jQuery雪花缓慢飘落图标特效

jQuery雪花缓慢飘落图标特效是一款html5雪花字体制作下雪天缓缓飘落各种雪花图标特效。

var fa = false;
  //more layers and css blur will cause performance drop
 var layer2 = new Layer(16, 6);
 setInterval(layer2.addIcon, 150);

 var layer1 = new Layer(32, 4);
 setInterval(layer1.addIcon, 300);

 function Layer(fontSize, speed){
  this.addIcon = function(){
   var random_icon = icons[Math.floor(Math.random()*icons.length)];
   $random_x = Math.floor((Math.random() * 600) + 1);
   
   if(fa){
    var $icon = $('<i style="font-size:' + fontSize + 'px;" class="fa ' + random_icon + '" aria-hidden="true"></i>').appendTo(".scene");
   }else{
    var $icon = $('<i style="font-size:' + fontSize + 'px;" class="fa fa-snowflake-o" aria-hidden="true"></i>').appendTo(".scene");
   }

   //initial position
   TweenLite.to($icon, 0, {x: $random_x, color: "#2222ff", y: -80});

   //main animation
   TweenLite.to($icon, speed, {color: "#ff00ff", y: 600, x: $random_x + (Math.random() * 400), opacity: 0, ease:Linear.easeNone, onComplete: deleteIcon, onCompleteParams: ["{self}"]});

   //rotate animation
   var rotation_speed = (Math.random() + 10);
   TweenMax.to($icon, rotation_speed, {rotation: 390, ease:Linear.easeNone, repeat: -1});
  };