FLASH AS3.0制作逼真涟漪

　　

详细代码：

stage.frameRate=80;
function init(x1:Number,y1:Number) { 
        var mc:MovieClip=new MovieClip(); 
        addChildAt(mc,1); 
        mc.x=x1; 
        mc.y=y1; 
        mc.graphics.lineStyle(0.5,0xbbffff,0.6); 
        mc.graphics.drawEllipse(-1,-0.3,2,0.6); 
        mc.addEventListener(Event.ENTER_FRAME,frame); 
        var v0=0.5+0.3*Math.random(); 
        function frame(e) { 
                mc.scaleX=mc.scaleY+=v0; 
                mc.alpha>0?mc.alpha-=0.02:[mc.removeEventListener(Event.ENTER_FRAME,frame),removeChild(mc),mc=null]; 
        }
}
function xiayu() { 
        var timer:Timer=new Timer(200,2); 
        timer.addEventListener(TimerEvent.TIMER,onTimer); 
        var mc:MovieClip=new MovieClip(); 
        mc.graphics.beginFill(0xbbffff,0.8); 
        mc.graphics.drawEllipse(-0.5,-2,1,4); 
        addChildAt(mc,1); 
        mc.scaleX=mc.scaleY=0.7+0.3*Math.random(); 
        var x0=mc.x=50+Math.random()*450; 
        mc.y=-10-20*Math.random(); 
        var y0=30+350*Math.random(); 
        mc.addEventListener(Event.ENTER_FRAME,frameB); 
        function frameB(e) { 
                if (mc.y<y0) { 
                        mc.y+=5; 
                } else { 
                        mc.removeEventListener(Event.ENTER_FRAME,frameB); 
                        removeChild(mc); 
                        mc=null; 
                        init(x0,y0); 
                        timer.start(); 
                } 
        } 
        function onTimer(e) { 
               init(x0,y0); 
        }
}
var t:Timer=new Timer(100,0);
t.addEventListener(TimerEvent.TIMER,onT);
t.start();
function onT(e) { 
        xiayu(); 
        xiayu();
}
var tu:Hehua=new Hehua();
addChild(tu);
var kj:MovieClip=new Kj  ;
addChild(kj);