flash on 2010-12-7

/**
 * Copyright yama3 ( http://wonderfl.net/user/yama3 )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/y9Ou
 */

package {
    import Box2D.Common.Math.b2Vec2;
    import Box2D.Dynamics.b2ContactFilter;
    import com.actionsnippet.qbox.QuickBox2D;
    import com.actionsnippet.qbox.QuickContacts;
    import com.actionsnippet.qbox.QuickObject;
    import flash.display.Graphics;
    import flash.display.MovieClip;
    import flash.display.Sprite;
    import flash.events.Event;
    import flash.events.KeyboardEvent;
    import flash.ui.Keyboard;
    
    [SWF(backgroundColor="0xFFFFFF", width=465, height=465, frameRate=60)]
    
    public class FlashTest extends Sprite {
        private var _qbox:QuickBox2D;
        private var _key:Object;
        private var _actor:QuickObject;
        private var _canvas:MovieClip;
        private var _circles:Vector.<QuickObject>;
        private var _chains:Vector.<QuickObject>;
        private var _boxes:Vector.<QuickObject>;
        private var _contacts:QuickContacts;
        
        public function FlashTest() {
            _init();            
        }
        
        private function _init():void
        {
            _key = {};
            _circles = new Vector.<QuickObject>;
            _chains = new Vector.<QuickObject>;
            _boxes = new Vector.<QuickObject>;
            
            var g:Graphics = graphics;
            g.beginFill(0x222222);
            g.drawRect(0, 0, stage.stageWidth, stage.stageHeight);
            
            _canvas = new MovieClip();
            addChild(_canvas);
            
            _qbox = new QuickBox2D(_canvas);
            _qbox.mouseDrag();
            _qbox.start();
            _qbox.setDefault({lineAlpha:0});
            _createWalls();
            
            _contacts = _qbox.addContactListener();
            _contacts.addEventListener(QuickContacts.ADD, _onAdd);
            
            for(var i:int=0; i<20; i++)
            {
                _boxes.push(_qbox.addBox({x:Math.random()*100, y:Math.random()*14+1, width:2+Math.random()*3,height:0.5, density:0}));
               
            }
            for(i=0; i<20; i++)
            {
                _circles.push(_qbox.addCircle({x:Math.random()*100, y:Math.random()*15.5, radius:0.2+Math.random()/2,fillColor:0xeeeeee}));
                
            }
            
            _actor = _qbox.addBox({y:-0.2, width:30/30, height:30/30, alloqSleep:false, fillColor:0x0099cc});
            _qbox.setDefault({lineAlpha:1, lineColor:0xfffffff});
            
            stage.addEventListener(KeyboardEvent.KEY_DOWN, _onKeyDown);
            stage.addEventListener(KeyboardEvent.KEY_UP, _onKeyUp);
            addEventListener(Event.ENTER_FRAME, _onLoop);
        }
        
        private function _onAdd(e:Event):void
        {
            var l:Number = _circles.length;
            for(var i:int=0; i<l; i++)
            {
                var circ:QuickObject = _circles[i];
                if(!circ.params.isJoint && _contacts.isCurrentContact(circ, _actor)){
                    if(_chains.length == 0)
                    {
                        _qbox.addJoint({a:circ.body, b:_actor.body});
                    }
                    else {
                        _qbox.addJoint({a:circ.body, b:_chains[_chains.length-1].body});
                    }
                    _chains.push(circ);
                    circ.params.isJoint = true;
                }
            }
        }
        private function _onLoop(e:Event):void
        {
            var vel:b2Vec2 = _actor.body.GetLinearVelocity();
            var ang:Number = _actor.body.GetAngularVelocity();
            
            if(_key[Keyboard.LEFT])
            {
                vel.x -= 1;
                ang += 1;
            }
            else if(_key[Keyboard.RIGHT])
            {
                vel.x += 1;
                ang+=1;
            }
            
            if(_key[Keyboard.UP]){
                vel.y = -10;
                ang *= 0.8;
            }
            
            ang *= 0.9;
            vel.x *= 0.9;
            
            _actor.body.SetLinearVelocity(vel);
            _actor.body.SetAngularVelocity(ang);
            
            _canvas.x = -_actor.x * 30 + stage.stageWidth/2;
            if(_canvas.x > 15) _canvas.x = 15;
            if(_canvas.x < -2535) _canvas.x = -2535;
        }
        
        private function _createWalls():void
        {
            _qbox.addBox({x:50, y:stage.stageHeight/30, width:100, height:1, density:0});
            _qbox.addBox({x:-0.5, y:stage.stageHeight/30/2, width:1, height:stage.stageHeight/30, density:0});
            _qbox.addBox({x:100, y:stage.stageHeight/30/2, width:1, height:stage.stageHeight/30, density:0});
        }
        
        private function _onKeyDown(e:KeyboardEvent):void
        {
            _key[e.keyCode] = true;
        }
        
        private function _onKeyUp(e:KeyboardEvent):void
        {
            _key[e.keyCode] = false;
        }
    }
}