1 /**************************************************************************
2 * flight.c -- a general interface to the various flight models
4 * Written by Curtis Olson, started May 1997.
6 * Copyright (C) 1997 Curtis L. Olson - curt@infoplane.com
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of the
11 * License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 * (Log is kept at end of this file)
24 **************************************************************************/
28 #include <Debug/fg_debug.h>
29 #include <Flight/flight.h>
30 #include <Flight/LaRCsim/ls_interface.h>
31 #include <Include/fg_constants.h>
32 #include <Math/fg_geodesy.h>
35 fgFLIGHT cur_flight_params;
38 /* Initialize the flight model parameters */
39 int fgFlightModelInit(int model, fgFLIGHT *f, double dt) {
42 fgPrintf(FG_FLIGHT,FG_INFO,"Initializing flight model\n");
44 if ( model == FG_SLEW ) {
46 } else if ( model == FG_LARCSIM ) {
47 fgFlight_2_LaRCsim(f); /* translate FG to LaRCsim structure */
49 fgPrintf( FG_FLIGHT, FG_INFO, "FG pos = %.2f\n", FG_Latitude );
50 fgLaRCsim_2_Flight(f); /* translate LaRCsim back to FG structure */
52 fgPrintf( FG_FLIGHT, FG_WARN,
53 "Unimplemented flight model == %d\n", model );
62 /* Run multiloop iterations of the flight model */
63 int fgFlightModelUpdate(int model, fgFLIGHT *f, int multiloop) {
66 // printf("Altitude = %.2f\n", FG_Altitude * 0.3048);
68 if ( model == FG_SLEW ) {
69 // fgSlewUpdate(f, multiloop);
70 } else if ( model == FG_LARCSIM ) {
71 fgLaRCsimUpdate(f, multiloop);
73 fgPrintf( FG_FLIGHT, FG_WARN,
74 "Unimplemented flight model == %d\n", model );
83 /* Set the altitude (force) */
84 int fgFlightModelSetAltitude(int model, fgFLIGHT *f, double alt_meters) {
85 double sea_level_radius_meters;
87 // Set the FG variables first
88 fgGeodToGeoc( FG_Latitude, alt_meters,
89 &sea_level_radius_meters, &lat_geoc);
91 FG_Altitude = alt_meters * METER_TO_FEET;
92 FG_Radius_to_vehicle = FG_Altitude +
93 (sea_level_radius_meters * METER_TO_FEET);
95 /* additional work needed for some flight models */
96 if ( model == FG_LARCSIM ) {
97 ls_ForceAltitude(FG_Altitude);
104 /* Revision 1.15 1998/07/30 23:44:36 curt
105 /* Beginning to add support for multiple flight models.
107 * Revision 1.14 1998/07/12 03:08:27 curt
108 * Added fgFlightModelSetAltitude() to force the altitude to something
109 * other than the current altitude. LaRCsim doesn't let you do this by just
110 * changing FG_Altitude.
112 * Revision 1.13 1998/04/25 22:06:28 curt
113 * Edited cvs log messages in source files ... bad bad bad!
115 * Revision 1.12 1998/04/21 16:59:33 curt
116 * Integrated autopilot.
117 * Prepairing for C++ integration.
119 * Revision 1.11 1998/04/18 04:14:04 curt
120 * Moved fg_debug.c to it's own library.
122 * Revision 1.10 1998/02/07 15:29:37 curt
123 * Incorporated HUD changes and struct/typedef changes from Charlie Hotchkiss
124 * <chotchkiss@namg.us.anritsu.com>
126 * Revision 1.9 1998/01/27 00:47:53 curt
127 * Incorporated Paul Bleisch's <pbleisch@acm.org> new debug message
128 * system and commandline/config file processing code.
130 * Revision 1.8 1998/01/19 19:27:03 curt
131 * Merged in make system changes from Bob Kuehne <rpk@sgi.com>
132 * This should simplify things tremendously.
134 * Revision 1.7 1998/01/19 18:40:23 curt
135 * Tons of little changes to clean up the code and to remove fatal errors
136 * when building with the c++ compiler.
138 * Revision 1.6 1998/01/19 18:35:43 curt
139 * Minor tweaks and fixes for cygwin32.
141 * Revision 1.5 1997/12/30 20:47:37 curt
142 * Integrated new event manager with subsystem initializations.
144 * Revision 1.4 1997/12/10 22:37:42 curt
145 * Prepended "fg" on the name of all global structures that didn't have it yet.
146 * i.e. "struct WEATHER {}" became "struct fgWEATHER {}"
148 * Revision 1.3 1997/08/27 03:30:04 curt
149 * Changed naming scheme of basic shared structures.
151 * Revision 1.2 1997/05/29 22:39:57 curt
152 * Working on incorporating the LaRCsim flight model.
154 * Revision 1.1 1997/05/29 02:35:04 curt