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flightgear/Astro/stars.h

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/**************************************************************************
* stars.h -- data structures and routines for managing and rendering stars.
*
* Written by Curtis Olson, started August 1997.
*
* Copyright (C) 1997 Curtis L. Olson - curt@infoplane.com
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* $Id$
* (Log is kept at end of this file)
**************************************************************************/
#ifndef _STARS_H
#define _STARS_H
#define FG_MAX_STARS 500
#define FG_STAR_LEVELS 4 /* how many star transitions */
#define FG_MIN_STAR_MAG 0.738750 /* magnitude of weakest star we'll display */
/* Initialize the Star Management Subsystem */
void fgStarsInit( void );
/* Draw the Stars */
void fgStarsRender( void );
extern struct OrbElements pltOrbElements[9];
extern struct fgTIME cur_time_params;
#endif /* _STARS_H */
/* $Log$
/* Revision 1.3 1998/01/22 02:59:28 curt
/* Changed #ifdef FILE_H to #ifdef _FILE_H
/*
* Revision 1.2 1998/01/19 18:40:18 curt
* Tons of little changes to clean up the code and to remove fatal errors
* when building with the c++ compiler.
*
* Revision 1.1 1998/01/07 03:16:20 curt
* Moved from .../Src/Scenery/ to .../Src/Astro/
*
* Revision 1.6 1997/10/25 03:18:29 curt
* Incorporated sun, moon, and planet position and rendering code contributed
* by Durk Talsma.
*
* Revision 1.5 1997/09/18 16:20:09 curt
* At dusk/dawn add/remove stars in stages.
*
* Revision 1.4 1997/09/05 01:36:00 curt
* Working on getting stars right.
*
* Revision 1.3 1997/08/29 17:55:28 curt
* Worked on properly aligning the stars.
*
* Revision 1.2 1997/08/27 21:32:30 curt
* Restructured view calculation code. Added stars.
*
* Revision 1.1 1997/08/27 03:34:50 curt
* Initial revision.
*
*/