three.js中模型动画的播放

首页在上一篇 Three.js加载外部glb,fbx,gltf,obj 模型文件 的文章基础上新加入 三个函数方法
1.开始执行动画方法： onStartModelAnimaion
2.设置模型动画方法：onSetModelAnimaion
3.模型动画帧渲染方法：animationFrameFun

	// 开始执行动画
	onStartModelAnimaion(config) {
		this.onSetModelAnimaion(config)
		cancelAnimationFrame(this.animationFram)
		this.animationFrameFun()
	}
	// 设置模型动画
	onSetModelAnimaion({ animations, animationName, loop, timeScale, weight }) {
		this.animationMixer = new THREE.AnimationMixer(this.model)
		const clip = THREE.AnimationClip.findByName(animations, animationName)
		if (clip) {
			this.animateClipAction = this.animationMixer.clipAction(clip)
			this.animateClipAction.setEffectiveTimeScale(timeScale)
			this.animateClipAction.setEffectiveWeight(weight)
			// 动画播放的方式
			this.animateClipAction.setLoop(this.loopMap[loop])
			this.animateClipAction.play()
		}
	}
	// 动画帧
	animationFrameFun() {
		this.animationFram = requestAnimationFrame(() => this.animationFrameFun())
		if (this.animationMixer) {
			this.animationMixer.update(this.animationColock.getDelta())
		}
	}

