Framework: Fps

Fps

package elmortem.core {
        import flash.utils.getTimer;
        
        public class Fps {
                static private var last_time:int = 0;
                static private var last_fps_time:int = 0;
                // delta
                static public var delta:Number = 0;
                // fps
                static private var _fps:int = 0;
                static private var fps_num:int = 0;
                
                static public function start():void {
                        last_time = last_fps_time = getTimer();
                        delta = 0;
                        _fps = 0;
                        fps_num = 0;
                }
                static public function step():void {
                        // delta
                        delta = (getTimer() - last_time) / 1000;
                        
                        last_time = getTimer();
                        fps_num++;
                        if(last_time - last_fps_time >= 1000) {
                                _fps = fps_num;
                                fps_num = 0;
                                last_fps_time = last_time;
                        }
                }
                static public function get fps():int {
                        return _fps;
                }
        }
}

public class Gameplay extends State {
  private var ball:Ball;

  public function Gameplay(attrIn:Object = null) {
    super(attrIn);
  }
  override protected function init():void {
    addChild(ball = new Ball());
    addEventListener(Event.ENTER_FRAME, onFrame);
    Fps.start(); // начинаем считать
  }
  override public function free():void {
    removeChild(ball);
    ball = null;
  }
  private function onFrame(e:Event):void {
    Fps.step(); // считаем
    trace("fps: "+Fps.fps+", delta: "+Fps.delta);
    ball.x += 100 * Fps.delta; // скорость по x - 100 пикселей в секунду
    ball.y += 70 * Fps.delta; // скорость по y - 70 пикселей в секунду
  }
}