首页 网页素材 真实逼真的雪花飘落场景代码 2018年3月30日 0条评论 真实逼真的雪花飘落场景代码 内容 相关 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta name="viewport" content="width=device-width,hight=device-hight,minimum-scale=1.0,maximum-scale=1.0,ser-scalable=none"/> <title>真实逼真的雪花飘落场景代码</title> <style type="text/css"> body { margin: 0; padding: 0; position: relative; background-image: url(http://demo.lanrenzhijia.com/2015/snow0112/images/xh.jpg); background-position: center; /*background-repeat: no-repeat;*/ width: 100%; height: 100%; background-size: 100% 100%; } </style> </head> <body id="body" onLoad="init()"> <script src="http://www.lanrenzhijia.com/ajaxjs/ThreeCanvas.js"></script> <script src="http://www.lanrenzhijia.com/ajaxjs/Snow.js"></script> <script > var SCREEN_WIDTH = window.innerWidth;// var SCREEN_HEIGHT = window.innerHeight; var container; var particle;//粒子 var camera; var scene; var renderer; var starSnow = 1; var particles = []; var particleImage = new Image(); //THREE.ImageUtils.loadTexture( "img/ParticleSmoke.png" ); particleImage.src = 'http://demo.lanrenzhijia.com/2015/snow0112/images/ParticleSmoke.png'; function init() { //alert("message3"); container = document.createElement('div');//container:画布实例; document.body.appendChild(container); camera = new THREE.PerspectiveCamera( 60, SCREEN_WIDTH / SCREEN_HEIGHT, 1, 10000 ); camera.position.z = 1000; //camera.position.y = 50; 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) } ); //alert("message2"); for (var i = 0; i < 500; i++) { //alert("message"); particle = new Particle3D( material); particle.position.x = Math.random() * 2000-1000; particle.position.z = Math.random() * 2000-1000; particle.position.y = Math.random() * 2000-1000; //particle.position.y = Math.random() * (1600-particle.position.z)-1000; particle.scale.x = particle.scale.y = 1; scene.add( particle ); particles.push(particle); } container.appendChild( renderer.domElement ); //document.addEventListener( 'mousemove', onDocumentMouseMove, false ); document.addEventListener( 'touchstart', onDocumentTouchStart, false ); document.addEventListener( 'touchmove', onDocumentTouchMove, false ); document.addEventListener( 'touchend', onDocumentTouchEnd, false ); setInterval( loop, 1000 / 60 ); } var touchStartX; var touchFlag = 0;//储存当前是否滑动的状态; var touchSensitive = 80;//检测滑动的灵敏度; //var touchStartY; //var touchEndX; //var touchEndY; function onDocumentTouchStart( event ) { if ( event.touches.length == 1 ) { event.preventDefault();//取消默认关联动作; touchStartX = 0; touchStartX = event.touches[ 0 ].pageX ; //touchStartY = event.touches[ 0 ].pageY ; } } function onDocumentTouchMove( event ) { if ( event.touches.length == 1 ) { event.preventDefault(); var direction = event.touches[ 0 ].pageX - touchStartX; if (Math.abs(direction) > touchSensitive) { if (direction>0) {touchFlag = 1;} else if (direction<0) {touchFlag = -1;}; //changeAndBack(touchFlag); } } } function onDocumentTouchEnd (event) { // if ( event.touches.length == 0 ) { // event.preventDefault(); // touchEndX = event.touches[ 0 ].pageX ; // touchEndY = event.touches[ 0 ].pageY ; // }这里存在问题 var direction = event.changedTouches[ 0 ].pageX - touchStartX; changeAndBack(touchFlag); } function changeAndBack (touchFlag) { var speedX = 25*touchFlag; touchFlag = 0; for (var i = 0; i < particles.length; i++) { particles[i].velocity=new THREE.Vector3(speedX,-10,0); } var timeOut = setTimeout(";", 800); clearTimeout(timeOut); var clearI = setInterval(function () { if (touchFlag) { clearInterval(clearI); return; }; speedX*=0.8; if (Math.abs(speedX)<=1.5) { speedX=0; clearInterval(clearI); }; for (var i = 0; i < particles.length; i++) { particles[i].velocity=new THREE.Vector3(speedX,-10,0); } },100); } function loop() { for(var i = 0; i<particles.length; i++){ var particle = particles[i]; particle.updatePhysics(); with(particle.position) { if((y<-1000)&&starSnow) {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.lookAt(scene.position); renderer.render( scene, camera ); } </script> </body> </html> 真实逼真的雪花飘落场景代码 点赞  (0) 打赏 分享 支付宝扫一扫 微信扫一扫 企鹅扫一扫