1 // weather.hxx -- routines to model weather
3 // Written by Curtis Olson, started July 1997.
5 // Copyright (C) 1997 Curtis L. Olson - curt@me.umn.edu
7 // This program is free software; you can redistribute it and/or
8 // modify it under the terms of the GNU General Public License as
9 // published by the Free Software Foundation; either version 2 of the
10 // License, or (at your option) any later version.
12 // This program is distributed in the hope that it will be useful, but
13 // WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 // General Public License for more details.
17 // You should have received a copy of the GNU General Public License
18 // along with this program; if not, write to the Free Software
19 // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 // (Log is kept at end of this file)
34 // holds the current weather values
40 extern struct fgWEATHER current_weather;
43 // Initialize the weather modeling subsystem
44 void fgWeatherInit( void );
47 // Update the weather parameters for the current position
48 void fgWeatherUpdate( void );
51 // Get the current visibility
52 float fgWeatherGetVisibility( void );
55 // Set the visibility and update fog parameters
56 void fgWeatherSetVisibility( float visibility );
68 // Revision 1.1 1998/10/17 01:34:37 curt
71 // Revision 1.10 1998/06/12 01:01:00 curt
72 // Build only static libraries.
73 // Declare memmove/memset for Sloaris.
74 // Added support for exponetial fog, which solves for the proper density to
75 // achieve the desired visibility range.
77 // Revision 1.9 1998/04/21 17:02:46 curt
78 // Prepairing for C++ integration.
80 // Revision 1.8 1998/01/22 02:59:44 curt
81 // Changed #ifdef FILE_H to #ifdef _FILE_H
83 // Revision 1.7 1998/01/19 18:40:41 curt
84 // Tons of little changes to clean up the code and to remove fatal errors
85 // when building with the c++ compiler.
87 // Revision 1.6 1997/12/30 22:22:47 curt
88 // Further integration of event manager.
90 // Revision 1.5 1997/12/10 22:37:56 curt
91 // Prepended "fg" on the name of all global structures that didn't have it yet.
92 // i.e. "struct WEATHER {}" became "struct fgWEATHER {}"
94 // Revision 1.4 1997/08/27 03:30:39 curt
95 // Changed naming scheme of basic shared structures.
97 // Revision 1.3 1997/08/22 21:34:43 curt
98 // Doing a bit of reorganizing and house cleaning.
100 // Revision 1.2 1997/07/23 21:52:30 curt
101 // Put comments around the text after an #endif for increased portability.
103 // Revision 1.1 1997/07/19 23:03:58 curt