Scaling2d.h

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// -*- LSST-C++ -*-
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#ifndef LSST_AFW_MATH_POLYNOMIALS_Scaling2d_h_INCLUDED
#define LSST_AFW_MATH_POLYNOMIALS_Scaling2d_h_INCLUDED

#include "lsst/geom/polynomials/Scaling1d.h"
#include "lsst/geom/Point.h"
#include "lsst/geom/Box.h"

namespace lsst { namespace geom { namespace polynomials {

class Scaling2d {
public:

    Scaling2d(Scaling1d const & x, Scaling1d const & y) noexcept : _x(x), _y(y) {}

    Scaling2d(Scaling2d const &) noexcept = default;

    Scaling2d(Scaling2d &&) noexcept = default;

    Scaling2d & operator=(Scaling2d const &) noexcept = default;

    Scaling2d & operator=(Scaling2d &&) noexcept = default;

    Scaling1d const & getX() const noexcept { return _x; }

    Scaling1d const & getY() const noexcept { return _y; }

    geom::Point2D applyForward(geom::Point2D const & p) const noexcept {
        return geom::Point2D(getX().applyForward(p.getX()), getY().applyForward(p.getY()));
    }

    geom::Point2D applyInverse(geom::Point2D const & p) const noexcept {
        return geom::Point2D(getX().applyInverse(p.getX()), getY().applyInverse(p.getY()));
    }

    Scaling2d inverted() const noexcept {
        return Scaling2d(getX().inverted(), getY().inverted());
    }

    Scaling2d then(Scaling2d const & second) const noexcept {
        return Scaling2d(getX().then(second.getX()), getY().then(second.getY()));
    }

private:
    Scaling1d _x;
    Scaling1d _y;
};

inline Scaling2d makeUnitRangeScaling2d(geom::Box2D const & box) {
    return Scaling2d(
        makeUnitRangeScaling1d(box.getMinX(), box.getMaxX()),
        makeUnitRangeScaling1d(box.getMinY(), box.getMaxY())
    );
}

}}} // namespace lsst::geom::polynomials

#endif // !LSST_AFW_MATH_POLYNOMIALS_Scaling2d_h_INCLUDED