完整的代码如下

import * as THREE from 'three' //导入整个 three.js核心库
import { GLTFLoader } from 'three/examples/jsm/loaders/GLTFLoader' 
import { DRACOLoader } from 'three/examples/jsm/loaders/DRACOLoader'
import { OBJLoader } from 'three/examples/jsm/loaders/OBJLoader'
import { FBXLoader } from 'three/examples/jsm/loaders/FBXLoader'
// 定义一个 class类
class renderModel {
    	constructor(selector) {
    	    this.container = document.querySelector(selector)
		    // 相机
	    	this.camera
		    // 场景
		    this.scene
		    //渲染器
		    this.renderer
		    // 控制器
		    this.controls
		    // 模型
		    this.model    
		     //文件加载器类型
		    this.fileLoaderMap = {
			 'glb': new GLTFLoader(),
			 'fbx': new FBXLoader(),
			 'gltf': new GLTFLoader(),
			 'obj': new OBJLoader(),
	    	}
	    		//模型动画列表
		    this.modelAnimation
		    //模型动画对象
		    this.animationMixer
		    this.animationColock = new THREE.Clock()
		     //动画帧
		    this.animationFrame
		     // 动画构造器
		    this.animateClipAction = null
		     // 动画循环方式枚举
		    this.loopMap = {
		    	LoopOnce: THREE.LoopOnce, // 只播放一次
			    LoopRepeat: THREE.LoopRepeat,//循环播放
			    LoopPingPong: THREE.LoopPingPong // 来回播放
		  }
        }
         // 初始化加载模型方法
        init(){
         	return new Promise(async (reslove, reject) => {
			//初始化场景
			this.initScene()
			//初始化相机
			this.initCamera()
			//初始化渲染器
			this.initRender()
			// 添加物体模型 TODO：初始化时需要默认一个  filePath:'threeFile/glb/glb-3.glb' 放在 vue项目中的public/threeFile文件下
			const load = await this.setModel({ filePath: 'threeFile/glb/glb-3.glb', fileType: 'glb',scale:0.5})
			//监听场景大小改变，跳转渲染尺寸
			window.addEventListener("resize", this.onWindowResize.bind(this))
			//场景渲染
			this.sceneAnimation()
			reslove(load)
	   	  })
        }
        //创建场景
	initScene() {
		this.scene = new THREE.Scene()
		//创建一个球体 用于映射全景图
		const sphereBufferGeometry = new THREE.SphereGeometry(40, 32, 16);
		sphereBufferGeometry.scale(-1, -1, -1);
		const material = new THREE.MeshBasicMaterial({
			map: new THREE.TextureLoader().load(require('@/assets/image/view-1.png'))
		});
		//设置场景全景图
		this.viewMesh = new THREE.Mesh(sphereBufferGeometry, material);
	     //添加场景
		this.scene.add(this.viewMesh);
	}
		// 创建相机
	initCamera() {
		const { clientHeight, clientWidth } = this.container
		this.camera = new THREE.PerspectiveCamera(45, clientWidth / clientHeight, 0.25, 100)
	}
	 // 创建渲染器
	initRender() {
		this.renderer = new THREE.WebGLRenderer({ antialias: true, alpha: true }) //设置抗锯齿
		//设置屏幕像素比
		this.renderer.setPixelRatio(window.devicePixelRatio)
		//渲染的尺寸大小
		const { clientHeight, clientWidth } = this.container
		this.renderer.setSize(clientWidth, clientHeight)
		//色调映射
		this.renderer.toneMapping = THREE.ACESFilmicToneMapping
		//曝光
		this.renderer.toneMappingExposure = 3
		this.renderer.shadowMap.enabled = true
		this.renderer.shadowMap.type = THREE.PCFSoftShadowMap
		this.container.appendChild(this.renderer.domElement)
	}
	// 使用动画器不断更新场景
	 sceneAnimation() {
		this.renderer.setAnimationLoop(this.render.bind(this))
	 }
     //渲染场景
	render(){
	  this.renderer.render(this.scene, this.camera)
	}
	//加载模型
	setModel({ filePath, fileType, scale,  position }) {
		return new Promise((resolve, reject) => {
			const loader = this.fileLoaderMap[fileType]
			loader.load(filePath, (result) => {
			  //加载不同类型的文件
				switch (fileType) {
					case 'glb':
						this.model = result.scene
						this.skeletonHelper = new THREE.SkeletonHelper(result.scene)
						this.modelAnimation = result.animations || []
						// 如果当前模型有动画则默认播放第一条动画
						if (this.modelAnimation.length) {
							const animationName = this.modelAnimation[0].name
							const config = {
								animations: this.modelAnimation,
								timeScale: 1, // 播放速度
								weight: 1, // 动作幅度
								loop: "LoopRepeat",
								animationName // 播放的动画名
							}
							this.onStartModelAnimaion(config)
						}	
						break;
					case 'fbx':
						this.model = result
						break;
					case 'gltf':
						this.model = result.scene
						break;
					case 'obj':
						this.model = result
						break;
					default:
						break;
				}
				// 设置模型大小
				if (scale) {
					this.model.scale.set(scale, scale, scale);
				}
				// 设置模型位置 
				if (position) {
					const { x, y, z } = position
					this.model.position.set(x, y, z)
				}
				// 设置相机位置
				this.camera.position.set(0, 2, 6)
				// 设置相机坐标系
				this.camera.lookAt(0, 0, 0)
	             // 将模型添加到场景中去   
				this.scene.add(this.model)
				resolve(true)
			}, () => {

			}, (err) => {
				console.log(err)
				reject()
			})
		})
	}
		// 开始执行动画
	onStartModelAnimaion(config) {
		this.onSetModelAnimaion(config)
		cancelAnimationFrame(this.animationFram)
		this.animationFrameFun()
	}
	// 设置模型动画
	onSetModelAnimaion({ animations, animationName, loop, timeScale, weight }) {
		this.animationMixer = new THREE.AnimationMixer(this.model)
		const clip = THREE.AnimationClip.findByName(animations, animationName)
		if (clip) {
			this.animateClipAction = this.animationMixer.clipAction(clip)
			this.animateClipAction.setEffectiveTimeScale(timeScale)
			this.animateClipAction.setEffectiveWeight(weight)
			this.animateClipAction.setLoop(this.loopMap[loop])
			this.animateClipAction.play()
		}
	}
	// 动画帧
	animationFrameFun() {
		this.animationFram = requestAnimationFrame(() => this.animationFrameFun())
		if (this.animationMixer) {
			this.animationMixer.update(this.animationColock.getDelta())
		}
	}
}

完整的代码可参考:https://gitee.com/ZHANG_6666/Three.js3D
效果图: