Forked from:: miyaoka's Coins

forked from: Coins

forked:6
favorite:28
lines:184
license : MIT License
modified : 2009-08-20 18:36:16

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// forked from miyaoka's Coins
package  {
	import flash.display.*;
	import flash.events.*;
	import flash.filters.*;
	import flash.geom.*;
	import flash.media.Sound;
	import flash.net.*;
	import flash.system.LoaderContext;
	import caurina.transitions.Tweener;
	import flash.utils.Timer;
	import net.hires.debug.Stats;
	
	import Box2D.Collision.*;
	import Box2D.Collision.Shapes.*;
	import Box2D.Common.Math.*;
	import Box2D.Dynamics.*;
	
	[SWF(width="465", height="465", backgroundColor="0xFFFFFF", frameRate="60")]     
	public class Box2D_Study extends Sprite {
		private var imgs:Array = [];
		private var urls:Array = 
[
"http://farm3.static.flickr.com/2608/3839475460_66c5e7637e_o.png",
"http://farm4.static.flickr.com/3467/3839485958_a7572aeb61_o.png",
"http://farm3.static.flickr.com/2440/3838696725_a921833d70_o.png",
"http://farm3.static.flickr.com/2650/3839496010_96de330537_o.png",
"http://farm3.static.flickr.com/2444/3839495982_12d0e4ecc8_o.png",
"http://farm3.static.flickr.com/2608/3839475460_66c5e7637e_o.png",
"http://farm3.static.flickr.com/2608/3839475460_66c5e7637e_o.png",
"http://farm4.static.flickr.com/3467/3839485958_a7572aeb61_o.png",
"http://farm3.static.flickr.com/2440/3838696725_a921833d70_o.png",
"http://farm3.static.flickr.com/2650/3839496010_96de330537_o.png",
"http://farm3.static.flickr.com/2444/3839495982_12d0e4ecc8_o.png",
"http://farm3.static.flickr.com/2608/3839475460_66c5e7637e_o.png"
];

private var radiuses:Array = [
			//10, 11, 11.75, 10.5, 11.3, 13.25
                15, 16, 13.75, 12.5, 15.3, 15.25
		];
		private var densities:Array = [
			2.066947313, 6.488961867, 7.980747225, 7.699105335, 7.038588188, 6.345800508
		];
		private var coinsThreshold:int = 10;
		private var coins:Array = [];
		
		private var sndCoin:Sound = new Sound(new URLRequest(
			"http://www.t-p.jp/wonderfl/sound/coin1.mp3"));
		private var sndFall:Sound = new Sound(new URLRequest(
			"http://www.t-p.jp/wonderfl/sound/coin6.mp3"));		
		
		
		private static const DRAW_SCALE:Number = 100;
		private var world:b2World;
		
		public function Box2D_Study() {
			//load imgs
			var loaded:uint = 0;
			for (var i:int = 0; i < urls.length; i++)
			{
				var loader:Loader = new Loader();
				loader.name = i.toString();
				loader.contentLoaderInfo.addEventListener(Event.COMPLETE, function (e:Event):void 
				{
					imgs[int(e.target.loader.name)] = e.target.loader.content as Bitmap;
					trace(loaded);
					if (++loaded == urls.length) init();
				});
				loader.load(new URLRequest(urls[i]), new LoaderContext(true));
			}
		}
		
		private function init():void 
		{
			//world
			var worldAABB:b2AABB = new b2AABB();
			worldAABB.lowerBound.Set(-100, -100);
			worldAABB.upperBound.Set(100, 100);
			var gravity:b2Vec2 = new b2Vec2(0, 10);
			world = new b2World(worldAABB, gravity, true);
			
			//wall
			makeWall();
			
			//debug
//			debugDraw();		
//			addChild(new Stats());
			
