LonLat.h

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/*
 * LSST Data Management System
 * Copyright 2014-2015 AURA/LSST.
 *
 * This product includes software developed by the
 * LSST Project (http://www.lsst.org/).
 *
 * 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 3 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
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the LSST License Statement and
 * the GNU General Public License along with this program.  If not,
 * see <https://www.lsstcorp.org/LegalNotices/>.
 */

#ifndef LSST_SPHGEOM_LONLAT_H_
#define LSST_SPHGEOM_LONLAT_H_


#include <iosfwd>
#include <stdexcept>

#include "NormalizedAngle.h"


namespace lsst{
namespace sphgeom {

class Vector3d;

class LonLat {
public:
    static LonLat fromDegrees(double lon, double lat) {
        return LonLat(NormalizedAngle::fromDegrees(lon),
                      Angle::fromDegrees(lat));
    }

    static LonLat fromRadians(double lon, double lat) {
        return LonLat(NormalizedAngle::fromRadians(lon),
                      Angle::fromRadians(lat));
    }

    static Angle latitudeOf(Vector3d const & v);

    static NormalizedAngle longitudeOf(Vector3d const & v);

    LonLat() {}

    LonLat(NormalizedAngle lon, Angle lat);

    LonLat(Vector3d const & v);

    bool operator==(LonLat const & p) const {
        return _lon == p._lon && _lat == p._lat;
    }

    bool operator!=(LonLat const & p) const {
        return _lon != p._lon || _lat != p._lat;
    }

    NormalizedAngle getLon() const { return _lon; }

    Angle getLat() const { return _lat; }

private:
    void _enforceInvariants();

    NormalizedAngle _lon;
    Angle _lat;
};

std::ostream & operator<<(std::ostream &, LonLat const &);

}} // namespace lsst::sphgeom

#endif // LSST_SPHGEOM_LONLAT_H_