float cross

2009.09.29 effect追加 
2009.09.29 Bitmap化で動作軽くなった？

by iong 29 Sep 2009

• Related works: 1

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/**
 * Copyright iong ( http://wonderfl.net/user/iong )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/iYM7
 */

package
{
    /* 2009.09.29 effect追加 */
    /* 2009.09.29 Bitmap化で動作軽くなった？ */
	import flash.display.Sprite;

	[SWF(width="465", height="465", backgroundColor="0x003366", frameRate="30")]

	public class Rad extends Sprite
	{
		import flash.display.Bitmap;
		import flash.display.BitmapData;

		import flash.events.Event;
		import flash.display.BlendMode;
		import flash.geom.Matrix;
		import flash.geom.Point;
		import flash.filters.BlurFilter;
		import flash.display.StageQuality;
		import flash.display.StageAlign;
		import flash.display.StageScaleMode;

		var Sp:Bitmap;
		var SpR:Sprite;
		var cv:BitmapData;

		var arySp:Array = new Array();

		var iP1:uint  = 2;
		var iP2:uint  = 1;

		public function Rad():void
		{
			stage.quality   = StageQuality.LOW;
			stage.scaleMode = StageScaleMode.NO_SCALE;
			stage.align     = StageAlign.TOP_LEFT;

			cv  = new BitmapData(465, 465, true, 0x000000);
			addChild(new Bitmap(cv));

			SpR  = new Sprite();
			addChild(SpR);

			addEventListener(Event.ENTER_FRAME, makeAll);
			Sp        = SPPiece(iP1, iP2);
		}

		private function makeAll(e:Event):void
		{
			Sp        = SPPiece(iP1, iP2);
			SpR.addChild(Sp);
			arySp.push(Sp);
			Sp.name   = "p"+arySp.length;
			Sp.scaleX = Math.round(Math.random()*1500)/100;
			Sp.scaleY = Sp.scaleX;
			Sp.alpha  = 0.6;
			Sp.x      = Math.round(Math.random()*stage.stageWidth);
			Sp.y      = stage.stageHeight + 50;

			moveAll();

            cv.draw(SpR, null, null, BlendMode.OVERLAY);
            cv.applyFilter(cv, cv.rect, new Point(), new BlurFilter(16,16));
		}

		private function moveAll():void
		{
			var m:int;
			for(m=0; m<arySp.length; m++){
				var target:Bitmap = arySp[m];
				movePiece(target);
			}
		}

		private function movePiece(p:Bitmap):void
		{
			p.rotation+=5;
//			p.x += 4 * Math.cos(Math.PI/180*p.rotation) + (mouseX-stage.stageWidth/2)/20;
			p.x += (mouseX-stage.stageWidth/2)/20;
			p.y -= 2 + p.scaleX/2;
			if(p.x>=stage.stageWidth+p.width) p.x -= stage.stageWidth + 100;
			if(p.x<=0-p.width)                p.x += stage.stageWidth + 100;
			if(p.y<=-(p.height+80)*p.scaleX){
				var iP:uint = int(p.name.substr(1));
				SpR.removeChildAt(iP);
				arySp.splice(iP,1);
			}
		}

		public function SPPiece(n1:uint, n2:uint):Bitmap
		{
			var tBD:BitmapData    = new BitmapData(n1*2, n1*2, true, 0);

			var iC:int = retC(100);
			for(var i:int=0; i<n1*2; i++){
				for(var k:int=0; k<n1*2; k++){
					if( (i<n2 && k<n2) || (i<n2 && k>=n1*2-n2) || (i>=n1*2-n2 && k<n2) || (i>=n1*2-n2 && k>=n1*2-n2)){
//tBD.setPixel(i, k, 0x000000);
					}else tBD.setPixel32(i, k, iC);
				}
			}
			var _mat:Matrix = new Matrix();

			tBD.draw(tBD, _mat);
			return new Bitmap(tBD);
		}
		// ランダムカラーをreturn
		private function retC(n:uint):int
		{
			var ofR:int = n+Math.round(Math.random()*(255-n));
			var ofG:int = n+Math.round(Math.random()*(255-n));
			var ofB:int = n+Math.round(Math.random()*(255-n));
			return parseInt("0xff"+ ofR.toString(16)+ ofG.toString(16) + ofB.toString(16));
		}
	}
}