1 /**************************************************************************
2 * weather.h -- 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 **************************************************************************/
36 /* holds the current weather values */
42 extern struct fgWEATHER current_weather;
45 /* Initialize the weather modeling subsystem */
46 void fgWeatherInit( void );
49 /* Update the weather parameters for the current position */
50 void fgWeatherUpdate( void );
53 /* Get the current visibility */
54 float fgWeatherGetVisibility( void );
57 /* Set the visibility and update fog parameters */
58 void fgWeatherSetVisibility( float visibility );
66 #endif /* _WEATHER_H */
70 /* Revision 1.10 1998/06/12 01:01:00 curt
71 /* Build only static libraries.
72 /* Declare memmove/memset for Sloaris.
73 /* Added support for exponetial fog, which solves for the proper density to
74 /* achieve the desired visibility range.
76 * Revision 1.9 1998/04/21 17:02:46 curt
77 * Prepairing for C++ integration.
79 * Revision 1.8 1998/01/22 02:59:44 curt
80 * Changed #ifdef FILE_H to #ifdef _FILE_H
82 * Revision 1.7 1998/01/19 18:40:41 curt
83 * Tons of little changes to clean up the code and to remove fatal errors
84 * when building with the c++ compiler.
86 * Revision 1.6 1997/12/30 22:22:47 curt
87 * Further integration of event manager.
89 * Revision 1.5 1997/12/10 22:37:56 curt
90 * Prepended "fg" on the name of all global structures that didn't have it yet.
91 * i.e. "struct WEATHER {}" became "struct fgWEATHER {}"
93 * Revision 1.4 1997/08/27 03:30:39 curt
94 * Changed naming scheme of basic shared structures.
96 * Revision 1.3 1997/08/22 21:34:43 curt
97 * Doing a bit of reorganizing and house cleaning.
99 * Revision 1.2 1997/07/23 21:52:30 curt
100 * Put comments around the text after an #endif for increased portability.
102 * Revision 1.1 1997/07/19 23:03:58 curt