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<script src="js/three.js"></script><script src="js/Projector.js"></script><script src="js/CanvasRenderer.js"></script>定义所需变量
var SEPARATION = 150, // 间隔 AMOUNTX = 100, // 控制X轴数量 AMOUNTY = 50; // 控制Y轴数量var camera, scene, renderer;var particles, particle, count = 0;定义方法init，用来初始化相机、场景、粒子和渲染器；
function init() { // 相机 camera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 1, 10000); camera.position.z = 1000; camera.position.y = 500; scene = new THREE.Scene(); // 场景 // 粒子 particles = new Array(); var PI2 = Math.PI * 2; var material = new THREE.SpriteCanvasMaterial({ color: 0xffffff, program: function(context) { context.beginPath(); context.arc(0, 0, 0.5, 0, PI2, true); context.fill(); } }); var i = 0; for (var ix = 0; ix < AMOUNTX; ix++) { for (var iy = 0; iy < AMOUNTY; iy++) { particle = particles[i++] = new THREE.Sprite(material); particle.position.x = ix * SEPARATION - ((AMOUNTX * SEPARATION) / 2); particle.position.z = iy * SEPARATION - ((AMOUNTY * SEPARATION) / 2); scene.add(particle); } } // 渲染器 renderer = new THREE.CanvasRenderer(); renderer.setPixelRatio(window.devicePixelRatio); renderer.setSize(window.innerWidth, window.innerHeight); document.getElementById('waves-box').appendChild(renderer.domElement); }定义方法animate，使用requestAnimationFrame进行动画渲染； function animate() { requestAnimationFrame(animate); render(); }定义方法render，用来把所有粒子渲染到场景上； function render() { var i = 0; for (var ix = 0; ix < AMOUNTX; ix++) { for (var iy = 0; iy < AMOUNTY; iy++) { particle = particles[i++]; particle.position.y = (Math.sin((ix + count) * 0.3) * 50) + (Math.sin((iy + count) * 0.5) * 50); particle.scale.x = particle.scale.y = (Math.sin((ix + count) * 0.3) + 1) * 4 + (Math.sin((iy + count) * 0.5) + 1) * 4; } } renderer.render(scene, camera); count += 0.1; }全部代码如下。Tips：在官方示例“canvas_particles_waves.html”基础上，修改一些参数和删除一些多余代码。
<!DOCTYPE html><html lang="en"><head> <title>three.js canvas - particles - waves</title> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0"> <style> body { background-color: #000000; margin: 0px; overflow: hidden; } #waves-box { opacity: 0.6; }</style></head><body> <div id="waves-box"></div> <script src="js/three.js"></script> <script src="js/Projector.js"></script> <script src="js/CanvasRenderer.js"></script> <script> var SEPARATION = 150, // 间隔 AMOUNTX = 100, // 控制X轴数量 AMOUNTY = 50; // 控制Y轴数量 var camera, scene, renderer; var particles, particle, count = 0; init(); animate(); function init() { // 相机 camera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 1, 10000); camera.position.z = 1000; camera.position.y = 500; scene = new THREE.Scene(); // 场景 // 粒子 particles = new Array(); var PI2 = Math.PI * 2; var material = new THREE.SpriteCanvasMaterial({ color: 0xffffff, program: function(context) { context.beginPath(); context.arc(0, 0, 0.5, 0, PI2, true); context.fill(); } }); var i = 0; for (var ix = 0; ix < AMOUNTX; ix++) { for (var iy = 0; iy < AMOUNTY; iy++) { particle = particles[i++] = new THREE.Sprite(material); particle.position.x = ix * SEPARATION - ((AMOUNTX * SEPARATION) / 2); particle.position.z = iy * SEPARATION - ((AMOUNTY * SEPARATION) / 2); scene.add(particle); } } // 渲染器 renderer = new THREE.CanvasRenderer(); renderer.setPixelRatio(window.devicePixelRatio); renderer.setSize(window.innerWidth, window.innerHeight); document.getElementById('waves-box').appendChild(renderer.domElement); } // 动画 function animate() { requestAnimationFrame(animate); render(); } // 渲染 function render() { var i = 0; for (var ix = 0; ix < AMOUNTX; ix++) { for (var iy = 0; iy < AMOUNTY; iy++) { particle = particles[i++]; particle.position.y = (Math.sin((ix + count) * 0.3) * 50) + (Math.sin((iy + count) * 0.5) * 50); particle.scale.x = particle.scale.y = (Math.sin((ix + count) * 0.3) + 1) * 4 + (Math.sin((iy + count) * 0.5) + 1) * 4; } } renderer.render(scene, camera); count += 0.1; }</script></body></html> 版权声明：
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