// JSBsim.hxx -- interface to the "JSBsim" flight model
//
// Written by Curtis Olson, started February 1999.
//
// Copyright (C) 1999  Curtis L. Olson  - curt@flightgear.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., 675 Mass Ave, Cambridge, MA 02139, USA.
//
// $Id$


#ifndef _JSBSIM_HXX
#define _JSBSIM_HXX

#include <FDM/JSBSim/FGFDMExec.h>
#include <FDM/JSBSim/FGInitialCondition.h>
#undef MAX_ENGINES

#include <Aircraft/aircraft.hxx>

#define ID_JSBSIMXX "$Header"

class FGJSBsim: public FGInterface {

    // The aircraft for this instance
    FGFDMExec *fdmex;
    FGInitialCondition *fgic;
    bool needTrim;
    
    bool trimmed;
    float trim_elev;
    float trim_throttle;

public:

    FGJSBsim::FGJSBsim(void);
    FGJSBsim::~FGJSBsim();

    // copy FDM state to LaRCsim structures
    bool copy_to_JSBsim();

    // copy FDM state from LaRCsim structures
    bool copy_from_JSBsim();

    // reset flight params to a specific position 
    bool init( double dt );
    
    // Positions
    void set_Latitude(double lat);  // geocentric
    void set_Longitude(double lon);    
    void set_Altitude(double alt);        // triggers re-calc of AGL altitude
    //void set_AltitudeAGL(double altagl); // and vice-versa
    
    // Speeds -- setting any of these will trigger a re-calc of the rest
    void set_V_calibrated_kts(double vc);
    void set_Mach_number(double mach);
    void set_Velocities_Local( double north, double east, double down );
    void set_Velocities_Wind_Body( double u, double v, double w);
    
    // Euler angles 
    void set_Euler_Angles( double phi, double theta, double psi );
    
    // Flight Path
    void set_Climb_Rate( double roc);
    void set_Gamma_vert_rad( double gamma);
    
    // Earth
    void set_Sea_level_radius(double slr);
    void set_Runway_altitude(double ralt);
    
    // Atmosphere
    void set_Static_pressure(double p);
    void set_Static_temperature(double T);
    void set_Density(double rho);
    void set_Velocities_Local_Airmass (double wnorth, 
				       double weast, 
				       double wdown );

    // update position based on inputs, positions, velocities, etc.
    bool update( int multiloop );
};


#endif // _JSBSIM_HXX