Ported from http://actionsnippet.com/?p=2820

by og2t 16 Mar 2010

• Related works: 1

Tags

bitmap webcam
Embed

/**
 * Copyright og2t ( http://wonderfl.net/user/og2t )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/im6c
 */

package
{
	import flash.display.Bitmap;
	import flash.display.BitmapData;
	import flash.display.BlendMode;
	import flash.display.Sprite;
	import flash.display.MovieClip;
	import flash.events.ActivityEvent;
	import flash.events.Event;
	import flash.geom.Point;
	import flash.geom.Rectangle;
	import flash.media.Camera;
	import flash.media.Video;

	public class FrameDiff extends Sprite
	{
		private var cam:Camera = Camera.getCamera();
		private var sw:Number = 465;
		private var sh:Number = 465;
		private var pnt:Point = new Point(0,0);
		private var rect:Rectangle = new Rectangle(0,0,sw,sh);
		private var video:Video = new Video(sw, sh);

		private var canvas:BitmapData = new BitmapData(sw, sh, false, 0x000000);
		private var buffer:BitmapData = new BitmapData(sw, sh, false, 0x000000);
		private var feed  :BitmapData = new BitmapData(sw, sh, false, 0x000000);
		private var prev  :BitmapData = new BitmapData(sw, sh, false, 0x000000);

		private var frame:Bitmap = new Bitmap(canvas, "auto", true);

		public function FrameDiff() 
		{
			addChild(frame);

			cam.setMode(sw, sh, 12);
			video.attachCamera(cam);

			cam.addEventListener(ActivityEvent.ACTIVITY, onActivityStart);
		}

		private function onActivityStart(evt:ActivityEvent):void
		{
			addEventListener(Event.ENTER_FRAME, onRun);
			cam.removeEventListener(ActivityEvent.ACTIVITY, onActivityStart);
		}

		private function onRun(evt:Event):void
		{
			buffer.draw(video);
			feed.copyPixels(buffer, rect, pnt);
			buffer.draw(prev, null, null, BlendMode.DIFFERENCE);
			prev.draw(video);
			canvas.copyPixels(buffer, rect, pnt);
		}
	}
}