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 "../Include/constants.h"
34 #include "../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/moon.h"
42 #include "../Scenery/scenery.h"
43 #include "../Scenery/sky.h"
44 #include "../Scenery/stars.h"
45 #include "../Scenery/sun.h"
46 #include "../Time/event.h"
47 #include "../Time/fg_time.h"
48 #include "../Time/sunpos.h"
49 #include "../Weather/weather.h"
52 extern int show_hud; /* HUD state */
53 extern int displayInstruments;
56 /* General house keeping initializations */
58 void fgInitGeneral( void ) {
63 printf("General Initialization\n");
64 printf("======= ==============\n");
66 /* seed the random number generater */
69 /* determine the fg root path */
70 if ( (g->root_dir = getenv("FG_ROOT")) == NULL ) {
71 /* environment variable not defined */
72 printf("FG_ROOT needs to be defined! See the documentation.\n");
75 printf("FG_ROOT = %s\n", g->root_dir);
81 /* This is the top level init routine which calls all the other
82 * initialization routines. If you are adding a subsystem to flight
83 * gear, its initialization call should located in this routine.*/
85 void fgInitSubsystems( void ) {
93 f = ¤t_aircraft.flight;
94 l = &cur_light_params;
98 printf("Initialize Subsystems\n");
99 printf("========== ==========\n");
101 /****************************************************************
102 * The following section sets up the flight model EOM parameters and
103 * should really be read in from one or more files.
104 ****************************************************************/
106 /* Globe Aiport, AZ */
107 FG_Runway_longitude = -398391.28;
108 FG_Runway_latitude = 120070.41;
109 FG_Runway_altitude = 3234.5;
110 FG_Runway_heading = 102.0 * DEG_TO_RAD;
112 /* Initial Position at GLOBE airport */
113 FG_Longitude = ( -398391.28 / 3600.0 ) * DEG_TO_RAD;
114 FG_Latitude = ( 120070.41 / 3600.0 ) * DEG_TO_RAD;
115 FG_Altitude = FG_Runway_altitude + 3.758099;
117 /* Initial Position north of the city of Globe */
118 /* FG_Longitude = ( -398673.28 / 3600.0 ) * DEG_TO_RAD; */
119 /* FG_Latitude = ( 120625.64 / 3600.0 ) * DEG_TO_RAD; */
120 /* FG_Longitude = ( -397867.44 / 3600.0 ) * DEG_TO_RAD; */
121 /* FG_Latitude = ( 119548.21 / 3600.0 ) * DEG_TO_RAD; */
122 /* FG_Altitude = 0.0 + 3.758099; */
124 /* Initial Position: 10125 Jewell St. NE */
125 /* FG_Longitude = ( -93.15 ) * DEG_TO_RAD; */
126 /* FG_Latitude = ( 45.15 ) * DEG_TO_RAD; */
127 /* FG_Altitude = FG_Runway_altitude + 3.758099; */
129 /* A random test position */
130 /* FG_Longitude = ( 88128.00 / 3600.0 ) * DEG_TO_RAD; */
131 /* FG_Latitude = ( 93312.00 / 3600.0 ) * DEG_TO_RAD; */
132 FG_Runway_altitude = 4000.0;
133 FG_Altitude = FG_Runway_altitude + 3.758099;
135 printf("Initial position is: (%.4f, %.4f, %.2f)\n",
136 FG_Longitude * RAD_TO_DEG, FG_Latitude * RAD_TO_DEG,
137 FG_Altitude * FEET_TO_METER);
139 /* Initial Velocity */
140 FG_V_north = 0.0 /* 7.287719E+00 */;
141 FG_V_east = 0.0 /* 1.521770E+03 */;
142 FG_V_down = 0.0 /* -1.265722E-05 */;
144 /* Initial Orientation */
145 FG_Phi = -2.658474E-06;
146 FG_Theta = 7.401790E-03;
147 FG_Psi = 270.0 * DEG_TO_RAD;
149 /* Initial Angular B rates */
150 FG_P_body = 7.206685E-05;
151 FG_Q_body = 0.000000E+00;
152 FG_R_body = 9.492658E-05;
154 FG_Earth_position_angle = 0.000000E+00;
156 /* Mass properties and geometry values */
157 FG_Mass = 8.547270E+01;
158 FG_I_xx = 1.048000E+03;
159 FG_I_yy = 3.000000E+03;
160 FG_I_zz = 3.530000E+03;
161 FG_I_xz = 0.000000E+00;
163 /* CG position w.r.t. ref. point */
164 FG_Dx_cg = 0.000000E+00;
165 FG_Dy_cg = 0.000000E+00;
166 FG_Dz_cg = 0.000000E+00;
168 /* Set initial position and slew parameters */
169 /* fgSlewInit(-398391.3, 120070.41, 244, 3.1415); */ /* GLOBE Airport */
170 /* fgSlewInit(-335340,162540, 15, 4.38); */
171 /* fgSlewInit(-398673.28,120625.64, 53, 4.38); */
173 /* Initialize the event manager */
176 /* Dump event stats every 60 seconds */
177 fgEventRegister( "fgEventPrintStats()", fgEventPrintStats,
178 FG_EVENT_READY, 60000 );
180 /* Initialize "time" */
184 /* fgViewUpdate() needs the sun in the right place, while
185 * fgUpdateSunPos() needs to know the view position. I'll get
186 * around this interdependency for now by calling fgUpdateSunPos()
187 * once, then moving on with normal initialization. */
190 /* Initialize view parameters */
192 fgViewUpdate(f, v, l);
194 /* Initialize shared sun position and sun_vec */
