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 **************************************************************************/
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 /* Configure some wind */
43 /* FG_V_north_airmass = 15; */ /* ft/s =~ 10mph */
45 w->visibility = 60000.0; /* meters = 60km */
49 /* Update the weather parameters for the current position */
50 void fgWeatherUpdate(double lon, double lat, double alt) {
54 f = ¤t_aircraft.flight;
57 /* Add some random turbulence */
58 /* FG_U_gust = fg_random() * 1.0 - 0.5;
59 FG_V_gust = fg_random() * 1.0 - 0.5;
60 FG_W_gust = fg_random() * 1.0 - 0.5; */
65 /* Revision 1.7 1997/12/10 22:37:56 curt
66 /* Prepended "fg" on the name of all global structures that didn't have it yet.
67 /* i.e. "struct WEATHER {}" became "struct fgWEATHER {}"
69 * Revision 1.6 1997/08/27 03:30:38 curt
70 * Changed naming scheme of basic shared structures.
72 * Revision 1.5 1997/08/22 21:34:42 curt
73 * Doing a bit of reorganizing and house cleaning.
75 * Revision 1.4 1997/08/02 16:23:55 curt
78 * Revision 1.3 1997/07/31 22:52:41 curt
79 * Working on redoing internal coordinate systems & scenery transformations.
81 * Revision 1.2 1997/07/30 16:12:44 curt
82 * Moved fg_random routines from Util/ to Math/
84 * Revision 1.1 1997/07/19 23:03:57 curt