HTML5 Canvas下雪效果插件特效代码

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以下是 HTML5 Canvas下雪效果插件特效代码的示例演示效果:

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部分效果截图:

HTML代码(index.html):

<!doctype html>
<html>
<head>
	<meta charset="gb2312">
	<title>HTML5 Canvas��ѩЧ�����</title>
	<script type="text/javascript" src="js/jquery-1.9.1.js"></script>
  <script type="text/javascript" src="js/jquery.let_it_snow.js"></script>
  <style>
    html {
      height: 100%;
    }
    body {
      background: #090b44; /* Old browsers */
      background: -moz-radial-gradient(center, ellipse cover, #090b44 0%, #00001c 100%); /* FF3.6+ */
      background: -webkit-gradient(radial, center center, 0px, center center, 100%, color-stop(0%,#090b44), color-stop(100%,#00001c)); /* Chrome,Safari4+ */
      background: -webkit-radial-gradient(center, ellipse cover, #090b44 0%,#00001c 100%); /* Chrome10+,Safari5.1+ */
      background: -o-radial-gradient(center, ellipse cover, #090b44 0%,#00001c 100%); /* Opera 12+ */
      background: -ms-radial-gradient(center, ellipse cover, #090b44 0%,#00001c 100%); /* IE10+ */
      background: radial-gradient(ellipse at center, #090b44 0%,#00001c 100%); /* W3C */
      filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#090b44', endColorstr='#00001c',GradientType=1 ); /* IE6-9 fallback on horizontal gradient */
      padding: 0;
      text-align: center;
      font-family: 'open sans';
      position: relative;
      margin: 0;
      height: 100%;
      padding-bottom: 50px;
      box-sizing: border-box;
      -webkit-box-sizing: border-box;
      -moz-box-sizing: border-box;
    }
    
    .wrapper {
    	height: auto !important;
    	height: 100%;
    	margin: 0 auto; 
    	overflow: hidden;
    }
    
    a {
      text-decoration: none;
    }
    
    
    h1, h2 {
      width: 100%;
      float: left;
    }
    h1 {
      margin-top: 100px;
      color: #1D3185;
      text-shadow: 0 1px 5px rgba(0,0,0,0.5);
      margin-bottom: 5px;
      font-size: 70px;
      letter-spacing: -4px;
    }
    h2 {
      color: #3C487A;
      font-weight: bold;
      margin-top: 0;
      margin-bottom: 10px;
    }
    
    .pointer {
      position: fixed;
      bottom: 10px;
      left: 50%;
      margin-left: -245px;
      color: #2744BE;
      font-family: 'Open Sans', cursive;
      font-weight: 400;
      font-style: italic;
      font-size: 14px;
      margin-top: 15px;
    }
    pre {
      margin: 80px auto;
    }
    pre code {
      padding: 35px;
      border-radius: 5px;
      font-size: 15px;
      background: rgba(0,0,0,0.1);
      border: rgba(0,0,0,0.05) 5px solid;
      max-width: 500px;
    }


    .main {
      float: left;
      width: 100%;
      margin: 0 auto;
    }
    
    
    .main h1 {
      padding:20px 50px;
      float: left;
      width: 100%;
      font-size: 60px;
      box-sizing: border-box;
      -webkit-box-sizing: border-box;
      -moz-box-sizing: border-box;
      font-weight: 100;
      margin: 0;
      padding-top: 25px;
      font-family: 'Pacifico';
      letter-spacing: 2px;
    }
   
    .main h1.demo1 {
      background: #1ABC9C;
    }
    
    .reload.bell {
      font-size: 12px;
      padding: 20px;
      width: 45px;
      text-align: center;
      height: 47px;
      border-radius: 50px;
      -webkit-border-radius: 50px;
      -moz-border-radius: 50px;
    }
    
    .reload.bell #notification {
      font-size: 25px;
      line-height: 140%;
    }
    
