flightgear/Cockpit/cockpit.cxx

//*************************************************************************
// cockpit.cxx -- routines to draw a cockpit (initial draft)
//
// Written by Michele America, started September 1997.
//
// Copyright (C) 1997  Michele F. America  - nomimarketing@mail.telepac.pt
//
// 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)
//*************************************************************************/


#ifdef HAVE_CONFIG_H
#  include <config.h>
#endif

#ifdef HAVE_WINDOWS_H          
#  include <windows.h>
#endif

#include <GL/glut.h>
#include <XGL/xgl.h>

#include <stdlib.h>
#include <stdio.h>
#include <string.h>

#include <Aircraft/aircraft.hxx>
#include <Debug/logstream.hxx>
#include <Include/fg_constants.h>
#include <Include/general.h>
#include <Main/options.hxx>
#include <Main/views.hxx>
#include <Math/fg_random.h>
#include <Math/mat3.h>
#include <Math/polar3d.hxx>
#include <Scenery/scenery.hxx>
#include <Time/fg_timer.hxx>

#include "cockpit.hxx"


// This is a structure that contains all data related to
// cockpit/panel/hud system

static pCockpit ac_cockpit;

// The following routines obtain information concerntin the aircraft's
// current state and return it to calling instrument display routines.
// They should eventually be member functions of the aircraft.
//

double get_latitude( void )
{
	FGState *f;
	f = current_aircraft.fdm_state;

//	return( toDM(FG_Latitude * RAD_TO_DEG) );
	return((double)((int)( f->get_Latitude() * RAD_TO_DEG)) );
}

double get_lat_min( void )
{
	FGState *f;
	double      a, d;

	f = current_aircraft.fdm_state;
	
	a = f->get_Latitude() * RAD_TO_DEG;	
	if (a < 0.0) {
		a = -a;
	}
	d = (double) ( (int) a);
	return( (a - d) * 60.0);
}


double get_longitude( void )
{
	FGState *f;
	f = current_aircraft.fdm_state;

//	return( toDM(FG_Longitude * RAD_TO_DEG) );
	return((double)((int) (f->get_Longitude() * RAD_TO_DEG)) );
}
double get_long_min( void )
{
	FGState *f;
	double  a, d;

	f = current_aircraft.fdm_state;
	
	a = f->get_Longitude() * RAD_TO_DEG;	
	if (a < 0.0) {
		a = -a;
	}
	d = (double) ( (int) a);
	return( (a - d) * 60.0);
}

double get_throttleval( void )
{
    return controls.get_throttle( 0 );     // Hack limiting to one engine
}

double get_aileronval( void )
{
    return controls.get_aileron();
}

double get_elevatorval( void )
{
    return controls.get_elevator();
}

double get_elev_trimval( void )
{
    return controls.get_elevator_trim();
}

double get_rudderval( void )
{
    return controls.get_rudder();
}

double get_speed( void )
{
	FGState *f;

	f = current_aircraft.fdm_state;
	return( f->get_V_equiv_kts() );    // Make an explicit function call.
}

double get_aoa( void )
{
	FGState *f;
              
	f = current_aircraft.fdm_state;
	return( f->get_Gamma_vert_rad() * RAD_TO_DEG );
}

double get_roll( void )
{
	FGState *f;

	f = current_aircraft.fdm_state;
	return( f->get_Phi() );
}

double get_pitch( void )
{
	FGState *f;
              
	f = current_aircraft.fdm_state;
	return( f->get_Theta() );
}

double get_heading( void )
{
	FGState *f;

	f = current_aircraft.fdm_state;
	return( f->get_Psi() * RAD_TO_DEG );
}

double get_altitude( void )
{
	FGState *f;
	// double rough_elev;

	f = current_aircraft.fdm_state;
	// rough_elev = mesh_altitude(f->get_Longitude() * RAD_TO_ARCSEC,
	//		                   f->get_Latitude()  * RAD_TO_ARCSEC);

	if ( current_options.get_units() == fgOPTIONS::FG_UNITS_FEET ) {
	    return f->get_Altitude();
	} else {
	    return f->get_Altitude() * FEET_TO_METER;
	}
}

