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 "../Utils/fg_random.h"
32 /* Initialize the weather modeling subsystem */
33 void fgWeatherInit(void) {
36 /* Update the weather parameters for the current position */
37 void fgWeatherUpdate(double lon, double lat, double alt) {
38 struct flight_params *f;
39 f = ¤t_aircraft.flight;
41 /* Configure some wind */
42 FG_V_north_airmass = 15; /* ft/s =~ 10mph */
44 /* Add some random turbulence */
45 FG_U_gust = fg_random() * 1.0 - 0.5;
46 FG_V_gust = fg_random() * 1.0 - 0.5;
47 FG_W_gust = fg_random() * 1.0 - 0.5;
52 /* Revision 1.1 1997/07/19 23:03:57 curt