1997-08-01 15:27:56 +00:00
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/*
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1998-04-25 20:24:00 +00:00
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* sunpos.hxx (taken from XEarth)
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1997-08-01 15:27:56 +00:00
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* kirk johnson
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* july 1993
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*
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* code for calculating the position on the earth's surface for which
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* the sun is directly overhead (adapted from _practical astronomy
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* with your calculator, third edition_, peter duffett-smith,
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* cambridge university press, 1988.)
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*
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* RCS $Id$
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*
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* Copyright (C) 1989, 1990, 1993, 1994, 1995 Kirk Lauritz Johnson
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*
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* Parts of the source code (as marked) are:
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* Copyright (C) 1989, 1990, 1991 by Jim Frost
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* Copyright (C) 1992 by Jamie Zawinski <jwz@lucid.com>
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*
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* Permission to use, copy, modify and freely distribute xearth for
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* non-commercial and not-for-profit purposes is hereby granted
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* without fee, provided that both the above copyright notice and this
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* permission notice appear in all copies and in supporting
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* documentation.
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*
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* The author makes no representations about the suitability of this
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* software for any purpose. It is provided "as is" without express or
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* implied warranty.
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*
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* THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS,
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, INDIRECT
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* OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
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* NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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1998-04-22 13:24:04 +00:00
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#ifndef _SUNPOS_HXX
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#define _SUNPOS_HXX
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1997-08-01 15:27:56 +00:00
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1998-04-22 13:24:04 +00:00
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#ifndef __cplusplus
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# error This library requires C++
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1998-04-21 17:01:43 +00:00
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#endif
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1999-01-07 20:25:32 +00:00
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#include "Include/compiler.h"
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#ifdef FG_HAVE_STD_INCLUDES
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# include <ctime>
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#else
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# include <time.h>
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#endif
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1997-08-01 15:27:56 +00:00
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1997-08-13 20:23:49 +00:00
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/* update the cur_time_params structure with the current sun position */
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1998-01-19 18:40:15 +00:00
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void fgUpdateSunPos( void );
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1997-08-01 15:27:56 +00:00
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1999-03-22 02:08:05 +00:00
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/* update the cur_time_params structure with the current moon position */
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void fgUpdateMoonPos( void );
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1997-08-01 15:27:56 +00:00
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void fgSunPosition(time_t ssue, double *lon, double *lat);
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1998-01-22 02:59:23 +00:00
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#endif /* _SUNPOS_H */
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