spherical_coordinates.h

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#ifndef MF_SPHERICAL_COORDINATES_H_
#define MF_SPHERICAL_COORDINATES_H_

#include "angle.h"
#include <iosfwd>
#include "../eigen.h"

namespace mf {


struct spherical_coordinates {
    float radius = 0.0f;
    angle azimuth = 0.0f;
    angle elevation = 0.0f;

    spherical_coordinates() = default;
    spherical_coordinates(const spherical_coordinates&) = default;
    spherical_coordinates(float r, angle az, angle el) :
        radius(r), azimuth(az), elevation(el) { }
    
    static spherical_coordinates from_cartesian(const Eigen::Vector3f&);
    Eigen::Vector3f to_cartesian() const;
    
    bool operator==(const spherical_coordinates&) const;
    bool operator!=(const spherical_coordinates&) const;    
    
    void invalidate() { radius = 0; }
    bool valid() const { return (radius != 0); }
    explicit operator bool () const { return valid(); }
};


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

}

#endif