Gnomonic.hpp

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#if !defined(GEOGRAPHICLIB_GNOMONIC_HPP)
#define GEOGRAPHICLIB_GNOMONIC_HPP 1

#include <GeographicLib/Geodesic.hpp>
#include <GeographicLib/GeodesicLine.hpp>
#include <GeographicLib/Constants.hpp>

namespace GeographicLib {

  class GEOGRAPHICLIB_EXPORT Gnomonic {
  private:
    typedef Math::real real;
    real eps0_, eps_;
    Geodesic _earth;
    real _a, _f;
    static const int numit_ = 10;
  public:

    explicit Gnomonic(const Geodesic& earth = Geodesic::WGS84());

    void Forward(real lat0, real lon0, real lat, real lon,
                 real& x, real& y, real& azi, real& rk) const;

    void Reverse(real lat0, real lon0, real x, real y,
                 real& lat, real& lon, real& azi, real& rk) const;

    void Forward(real lat0, real lon0, real lat, real lon,
                 real& x, real& y) const {
      real azi, rk;
      Forward(lat0, lon0, lat, lon, x, y, azi, rk);
    }

    void Reverse(real lat0, real lon0, real x, real y,
                 real& lat, real& lon) const {
      real azi, rk;
      Reverse(lat0, lon0, x, y, lat, lon, azi, rk);
    }


    Math::real MajorRadius() const { return _earth.MajorRadius(); }

    Math::real Flattening() const { return _earth.Flattening(); }

  };

} // namespace GeographicLib

#endif  // GEOGRAPHICLIB_GNOMONIC_HPP