降雪っぽく。

by seino 24 May 2010

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ぼかし
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/**
 * Copyright seino ( http://wonderfl.net/user/seino )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/aL7V
 */

package { 
    import flash.display.Sprite;
    import flash.display.MovieClip;
    import flash.geom.Vector3D;
    import flash.geom.Point;
    import flash.events.Event;
    
    [SWF(width="400", height="400", backgroundColor="#000000", frameRate="50")]    
    public class ClickDraw extends Sprite{
        
        public function ClickDraw():void {
           //消失点の設定
           transform.perspectiveProjection.projectionCenter = new Point(stage.width/2, stage.height/2);
           addEventListener(Event.ENTER_FRAME,onMouseMove);
    }
            
        private function onMouseMove(e:Event):void {
            var rX:int =  Math.random() * stage.stageWidth;  
            var rY:int =  Math.random() * stage.stageHeight;  
            var nR:int = Math.ceil(Math.random() * 10) * (Math.random() * 5);
            var color:int = 0x99ffff;
            var oneCircle:MovieClip = new DrawCircle(rX 
                                                     ,rY
                                                     ,nR
                                                     ,color);
            oneCircle.x = rX;
            oneCircle.y = rY;
            oneCircle.z = 0;  //z座標を設定しておかないと回転が上手くいかない。
            
            stage.addChild(oneCircle);
        }
    }
}

    import flash.display.MovieClip;
    import flash.events.Event;
    import flash.geom.Vector3D;
    import flash.filters.BlurFilter;
    class DrawCircle extends MovieClip{
          private var defPoint:int;
          public function DrawCircle(centerX:int
                                   ,centerY:int
                                   ,r:int
                                   ,color:int){
          graphics.beginFill(color);
          graphics.drawCircle(x,y,r);
          graphics.endFill();
          addEventListener(Event.ENTER_FRAME,fadeOut);  

        }
        
        private function fadeOut(e:Event):void{
          var myFilters:Array = new Array();
          var blurNm:int = z * 0.1;
          var filter:BlurFilter = new BlurFilter(blurNm,blurNm,1);
          myFilters.push(filter);
          
          filters =  myFilters;
          z       += 3;
          alpha   -= 0.01;
          
          //ただの遊びの痕跡。
         // transform.matrix3D.prependRotation(5*(1*Math.random()),Vector3D.X_AXIS);
         // transform.matrix3D.prependRotation(5*(1*Math.random()),Vector3D.Y_AXIS);
         // transform.matrix3D.prependRotation(5*(1*Math.random()),Vector3D.Z_AXIS);

          if(alpha <= 0){
             stage.removeChild(this);
          }
        
        }

      }