position.h

#ifndef POSITION_H_LOADED
#define POSITION_H_LOADED 1

#if PROVARINO
#include <ostream>
#endif

#include "astrotime.h"

class Position {
 public:
    enum System {
        _Natural,
        TopoPolar,
        AzAlt,
        EqPolar,
        HADec,
        RADec,
        Geog,
        Velocity,
        _Null,
    };

 private:
    double lon_;
    double lat_;
    System system_;
    double obs_lat_;
    double obs_lmst_;

 public:

    Position();
    Position(double lon, double lat,
             System system,
             System into_system=_Natural);

    double lon(void) const { return lon_; }

    double lat(void) const { return lat_; }

    System system(void) const { return system_; }

    static Position get_null(void) { return Position(0, 0, _Null); }
    bool is_null_p(void) const { return system_ == _Null; }

    void set_observatory(const Position&);
    void set_reftime(const AstroTime&);
    Position to_system(System into_system) const;
};


#if PROVARINO
std::ostream& operator<<(std::ostream& strm, const Position& pos);
#endif

#endif /* POSITION_H_LOADED */