6e62228c1d
The functions fgSunPositionGST() and fgTimeSecondsUntilSunAngle() have been renamed to fgBodyPositionGST() and fgBodyPositionGST() respectively, and both require a new char argument specifying the body of interest. This allows the position of all solar system bodies to be calculated from the aircraft frame of reference.
65 lines
2.3 KiB
C++
65 lines
2.3 KiB
C++
/*
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* bodysolver.hxx - given a location on earth and a time of day/date,
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* find the number of seconds to various solar system body
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* positions.
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*
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* Written by Curtis Olson, started September 2003.
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*
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* Copyright (C) 2003 Curtis L. Olson - http://www.flightgear.org/~curt
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* $Id$
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*/
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#ifndef _BODYSOLVER_HXX
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#define _BODYSOLVER_HXX
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#ifndef __cplusplus
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# error This library requires C++
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#endif
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#include <simgear/compiler.h>
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#include <ctime>
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class SGGeod;
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/**
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* Given the current unix time in seconds, calculate seconds to the
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* specified solar system body angle (relative to straight up.) Also
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* specify if we want the angle while the body is ascending or descending.
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* For instance noon is when the sun angle is 0 (or the closest it can
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* get.) Dusk is when the sun angle is 90 and descending. Dawn is
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* when the sun angle is 90 and ascending.
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*/
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time_t fgTimeSecondsUntilBodyAngle( time_t cur_time,
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const SGGeod& loc,
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double target_angle_deg,
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bool ascending,
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const char *body );
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/**
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* given a particular time expressed in side real time at prime
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* meridian (GST), compute position on the earth (lat, lon) such that
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* solar system body is directly overhead. (lat, lon are reported in
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* radians)
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*/
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void fgBodyPositionGST(double gst, double *lon, double *lat, const char *body);
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#endif /* _BODYSOLVER_HXX */
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