195 fgEventRegister( "fgUpdateSunPos()", fgUpdateSunPos, FG_EVENT_READY, 1000 );
197 /* Initialize the weather modeling subsystem */
200 /* update the weather for our current position */
201 fgEventRegister( "fgWeatherUpdate()", fgWeatherUpdate,
202 FG_EVENT_READY, 120000 );
204 /* Initialize the Cockpit subsystem */
205 if( fgCockpitInit( current_aircraft ) == NULL ) {
206 printf( "Error in Cockpit initialization!\n" );
210 /* Initialize the orbital elements of sun, moon and mayor planets */
211 fgSolarSystemInit(*t);
213 /* Initialize the Stars subsystem */
216 /* Initialize the sun's position */
217 fgEventRegister( "fgSunInit()", fgSunInit, FG_EVENT_READY, 600000 );
219 /* Intialize the moon's position */
220 fgEventRegister( "fgMoonInit()", fgSunInit, FG_EVENT_READY, 600000 );
222 /* Initialize the "sky" */
225 /* Initialize the Scenery Management subsystem */
228 /* Tell the Scenery Management system where we are so it can load
229 * the correct scenery data */
230 fgSceneryUpdate(FG_Latitude, FG_Longitude, FG_Altitude);
232 /* I'm just sticking this here for now, it should probably move
234 cur_elev = mesh_altitude(FG_Longitude * RAD_TO_DEG * 3600.0,
235 FG_Latitude * RAD_TO_DEG * 3600.0);
236 printf("True ground elevation is %.2f meters here.\n", cur_elev);
237 if ( cur_elev > -9990.0 ) {
238 FG_Runway_altitude = cur_elev * METER_TO_FEET;
241 if ( FG_Altitude < FG_Runway_altitude ) {
242 FG_Altitude = FG_Runway_altitude + 3.758099;
244 printf("Updated position (after elevation adj): (%.4f, %.4f, %.2f)\n",
245 FG_Latitude * RAD_TO_DEG, FG_Longitude * RAD_TO_DEG,
246 FG_Altitude * FEET_TO_METER);
247 /* end of thing that I just stuck in that I should probably move */
249 /* Initialize the flight model subsystem data structures base on
251 fgFlightModelInit( FG_LARCSIM, f, 1.0 / DEFAULT_MODEL_HZ );
253 /* To HUD or not to HUD */
256 /* Let's show the instrument panel */
257 displayInstruments = 0;
259 /* Joystick support */
262 /* One more try here to get the sky synced up */
270 /* Revision 1.26 1997/12/30 23:09:04 curt
271 /* Tweaking initialization sequences.
273 * Revision 1.25 1997/12/30 22:22:33 curt
274 * Further integration of event manager.
276 * Revision 1.24 1997/12/30 20:47:44 curt
277 * Integrated new event manager with subsystem initializations.
279 * Revision 1.23 1997/12/30 16:36:50 curt
280 * Merged in Durk's changes ...
282 * Revision 1.22 1997/12/19 23:34:05 curt
283 * Lot's of tweaking with sky rendering and lighting.
285 * Revision 1.21 1997/12/19 16:45:00 curt
286 * Working on scene rendering order and options.
288 * Revision 1.20 1997/12/18 23:32:33 curt
289 * First stab at sky dome actually starting to look reasonable. :-)
291 * Revision 1.19 1997/12/17 23:13:36 curt
292 * Began working on rendering a sky.
294 * Revision 1.18 1997/12/15 23:54:49 curt
295 * Add xgl wrappers for debugging.
296 * Generate terrain normals on the fly.
298 * Revision 1.17 1997/12/15 20:59:09 curt
301 * Revision 1.16 1997/12/12 19:52:48 curt
302 * Working on lightling and material properties.
304 * Revision 1.15 1997/12/11 04:43:55 curt
305 * Fixed sun vector and lighting problems. I thing the moon is now lit
308 * Revision 1.14 1997/12/10 22:37:47 curt
309 * Prepended "fg" on the name of all global structures that didn't have it yet.
310 * i.e. "struct WEATHER {}" became "struct fgWEATHER {}"
312 * Revision 1.13 1997/11/25 19:25:32 curt
313 * Changes to integrate Durk's moon/sun code updates + clean up.
315 * Revision 1.12 1997/11/15 18:16:35 curt
318 * Revision 1.11 1997/10/30 12:38:42 curt
319 * Working on new scenery subsystem.
321 * Revision 1.10 1997/10/25 03:24:23 curt
322 * Incorporated sun, moon, and star positioning code contributed by Durk Talsma.
324 * Revision 1.9 1997/09/23 00:29:39 curt
325 * Tweaks to get things to compile with gcc-win32.
327 * Revision 1.8 1997/09/22 14:44:20 curt
328 * Continuing to try to align stars correctly.
330 * Revision 1.7 1997/09/16 15:50:30 curt
331 * Working on star alignment and time issues.
333 * Revision 1.6 1997/09/05 14:17:30 curt
334 * More tweaking with stars.
336 * Revision 1.5 1997/09/04 02:17:36 curt
339 * Revision 1.4 1997/08/27 21:32:26 curt
340 * Restructured view calculation code. Added stars.
342 * Revision 1.3 1997/08/27 03:30:19 curt
343 * Changed naming scheme of basic shared structures.
345 * Revision 1.2 1997/08/25 20:27:23 curt
346 * Merged in initial HUD and Joystick code.
348 * Revision 1.1 1997/08/23 01:46:20 curt