1 /**************************************************************************
2 * fg_init.c -- Flight Gear top level initialization routines
4 * Written by Curtis Olson, started August 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 **************************************************************************/
33 #include "../constants.h"
34 #include "../general.h"
36 #include "../Aircraft/aircraft.h"
37 #include "../Cockpit/cockpit.h"
38 #include "../Joystick/joystick.h"
39 #include "../Math/fg_random.h"
40 #include "../Scenery/mesh.h"
41 #include "../Scenery/astro.h"
42 #include "../Scenery/scenery.h"
43 #include "../Time/fg_time.h"
44 #include "../Time/sunpos.h"
45 #include "../Weather/weather.h"
48 extern int show_hud; /* HUD state */
51 /* General house keeping initializations */
53 void fgInitGeneral( void ) {
58 /* seed the random number generater */
61 /* determine the fg root path */
62 if ( (g->root_dir = getenv("FG_ROOT")) == NULL ) {
63 /* environment variable not defined */
64 printf("FG_ROOT needs to be defined! See the documentation.\n");
67 printf("FG_ROOT = %s\n", g->root_dir);
71 /* This is the top level init routine which calls all the other
72 * initialization routines. If you are adding a subsystem to flight
73 * gear, its initialization call should located in this routine.*/
75 void fgInitSubsystems( void ) {
82 f = ¤t_aircraft.flight;
87 /****************************************************************
88 * The following section sets up the flight model EOM parameters and
89 * should really be read in from one or more files.
90 ****************************************************************/
92 /* Globe Aiport, AZ */
93 FG_Runway_longitude = -398391.28;
94 FG_Runway_latitude = 120070.41;
95 FG_Runway_altitude = 3234.5;
96 FG_Runway_heading = 102.0 * DEG_TO_RAD;
98 /* Initial Position at GLOBE airport */
99 FG_Longitude = ( -398391.28 / 3600.0 ) * DEG_TO_RAD;
100 FG_Latitude = ( 120070.41 / 3600.0 ) * DEG_TO_RAD;
101 FG_Altitude = FG_Runway_altitude + 3.758099;
104 /* Initial Position north of the city of Globe */
105 /* FG_Longitude = ( -398673.28 / 3600.0 ) * DEG_TO_RAD; */
106 /* FG_Latitude = ( 120625.64 / 3600.0 ) * DEG_TO_RAD; */
107 /* FG_Altitude = 0.0 + 3.758099; */
109 /* Initial Position: 10125 Jewell St. NE */
110 /* FG_Longitude = ( -93.15 ) * DEG_TO_RAD; */
111 /* FG_Latitude = ( 45.15 ) * DEG_TO_RAD; */
112 /* FG_Altitude = FG_Runway_altitude + 3.758099; */
114 /* A random test position */
115 /* FG_Longitude = ( 88128.00 / 3600.0 ) * DEG_TO_RAD; */
116 /* FG_Latitude = ( 93312.00 / 3600.0 ) * DEG_TO_RAD; */
118 printf("Initial position is: (%.4f, %.4f, %.2f)\n",
119 FG_Longitude * RAD_TO_DEG, FG_Latitude * RAD_TO_DEG,
120 FG_Altitude * FEET_TO_METER);
122 /* Initial Velocity */
123 FG_V_north = 0.0 /* 7.287719E+00 */;
124 FG_V_east = 0.0 /* 1.521770E+03 */;
125 FG_V_down = 0.0 /* -1.265722E-05 */;
127 /* Initial Orientation */
128 FG_Phi = -2.658474E-06;
129 FG_Theta = 7.401790E-03;
130 FG_Psi = 270.0 * DEG_TO_RAD;
131 /* FG_Psi = 0.0 * DEG_TO_RAD; */
133 /* Initial Angular B rates */
134 FG_P_body = 7.206685E-05;
135 FG_Q_body = 0.000000E+00;
136 FG_R_body = 9.492658E-05;
138 FG_Earth_position_angle = 0.000000E+00;
140 /* Mass properties and geometry values */
