼠标pointerListing();// 初始化控制器controls = new OrbitControls(camera, renderer.domElement);//创建控件对象controls.enabled = false;}// 背景替换function changeImg(element, url) {element.style.backgroundImage = `url(${url})`;// element.style.backgroundSize = '100%'; }// 添加鼠标监听function pointerListing() {threeEl.addEventListener("pointerdown", onPointerDown);threeEl.addEventListener("pointermove", onPointerMove);}function onPointerMove(event) {// 将鼠标位置归一化为设备坐标。x 和 y 方向的取值范围是 (-1 to +1)pointer.set((event.clientX / window.innerWidth) * 2 - 1,-(event.clientY / window.innerHeight) * 2 + 1);// console.log(scene);raycaster.setFromCamera(pointer, camera);const intersects = raycaster.intersectObjects([...imgGroup.children],false);// 有照片就换背景if (intersects.length > 0) {const intersect = intersects[0];intersect.object.material.opacity = 0.5;}else{imgGroup.children.forEach(item => {item.material.opacity = 0.1;});}}function onPointerDown(event) {// 将鼠标位置归一化为设备坐标。x 和 y 方向的取值范围是 (-1 to +1)pointer.set((event.clientX / window.innerWidth) * 2 - 1,-(event.clientY / window.innerHeight) * 2 + 1);// console.log(scene);raycaster.setFromCamera(pointer, camera);const intersects = raycaster.intersectObjects([...imgGroup.children],false);// 有照片就换背景if (intersects.length > 0) {const intersect = intersects[0];// console.log(intersect.object);// 背景替换changeImg(threeEl, intersect.object.name);// 相机移动rotateImg = false;// 照片旋转停下来const changePosition = new THREE.Vector3(intersect.object.position.x*1.5,intersect.object.position.y*1.5,intersect.object.position.z*1.5);animateCamera(camera.position, changePosition);} else {// 相机回原点const o = new THREE.Vector3(0,0,0);animateCamera(camera.position, o);rotateImg = true;}};// current1 相机当前的位置// target1 相机的目标位置// current2 当前的controls的target// target2 新的controls的targetfunction animateCamera(current1, target1,callBack) {var tween = new TWEEN.Tween({x1: current1.x, // 相机当前位置xy1: current1.y, // 相机当前位置yz1: current1.z, // 相机当前位置z// x2: current2.x, // 控制当前的中心点x// y2: current2.y, // 控制当前的中心点y// z2: current2.z // 控制当前的中心点z});tween.to({x1: target1.x, // 新的相机位置xy1: target1.y, // 新的相机位置yz1: target1.z, // 新的相机位置z// x2: target2.x, // 新的控制中心点位置x// y2: target2.y, // 新的控制中心点位置x// z2: target2.z // 新的控制中心点位置x}, 1000);tween.onUpdate(function (object) {camera.position.x = object.x1;camera.position.y = object.y1;camera.position.z = object.z1;// controls.target.x = object.x2;// controls.target.y = object.y2;// controls.target.z = object.z2;// controls.update();});tween.onComplete(function () {callBack && callBack()});tween.easing(TWEEN.Easing.Cubic.InOut);tween.start();}// 图片贴到对应位置function placeImg() {imgGroup.name = 'imgGroup';// 红色代表 X 轴. 绿色代表 Y 轴. 蓝色代表 Z 轴.// Create a closed wavey loopcurve = new THREE.CatmullRomCurve3([new THREE.Vector3(75, 0, 0),new THREE.Vector3(0, 0, 75),new THREE.Vector3(-75, 0, 0),new THREE.Vector3(0, 0, -75)]);// centripetal、chordal和catmullromcurve.curveType = "catmullrom";curve.closed = true;//设置是否闭环curve.tension = 1; //设置线的张力，0为无弧度折线// // 为曲线添加材质在场景中显示出来，不添加到场景显示也不会影响运动轨迹，相当于一个Helper// const points = curve.getPoints(50);// const geometry = new THREE.BufferGeometry().setFromPoints(points);// const material = new THREE.LineBasicMaterial({ color: 0x000000 });// // Create the final object to add to the scene// const curveObject = new THREE.Line(geometry, material);// scene.add(curveObject);const imgNum = imgArr.length;rate = imgNum <= 0 ? 0 : (1 / imgNum);imgArr.forEach((item, index) => {const imgPosition = curve.getPointAt(rate * index);// 材质对象Materialconst material = new THREE.MeshBasicMaterial({side: THREE.DoubleSide,opacity: 0.8,transparent: true,name: "material" + index,map: textureLoader.load(item)});const mesh = new THREE.Mesh(new THREE.PlaneGeometry(imgCut, imgCut), material);mesh.position.set(imgPosition.x, imgPosition.y, imgPosition.z);mesh.rotation.y = -Math.PI / 2;mesh.lookAt(scene.position) //设置朝向mesh.name = item;// imgGroup.add(mesh);scene.add(mesh);// 加一个框const boxMaterial = new THREE.MeshBasicMaterial({opacity: 0.1,transparent: true,color: 0x0081cc});const boxMesh = new THREE.Mesh(new THREE.BoxGeometry(imgCut * 1.1, imgCut * 1.1, imgCut * 0.1), boxMaterial);boxMesh.position.set(imgPosition.x, imgPosition.y, imgPosition.z);boxMesh.rotation.y = -Math.PI / 2;boxMesh.lookAt(scene.position) //设置朝向boxMesh.name = item;imgGroup.add(boxMesh);})scene.add(imgGroup);}//执行渲染操作   指定场景、相机作为参数function render() {renderer.render(scene, camera);//执行渲染操作if (rotateImg) {camera.rotateY(0.001);//每次绕y轴旋转0.001弧度}TWEEN.update();// newmesh.rotateY(0.01);//每次绕y轴旋转0.01弧度requestAnimationFrame(render);//请求再次执行渲染函数render}function initWindow() {let onResize = function () {camera.aspect = window.innerWidth / window.innerHeight;camera.updateProjectionMatrix();renderer.setSize(window.innerWidth, window.innerHeight);};window.addEventListener("resize", onResize, false);};init();placeImg();initWindow();render();</script></body></html>