double get_agl( void )
{
        FGState *f;

        f = current_aircraft.fdm_state;

	if ( current_options.get_units() == fgOPTIONS::FG_UNITS_FEET ) {
	    return f->get_Altitude() - scenery.cur_elev * METER_TO_FEET;
	} else {
	    return f->get_Altitude() * FEET_TO_METER - scenery.cur_elev;
	}
}

double get_sideslip( void )
{
        FGState *f;
        
        f = current_aircraft.fdm_state;
        
        return( f->get_Beta() );
}

double get_frame_rate( void )
{
    fgGENERAL *pgeneral;
 
    pgeneral = &general;                     
 
    return pgeneral->frame_rate;
}

double get_fov( void )
{
    return (current_options.get_fov()); 
}

double get_vfc_ratio( void )
{
    fgVIEW *pview;
 
    pview = &current_view;
 
    return pview->vfc_ratio;
}

double get_vfc_tris_drawn   ( void )
{
    return current_view.tris_rendered;
}

double get_climb_rate( void )
{
	FGState *f;

	f = current_aircraft.fdm_state;

	if ( current_options.get_units() == fgOPTIONS::FG_UNITS_FEET ) {
	    return f->get_Climb_Rate() * 60.0;
	} else {
	    return f->get_Climb_Rate() * FEET_TO_METER * 60.0;
	}
}


bool fgCockpitInit( fgAIRCRAFT *cur_aircraft )
{
    FG_LOG( FG_COCKPIT, FG_INFO, "Initializing cockpit subsystem" );

    //	cockpit->code = 1;	/* It will be aircraft dependent */
    //	cockpit->status = 0;

    // If aircraft has HUD specified we will get the specs from its def
    // file. For now we will depend upon hard coding in hud?
    
    // We must insure that the existing instrument link is purged.
    // This is done by deleting the links in the list.
    
    // HI_Head is now a null pointer so we can generate a new list from the
    // current aircraft.

    fgHUDInit( cur_aircraft );
    ac_cockpit = new fg_Cockpit();
    
    if ( current_options.get_panel_status() ) {
	fgPanelInit();
    }

    FG_LOG( FG_COCKPIT, FG_INFO,
	    "  Code " << ac_cockpit->code() << " Status " 
	    << ac_cockpit->status() );
    
    return true;
}


void fgCockpitUpdate( void ) {
    fgVIEW *pview;

    pview = &current_view;

    FG_LOG( FG_COCKPIT, FG_DEBUG,
	    "Cockpit: code " << ac_cockpit->code() << " status " 
	    << ac_cockpit->status() );

    if ( current_options.get_hud_status() ) {
	// This will check the global hud linked list pointer.
	// If these is anything to draw it will.
	fgUpdateHUD();
    }

    if ( current_options.get_panel_status() && 
	 (fabs(pview->view_offset) < 0.2) ) {
	xglViewport(0, 0, pview->winWidth, pview->winHeight);
	fgPanelUpdate();
    }
}


