1 /**************************************************************************
2 * weather.c -- routines to model weather
4 * Written by Curtis Olson, started July 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 **************************************************************************/
27 #include <Weather/weather.h>
28 #include <Aircraft/aircraft.h>
29 #include <Math/fg_random.h>
32 /* This is a record containing current weather info */
33 struct fgWEATHER current_weather;
36 /* Initialize the weather modeling subsystem */
37 void fgWeatherInit( void ) {
42 printf("Initializing weather subsystem\n");
44 /* Configure some wind */
45 /* FG_V_north_airmass = 15; */ /* ft/s =~ 10mph */
47 w->visibility = 45000.0; /* in meters */
51 /* Update the weather parameters for the current position */
52 void fgWeatherUpdate( void ) {
56 f = ¤t_aircraft.flight;
59 /* Add some random turbulence */
60 /* FG_U_gust = fg_random() * 1.0 - 0.5;
61 FG_V_gust = fg_random() * 1.0 - 0.5;
62 FG_W_gust = fg_random() * 1.0 - 0.5; */
67 /* Revision 1.12 1998/01/19 19:27:22 curt
68 /* Merged in make system changes from Bob Kuehne <rpk@sgi.com>
69 /* This should simplify things tremendously.
71 * Revision 1.11 1998/01/19 18:40:41 curt
72 * Tons of little changes to clean up the code and to remove fatal errors
73 * when building with the c++ compiler.
75 * Revision 1.10 1997/12/30 22:22:46 curt
76 * Further integration of event manager.
78 * Revision 1.9 1997/12/30 20:48:03 curt
79 * Integrated new event manager with subsystem initializations.
81 * Revision 1.8 1997/12/11 04:43:58 curt
82 * Fixed sun vector and lighting problems. I thing the moon is now lit
85 * Revision 1.7 1997/12/10 22:37:56 curt
86 * Prepended "fg" on the name of all global structures that didn't have it yet.
87 * i.e. "struct WEATHER {}" became "struct fgWEATHER {}"
89 * Revision 1.6 1997/08/27 03:30:38 curt
90 * Changed naming scheme of basic shared structures.
92 * Revision 1.5 1997/08/22 21:34:42 curt
93 * Doing a bit of reorganizing and house cleaning.
95 * Revision 1.4 1997/08/02 16:23:55 curt
98 * Revision 1.3 1997/07/31 22:52:41 curt
99 * Working on redoing internal coordinate systems & scenery transformations.
101 * Revision 1.2 1997/07/30 16:12:44 curt
102 * Moved fg_random routines from Util/ to Math/
104 * Revision 1.1 1997/07/19 23:03:57 curt