			//evts
			addEventListener(Event.ENTER_FRAME, enterFrameHandler);

var timer:Timer = new Timer(50);
			stage.addEventListener(MouseEvent.MOUSE_DOWN, function ():void 
			{
				addCoin();
				timer.reset();
				timer.start();
				stage.addEventListener(MouseEvent.MOUSE_UP, function ():void 
				{
					timer.stop();
				});
			});
			timer.addEventListener(TimerEvent.TIMER, function ():void 
			{
				sndCoin.play();
				addCoin();
			});
		}
		private function addCoin():void 
		{
			var i:int = Math.floor(Math.random() * radiuses.length);
			addCircle(
				mouseX, mouseY, 
				//radiuses[i] * 4, 
radiuses[i] * 3, 
				densities[i], 
				imgs[Math.random() < 0.5 ? i * 2 : i * 2 + 1] as Bitmap );
		}
		private function debugDraw():void 
		{
			var debugDraw:b2DebugDraw = new b2DebugDraw();
			debugDraw.m_sprite = this;
			debugDraw.m_drawScale = DRAW_SCALE;
			debugDraw.m_fillAlpha = 0.3;
			debugDraw.m_lineThickness = 1;
			debugDraw.m_drawFlags = b2DebugDraw.e_shapeBit | b2DebugDraw.e_jointBit;
			world.SetDebugDraw(debugDraw);
		}
		private function makeWall():void {
			
			var bd:b2BodyDef = new b2BodyDef();
			bd.position.Set(0, 0);
			
			var wall:b2Body = world.CreateBody(bd);
			
			var w:Number = stage.stageWidth / DRAW_SCALE;
			var h:Number = stage.stageHeight / DRAW_SCALE;
			var wallSize:Number = 50 / DRAW_SCALE;
			
			var sd:b2PolygonDef = new b2PolygonDef();
			sd.filter.categoryBits = parseInt("010",2);
			
			//top
			sd.SetAsOrientedBox(w / 2 + wallSize * 2, wallSize, new b2Vec2(w / 2, -wallSize - h/2));
			wall.CreateShape(sd);
			//bottom
			sd.SetAsOrientedBox(w / 2 + wallSize * 2, wallSize, new b2Vec2(w / 2,  h + wallSize));
			wall.CreateShape(sd);
			//left
			sd.SetAsOrientedBox(wallSize, h, new b2Vec2(-wallSize, h / 2));
			wall.CreateShape(sd);
			//right
			sd.SetAsOrientedBox(wallSize, h, new b2Vec2(w + wallSize,  h / 2));
			wall.CreateShape(sd);

}
		
		
		private function enterFrameHandler(event:Event):void {
			for (var b:b2Body = world.GetBodyList(); b; b = b.GetNext()) {
				if (b.GetUserData() is Sprite) {
					if (b.GetWorldCenter().y *DRAW_SCALE > 500)
					{
						removeChild(b.GetUserData());
						world.DestroyBody(b);
					}
					else
					{
						b.GetUserData().x = b.GetWorldCenter().x * DRAW_SCALE;
						b.GetUserData().y = b.GetWorldCenter().y * DRAW_SCALE;
						b.GetUserData().rotation = b.GetAngle() * 180 / Math.PI;
					}
				}
			}
			if (coinsThreshold < coins.length)
			{
				sndFall.play();
				var coinsLeft:int = coinsThreshold * Math.random() * 0.5;
				coinsThreshold = Math.random() * 10 + 20;
				while(coinsLeft < coins.length)
				{
					var b1:b2Body = coins.shift() as b2Body;
					var sp:b2Shape = b1.GetShapeList();
					var f:b2FilterData = new b2FilterData();
					
					f.maskBits = parseInt("001",2);
					sp.SetFilterData(f);
					world.Refilter(sp);
				}
			}
		
			world.Step(1 / stage.frameRate, 10);
		}
		
		private function addCircle(posX:Number , posY:Number, radius:Number, density:Number, bmpSource:Bitmap):void 
		{
			//body def
			var bd:b2BodyDef = new b2BodyDef();
			bd.position.Set(posX / DRAW_SCALE, posY / DRAW_SCALE);
			
			//shape def
			var sd:b2CircleDef = new b2CircleDef();
			sd.radius = radius / DRAW_SCALE;
			sd.density = density;
			sd.restitution = 0.5;
			
			var bmp:Bitmap = new Bitmap(bmpSource.bitmapData.clone());
			bmp.smoothing = true;
			//img
			bmp.width = 
			bmp.height = radius * 2;
			bmp.x = 
			bmp.y = -radius;
			
			//body
			var body:b2Body = world.CreateBody(bd);
			body.CreateShape(sd);
			body.SetMassFromShapes();
			
			body.m_userData = new Sprite();
			body.GetUserData().x = body.GetWorldCenter().x * DRAW_SCALE;
			body.GetUserData().y = body.GetWorldCenter().y * DRAW_SCALE;
			body.GetUserData().addChild(bmp);
			
			coins.push(body);
			addChild(body.GetUserData());
		}
	}
}

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