// slew.cxx -- the "slew" flight model
//
// Written by Curtis Olson, started May 1997.
//
// Copyright (C) 1997  Curtis L. Olson  - curt@infoplane.com
//
// 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.
//
// $Id$
// (Log is kept at end of this file)


#include <math.h>

#include "slew.hxx"

#include <FDM/flight.hxx>
#include <Aircraft/aircraft.hxx>
#include <Controls/controls.hxx>
#include <Include/fg_constants.h>


// reset flight params to a specific position
void fgSlewInit(double pos_x, double pos_y, double pos_z, double heading) {
    FGInterface *f;
    
    f = current_aircraft.fdm_state;

    /*
    f->pos_x = pos_x;
    f->pos_y = pos_y;
    f->pos_z = pos_z;

    f->vel_x = 0.0;
    f->vel_y = 0.0;
    f->vel_z = 0.0;

    f->Phi = 0.0;
    f->Theta = 0.0;
    f->Psi = 0.0;

    f->vel_Phi = 0.0;
    f->vel_Theta = 0.0;
    f->vel_Psi = 0.0;

    f->Psi = heading;
    */
}


// update position based on inputs, positions, velocities, etc.
void fgSlewUpdate( void ) {
    FGInterface *f;
    FGControls *c;

    f = current_aircraft.fdm_state;
    c = current_aircraft.controls;

    /* f->Psi += ( c->aileron / 8 );
    if ( f->Psi > FG_2PI ) {
	f->Psi -= FG_2PI;
    } else if ( f->Psi < 0 ) {
	f->Psi += FG_2PI;
    }

    f->vel_x = -c->elev;

    f->pos_x = f->pos_x + (cos(f->Psi) * f->vel_x);
    f->pos_y = f->pos_y + (sin(f->Psi) * f->vel_x); */
}


// $Log$
// Revision 1.6  1999/02/05 21:29:05  curt
// Modifications to incorporate Jon S. Berndts flight model code.
//
// Revision 1.5  1999/02/01 21:33:33  curt
// Renamed FlightGear/Simulator/Flight to FlightGear/Simulator/FDM since
// Jon accepted my offer to do this and thought it was a good idea.
//
// Revision 1.4  1998/12/05 16:13:14  curt
// Renamed class fgCONTROLS to class FGControls.
//
// Revision 1.3  1998/12/05 15:54:16  curt
// Renamed class fgFLIGHT to class FGState as per request by JSB.
//
// Revision 1.2  1998/10/17 01:34:17  curt
// C++ ifying ...
//
// Revision 1.1  1998/10/16 23:27:50  curt
// C++-ifying.
//
// Revision 1.13  1998/04/25 22:06:29  curt
// Edited cvs log messages in source files ... bad bad bad!
//
// Revision 1.12  1998/04/08 23:35:30  curt
// Tweaks to Gnu automake/autoconf system.
//
// Revision 1.11  1998/02/07 15:29:39  curt
// Incorporated HUD changes and struct/typedef changes from Charlie Hotchkiss
// <chotchkiss@namg.us.anritsu.com>
//
// Revision 1.10  1998/01/27 00:47:53  curt
// Incorporated Paul Bleisch's <pbleisch@acm.org> new debug message
// system and commandline/config file processing code.
//
// Revision 1.9  1998/01/19 19:27:06  curt
// Merged in make system changes from Bob Kuehne <rpk@sgi.com>
// This should simplify things tremendously.
//
// Revision 1.8  1998/01/19 18:40:30  curt
// Tons of little changes to clean up the code and to remove fatal errors
// when building with the c++ compiler.
//
// Revision 1.7  1997/12/15 23:54:42  curt
// Add xgl wrappers for debugging.
// Generate terrain normals on the fly.
//
// Revision 1.6  1997/08/27 03:30:11  curt
// Changed naming scheme of basic shared structures.
//
// Revision 1.5  1997/07/19 22:35:06  curt
// Moved fiddled with PI to avoid compiler warnings.
//
// Revision 1.4  1997/06/21 17:12:51  curt
// Capitalized subdirectory names.
//
// Revision 1.3  1997/05/29 22:40:00  curt
// Working on incorporating the LaRCsim flight model.
//
// Revision 1.2  1997/05/29 12:30:19  curt
// Some initial mods to work better in a timer environment.
//
// Revision 1.1  1997/05/29 02:29:42  curt
// Moved to their own directory.
//
// Revision 1.2  1997/05/23 15:40:37  curt
// Added GNU copyright headers.
//
// Revision 1.1  1997/05/16 16:04:45  curt
// Initial revision.
//