槍が降ったらオーロラが出た

思いつきで作ったらこんなんなった。

by cpu_t 19 Mar 2010

• Related works: 1

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fire particules 弹幕
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/**
 * Copyright cpu_t ( http://wonderfl.net/user/cpu_t )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/bxKH
 */

// 思いつきで作ったらこんなんなった。
// 
package {
	import adobe.utils.CustomActions;
	import flash.display.Bitmap;
	import flash.display.BitmapData;
    import flash.display.Sprite;
	import flash.events.Event;
	import flash.events.MouseEvent;
	import flash.filters.BlurFilter;
	import flash.geom.Matrix;
    public class Pillars extends Sprite
	{
		private var bdView:BitmapData;
		private var movingpillars:Array;
		private var filter:BlurFilter;
		
        public function Pillars()
		{
			graphics.beginFill(0);
			graphics.drawRect(0, 0, stage.stageWidth, stage.stageHeight);
			
			bdView = new BitmapData(stage.stageWidth, stage.stageHeight, true, 0);
			addChild(new Bitmap(bdView));
			
			filter = new BlurFilter(2, 8);
			
			reset();
			
			stage.addEventListener(MouseEvent.MOUSE_DOWN, function(e:MouseEvent):void
			{
				count = 0;
				isStop = false;
				
				//bdView.fillRect(bdView.rect, 0);
				for (var index:int = 0; index < movingpillars.length; index++)
				{
					removeChild(movingpillars[index]);
				}
				
				removeEventListener(Event.ENTER_FRAME, onUpdate);
				
				reset();
			});
		}
		
		private function reset():void
		{
			movingpillars = new Array();
			addEventListener(Event.ENTER_FRAME, onUpdate);
		}
		
		private var count:Number = 0;
		private var isStop:Boolean = false;
		private function onUpdate(e:Event):void 
		{
			if (count > bdView.height + 40)
			{
				isStop = true;
			}
			
			for (var index:int = 0; index < movingpillars.length; index++)
			{
				var item:Sprite = movingpillars[index];
				item.x += Math.cos((90+item.rotation) * Math.PI / 180)*20;
				item.y += Math.sin((90+item.rotation) * Math.PI / 180)*20;
				if (item.y > bdView.height-count)
				{
					count += .04;
					var mat:Matrix = new Matrix();
					mat.rotate((item.rotation) * Math.PI / 180);
					mat.translate(item.x, item.y);
					bdView.draw(item, mat, null, "add");
					removeChild(item);
					movingpillars.splice(index, 1);
					index--;
				}
			}
			bdView.applyFilter(bdView, bdView.rect, bdView.rect.topLeft, filter);
			for (var i:int = 0; i < 16&&!isStop; i++)
			{
				var sp:Sprite = new Sprite();
				var color:uint = 0xFFFFFF*0;
				var h:Number = Math.random() * 3;
				if (h < 1)
				{
					color += int(0xFF * h) << 16;
					color += int(0xFF * (1-h)) << 8;
				}
				else if (h < 2)
				{
					color -= 1;
					color += int(0xFF * h) << 8;
					color += int(0xFF * (1 - h));
				}
				else
				{
					color -= 2;
					color += int(0xFF * h)
					color += int(0xFF * (1-h)) << 16;
				}
				sp.graphics.beginFill(color);
				sp.graphics.drawRect( -1, -30, 2, 30);
				addChild(sp);
				sp.x = Math.random() * bdView.width;
				sp.y = Math.random() * -10 - 20;
				sp.rotation = (Math.random() - .5) * 30;
				var w:Number = Math.random() * 8;
				sp.filters = [new BlurFilter(w, w)];
				movingpillars.push(sp);
			}
		}
    }
}