/*
   core/gameinterface.h
   This file is part of the Osirion project and is distributed under 
   the terms of the GNU General Public License version 2 
*/

#ifndef __INCLUDED_CORE_GAMEINTERFACE_H__
#define __INCLUDED_CORE_GAMEINTERFACE_H__

namespace core
{

/// abstract interface from the core to the game-specific code
/** The real game class has to derive from this class
 */
class GameInterface {
public:
	/// create a new game singleton
	GameInterface();
	/// destroy the game singleton
	virtual ~GameInterface();

	/// initialize the game
	virtual bool init() = 0;

	/// shutdown the game
	virtual void shutdown() = 0;

	/// run one frame of the game
	/** @param sec time since the previous frame, in seconds
	 */
	virtual void frame (float seconds) = 0;

	/// a pointer to the current game instance
	static GameInterface * instance();

	/// true if the game is ready and running
	bool connected;

	/// time the game has been running, in seconds
	float current_time;

private:
	static GameInterface *gameinterface_instance;
};

}

#endif // __INCLUDED_CORE_GAMEINTERFACE_H__