forked from: Flurryを作．．．れなかった

/**
 * Copyright hakerlab ( http://wonderfl.net/user/hakerlab )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/8hSn
 */

// forked from geko's Flurryを作．．．れなかった
package {
    import flash.display.Sprite;
    import flash.display.Bitmap;
    import flash.display.BitmapData;
    import flash.events.Event;
    
    [SWF(frameRate="60")]
    public class FlashTest extends Sprite {
        private var bmp:Bitmap = new Bitmap();
        private var flurry:Flurry;
        private var i:Number = 0;
        
        public function FlashTest() {
            bmp.bitmapData = new BitmapData(stage.stageWidth, stage.stageHeight, false, 0x000000);
            addChild(bmp);
            addEventListener(Event.ENTER_FRAME, loop);
        }
        
        public function loop(event:Event):void{
            i+=0.02;
            flurry = new Flurry(3, Math.sin(Math.PI/2*i), 0.03, 0);
            // ↓こっちでnewしたら煙っぽい
            // flurry = new Flurry(Math.cos(Math.PI/2*i)*0.5, -1, Math.random(), -0.5);
            
            addChild(flurry);
            flurry.x = mouseX;
            flurry.y = mouseY;
            flurry.addEventListener(Event.ENTER_FRAME, function update(event:Event):void{
                var target:Flurry = event.target as Flurry;
                target.update();
                
                if(Math.min(Math.max(target.x, -3), stage.stageWidth+3) == target.x && 
                Math.min(Math.max(target.y, -3), stage.stageHeight+3) == target.y) return;
                
                target.removeEventListener(Event.ENTER_FRAME, update);
                removeChild(target);
                target = null;
            });
        }

    }
}

import flash.display.Shape;
import flash.display.BlendMode;
import flash.events.Event;
import flash.filters.BlurFilter;

class Flurry extends Shape{
    private var filter:BlurFilter = new BlurFilter(10, 10, 3);
    private var spout:Object = new Object();
    private var wind:Object = new Object();
    
    public function Flurry(spoutX:Number = 0, spoutY:Number = 0, windX:Number = 0, windY:Number = 0):void{
        blendMode = BlendMode.ADD;
        filters = [filter];
        spout.x = spoutX;
        spout.y = spoutY;
        wind.x = windX;
        wind.y = windY;
        
        graphics.beginFill(0x33CCCC);
        graphics.drawCircle(0, 0, 6);
        graphics.endFill();
    }
    public function update():void{
        spout.x += wind.x;
        spout.y += wind.y;
        x += spout.x;
        y += spout.y;
        alpha -= 0.005;
    }
}