飘雪效果的swf

//第一帧动作

import flash.events.Event;

  for(var k:int=;k<;k++)

 {

   var xuehua:xue= new xue();

         xuehua.alpha = Math.random()+.;

            xuehua.height = xuehua.width = Math.random()*+;

         xuehua.x=Math.random()*;

      xuehua.y=Math.random()*;

         piaoxuekongjian.addChild(xuehua);

 }

addEventListener(Event.ENTER_FRAME,webcyz);

function webcyz(e:Event)

{

 for(var k:int;k<;k++)

 {

     var xuehua:xue= new xue();

     xuehua.alpha = Math.random()+.;

        xuehua.height = xuehua.width = Math.random()*+;

     xuehua.x=Math.random()*;

     piaoxuekongjian.addChild(xuehua);

 }

 //trace(piaoxuekongjian.numChildren);

  for(var i:int=;i<piaoxuekongjian.numChildren;i++)

  {

   var mc:xue = xue(piaoxuekongjian.getChildAt(i));

   if(mc.y>)

   {

   piaoxuekongjian.removeChild(mc);

   i--;

   }

   else

   {

     mc.y+=Math.random()*;

     mc.x+=(Math.random()-.)*;

   }

  }

}

//项目库中雪花的子类

package  {

 import flash.display.MovieClip;

 public class xue extends MovieClip {

  public function xue() {

   // constructor code

  }

 }

}

cs6源代码