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 /* Initialize the weather modeling subsystem */
33 void fgWeatherInit(void) {
34 struct weather_params *w;
38 /* Configure some wind */
39 /* FG_V_north_airmass = 15; */ /* ft/s =~ 10mph */
41 w->visibility = 60000.0; /* meters = 60km */
45 /* Update the weather parameters for the current position */
46 void fgWeatherUpdate(double lon, double lat, double alt) {
47 struct flight_params *f;
48 struct weather_params *w;
50 f = ¤t_aircraft.flight;
53 /* Add some random turbulence */
54 /* FG_U_gust = fg_random() * 1.0 - 0.5;
55 FG_V_gust = fg_random() * 1.0 - 0.5;
56 FG_W_gust = fg_random() * 1.0 - 0.5; */
61 /* Revision 1.5 1997/08/22 21:34:42 curt
62 /* Doing a bit of reorganizing and house cleaning.
64 * Revision 1.4 1997/08/02 16:23:55 curt
67 * Revision 1.3 1997/07/31 22:52:41 curt
68 * Working on redoing internal coordinate systems & scenery transformations.
70 * Revision 1.2 1997/07/30 16:12:44 curt
71 * Moved fg_random routines from Util/ to Math/
73 * Revision 1.1 1997/07/19 23:03:57 curt