Flash初哥

 
 
 
var BitmapData0:BitmapData = new BitmapData(550, 400, false, 0x0);
var Bitmap0:Bitmap = new Bitmap(BitmapData0);
addChild(Bitmap0);
var dotArr:Array = new Array();
stage.addEventListener(MouseEvent.MOUSE_DOWN,mouse_down);
function mouse_down(evt:MouseEvent) {
     var color:Number = 0xff000000+int(Math.random()*0xffffff);
     for (var i:Number = 0; i<500; i++) {
         var v:Number = Math.random()*10;
         var a:Number =Math.random()*Math.PI*2;
         var xx:Number = v*Math.cos(a)+stage.mouseX;
         var yy:Number = v*Math.sin(a)+stage.mouseY;
         var mouseP:Point=new Point(stage.mouseX,stage.mouseY);
         if (Math.random()>0.6) {
             var cc:Number = 0xffffffff;
         } else {
             cc= color;
         }
         dotArr.push([xx, yy, v*Math.cos(a), v*Math.sin(a), cc,mouseP]);
     }
}
 
var cf:ConvolutionFilter = new ConvolutionFilter(3, 3, [1, 1, 1, 1, 32, 1, 1, 1, 1], 40,0);
stage.addEventListener(Event.ENTER_FRAME,enter_frame);
function enter_frame(evt:Event) {
     for (var i:Number = 0; i<dotArr.length; i++) {
         BitmapData0.setPixel32(dotArr[i][0],dotArr[i][1],dotArr[i][4]);
         dotArr[i][0] += dotArr[i][2]*Math.random();
         dotArr[i][1] += dotArr[i][3]*Math.random();
         var dotP:Point=new Point(dotArr[i][0],dotArr[i][1]);
         var b1:Boolean=Point.distance(dotP,dotArr[i][5])>80;
         var b2:Boolean=Math.abs(dotArr[i][2])+Math.abs(dotArr[i][3])<0.5;
         if ((b1 || b2) && Math.random()>0.9) {
             dotArr.splice(i,1);
         }
     }
     BitmapData0.applyFilter(BitmapData0.clone(),BitmapData0.rect,new Point(0, 0),cf);
}