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Coins
miyaoka 2009年11月18日 MIT License
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      package  {
    import flash.display.*;
    import flash.events.*;
    import flash.filters.*;
    import flash.geom.*;
    import flash.media.Sound;
    import flash.media.SoundTransform;
    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.*;
    
    import com.bit101.components.*;
    
    [SWF(width="465", height="465", backgroundColor="0xFFFFFF", frameRate="60")]     
    public class Coins extends Sprite {
        private var imgs:Array = [];
        private var radiuses:Array = [
            10, 11, 11.75, 10.5, 11.3, 13.25
        ];
        private var densities:Array = [
            2.066947313, 6.488961867, 7.980747225, 7.699105335, 7.038588188, 6.345800508
        ];
        private var coinsThreshold:int = 20;
        private var coins:Array = [];
        
        private var sndCoin:Sound = new Sound(new URLRequest(
            "http://www.t-p.jp/wonderfl/sound/coin10.mp3"));
        private var sndFall:Sound = new Sound(new URLRequest(
            "http://www.t-p.jp/wonderfl/sound/coin7.mp3"));        
        private var st:SoundTransform = new SoundTransform(0.5);
        
        private static const DRAW_SCALE:Number = 100;
        private var world:b2World;
        
        public function Coins() {
            
            var g:Graphics = graphics;
            g.beginFill(0xdddddd);
            g.drawRect(0, 0, stage.stageWidth, stage.stageHeight);
            
            var urls:Array = 
[
"http://farm4.static.flickr.com/3510/3839291754_e052151b03_o.png",
"http://farm3.static.flickr.com/2431/3838502983_51a53798f8_o.png",
"http://farm4.static.flickr.com/3552/3838503031_68c19321d6_o.png",
"http://farm4.static.flickr.com/3497/3839291934_d68967a908_o.png",
"http://farm4.static.flickr.com/3104/3838503121_15d1263b89_o.png",
"http://farm3.static.flickr.com/2466/3839292046_cb9cacd41b_o.png",
"http://farm3.static.flickr.com/2538/3838503213_ed8af9fbd0_o.png",
"http://farm3.static.flickr.com/2608/3838503261_9fca2704ca_o.png",
"http://farm3.static.flickr.com/2493/3839292186_67b9c39a3a_o.png",
"http://farm4.static.flickr.com/3548/3838503371_bc956d6fbd_o.png",
"http://farm4.static.flickr.com/3507/3838503419_9de5074c7f_o.png",
"http://farm4.static.flickr.com/3577/3838503481_9b67b42bed_o.png"
];

            var pb:ProgressBar = new ProgressBar(this, stage.stageWidth / 2 - 100, stage.stageHeight / 2);
            pb.width = 200;
            pb.maximum = urls.length;
            pb.value = 0;
            var lb:Label = new Label(this, pb.x, pb.y - 20, "loading...");
            var date:String = new Date().valueOf().toString();
                
            for (var i:int = 0; i < pb.maximum; 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;
                    pb.value++;
                    lb.text = pb.value.toString() + " / " + pb.maximum.toString();
                    if (pb.value == pb.maximum)
                    {
                        removeChild(pb);
                        pb = null;
                        removeChild(lb);
                        lb = null;
                        g.clear();
                        init();
                    }
                });
                loader.load(new URLRequest(urls[i] + "?" + date), 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(100);
            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 
            {
                addCoin();
            });
        }
        private function addCoin():void 
        {
                sndCoin.play(0,0,st);
            var i:int = Math.floor(Math.random() * radiuses.length);
            addCircle(
                mouseX, mouseY, 
                radiuses[i] * 4, 
                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();
            var num:Number = Math.random() - 0.5;
            body.SetAngularVelocity(num * Math.PI*2 * 10);
            body.SetLinearVelocity(new b2Vec2(num * 10, -Math.random() * 2 - 5));
            
            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());
        }
    }
}