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xuehua.html
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xuehua.html
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<!<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<style type="text/css">
body {
background-color: #11113f;
color: white;
font-family: 'Petit Formal Script', cursive;
overflow: hidden;
}
.title {
position: absolute;
text-align: center;
top: 50%;
left: 50%;
-webkit-transform: translate3d(-50%, -50%, 0);
transform: translate3d(-50%, -50%, 0);
z-index: 0;
font-size: 1.6em;
}
.snow {
position: absolute;
background-color: purple;
border-radius: 100%;
}
</style>
</head>
<body>
<div class="title">
<h1>Happy Holidays</h1>
</div>
<audio src="//katiebaca.com/codepen/merry-christmas-mr-lawrence.mp3" autoplay loop></audio>
<script type="text/javascript">
(function() {
//常用方法
function random(min, max, isInt) {
var a = min + Math.random() * (max - min);
return isInt ? parseInt(a) : a;
}
//Snow构造方法
function Snow() {
this.init();
this.draw();
}
//雪花的初始化
Snow.prototype.init = function() {
//大小 、颜色（透明度）、位置（x,y）、速度（水平方向的速度和垂直方向的速度）
this.size = random(2, 10, true);
this.alpha = random(0.3, 1, false);
this.x = random(0, Weather.width, true);
this.y = random(-Weather.height, 0, true);
this.z = random(0, 10, true);
this.wind = random(0, Weather.wind, true);
this.speed = random(1, 3, false);
this.reduce = random(1, 4, true);
this.angle = 0;
this.angleSpeed = random(0, 2 * Math.PI, false) / 100;
}
//雪花的 绘制
Snow.prototype.draw = function() {
this.o = document.createElement("div");
this.o.className = "snow";
document.body.appendChild(this.o);
this.o.style.width = this.o.style.height = this.size + "px";
this.o.style.opacity = this.alpha;
this.o.style.left = this.x + "px";
this.o.style.top = this.y + "px";
this.o.style.zIndex = this.z;
this.o.style.filter = blur(this.reduce + 'px');
}
//雪花运动
Snow.prototype.update = function() {
this.angle += this.angleSpeed;
this.x += Math.cos(this.angle);
this.x += this.wind;
this.y += this.speed;
if(this.y > Weather.height) {
this.init();
}
this.o.style.left = this.x + "px";
this.o.style.top = this.y + "px";
}
//天气对象的设置
var Weather = {
num: 100,
snowLevel: function(level) {
var a;
switch(level) {
case 'b':
a = 1000;
break;
case 'm':
a = 500;
break;
case 's':
a = 100;
break;
default:
break;
};
return Weather.num = a;
},
windDirection: 3,
width: window.innerWidth,
height: window.innerHeight,
snowArray: new Array(),
wind: 1,
createSnows: function() {
for(var i = 0; i < Weather.num; i++) {
var s = new Snow();
Weather.snowArray.push(s);
}
},
runSnows: function() {
for(var i = 0; i < Weather.num; i++) {
Weather.snowArray[i].update();
}
requestAnimationFrame(Weather.runSnows);
},
resize: function() {
Weather.width = window.innerWidth;
Weather.height = window.innerHeight;
console.log(Weather.width);
}
}
Weather.snowLevel('s');
Weather.createSnows();
Weather.runSnows();
addEventListener("resize", Weather.resize);
}());
</script>
</body>
</html>