/* -----------------------------------------------------------------------------
	GSFramework
	Copyright 2001-2013 Emmanuel Julien. All Rights Reserved.
----------------------------------------------------------------------------- */


#ifndef	__NCLOCK__
#define	__NCLOCK__


		#include "memory/nshared_ptr.h"
		#include "container/smart_median_average.h"


namespace GS {
	namespace Core {

/*!
	@short	Clock
	@author	Emmanuel Julien (ejulien@nworks.fr)
*/
class	Clock : public SharedObject
{
		bool			pause;
		int				fixed_delta;		///< Fixed dt (ms).

		int				_gtick, gtick;		///< System's global tick counter.
		int				clock_scale;		///< System clock scale factor (x1000).

		int				dt_clock;			///< Delta frame.
		int				dt_error;

		SmartMedianAverage <int> dt_clock_filter;

public:

		void			Reset();
		void			Update();

		void			Pause(bool = true);

		/// Sync to current hardware clock (skipping unaccounted dt_clock).
		void			EatDeltaClock();

		float			Getf() const;
		float			GetDeltaf() const;

		void			SetScalef(float = 1.f);
		float			GetScalef() const;

		/// Set fixed delta clock in seconds.
		void			SetFixedDeltaFramef(float = -1.0);

		int				GetDelta() const { return dt_clock; }

		void			SetScale(int k = 1000) { clock_scale = k; }
		int				GetScale() const { return clock_scale; }

		int				Get() const { return gtick; }

		Clock();
};

typedef	SharedPtr <Clock> sClock;

	} // Core
} // GS


#endif	// __NCLOCK__