-// ephemeris.hxx -- Top level class for calculating current positions of
-// astronomical objects
+/** \file ephemeris.hxx
+ * Top level class for calculating current positions of astronomical objects.
+ */
+
+// Top level interface written by Curtis Olson, started March 2000.
//
-// Written by Curtis Olson, started March 2000.
+// All the core code underneath this is written by Durk Talsma. See
+// the headers of all the other individual files for details.
//
-// Copyright (C) 2000 Curtis L. Olson - curt@flightgear.org
+// Copyright (C) 2000 Curtis L. Olson - http://www.flightgear.org/~curt
//
-// 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 library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library 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
+// This library 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.
+// Library 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.
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//
// $Id$
#ifndef _EPHEMERIS_HXX
#define _EPHEMERIS_HXX
-
-#ifdef HAVE_CONFIG_H
-# include <config.h>
-#endif
-
-#include <plib/sg.h>
-
-#include <simgear/timing/fg_time.hxx>
-
-#include "star.hxx"
-#include "moon.hxx"
-#include "mercury.hxx"
-#include "venus.hxx"
-#include "mars.hxx"
-#include "jupiter.hxx"
-#include "saturn.hxx"
-#include "uranus.hxx"
-#include "neptune.hxx"
-#include "stars.hxx"
-
-
-class FGEphemeris {
+#include <string>
+
+#include <simgear/ephemeris/star.hxx>
+#include <simgear/ephemeris/moonpos.hxx>
+#include <simgear/ephemeris/mercury.hxx>
+#include <simgear/ephemeris/venus.hxx>
+#include <simgear/ephemeris/mars.hxx>
+#include <simgear/ephemeris/jupiter.hxx>
+#include <simgear/ephemeris/saturn.hxx>
+#include <simgear/ephemeris/uranus.hxx>
+#include <simgear/ephemeris/neptune.hxx>
+#include <simgear/ephemeris/stardata.hxx>
+
+#include <simgear/math/SGMath.hxx>
+#include <simgear/misc/sg_path.hxx>
+
+
+/** Ephemeris class
+ *
+ * Written by Durk Talsma <d.talsma@direct.a2000.nl> and Curtis Olson
+ * <http://www.flightgear.org/~curt>
+ *
+ * Introduction
+ *
+ * The SGEphemeris class computes and stores the positions of the Sun,
+ * the Moon, the planets, and the brightest stars. These positions
+ * can then be used to accurately render the dominant visible items in
+ * the Earth's sky. Note, this class isn't intended for use in an
+ * interplanetary/interstellar/intergalactic type application. It is
+ * calculates everything relative to the Earth and is therefore best
+ * suited for Earth centric applications.
+ *
+ * The positions of the various astronomical objects are time
+ * dependent, so to maintain accuracy, you will need to periodically
+ * call the update() method. The SGTime class conveniently provides
+ * the two time related values you need to pass to the update()
+ * method.
+ */
+
+class SGEphemeris {
Star *our_sun;
- Moon *moon;
+ MoonPos *moon;
Mercury *mercury;
Venus *venus;
Mars *mars;
// planets[i][1] = Declination
// planets[i][2] = Magnitude
int nplanets;
- sgdVec3 planets[7];
+ SGVec3d planets[7];
- FGStars *stars;
+ SGStarData *stars;
public:
- // Constructor
- FGEphemeris( const string &path );
-
- // Destructor
- ~FGEphemeris( void );
-
- // Update (recalculate) the positions of all objects for the
- // specified time
- void update(FGTime *t, double lat);
-
- // sun
+ /**
+ * Constructor.
+ * This creates an instance of the SGEphemeris object. When
+ * calling the constructor you need to provide a path pointing to
+ * your star database file.
+ * @param path path to your star database */
+ SGEphemeris( const std::string &path );
+
+ /** Destructor */
+ ~SGEphemeris( void );
+
+ /**
+ * Update (recalculate) the positions of all objects for the
+ * specified time. The update() method requires you to pass in
+ * the current modified Julian date, the current local sidereal
+ * time, and the current latitude. The update() method is designed
+ * to be called by the host application before every frame.
+ * @param mjd modified julian date
+ * @param lst current local sidereal time
+ * @param lat current latitude
+ */
+ void update(double mjd, double lst, double lat);
+
+ /**
+ * @return a pointer to a Star class containing all the positional
+ * information for Earth's Sun.
+ */
inline Star *get_sun() const { return our_sun; }
+
+ /** @return the right ascension of the Sun. */
inline double getSunRightAscension() const {
return our_sun->getRightAscension();
}
+
+ /** @return the declination of the Sun. */
inline double getSunDeclination() const {
return our_sun->getDeclination();
}
- // moon
- inline Moon *get_moon() const { return moon; }
+ /**
+ * @return a pointer to a Moon class containing all the positional
+ * information for Earth's Moon.
+ */
+ inline MoonPos *get_moon() const { return moon; }
+
+ /** @return the right ascension of the Moon. */
inline double getMoonRightAscension() const {
return moon->getRightAscension();
}
+
+ /** @return the declination of the Moon. */
inline double getMoonDeclination() const {
return moon->getDeclination();
}
- // planets
+ /** @return the numbers of defined planets. */
inline int getNumPlanets() const { return nplanets; }
- inline sgdVec3 *getPlanets() { return planets; }
- // planets
+ /**
+ * Returns a pointer to an array of planet data in sgdVec3
+ * format. (See plib.sourceforge.net for information on plib and
+ * the ``sg'' package.) An sgdVec3 is a 3 element double
+ * array. The first element is the right ascension of the planet,
+ * the second is the declination, and the third is the magnitude.
+ * @return planets array
+ */
+ inline SGVec3d *getPlanets() { return planets; }
+
+ /** @return the numbers of defined stars. */
inline int getNumStars() const { return stars->getNumStars(); }
- inline sgdVec3 *getStars() { return stars->getStars(); }
+
+ /**
+ * Returns a pointer to an array of star data in sgdVec3
+ * format. An The first element of the sgdVec3 is the right
+ * ascension of the planet, the second is the declination, and the
+ * third is the magnitude.
+ * @returns star array
+ */
+ inline SGVec3d *getStars() { return stars->getStars(); }
};
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