// 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()); } } }