Transformer.h

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// -*- lsst-c++ -*-

/*
 * LSST Data Management System
 * Copyright 2008, 2009, 2010 LSST Corporation.
 *
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#ifndef LSST_AFW_GEOM_ELLIPSES_Transformer_h_INCLUDED
#define LSST_AFW_GEOM_ELLIPSES_Transformer_h_INCLUDED

#include "lsst/afw/geom/ellipses/Ellipse.h"
#include "lsst/afw/geom/AffineTransform.h"

namespace lsst { namespace afw { namespace geom { namespace ellipses {

class BaseCore::Transformer {
public:

    typedef Eigen::Matrix3d DerivativeMatrix;

    typedef Eigen::Matrix<double,3,4> TransformDerivativeMatrix;

    Transformer(BaseCore & input_, LinearTransform const & transform_) :
        input(input_), transform(transform_) {}

    BaseCore::Ptr copy() const;

    void inPlace();

    void apply(BaseCore & result) const;

    DerivativeMatrix d() const;

    TransformDerivativeMatrix dTransform() const;

    BaseCore & input; 
    LinearTransform const & transform; 

};

class Ellipse::Transformer {
public:

    typedef Eigen::Matrix<double,5,5> DerivativeMatrix;

    typedef Eigen::Matrix<double,5,6> TransformDerivativeMatrix;

    Transformer(Ellipse & input_, AffineTransform const & transform_) :
        input(input_), transform(transform_) {}

    Ellipse::Ptr copy() const;

    void inPlace();

    void apply(Ellipse & other) const;

    DerivativeMatrix d() const;

    TransformDerivativeMatrix dTransform() const;

    Ellipse & input; 
    AffineTransform const & transform; 
};

inline BaseCore::Transformer BaseCore::transform(LinearTransform const & transform) {
    return BaseCore::Transformer(*this,transform);
}

inline BaseCore::Transformer const BaseCore::transform(LinearTransform const & transform) const {
    return BaseCore::Transformer(const_cast<BaseCore &>(*this),transform);
}

inline Ellipse::Transformer Ellipse::transform(AffineTransform const & transform) {
    return Ellipse::Transformer(*this,transform);
}

inline Ellipse::Transformer const Ellipse::transform(AffineTransform const & transform) const {
    return Ellipse::Transformer(const_cast<Ellipse &>(*this),transform);
}

inline Ellipse::Ellipse(Ellipse::Transformer const & other) :
    _core(other.input.getCore().transform(other.transform.getLinear()).copy()),
    _center(other.transform(other.input.getCenter()))
{}

}}}} // namespace lsst::afw::geom::ellipses

#endif // !LSST_AFW_GEOM_ELLIPSES_Transformer_h_INCLUDED