Rybczyński Effect

forked:4
favorite:37
lines:51
license : MIT License
modified : 2009-01-17 17:41:17

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// write as3 code here..
package {
	
	import flash.display.Bitmap;
	import flash.display.BitmapData;
	import flash.display.PixelSnapping;
	import flash.display.Sprite;
	import flash.events.Event;
	import flash.geom.Point;
	import flash.geom.Rectangle;
	import flash.media.Camera;
	import flash.media.Video;
	
	import net.hires.debug.Stats;
	
	[SWF(frameRate=60)]
	
	public class Hoge extends Sprite {
		
		private static const NUM_STRIP:int = 120;
		
		private var _camera:Camera;
		private var _video:Video;
		private var _images:Array = [];
		private var _canvas:BitmapData;
		private var _index:int = 0;
		
		public function Hoge() {
			this._camera = Camera.getCamera();
			if (!this._camera) {
				throw new Error('No Camera!');
			}
			this._camera.setMode(320, 240, 30);
			this._video = new Video(320, 240);
			this._video.attachCamera(this._camera);
			this._canvas = new BitmapData(320, 240, false, 0x0);
			var bm:Bitmap = this.addChild(new Bitmap(this._canvas, PixelSnapping.AUTO, true)) as Bitmap;
			bm.scaleX = bm.scaleY = 465 / 240;
			bm.x = -(bm.width - 465) / 2;
			
			for (var i:int = 0; i < NUM_STRIP; i++) {
				this._images.push(new BitmapData(320, 240, false, 0x0));
			}
			
			this.addEventListener(Event.ENTER_FRAME, this._update);
			
//			this.addChild(new Stats());
		}
		
		private function _update(e:Event):void {
			var b:BitmapData = this._images[this._index];
			b.draw(this._video);
			
			var rect:Rectangle = new Rectangle(0, 0, 320, 240 / NUM_STRIP);
			var pt:Point = new Point();
			for (var i:int = 0; i < NUM_STRIP; i++) {
				pt.y = rect.y = i / NUM_STRIP * 240;
				this._canvas.copyPixels(this._images[(this._index + i) % NUM_STRIP], rect, pt);
			}
			
			if (++this._index == NUM_STRIP) {
				this._index = 0;
			}
		}
	}
}

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