lsst::afw::geom::ellipses::Ellipse::Transformer Class Reference

A temporary-only expression object for ellipse transformations. More...

#include <Transformer.h>

Public Types
using	DerivativeMatrix = Eigen::Matrix< double, 5, 5 >
	Matrix type for derivative with respect to input ellipse parameters. More...
using	TransformDerivativeMatrix = Eigen::Matrix< double, 5, 6 >
	Matrix type for derivative with respect to transform parameters. More...

Public Member Functions
	Transformer (Ellipse &input_, lsst::geom::AffineTransform const &transform_)
	Standard constructor. More...
std::shared_ptr< Ellipse >	copy () const
	Return a new transformed ellipse. More...
void	inPlace ()
	Transform the ellipse in-place. More...
void	apply (Ellipse &other) const
DerivativeMatrix	d () const
	Return the derivative of transform output ellipse with respect to input ellipse. More...
TransformDerivativeMatrix	dTransform () const
	Return the derivative of transform output ellipse with respect to transform parameters. More...

Public Attributes
Ellipse &	input
	input ellipse to be transformed More...
lsst::geom::AffineTransform const &	transform
	transform object More...

Detailed Description

A temporary-only expression object for ellipse transformations.

Transformer simply provides a clean syntax for transform-related operations, including in-place and new-object transformations, derivatives of the transformations, and implicit conversion to an auto_ptr to a new transformed ellipse.

Definition at line 86 of file Transformer.h.

Member Typedef Documentation

DerivativeMatrix

using lsst::afw::geom::ellipses::Ellipse::Transformer::DerivativeMatrix = Eigen::Matrix<double, 5, 5>

Matrix type for derivative with respect to input ellipse parameters.

Definition at line 89 of file Transformer.h.

TransformDerivativeMatrix

using lsst::afw::geom::ellipses::Ellipse::Transformer::TransformDerivativeMatrix = Eigen::Matrix<double, 5, 6>

Matrix type for derivative with respect to transform parameters.

Definition at line 92 of file Transformer.h.

Constructor & Destructor Documentation

Transformer()

lsst::afw::geom::ellipses::Ellipse::Transformer::Transformer ( Ellipse &  input_, lsst::geom::AffineTransform const &  transform_  )

inline

Standard constructor.

Definition at line 95 of file Transformer.h.

            : input(input_), transform(transform_) {}

Member Function Documentation

apply()

void lsst::afw::geom::ellipses::Ellipse::Transformer::apply

(

Ellipse &

other

)

const

copy()

std::shared_ptr< Ellipse > lsst::afw::geom::ellipses::Ellipse::Transformer::copy

(

)

const

Return a new transformed ellipse.

Definition at line 97 of file Transformer.cc.

                                                      {
    std::shared_ptr<Ellipse> r = std::make_shared<Ellipse>(
            input.getCore().transform(transform.getLinear()).copy(), transform(input.getCenter()));
    return r;
}

d()

Ellipse::Transformer::DerivativeMatrix lsst::afw::geom::ellipses::Ellipse::Transformer::d

(

)

const

Return the derivative of transform output ellipse with respect to input ellipse.

Definition at line 108 of file Transformer.cc.

                                                               {
    DerivativeMatrix r = DerivativeMatrix::Zero();
    r.block<2, 2>(3, 3) = transform.getLinear().getMatrix();
    r.block<3, 3>(0, 0) = input.getCore().transform(transform.getLinear()).d();
    return r;
}

dTransform()

Ellipse::Transformer::TransformDerivativeMatrix lsst::afw::geom::ellipses::Ellipse::Transformer::dTransform

(

)

const

Return the derivative of transform output ellipse with respect to transform parameters.

Definition at line 115 of file Transformer.cc.

                                                                                 {
    TransformDerivativeMatrix r = TransformDerivativeMatrix::Zero();
    r.block<2, 6>(3, 0) = transform.dTransform(input.getCenter());
    r.block<3, 4>(0, 0) = input.getCore().transform(transform.getLinear()).dTransform();
    return r;
}

inPlace()

void lsst::afw::geom::ellipses::Ellipse::Transformer::inPlace

(

)

Transform the ellipse in-place.

Definition at line 103 of file Transformer.cc.

                                 {
    input.setCenter(transform(input.getCenter()));
    input.getCore().transform(transform.getLinear()).inPlace();
}

Member Data Documentation

input

Ellipse& lsst::afw::geom::ellipses::Ellipse::Transformer::input

input ellipse to be transformed

Definition at line 112 of file Transformer.h.

transform

lsst::geom::AffineTransform const& lsst::afw::geom::ellipses::Ellipse::Transformer::transform

transform object

Definition at line 113 of file Transformer.h.

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The documentation for this class was generated from the following files:

• /j/snowflake/release/lsstsw/stack/lsst-scipipe-0.7.0/Linux64/afw/22.0.1-42-gca6935d93+ba5e5ca3eb/include/lsst/afw/geom/ellipses/Transformer.h
• /j/snowflake/release/lsstsw/stack/lsst-scipipe-0.7.0/Linux64/afw/22.0.1-42-gca6935d93+ba5e5ca3eb/src/geom/ellipses/Transformer.cc