/*******************************************************************************

 Header:       FGFDMExec.h
 Author:       Jon Berndt
 Date started: 11/17/98

 ------------- Copyright (C) 1999  Jon S. Berndt (jsb@hal-pc.org) -------------

 This program 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 2 of the License, or (at your option) any later
 version.

 This program 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
 this program; if not, write to the Free Software Foundation, Inc., 59 Temple
 Place - Suite 330, Boston, MA  02111-1307, USA.

 Further information about the GNU General Public License can also be found on
 the world wide web at http://www.gnu.org.

HISTORY
--------------------------------------------------------------------------------
11/17/98   JSB   Created
7/31/99     TP   Added RunIC function that runs the sim so that every frame
                 begins with the IC values from the given FGInitialCondition 
				 object and dt=0. 

********************************************************************************
SENTRY
*******************************************************************************/

#ifndef FGFDMEXEC_HEADER_H
#define FGFDMEXEC_HEADER_H

/*******************************************************************************
INCLUDES
*******************************************************************************/

#include "FGModel.h"
#include "FGInitialCondition.h"

using namespace std;

/*******************************************************************************
CLASS DECLARATION
*******************************************************************************/

class FGState;
class FGAtmosphere;
class FGFCS;
class FGAircraft;
class FGTranslation;
class FGRotation;
class FGPosition;
class FGAuxiliary;
class FGOutput;
class FGInitialCondition;

class FGFDMExec
{
public:
  FGFDMExec::FGFDMExec(void);
  FGFDMExec::~FGFDMExec(void);

  FGModel* FirstModel;

  bool Initialize(void);
  int  Schedule(FGModel* model, int rate);
  bool Run(void);
  bool RunIC(FGInitialCondition *fgic); 
  void Freeze(void) {frozen = true;}
  void Resume(void) {frozen = false;}

  inline FGState* GetState(void)             {return State;}
  inline FGAtmosphere* GetAtmosphere(void)   {return Atmosphere;}
  inline FGFCS* GetFCS(void)                 {return FCS;}
  inline FGAircraft* GetAircraft(void)       {return Aircraft;}
  inline FGTranslation* GetTranslation(void) {return Translation;}
  inline FGRotation* GetRotation(void)       {return Rotation;}
  inline FGPosition* GetPosition(void)       {return Position;}
  inline FGAuxiliary* GetAuxiliary(void)     {return Auxiliary;}
  inline FGOutput* GetOutput(void)           {return Output;}

private:
  bool frozen;
  bool terminate;
  int Error;

  FGState*       State;
  FGAtmosphere*  Atmosphere;
  FGFCS*         FCS;
  FGAircraft*    Aircraft;
  FGTranslation* Translation;
  FGRotation*    Rotation;
  FGPosition*    Position;
  FGAuxiliary*   Auxiliary;
  FGOutput*      Output;

protected:
};

/******************************************************************************/
#endif