// $Log$
// Revision 1.25  1998/12/05 15:54:07  curt
// Renamed class fgFLIGHT to class FGState as per request by JSB.
//
// Revision 1.24  1998/12/03 01:16:00  curt
// Converted fgFLIGHT to a class.
//
// Revision 1.23  1998/11/09 23:38:50  curt
// Panel updates from Friedemann.
//
// Revision 1.22  1998/11/06 21:17:45  curt
// Converted to new logstream debugging facility.  This allows release
// builds with no messages at all (and no performance impact) by using
// the -DFG_NDEBUG flag.
//
// Revision 1.21  1998/11/02 23:04:02  curt
// HUD units now display in feet by default with meters being a command line
// option.
//
// Revision 1.20  1998/10/25 14:08:40  curt
// Turned "struct fgCONTROLS" into a class, with inlined accessor functions.
//
// Revision 1.19  1998/10/17 01:33:56  curt
// C++ ifying ...
//
// Revision 1.18  1998/10/16 23:27:23  curt
// C++-ifying.
//
// Revision 1.17  1998/09/29 14:56:30  curt
// c++-ified comments.
//
// Revision 1.16  1998/09/29 02:01:06  curt
// Added a "rate of climb" indicator.
//
// Revision 1.15  1998/08/28 18:14:39  curt
// Added new cockpit code from Friedemann Reinhard
// <mpt218@faupt212.physik.uni-erlangen.de>
//
// Revision 1.14  1998/08/24 20:05:15  curt
// Added a second minimalistic HUD.
// Added code to display the number of triangles rendered.
//
// Revision 1.13  1998/08/22 01:19:27  curt
// Omit panel code because it's texture loading overruns array bounds.
//
// Revision 1.12  1998/07/13 21:28:00  curt
// Converted the aoa scale to a radio altimeter.
//
// Revision 1.11  1998/07/13 21:00:45  curt
// Integrated Charlies latest HUD updates.
// Wrote access functions for current fgOPTIONS.
//
// Revision 1.10  1998/07/08 14:41:08  curt
// Renamed polar3d.h to polar3d.hxx
//
// Revision 1.9  1998/06/27 16:47:53  curt
// Incorporated Friedemann Reinhard's <mpt218@faupt212.physik.uni-erlangen.de>
// first pass at an isntrument panel.
//
// Revision 1.8  1998/05/17 16:58:12  curt
// Added a View Frustum Culling ratio display to the hud.
//
// Revision 1.7  1998/05/16 13:04:13  curt
// New updates from Charlie Hotchkiss.
//
// Revision 1.6  1998/05/13 18:27:53  curt
// Added an fov to hud display.
//
// Revision 1.5  1998/05/11 18:13:10  curt
// Complete C++ rewrite of all cockpit code by Charlie Hotchkiss.
//
// Revision 1.4  1998/05/03 00:46:45  curt
// polar.h -> polar3d.h
//
// Revision 1.3  1998/04/30 12:36:02  curt
// C++-ifying a couple source files.
//
// Revision 1.2  1998/04/25 22:06:26  curt
// Edited cvs log messages in source files ... bad bad bad!
//
// Revision 1.1  1998/04/24 00:45:54  curt
// C++-ifing the code a bit.
//
// Revision 1.13  1998/04/18 04:14:01  curt
// Moved fg_debug.c to it's own library.
//
// Revision 1.12  1998/04/14 02:23:09  curt
// Code reorganizations.  Added a Lib/ directory for more general libraries.
//
// Revision 1.11  1998/03/14 00:32:13  curt
// Changed a printf() to a fgPrintf().
//
// Revision 1.10  1998/02/07 15:29:33  curt
// Incorporated HUD changes and struct/typedef changes from Charlie Hotchkiss
// <chotchkiss@namg.us.anritsu.com>
//
// Revision 1.9  1998/02/03 23:20:14  curt
// Lots of little tweaks to fix various consistency problems discovered by
// Solaris' CC.  Fixed a bug in fg_debug.c with how the fgPrintf() wrapper
// passed arguments along to the real printf().  Also incorporated HUD changes
// by Michele America.
//
// Revision 1.8  1998/01/31 00:43:03  curt
// Added MetroWorks patches from Carmen Volpe.
//
// Revision 1.7  1998/01/27 00:47:51  curt
// Incorporated Paul Bleisch's <bleisch@chromatic.com> new debug message
// system and commandline/config file processing code.
//
// Revision 1.6  1998/01/19 19:27:01  curt
// Merged in make system changes from Bob Kuehne <rpk@sgi.com>
// This should simplify things tremendously.
//
// Revision 1.5  1998/01/19 18:40:19  curt
// Tons of little changes to clean up the code and to remove fatal errors
// when building with the c++ compiler.
//
// Revision 1.4  1997/12/30 20:47:34  curt
// Integrated new event manager with subsystem initializations.
//
// Revision 1.3  1997/12/15 23:54:33  curt
// Add xgl wrappers for debugging.
// Generate terrain normals on the fly.
//
// Revision 1.2  1997/12/10 22:37:38  curt
// Prepended "fg" on the name of all global structures that didn't have it yet.
// i.e. "struct WEATHER {}" became "struct fgWEATHER {}"
//
// Revision 1.1  1997/08/29 18:03:20  curt
// Initial revision.
//