code on 2009-1-13

by mtok 14 Jan 2009

• Related works: 1
Embed

package  
{
	import flash.display.Bitmap;
	import flash.display.BitmapData;
	import flash.display.MovieClip;
	import flash.display.BlendMode;
	import flash.filters.BlurFilter;
	
	import flash.events.Event;
	import flash.geom.Matrix;
	import flash.geom.Rectangle;
	[SWF(width=465, height=465, backgroundColor=0x404080, frameRate=30)]	

	public class Spiral extends MovieClip
	{
		private var bmp:Bitmap;
		private var i:int;
		private var trans:Matrix;
		public function Spiral() 
		{
			var c:Number = Math.cos( Math.PI / 35);
			var s:Number = Math.cos( Math.PI / 35);
			
			//trans = new Matrix(c, s, -s, c, 0, 0 );
			trans = new Matrix(
			0.9751040819724653, 0.0978367483138916,
			-0.0978367483138916, 0.9751040819724653,
			12.27326663414263, -7.294083028635697);
			addEventListener(Event.ADDED_TO_STAGE, addedToStage);
		}
		
		private function addedToStage(e:Event):void 
		{
			removeEventListener(e.type, arguments.callee);
			
			bmp = new Bitmap(new BitmapData(stage.stageWidth, stage.stageHeight, false, 0));
			addChild(bmp);
			addEventListener(Event.ENTER_FRAME, enterFrameHandler);
		}
		
		private function enterFrameHandler(e:Event):void 
		{
			bmp.bitmapData.fillRect(
				new Rectangle(
					220 * Math.sin(i / 70) + 220,
					220 * Math.cos(i / 50) + 220,
					5, 5),
				  (int(Math.sin(i / 87) 				   * 128) << 16)
				+ (int(Math.sin(i / 100 + Math.PI * 2 / 3) * 128) << 8)
				+ (int(Math.sin(i / 130 + Math.PI * 4 / 3) * 128)) + 0x808080);
			bmp.bitmapData.draw(bmp.bitmapData, 
			trans, null, BlendMode.LIGHTEN, null, true);
			bmp.bitmapData.applyFilter(bmp.bitmapData, bmp.bitmapData.rect, bmp.bitmapData.rect.topLeft, new BlurFilter(2,2));
			i++;
		}
		
	}
	
}