冬天到了，少不了这样的动画效果（领导让加圣诞背景音乐）
效果查看地址：
1、PC端：https://www.huijindaicn.com/i…
<!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" />
<title>{$title}</title>
<style type="text/css">
body {
/*background:url(images/bg.jpg) center no-repeat;*/
margin:0px;
}*
image{ width:100%; }
canvas{ position: fixed; top:0; }
/* 背景音乐开关按钮 */
.music{
width:50px;height:50px;
background:url(/cghd/201612/images/close.png) no-repeat;
background-color: #b91b10;
position: fixed;
top:30%;
right:10px;
cursor: pointer;
border-radius: 25px;
z-index: 9999;
}
.music:hover{
background-color: #b91b10;
}
</style>
</head>
<body>
<img src="/cghd/201612/images/bg.jpg">
<script type="text/javascript" src="/cghd/201612/js/ThreeCanvas.js"></script>
<script type="text/javascript" src="/cghd/201612/js/Snow.js"></script>
<script type="text/javascript">
var SCREEN_WIDTH = window.innerWidth;
var SCREEN_HEIGHT = window.innerHeight;
var container;
var particle;
var camera;
var scene;
var renderer;
var mouseX = 0;
var mouseY = 0;
var windowHalfX = SCREEN_WIDTH / 2;
var windowHalfY = SCREEN_HEIGHT / 2;
var particles = [];
var particleImage = new Image();//THREE.ImageUtils.loadTexture( "img/ParticleSmoke.png" );
particleImage.src = '/cghd/201612/images/ParticleSmoke.png';
function init() {
container = document.createElement('div');
document.body.appendChild(container);
camera = new THREE.PerspectiveCamera( 75, SCREEN_WIDTH / SCREEN_HEIGHT, 1, 10000 );
camera.position.z = 1000;
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++) {
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);
}
container.appendChild( renderer.domElement );
document.addEventListener( 'mousemove', onDocumentMouseMove, false );
setInterval( loop, 1000 / 60 );
}
function onDocumentMouseMove( event ) {
mouseX = event.clientX - windowHalfX;
mouseY = event.clientY - windowHalfY;
}
function loop() {
for(var i = 0; i<particles.length; i++)
{
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);
renderer.render( scene, camera );
}
window.onload = init;
/*背景音乐开关控制*/
$('.music').on({
'click':function(){
var flag = $(this).attr('data-flag');
if(flag == 'open'){
audio.pause();
$(this).attr('data-flag','close');
$(this).css('background','url(/cghd/201612/images/open.png)');
$(this).css('background-color','#31628d');
}else{
audio.play();
$(this).attr('data-flag','open');
$(this).css('background','url(/cghd/201612/images/close.png)');
$(this).css('background-color','#b91b10');
}
},
});
</script>
</body>
</html>
2、WAP端：https://www.huijindaicn.com/w…
注意：在wap端，canvas 元素在页面最上层，遮挡了页面下层所有元素，导致无法选中页面下层的元素，所以另外加了触摸事件，其他与PC端相同
为页面添加触摸事件，使 canvas 元素 在用户触摸屏幕时排在页面元素的最底层，代码如下：
var canvas = document.getElementsByTagName('canvas');
document.addEventListener('touchstart', function(){
canvas[0].setAttribute("style","z-index:-1");
}, false);
document.addEventListener('touchmove', function(){
canvas[0].setAttribute("style","z-index:-1");
}, false);
document.addEventListener('touchend', function(){
canvas[0].removeAttribute("style");
}, false);