three.js 实现模型模型 ，拆解，爆炸，还原的动画效果

在线链接：https://threehub.cn/#/codeMirror?navigation=ThreeJS&classify=basic&id=modelUnpack

国内站点预览：http://threehub.cn

github地址: https://github.com/z2586300277/three-cesium-examples

import * as THREE from 'three'
import { OrbitControls } from 'three/examples/jsm/controls/OrbitControls.js'
import { GLTFLoader } from 'three/examples/jsm/loaders/GLTFLoader.js'
import { DRACOLoader } from 'three/examples/jsm/loaders/DRACOLoader.js'
import * as dat from 'dat.gui'
import gsap from 'gsap'const box = document.getElementById('box')const scene = new THREE.Scene()const camera = new THREE.PerspectiveCamera(75, box.clientWidth / box.clientHeight, 0.1, 1000)camera.position.set(5, 5, 5)const renderer = new THREE.WebGLRenderer({ antialias: true, alpha: true, logarithmicDepthBuffer: true })renderer.setSize(box.clientWidth, box.clientHeight)box.appendChild(renderer.domElement)new OrbitControls(camera, renderer.domElement)window.onresize = () => {renderer.setSize(box.clientWidth, box.clientHeight)camera.aspect = box.clientWidth / box.clientHeightcamera.updateProjectionMatrix()}animate()function animate() {requestAnimationFrame(animate)renderer.render(scene, camera)}scene.add(new THREE.AmbientLight(0xffffff, 1))const pointLight = new THREE.PointLight(0xffffff, 1.5, 0, 2)pointLight.position.set(5, 5, 5)scene.add(pointLight)const directionalLight = new THREE.DirectionalLight(0xffffff, 2)directionalLight.position.set(-5, 5, -5)scene.add(directionalLight)scene.add(new THREE.AxesHelper(1000))let group// 加载模型 gltf/ glb  draco解码器
const loader = new GLTFLoader()loader.setDRACOLoader(new DRACOLoader().setDecoderPath(`https://file.threehub.cn/` + 'js/three/draco/'))loader.load(`https://threehub.cn/` + '/files/model/car.glb',gltf => {group = gltf.sceneconst box = new THREE.Box3().setFromObject(group);const center = new THREE.Vector3();box.getCenter(center);group.center = centergroup.traverse((child) => {if (child.isMesh) {child.localToWorld(child.position)   //转为世界坐标child.startPoisition = child.position.clone()}})scene.add(group)})// 拆解
const mergeHandle = (model) => {const distance = () => Math.random() > 0.5 ? 1.5 : -1.5model.traverse((child) => {if (child.startPoisition) {const v1 = distance()const v2 = distance()const v3 = distance()gsap.to(child.position, { x: child.startPoisition.x + v1, y: child.startPoisition.y + v2, z: child.startPoisition.z + v3, duration: 1, ease: 'power2.inOut' })}});
};const gui = new dat.GUI()gui.add({'拆解动画': () => {mergeHandle(group)}}, '拆解动画')gui.add({'还原动画': () => {group.traverse((child) => {if (child.startPoisition) {gsap.to(child.position, { x: child.startPoisition.x, y: child.startPoisition.y, z: child.startPoisition.z, duration: 1, ease: 'power2.inOut' })}});}}, '还原动画')/*** 名称: 模型拆解动画* 作者: 优雅永不过时 https://github.com/z2586300277
*/