// forked from ton's マトリックスの世界へようこそ
//なんとなくマトリックスっぽいなにか
package {
    import flash.display.BitmapData;
    import flash.display.Sprite;
    import flash.events.Event;
    import flash.media.Camera;
    import flash.media.Video;
    import flash.text.TextField;
    import flash.text.TextFormat;

[SWF(backgroundColor=0x000000, frameRate=24)]
    public class MatrixCascade extends Sprite {
        private const W:int = 465;
        private const PW:int = W / 5;
        private const H:int = 465;
        private const PH:int = H / 8;
        
        private var video:Video = new Video(PW, PH);
        private var bmd:BitmapData = new BitmapData(PW, PH, false);
        private var lastFrame:Array = new Array(PW);
        private var charList:Array = [
        	"　","　",
        	"ノ","ノ","ノ",
        	"ニ","レ","ト","ソ","ン","リ",
        	"ミ","ウ","シ","ツ","キ","モ",
        	"ネ","オ","ヌ","タ","チ","テ"];
        private var numChars:int = charList.length;

private var tf:TextField = new TextField();
        private var tt:TextFormat = new TextFormat("Hiragino Kaku Gothic Pro W3, Shin Go, Heisei Kaku Gothic W5, Courier New, sans-serif", 8, 0xffffff);
        
        public function MatrixCascade():void {
            tf.width = tf.height = W;
            addChild(tf);
            
			for (var i:int = 0; i < lastFrame.length; i++){
				lastFrame[i] = new Array(PH);
			}
			
            video.attachCamera(Camera.getCamera());
            //addChild(video);
            addEventListener(Event.ENTER_FRAME, onEnterFrameHandler);
        }
        
        private function onEnterFrameHandler(e:Event):void {
            bmd.draw(video);
            var str:String = "";
            var h:int = bmd.height;
            var w:int = bmd.width;
            for (var i:int = 0; i < h; i++) {
                for (var j:int = 0; j < w; j++) {
//               	var pixel:String = charList[int((bmd.getPixel(j, i) / 0xffffff) * numChars)];
//					if (pixel == lastFrame[i][j]) {
//						str += pixel;
//					} else {
//						str += pixel;
//	                }
//                	lastFrame[i][j] = pixel;
					str += charList[int((bmd.getPixel(j, i) / 0xffffff) * numChars)];
                }
                str += "\n";
            }
            tf.text = str;
            tf.setTextFormat(tt);
        }
    }
}

カタカナcam