ScaledBasis2d.h

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// -*- LSST-C++ -*-
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#ifndef LSST_AFW_MATH_POLYNOMIALS_ScaledBasis2d_h_INCLUDED
#define LSST_AFW_MATH_POLYNOMIALS_ScaledBasis2d_h_INCLUDED
 
#include "lsst/geom/polynomials/Scaling2d.h"
 
namespace lsst { namespace geom { namespace polynomials {
 
template <typename Basis>
class Function2d;

template <typename Nested>
class ScaledBasis2d {
public:

    using Function = Function2d<ScaledBasis2d>;

    using Scaled = ScaledBasis2d<Nested>;

    using Workspace = typename Nested::Workspace;

    using IndexRange = typename Nested::IndexRange;

    explicit ScaledBasis2d(Nested const & nested, Scaling2d const & scaling) :
        _nested(nested),
        _scaling(scaling)
    {}

    ScaledBasis2d(std::size_t order, Box2D const & box) :
        _nested(order),
        _scaling(makeUnitRangeScaling2d(box))
    {}

    ScaledBasis2d(ScaledBasis2d const &) = default;

    ScaledBasis2d(ScaledBasis2d &&) = default;

    ScaledBasis2d & operator=(ScaledBasis2d const &) = default;

    ScaledBasis2d & operator=(ScaledBasis2d &&) = default;

    Nested const & getNested() const noexcept { return _nested; }

    Scaling2d const & getScaling() const noexcept { return _scaling; }

    std::size_t getOrder() const { return getNested().getOrder(); }

    std::size_t size() const { return getNested().size(); }

    Scaled scaled(Scaling2d const & first) const {
        return getNested().scaled(first.then(getScaling()));
    }

    int index(int x, int y) const { return getNested().index(x, y); }

    IndexRange getIndices() const { return getNested().getIndices(); }

    Workspace makeWorkspace() const { return getNested().makeWorkspace();}

    template <typename Vector>
    double sumWith(geom::Point2D const & point, Vector const & coefficients,
                   SumMode mode=SumMode::FAST) const {
        return getNested().sumWith(getScaling().applyForward(point), coefficients, mode);
    }

    template <typename Vector>
    double sumWith(geom::Point2D const & point, Vector const & coefficients,
                   Workspace & workspace, SumMode mode=SumMode::FAST) const {
        return getNested().sumWith(getScaling().applyForward(point), coefficients, workspace, mode);
    }

    template <typename Vector>
    void fill(geom::Point2D const & point, Vector && basis) const {
        return getNested().fill(getScaling().applyForward(point),
                                std::forward<Vector>(basis));
    }

    template <typename Vector>
    void fill(geom::Point2D const & point, Vector && basis, Workspace & workspace) const {
        return getNested().fill(getScaling().applyForward(point),
                                std::forward<Vector>(basis),
                                workspace);
    }
 
private:
    Nested _nested;
    Scaling2d _scaling;
};
 
}}} // namespace lsst::geom::polynomials
 
#endif // !LSST_AFW_MATH_POLYNOMIALS_ScaledBasis2d_h_INCLUDED