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今天小编跟大家讲解下有关html5的canvas实现3d雪花飘舞效果 ，相信小伙伴们对这个话题应该有所关注吧，小编也收集到了有关html5的canvas实现3d雪花飘舞效果 的相关资料，希望小伙伴们看了有所帮助。

复制代码代码如下:var SCREEN_WIDTH = window.innerWidth; var SCREEN_HEIGHT = window.innerHeight;</p><p> var container;</p><p> var particle;</p><p> var camera; var scene; var renderer;</p><p> var mouseX = 0; var mouseY = 0;</p><p> var windowHalfX = window.innerWidth / 2; var windowHalfY = window.innerHeight / 2; var particles = []; var particleImage = new Image();//THREE.ImageUtils.loadTexture("img/ParticleSmoke.png"); particleImage.src = 'images/ParticleSmoke.png'; </p><p> function init() {</p><p> container = document.createElement('div'); document.body.appendChild(container);</p><p> camera = new THREE.PerspectiveCamera( 75, SCREEN_WIDTH / SCREEN_HEIGHT, 1, 10000 ); camera.position.z = 1000;</p><p> scene = new THREE.Scene(); scene.add(camera); renderer = new THREE.CanvasRenderer(); renderer.setSize(SCREEN_WIDTH, SCREEN_HEIGHT); var material = new THREE.ParticleBasicMaterial( { map: new THREE.Texture(particleImage) } ); for (var i = 0; i < 500; i++) {</p><p> particle = new Particle3D( material); particle.position.x = Math.random() * 2000 - 1000; particle.position.y = Math.random() * 2000 - 1000; particle.position.z = Math.random() * 2000 - 1000; particle.scale.x = particle.scale.y = 1; scene.add( particle ); particles.push(particle); }</p><p> container.appendChild( renderer.domElement );</p><p> document.addEventListener( 'mousemove', ondocumentMouseMove, false ); document.addEventListener( 'touchstart', ondocumentTouchStart, false ); document.addEventListener( 'touchmove', ondocumentTouchMove, false ); setInterval( loop, 1000 / 60 ); } function ondocumentMouseMove( event ) {</p><p> mouseX = event.clientX - windowHalfX; mouseY = event.clientY - windowHalfY; }</p><p> function ondocumentTouchStart( event ) {</p><p> if ( event.touches.length == 1 ) {</p><p> event.preventDefault();</p><p> mouseX = event.touches[ 0 ].pageX - windowHalfX; mouseY = event.touches[ 0 ].pageY - windowHalfY; } }</p><p> function ondocumentTouchMove( event ) {</p><p> if ( event.touches.length == 1 ) {</p><p> event.preventDefault();</p><p> mouseX = event.touches[ 0 ].pageX - windowHalfX; mouseY = event.touches[ 0 ].pageY - windowHalfY; } }</p><p> //</p><p> function loop() {</p><p> for(var i = 0; i<particles.length; i++) {</p><p> var particle = particles[i]; particle.updatePhysics(); with(particle.position) { if(y<-1000) y+=2000; if(x>1000) x-=2000; else if(x<-1000) x+=2000; if(z>1000) z-=2000; else if(z<-1000) z+=2000; } } camera.position.x += ( mouseX - camera.position.x ) * 0.05; camera.position.y += ( - mouseY - camera.position.y ) * 0.05; camera.lookAt(scene.position); </p><p> renderer.render( scene, camera );</p><p> }

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