public void OnUpdateBeforeDraw()
 {
     Fps.Tick();
     PhysicsTimes.Add(_phyTimeAccu);
     _phyTimeAccu = 0.0f;
 }
 public void OnPhysicsUpdate(double physicClockMilliseconds, int numSteps, float processingTimeMilliseconds)
 {
     PhysicsTicks.Tick(numSteps);
     _phyTimeAccu += processingTimeMilliseconds;
 }