141 FG_Mass = 8.547270E+01;
142 FG_I_xx = 1.048000E+03;
143 FG_I_yy = 3.000000E+03;
144 FG_I_zz = 3.530000E+03;
145 FG_I_xz = 0.000000E+00;
147 /* CG position w.r.t. ref. point */
148 FG_Dx_cg = 0.000000E+00;
149 FG_Dy_cg = 0.000000E+00;
150 FG_Dz_cg = 0.000000E+00;
152 /* Set initial position and slew parameters */
153 /* fgSlewInit(-398391.3, 120070.41, 244, 3.1415); */ /* GLOBE Airport */
154 /* fgSlewInit(-335340,162540, 15, 4.38); */
155 /* fgSlewInit(-398673.28,120625.64, 53, 4.38); */
157 /* Initialize "time" */
161 /* Initialize shared sun position and sun_vec */
162 fgUpdateSunPos(scenery.center);
164 /* Initialize view parameters */
167 /* Initialize the weather modeling subsystem */
170 /* Initialize the Cockpit subsystem */
171 if( fgCockpitInit( current_aircraft ) == NULL )
173 printf( "Error in Cockpit initialization!\n" );
177 /* Initialize Astronomical Objects */
180 /* Initialize the Scenery Management subsystem */
183 /* Tell the Scenery Management system where we are so it can load
184 * the correct scenery data */
185 fgSceneryUpdate(FG_Latitude, FG_Longitude, FG_Altitude);
188 /* I'm just sticking this here for now, it should probably move
190 cur_elev = mesh_altitude(FG_Longitude * RAD_TO_DEG * 3600.0,
191 FG_Latitude * RAD_TO_DEG * 3600.0);
192 printf("Ground elevation is %.2f meters here.\n", cur_elev);
193 if ( cur_elev > -9990.0 ) {
194 FG_Runway_altitude = cur_elev * METER_TO_FEET;
197 if ( FG_Altitude < FG_Runway_altitude ) {
198 FG_Altitude = FG_Runway_altitude + 3.758099;
200 printf("Updated position is: (%.4f, %.4f, %.2f)\n",
201 FG_Latitude * RAD_TO_DEG, FG_Longitude * RAD_TO_DEG,
202 FG_Altitude * FEET_TO_METER);
203 /* end of thing that I just stuck in that I should probably move */
206 /* Initialize the flight model subsystem data structures base on
208 fgFlightModelInit( FG_LARCSIM, f, 1.0 / DEFAULT_MODEL_HZ );
210 /* To HUD or not to HUD */
213 /* Joystick support */
219 /* Revision 1.14 1997/12/10 22:37:47 curt
220 /* Prepended "fg" on the name of all global structures that didn't have it yet.
221 /* i.e. "struct WEATHER {}" became "struct fgWEATHER {}"
223 * Revision 1.13 1997/11/25 19:25:32 curt
224 * Changes to integrate Durk's moon/sun code updates + clean up.
226 * Revision 1.12 1997/11/15 18:16:35 curt
229 * Revision 1.11 1997/10/30 12:38:42 curt
230 * Working on new scenery subsystem.
232 * Revision 1.10 1997/10/25 03:24:23 curt
233 * Incorporated sun, moon, and star positioning code contributed by Durk Talsma.
235 * Revision 1.9 1997/09/23 00:29:39 curt
236 * Tweaks to get things to compile with gcc-win32.
238 * Revision 1.8 1997/09/22 14:44:20 curt
239 * Continuing to try to align stars correctly.
241 * Revision 1.7 1997/09/16 15:50:30 curt
242 * Working on star alignment and time issues.
244 * Revision 1.6 1997/09/05 14:17:30 curt
245 * More tweaking with stars.
247 * Revision 1.5 1997/09/04 02:17:36 curt
250 * Revision 1.4 1997/08/27 21:32:26 curt
251 * Restructured view calculation code. Added stars.
253 * Revision 1.3 1997/08/27 03:30:19 curt
254 * Changed naming scheme of basic shared structures.
256 * Revision 1.2 1997/08/25 20:27:23 curt
257 * Merged in initial HUD and Joystick code.
259 * Revision 1.1 1997/08/23 01:46:20 curt