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threejs-master-learn
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examples
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webgl_loader_texture_lottie_20230913_...

<!DOCTYPE html>
<html lang="en">

<head>
	<title>three.js webgl - lottie loader</title>
	<meta charset="utf-8">
	<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
	<link type="text/css" rel="stylesheet" href="main.css">
</head>

<body>

	<div id="info">
		<span class="colorPicker"><input id="body-color" type="color" value="#ffffff"></input><br/>Body</span>
		<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> webgl - lottie<br/></br>
		<input id="scrubber" type="range" value="0" style="width: 300px">
	</div>

	<!-- Import maps polyfill -->
	<!-- Remove this when import maps will be widely supported -->
	<script async src="https://unpkg.com/es-module-shims@1.6.3/dist/es-module-shims.js"></script>

	<script type="importmap">
			{
				"imports": {
					"three": "../build/three.module.js",
					"three/addons/": "./jsm/"
				}
			}
		</script>

	<script type="module">

			import * as THREE from 'three';
			import { RoomEnvironment } from 'three/addons/environments/RoomEnvironment.js';
			import { RoundedBoxGeometry } from 'three/addons/geometries/RoundedBoxGeometry.js';
			import { LottieLoader } from 'three/addons/loaders/LottieLoader.js';

			let renderer, scene, camera;
			let mesh;

			init();
			animate();

			function init() {
				// 创建透视相机
				camera = new THREE.PerspectiveCamera( 50, window.innerWidth / window.innerHeight, 0.1, 10 );
				camera.position.z = 10;

				scene = new THREE.Scene();
					scene.background = new THREE.Color( '#ffffff' );

				const bodyColorInput = document.getElementById('body-color');
				bodyColorInput.addEventListener( 'input', function () {
					scene.background = new THREE.Color( this.value );
				} );

				// 创建动画片段
				const loader = new LottieLoader();
				console.log('loader: ', loader);
				// 动画质量
				loader.setQuality( 2 );
				loader.load( 'textures/lottie/24017-lottie-logo-animation.json', function ( texture ) {
					console.log('texture: ', texture);

					// 动画控制器
					setupControls( texture.animation );

					// texture = new THREE.TextureLoader().load( 'textures/uv_grid_directx.jpg' );
					// texture.colorSpace = THREE.SRGBColorSpace;
					//  创建圆角缓冲立方体
					// 长、宽、高、每面分几段、半径
					const geometry = new RoundedBoxGeometry( 4, 4, 4, 4, 0.4 );
					// 创建材质
					const material = new THREE.MeshStandardMaterial({
						roughness: 0.1,
						map: texture
					 } );
					//  创建网格
					mesh = new THREE.Mesh( geometry, material );
					scene.add( mesh );

				} );

				// 创建渲染器
				renderer = new THREE.WebGLRenderer();
				renderer.setPixelRatio( window.devicePixelRatio );
				renderer.setSize( window.innerWidth, window.innerHeight );
				document.body.appendChild( renderer.domElement );

				// 创建场景
				const environment = new RoomEnvironment( renderer );
				// 辐射环境贴图
				const pmremGenerator = new THREE.PMREMGenerator( renderer);

				// scene场景  sigma模糊半径  near近平面值  far远平面值
				scene.environment = pmremGenerator.fromScene( environment,0.1,1,100 ).texture;

				// 监听窗口变化
				window.addEventListener( 'resize', onWindowResize );

			}

			function setupControls( animation ) {

				// Lottie animation API
				// https://airbnb.io/lottie/#/web

				// There are a few undocumented properties:
				// console.log( animation );

				const scrubber = document.getElementById( 'scrubber' );
				scrubber.max = animation.totalFrames;

				// 鼠标按下事件
				scrubber.addEventListener( 'pointerdown', function () {

					animation.pause();

				} );
				// 鼠标松开事件
				scrubber.addEventListener( 'pointerup', function () {

					animation.play();

				} );

				// 监听手写笔进度
				scrubber.addEventListener( 'input', function () {

					animation.goToAndStop( parseFloat( scrubber.value ), true );

				} );

				// enterFrame 浏览器发布时的播放器事件 1/帧频
				/* 举例： Flash的舞台的帧频stage.FrameRate设置为25帧/秒，即每帧运行时间是1000ms/25帧，即1帧占40毫秒。Event.EnterFrame的出发间隔为40ms，如果Event.EnterFrame的执行函数花费时间为25ms，那么Event.EnterFrame将以间隔40ms的恒定频率循环执行函数。 */
				animation.addEventListener( 'enterFrame', function () {

					scrubber.value = animation.currentFrame;

				} );

			}

			function onWindowResize() {

				camera.aspect = window.innerWidth / window.innerHeight;
				camera.updateProjectionMatrix();

				renderer.setSize( window.innerWidth, window.innerHeight );

			}

			//
			function animate() {

				requestAnimationFrame( animate );

				if ( mesh ) {

					mesh.rotation.y += 0.001;

				}

				renderer.render( scene, camera );

			}

		</script>
</body>

</html>