91 lines
2.7 KiB
C
91 lines
2.7 KiB
C
/**************************************************************************
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* weather.c -- routines to model weather
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*
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* Written by Curtis Olson, started July 1997.
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*
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* Copyright (C) 1997 Curtis L. Olson - curt@infoplane.com
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* $Id$
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* (Log is kept at end of this file)
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**************************************************************************/
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#include "weather.h"
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#include "../Aircraft/aircraft.h"
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#include "../Math/fg_random.h"
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/* This is a record containing current weather info */
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struct fgWEATHER current_weather;
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/* Initialize the weather modeling subsystem */
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void fgWeatherInit(void) {
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struct fgWEATHER *w;
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w = ¤t_weather;
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/* Configure some wind */
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/* FG_V_north_airmass = 15; */ /* ft/s =~ 10mph */
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w->visibility = 45000.0; /* in meters */
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}
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/* Update the weather parameters for the current position */
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void fgWeatherUpdate(double lon, double lat, double alt) {
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struct fgFLIGHT *f;
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struct fgWEATHER *w;
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f = ¤t_aircraft.flight;
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w = ¤t_weather;
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/* Add some random turbulence */
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/* FG_U_gust = fg_random() * 1.0 - 0.5;
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FG_V_gust = fg_random() * 1.0 - 0.5;
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FG_W_gust = fg_random() * 1.0 - 0.5; */
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}
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/* $Log$
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/* Revision 1.8 1997/12/11 04:43:58 curt
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/* Fixed sun vector and lighting problems. I thing the moon is now lit
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/* correctly.
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/*
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* Revision 1.7 1997/12/10 22:37:56 curt
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* Prepended "fg" on the name of all global structures that didn't have it yet.
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* i.e. "struct WEATHER {}" became "struct fgWEATHER {}"
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*
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* Revision 1.6 1997/08/27 03:30:38 curt
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* Changed naming scheme of basic shared structures.
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*
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* Revision 1.5 1997/08/22 21:34:42 curt
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* Doing a bit of reorganizing and house cleaning.
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*
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* Revision 1.4 1997/08/02 16:23:55 curt
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* Misc. tweaks.
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*
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* Revision 1.3 1997/07/31 22:52:41 curt
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* Working on redoing internal coordinate systems & scenery transformations.
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*
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* Revision 1.2 1997/07/30 16:12:44 curt
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* Moved fg_random routines from Util/ to Math/
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*
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* Revision 1.1 1997/07/19 23:03:57 curt
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* Initial revision.
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*
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*/
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