package 
  {
          import mx.controls.Image;
          import flash.utils.Timer;
          import flash.events.TimerEvent;
          
          public class @ax-graphic-flex-animation-bubbles-BallTest
          {
                  function @ax-graphic-flex-animation-bubbles-BallTest(root_ball : Image, N : Number) {
                          this._root_ball = root_ball;
                          this._N = N; // number of objects
                          this._ballsO = new Array();
                          this._isRunning = false;
                  }
                  protected var _N : Number;
                  protected var _ballsO : Array;
                  protected var _isRunning : Boolean;
                  protected var _root_ball : Image;
                  protected var _F : Number = 0;
                  protected var _lastF : Number = 0;
                  protected var _lastTime : Date;
                  
                  private var _frameTimer : Timer;
                  private var _fpsTimer : Timer;
                  
                  public var _showFPS : Function = null;
                  
                  public function startN(N : Number) : void {
                          this._N = N;
                          this.start();
                  }
                  
                  public function start() : void {
                          if (this._isRunning) return;
                          this._isRunning = true;
                          
                          this._F = 0;  // frames counter for FPS
                          this._lastF = 0;
                          this._lastTime = new Date();
  
                          var _this : @ax-graphic-flex-animation-bubbles-BallTest = this;
                          
                          var moveBalls : Function = function() : void {
                                  if (_this._N > _this._ballsO.length) 
                                          return;
                                  _this._F++;
                                  // move balls
                                  for (var i : Number = 0; i<_this._N; i++) {
                                          _this._ballsO[i].move();
                                  }
                                  // process collisions
                                  for (i=0; i<_this._N; i++) {
                                          for (var j : Number = i+1; j<_this._N; j++) {
                                                  _this._ballsO[i].doCollide(_this._ballsO[j]);
                                          }
                                  }
                          }
                          var showFps : Function = function() : void {
                                  if (_this._F - _this._lastF < 10) return;
                                  var currTime : Date = new Date();
                                  var delta_t : Number = (currTime.getMinutes() - _this._lastTime.getMinutes())*60 + currTime.getSeconds() - _this._lastTime.getSeconds() + (currTime.getMilliseconds() - _this._lastTime.getMilliseconds())/1000.0;
                                   
                                  var fps : Number = (_this._F - _this._lastF)/delta_t;
                                  
                                  _this._lastF = _this._F;
                                  _this._lastTime = currTime;
                                  
                                  if (_this._showFPS != null) 
                                          _this._showFPS.call(_this, Math.round(fps));
                          }
                          // create all our balls
                          this._ballsO[0] = new Ball(this._root_ball);
                                  
                          for (var i : Number =1; i<this._N; i++) {
                                  this._ballsO[i] = this._ballsO[0].clone();
                          }
                          
                          this._frameTimer = new Timer(5);
                          this._frameTimer.addEventListener(TimerEvent.TIMER, moveBalls);
                          
                          this._fpsTimer = new Timer(3000);
                          this._fpsTimer.addEventListener(TimerEvent.TIMER, showFps);
                          
                          this._frameTimer.start();
                          this._fpsTimer.start();
                          
                          //this._int1 = setInterval(moveBalls, 5);
                          //this._int2 = setInterval(showFps, 3000);
                  }
                  
                  public function stop() : Boolean{
                          if (!this._isRunning) return false;
                          this._isRunning = false;
                          this._frameTimer.stop();
                          this._fpsTimer.stop();
                          
                          for (var i : Number=1; i<this._N; i++) {
                                  this._ballsO[i].remove();
                                  delete this._ballsO[i];
                          }
                          delete this._ballsO[0];
                          //clearInterval(this._int1);
                          //clearInterval(this._int2);
                          return true;
                  }
          }
  }