    .reload, .btn{
      display: inline-block;
      border: 4px solid #A2261E;
      border-radius: 5px;
      -moz-border-radius: 5px;
      -webkit-border-radius: 5px;
      background: #CC3126;
      display: inline-block;
      line-height: 100%;
      padding: 0.7em;
      text-decoration: none;
      color: #2744BE;
      width: 100px;
      line-height: 140%;
      font-size: 17px;
      font-family: open sans;
      font-weight: bold;
    }
    .reload:hover{
      background: #A2261E;
    }
    .btn {
      width: 200px;
      color: #2744BE;
      border: none;
      margin-left: 10px;
      background: rgba(0, 0, 0, 0.31);
    }
    .clear {
      width: auto;
    }
    .btn:hover, .btn:hover {
      background: rgba(0,0,0,0.5);
    }
    .btns {
      width: 410px;
      margin: 50px auto;
    }
    .credit {
      font-style: italic;
      text-align: center;
      color: #1D3185;
      padding: 10px;
      margin: 0 0 40px 0;
      float: left;
      width: 100%;
    }
    
    .pointer a {
      color: #2744BE;
      text-decoration: none;
      font-weight: bold;
    }
    
    .credit a {
      color: #2744BE;
      text-decoration: none;
      font-weight: bold;
    }
    
    .back {
      position: absolute;
      top: 0;
      left: 0;
      text-align: center;
      display: block;
      padding: 7px;
      width: 100%;
      box-sizing: border-box;
      -moz-box-sizing: border-box;
      -webkit-box-sizing: border-box;
      background: rgba(0, 0, 0, 0.35);
      font-weight: bold;
      font-size: 13px;
      color: #2744BE;
      -webkit-transition: all 200ms ease-out;
      -moz-transition: all 200ms ease-out;
      -o-transition: all 200ms ease-out;
      transition: all 200ms ease-out;
    }
    .back:hover {
      background: rgba(0, 0, 0, 0.85);
    }
    canvas {
      display: block;
      width: 100%;
      height: 100%;
      top: 0;
      left: 0;
      position: fixed;
    }
    .header {
      position: relative;
    }
    canvas.flare {
      opacity: 0.5;
    }
	</style>
	<script>
	  $(document).ready( function() {
	     $("canvas.flare").let_it_snow({
  	      windPower: 0,
  	      speed: 0,
  	      color: "#392F52",
  	      size:120,
  	      opacity: 0.00000001,
  	      count: 40,
  	      interaction: false
  	    });
  	    $("canvas.snow").let_it_snow({
    	      windPower: 3,
    	      speed: 1,
    	      count: 250,
    	      size: 0,
    	  });
    	  $("canvas.flake").let_it_snow({
    	      windPower: -3,
    	      speed: 1,
    	      count: 20,
    	      size: 10,
    	      image: "images/white-snowflake.png"
    	  });
    	  
	  });
		</script>
  </head>
  <body>
  <canvas width="100%" height="100%" class="flare"></canvas>
  <canvas width="100%" height="100%" class="snow"></canvas>
  <canvas width="100%" height="100%" class="flake"></canvas>
</body>
</html>

CSS代码(demo.css):

body .one .bsa_it_ad{background:transparent;border:none;font-family:inherit;padding:0 15px 0 10px;margin:0;text-align:center;}
body .one .bsa_it_ad:hover img{-moz-box-shadow:0 0 3px #000;-webkit-box-shadow:0 0 3px #000;box-shadow:0 0 3px #000;}
body .one .bsa_it_ad .bsa_it_i{display:block;padding:0;float:none;margin:0 0 5px;}
body .one .bsa_it_ad .bsa_it_i img{padding:0;border:none;}
body .one .bsa_it_ad .bsa_it_t{padding:6px 0;}
body .one .bsa_it_ad .bsa_it_d{padding:0;font-size:12px;color:#333;}
body .one .bsa_it_p{display:none;}
body #bsap_aplink,body #bsap_aplink:hover{display:block;font-size:10px;margin:12px 15px 0;text-align:center;}
.ads{position:fixed;left:10px;bottom:10px;background:rgba(255,255,255,0.8);border-radius:0px 0px 3px 3px;padding:10px;box-sizing:border-box;-webkit-box-sizing:border-box;-moz-box-sizing:border-box;z-index:99;text-align:center;max-width:180px;}
.ads a{color:black;}
.ad-header{margin:-10px -10px 10px -10px;background:white;border-radius:3px 3px 0 0;overflow:hidden;}
.ad-header a{float:right;border-left:1px solid #f3f3f3;padding:10px;line-height:100%;font-weight:bold;text-transform:uppercase;text-align:center;color:black;}
.ad-header a:hover{background:#eee;}

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