先看效果：
?
Snow.as：
package{
import flash.display.*;
import flash.events.*;
public class Snow extends Sprite{
??public var radius:Number;
??public var angle:Number;
??public var speed:Number;
??public function Snow(){
? ?init();
? ?addEventListener(Event.ENTER_FRAME,enterFrameHandler);
??}
??public function init():void{
? ?radius=Math.random()*2;
? ?angle=(Math.random()+0.5)*Math.PI/2;
? ?speed=Math.random()+1;
? ?x=Math.random()*550;
? ?y=0;
? ?alpha=Math.random();
? ?graphics.clear();
? ?graphics.beginFill(0xffffff);
? ?graphics.drawCircle(0,0,radius);
? ?graphics.lineTo(100,100);
??}
??public function enterFrameHandler(e:Event):void{
? ?x+=speed*Math.cos(angle);
? ?y+=speed*Math.sin(angle);
? ?if(y>400||x550){
? ? init();
? ?}
??}
}
}
Snow.fla：
var num:int=0;
var lable:TextField=new TextField();
lable.textColor=0xffffff;
lable.htmlText = "sliz";
lable.addEventListener(MouseEvent.MOUSE_DOWN,mouseDownHandler);
lable.x=520;
lable.y=380;
addChild(lable);
stage.addEventListener(Event.ENTER_FRAME,enterFrameHandler);
function enterFrameHandler(e:Event):void {
if (num??addChild(new Snow());
??num++;
} else {
??stage.removeEventListener(Event.ENTER_FRAME,enterFrameHandler);
}
}
function mouseDownHandler(e:MouseEvent):void {
navigateToURL( new URLRequest ("http://space.flash8.net/space/?534614" ) );
}
源文件下載：

snow.rar

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本文轉自：http://www.5uflash.com/flashjiaocheng/Flashdonghuatexiao/4803.html

最逼真透明雪花飄落特效