/***************************************************************************
                          kssun.h  -  K Desktop Planetarium
                             -------------------
    begin                : Sun Jan 29 2002
    copyright            : (C) 2002 by Mark Hollomon
    email                : mhh@mindspring.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.                                   *
 *                                                                         *
 ***************************************************************************/

#ifndef KSSUN_H_
#define KSSUN_H_

#include <QString>
#include "ksplanet.h"

/** @class KSSun
	*Child class of KSPlanetBase; encapsulates information about the Sun.
	*@short Provides necessary information about the Sun.
	*@author Mark Hollomon
	*@version 1.0
	*/

class KSSun : public KSPlanet
{
  public:
    /** Constructor.  Defines constants needed by findPosition().
        	*Sets Ecliptic coordinates appropriate for J2000.
        	*@param kd pointer to KStarsData object
        	*/
    KSSun();

    KSSun *clone() const Q_DECL_OVERRIDE;
    SkyObject::UID getUID() const Q_DECL_OVERRIDE;

    /** Destructor (empty)
        	*/
    virtual ~KSSun() {}

    /** Read orbital data from disk
        	*@note reimplemented from KSPlanet
        	*@note we actually read Earth's orbital data.  The Sun's geocentric
        	*ecliptic coordinates are by definition exactly the opposite of the
        	*Earth's heliocentric ecliptic coordinates.
        	*/
    bool loadData() Q_DECL_OVERRIDE;

  protected:
    /** Determine geocentric RA, Dec coordinates for the Epoch given in the argument.
        	*@p Epoch current Julian Date
        	*@p Earth pointer to earth object
        	*/
    bool findGeocentricPosition(const KSNumbers *num, const KSPlanetBase *Earth = nullptr) Q_DECL_OVERRIDE;

  private:
    void findMagnitude(const KSNumbers *) Q_DECL_OVERRIDE;
};
long double equinox(int year, int d, int m, int angle);

#endif
