ブラーの練習

/**
 * Copyright hacker_szoe51ih ( http://wonderfl.net/user/hacker_szoe51ih )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/lmzj
 */

package {
    import flash.display.*;
    import flash.events.*;
    import flash.filters.*;
    
    [SWF(width="465",height="465",backgroundColor="0xffffff",fps="45")]
    
    
    import flash.geom.Point;
    public class FlashTest extends Sprite {
    	
    	public var myBall:Ball;
    	public var centerX:Number=stage.stageWidth/2;
    	public var centerY:Number=stage.stageHeight/2;
    	public var pointX:Number;
    	public var pointY:Number;
    	public var blurFilter:BlurFilter;
   
    	
        public function FlashTest() {
           
           init();
            
        }
        
        public function init():void{
        	
        	pointX=centerX;
        	pointY=centerY;
        	blurFilter=new BlurFilter(1,1,1);
        	
        	myBall=new Ball(0xccccff,0x2255ff,0x1111ff,50);        	
        	addChild(myBall);
        	myBall.x=centerX;
        	myBall.y=centerY;
        	
        	stage.addEventListener(MouseEvent.CLICK,onClick);
        	addEventListener(Event.ENTER_FRAME,enterFrame);
        	
        }
        
        
        public function onClick(e:MouseEvent):void{
        		
        		
       		pointX=e.stageX;
       		pointY=e.stageY;
       		
       	
        }
        
        public function enterFrame(e:Event):void{
        		
        		var blurRatio:Number =Math.max(Math.abs((pointX-myBall.x)/5), Math.abs((pointY-myBall.y)/5));
        		blurFilter.blurX=blurRatio;
        		blurFilter.blurY=blurRatio;
        		//blurFilter.blurY=Math.max((pointX-myBall.x)/6,(pointY-myBall.y)/6);
	    		myBall.filters=[blurFilter];
	        	myBall.x+=(pointX-myBall.x)/2*0.2;
	        	myBall.y+=(pointY-myBall.y)/2*0.2;
	        	
	        	if(pointX==myBall.x && pointY==myBall.y){
	        		//removeEventListener(Event.ENTER_FRAME,enterFrame);
	        		myBall.filters=[];
	        		pointX=myBall.x;
	        		pointY=myBall.y;
	        	}
        	
        }
        
    }
}

import flash.display.*;
import flash.geom.Matrix;
import flash.filters.*;
class Ball extends Sprite{
	
	public var type:String;
	public var colors:Array;
	public var alphas:Array;
	public var rations:Array;
	public var spread:String;
	public var interpolation:String;
	public var focalPoint:Number;
	public var mtx:Matrix;
	//public var dropshadow:DropShadowFilter;
	
	
	public function Ball(color1:uint,color2:uint,lineColor:uint,r:Number){
		
		//グラデーションのパラメーターを作る
		//引数1
		type=GradientType.RADIAL;
		//引数2
		colors=[color1,color2];
		//引数3
		alphas=[1,1]
		//引数4
		rations=[0,255];
		//引数5
		mtx=new Matrix();
		mtx.createGradientBox(2*r,2*r,0,0,0);//幅、高さ、方向を指定する角度、水平移動ピクセル数、垂直移動ピクセル数
		mtx.translate(-r,-r);
		mtx.rotate(Math.PI/4);
		//引数6
		spread=SpreadMethod.PAD;
		//引数7
		interpolation="rgb"
		//引数8
		focalPoint=0//グラデーションの焦点の位置
		graphics.beginGradientFill(type,colors,alphas,rations,mtx,spread,interpolation,focalPoint);
		
		//フィルターの作成
		//dropshadow = new DropShadowFilter(5,45,0xcccccc,0.6);
		//filters = [dropshadow];
		
		//図形を描く
		graphics.lineStyle(1,lineColor);
		graphics.drawCircle(0,0,r);
		graphics.endFill();		
		
	}
	
}