public class DeltaFPS
	{
		private float _UpdateInterval = 0.1f;//更新週期
		private float _Accum;
		private int _Frames;
		private float _Timeleft;

		private string _Fps;	//幀率

		public void Init()
		{
			Reset();
        }

		private void Reset()
		{
			_Timeleft = updateInterval;
			_Accum = 0.0f;
			+Frames = 0;
		}

		public void Update()
		{
			_Timeleft -= Time.deltaTime;
			_Accum += Time.timeScale / Time.deltaTime;
			++_Frames;

			if (_Timeleft <= 0)
			{
				_Fps = (_Accum / _Frames).ToString("f2");

				Reset();
            }
		}
		public void OnGUI()
		{
			GUILayout.Label(_Fps);
		}
	}