/*
===========================================================================

Doom 3 GPL Source Code
Copyright (C) 1999-2011 id Software LLC, a ZeniMax Media company. 

This file is part of the Doom 3 GPL Source Code (?Doom 3 Source Code?).  

Doom 3 Source Code is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

Doom 3 Source Code is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with Doom 3 Source Code.  If not, see <http://www.gnu.org/licenses/>.

In addition, the Doom 3 Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the Doom 3 Source Code.  If not, please request a copy in writing from id Software at the address below.

If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.

===========================================================================
*/

#ifndef __FORCE_H__
#define __FORCE_H__

/*
===============================================================================

	Force base class

	A force object applies a force to a physics object.

===============================================================================
*/

class idEntity;
class idPhysics;

class idForce : public idClass {

public:
	CLASS_PROTOTYPE( idForce );

						idForce( void );
	virtual				~idForce( void );
	static void			DeletePhysics( const idPhysics *phys );
	static void			ClearForceList( void );

public: // common force interface
						// evalulate the force up to the given time
	virtual void		Evaluate( int time );
						// removes any pointers to the physics object
	virtual void		RemovePhysics( const idPhysics *phys );

private:

	static idList<idForce*> forceList;
};

#endif /* !__FORCE_H__ */
