falling snow

by shin-go 27 Nov 2010

• Forked from shin-go's forked from: webCam
• Diff: 92
• Related works: 2
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/**
 * Copyright shin-go ( http://wonderfl.net/user/shin-go )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/kZtV
 */

// forked from shin-go's forked from: webCam
// forked from shin-go's webCam
package {
  import flash.display.Bitmap;
  import flash.display.BitmapData;
  import flash.display.Sprite;
  import flash.events.ActivityEvent;
  import flash.events.ContextMenuEvent;
  import flash.events.Event;
  import flash.filters.ConvolutionFilter;
  import flash.geom.Point;
  import flash.media.Camera;
  import flash.media.Video;
  import flash.text.TextField;
  import net.hires.debug.Stats;
  public class FlashTest extends Sprite {
      protected var video:Video;
	  protected var bmpd:BitmapData;
	  protected var convolitionFilter:ConvolutionFilter;
      public function FlashTest() {
          // write as3 code here..
          setCamera()
          //addChild(new Stats());
      }
      protected function setCamera():void{
          
          var camera:Camera = Camera.getCamera();
          if (camera != null) {
              video = new Video(stage.stageWidth,stage.stageWidth*3/4);
              video.attachCamera(camera);
              camera.addEventListener(ActivityEvent.ACTIVITY, onActivity);
	      camera.addEventListener(Event.DEACTIVATE, onDeactivate);
              addChild(video);
          }else {
              var txt:TextField = addChild(new TextField()) as TextField;
              txt.text = "No Camera!";
          }
      }
      
      protected function onActivity(e:ActivityEvent):void {
          if (e.activating == true) {
              setFilter();
	      setBall();
          }else{
              var txt:TextField = addChild(new TextField()) as TextField;
              txt.text = "No Camera!";
          }
      }
	  protected function onDeactivate(e:Event):void {
			var txt:TextField = addChild(new TextField()) as TextField;
			txt.text = "No Camera!";
	  }
      
      protected function setFilter():void {
		  if (!bmpd) bmpd = new BitmapData(video.width, video.height, false, 0x000000);
		  var bmp:Bitmap = addChild(new Bitmap(bmpd)) as Bitmap;
		  bmp.width = bmpd.width / 3;
		  bmp.height = bmpd.height / 3;
		  bmp.x = stage.stageWidth - bmp.width;
		  bmpd.draw(video);
		  var edges:Array = [0, -1, 0,
								-1, 4, -1,
								0, -1, 0];

		  convolitionFilter = new ConvolutionFilter(3, 3, edges, 1);
		  bmp.filters = [convolitionFilter];
		  
		  addEventListener(Event.ENTER_FRAME, onEnter);
		  function onEnter(e:Event):void {
			  bmpd.draw(video);
		  }
	  }
	  protected function setBall():void {
		  
		  addEventListener(Event.ENTER_FRAME, onEnter);
		  function onEnter(e:Event):void {
			 // if(Math.random()>0.6){
				var ball:Ball = Ball.GET_INSTANCE(Math.random() * stage.stageWidth, 0);
				if (ball) addChild(ball); 
			 // }
		  }
	  }
		  
   
  }
}

import flash.display.Sprite;
import flash.events.Event;

class Ball extends Sprite {
	protected static var LIST:Array = [];
	protected static var REMOVED_LIST:Array = [];
	protected static const INSTANS_LIMIT:int = 100;
	protected static const G:Number = 0.2;
	protected var a:Number = 0;
	protected static const FLICTION:Number = 0.2;
	protected var v:Number = 0;
	protected static var txt:flash.text.TextField;
	public function Ball() {
		graphics.beginFill(0xffffff, 1);
		graphics.drawCircle(0, 0, 3+2*Math.random());
		graphics.endFill();
		a = G * width;
	}
	public static function GET_INSTANCE(_x:Number,_y:Number):Ball {
		var instance:Ball;
		if (LIST.length < INSTANS_LIMIT) {
			if (REMOVED_LIST.length > 0) {
				instance = REMOVED_LIST.pop();
				LIST.push(instance);
			}else {
				instance = new Ball();
				LIST.push(instance);
			}
			instance.x = _x;
			instance.y = _y;
			instance.startFall();
		}else {
			instance = null;
		}
		return instance;
	}
	protected static function REMOVE_INSTANCE(instance:Ball):void {
		for (var i:int = 0; i < LIST.length; i++) {
			if (Ball(LIST[i]) == instance) {
				LIST.splice(i, 1);
				REMOVED_LIST.push(instance);
			}
		}
	}
	public function startFall():void {
		addEventListener(Event.ENTER_FRAME, onEnter);
	}
	public function stopFall():void {
		removeEventListener(Event.ENTER_FRAME, onEnter);
	}
	protected function onEnter(e:Event):void {
		v += a - v * FLICTION;
		y += v;
		if (y > stage.stageHeight) {
			stopFall();
			REMOVE_INSTANCE(this);
		}
	}
	
}