196 lines
5.7 KiB
C++
196 lines
5.7 KiB
C++
// flight.c -- a general interface to the various flight models
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//
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// Written by Curtis Olson, started May 1997.
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//
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// Copyright (C) 1997 Curtis L. Olson - curt@infoplane.com
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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//
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// $Id$
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// (Log is kept at end of this file)
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#include <stdio.h>
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#include "flight.hxx"
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#include "LaRCsim.hxx"
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#include <Debug/fg_debug.h>
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#include <Flight/LaRCsim/ls_interface.h>
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#include <Include/fg_constants.h>
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#include <Math/fg_geodesy.hxx>
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fgFLIGHT cur_flight_params;
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/* Initialize the flight model parameters */
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int fgFlightModelInit(int model, fgFLIGHT *f, double dt) {
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double save_alt = 0.0;
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int result;
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fgPrintf(FG_FLIGHT,FG_INFO,"Initializing flight model\n");
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if ( model == FG_SLEW ) {
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// fgSlewInit(dt);
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} else if ( model == FG_LARCSIM ) {
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/* lets try to avoid really screwing up the LaRCsim model */
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if ( FG_Altitude < -9000 ) {
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save_alt = FG_Altitude;
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FG_Altitude = 0;
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}
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fgFlight_2_LaRCsim(f); /* translate FG to LaRCsim structure */
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fgLaRCsimInit(dt);
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fgPrintf( FG_FLIGHT, FG_INFO, "FG pos = %.2f\n", FG_Latitude );
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fgLaRCsim_2_Flight(f); /* translate LaRCsim back to FG structure */
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/* but lets restore our original bogus altitude when we are done */
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if ( save_alt < -9000 ) {
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FG_Altitude = save_alt;
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}
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} else {
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fgPrintf( FG_FLIGHT, FG_WARN,
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"Unimplemented flight model == %d\n", model );
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}
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result = 1;
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return(result);
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}
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/* Run multiloop iterations of the flight model */
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int fgFlightModelUpdate(int model, fgFLIGHT *f, int multiloop) {
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double time_step, start_elev, end_elev;
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int result;
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// printf("Altitude = %.2f\n", FG_Altitude * 0.3048);
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time_step = (1.0 / DEFAULT_MODEL_HZ) * multiloop;
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start_elev = FG_Altitude;
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if ( model == FG_SLEW ) {
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// fgSlewUpdate(f, multiloop);
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} else if ( model == FG_LARCSIM ) {
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fgLaRCsimUpdate(f, multiloop);
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} else {
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fgPrintf( FG_FLIGHT, FG_WARN,
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"Unimplemented flight model == %d\n", model );
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}
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end_elev = FG_Altitude;
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FG_Climb_Rate = (end_elev - start_elev) / time_step; /* feet per second */
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result = 1;
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return(result);
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}
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/* Set the altitude (force) */
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void fgFlightModelSetAltitude(int model, fgFLIGHT *f, double alt_meters) {
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double sea_level_radius_meters;
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double lat_geoc;
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// Set the FG variables first
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fgGeodToGeoc( FG_Latitude, alt_meters,
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&sea_level_radius_meters, &lat_geoc);
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FG_Altitude = alt_meters * METER_TO_FEET;
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FG_Radius_to_vehicle = FG_Altitude +
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(sea_level_radius_meters * METER_TO_FEET);
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/* additional work needed for some flight models */
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if ( model == FG_LARCSIM ) {
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ls_ForceAltitude(FG_Altitude);
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}
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}
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// $Log$
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// Revision 1.2 1998/10/16 23:27:40 curt
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// C++-ifying.
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//
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// Revision 1.1 1998/10/16 20:16:41 curt
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// Renamed flight.[ch] to flight.[ch]xx
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//
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// Revision 1.19 1998/09/29 14:57:38 curt
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// c++-ified comments.
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//
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// Revision 1.18 1998/09/29 02:02:40 curt
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// Added a rate of climb calculation.
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//
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// Revision 1.17 1998/08/24 20:09:07 curt
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// .
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//
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// Revision 1.16 1998/08/22 14:49:55 curt
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// Attempting to iron out seg faults and crashes.
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// Did some shuffling to fix a initialization order problem between view
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// position, scenery elevation.
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//
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// Revision 1.15 1998/07/30 23:44:36 curt
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// Beginning to add support for multiple flight models.
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//
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// Revision 1.14 1998/07/12 03:08:27 curt
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// Added fgFlightModelSetAltitude() to force the altitude to something
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// other than the current altitude. LaRCsim doesn't let you do this by just
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// changing FG_Altitude.
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//
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// Revision 1.13 1998/04/25 22:06:28 curt
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// Edited cvs log messages in source files ... bad bad bad!
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//
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// Revision 1.12 1998/04/21 16:59:33 curt
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// Integrated autopilot.
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// Prepairing for C++ integration.
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//
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// Revision 1.11 1998/04/18 04:14:04 curt
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// Moved fg_debug.c to it's own library.
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//
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// Revision 1.10 1998/02/07 15:29:37 curt
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// Incorporated HUD changes and struct/typedef changes from Charlie Hotchkiss
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// <chotchkiss@namg.us.anritsu.com>
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//
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// Revision 1.9 1998/01/27 00:47:53 curt
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// Incorporated Paul Bleisch's <pbleisch@acm.org> new debug message
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// system and commandline/config file processing code.
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//
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// Revision 1.8 1998/01/19 19:27:03 curt
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// Merged in make system changes from Bob Kuehne <rpk@sgi.com>
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// This should simplify things tremendously.
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//
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// Revision 1.7 1998/01/19 18:40:23 curt
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// Tons of little changes to clean up the code and to remove fatal errors
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// when building with the c++ compiler.
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//
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// Revision 1.6 1998/01/19 18:35:43 curt
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// Minor tweaks and fixes for cygwin32.
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//
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// Revision 1.5 1997/12/30 20:47:37 curt
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// Integrated new event manager with subsystem initializations.
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//
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// Revision 1.4 1997/12/10 22:37:42 curt
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// Prepended "fg" on the name of all global structures that didn't have it yet.
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// i.e. "struct WEATHER {}" became "struct fgWEATHER {}"
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//
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// Revision 1.3 1997/08/27 03:30:04 curt
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// Changed naming scheme of basic shared structures.
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//
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// Revision 1.2 1997/05/29 22:39:57 curt
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// Working on incorporating the LaRCsim flight model.
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//
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// Revision 1.1 1997/05/29 02:35:04 curt
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// Initial revision.
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//
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