1 /**************************************************************************
2 * stars.h -- data structures and routines for managing and rendering stars.
4 * Written by Curtis Olson, started August 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 **************************************************************************/
31 #define FG_MAX_STARS 500
32 #define FG_STAR_LEVELS 4 /* how many star transitions */
33 #define FG_MIN_STAR_MAG 0.738750 /* magnitude of weakest star we'll display */
35 /* Initialize the Star Management Subsystem */
36 void fgStarsInit( void );
39 void fgStarsRender( void );
40 extern struct OrbElements pltOrbElements[9];
41 extern struct fgTIME cur_time_params;
47 /* Revision 1.2 1998/01/19 18:40:18 curt
48 /* Tons of little changes to clean up the code and to remove fatal errors
49 /* when building with the c++ compiler.
51 * Revision 1.1 1998/01/07 03:16:20 curt
52 * Moved from .../Src/Scenery/ to .../Src/Astro/
54 * Revision 1.6 1997/10/25 03:18:29 curt
55 * Incorporated sun, moon, and planet position and rendering code contributed
58 * Revision 1.5 1997/09/18 16:20:09 curt
59 * At dusk/dawn add/remove stars in stages.
61 * Revision 1.4 1997/09/05 01:36:00 curt
62 * Working on getting stars right.
64 * Revision 1.3 1997/08/29 17:55:28 curt
65 * Worked on properly aligning the stars.
67 * Revision 1.2 1997/08/27 21:32:30 curt
68 * Restructured view calculation code. Added stars.
70 * Revision 1.1 1997/08/27 03:34:50 curt