lsst::shapelet::MatrixBuilderFactory< T > Class Template Reference

A factory class for MatrixBuilder, providing more control over workspace memory. More...

#include <MatrixBuilder.h>

Public Types
typedef MatrixBuilderWorkspace< T >	Workspace
	Associated workspace class.
typedef MatrixBuilder< T >	Builder
	Associated builder class.

Public Member Functions
	MatrixBuilderFactory (ndarray::Array< T const, 1, 1 > const &x, ndarray::Array< T const, 1, 1 > const &y, int order)
	Create a MatrixBuilder that evaluates a simple non-compound shapelet basis.
	MatrixBuilderFactory (ndarray::Array< T const, 1, 1 > const &x, ndarray::Array< T const, 1, 1 > const &y, int order, ShapeletFunction const &psf)
	Create a MatrixBuilder that evaluates a simple non-compound shapelet basis after convolving it with a ShapeletFunction.
	MatrixBuilderFactory (ndarray::Array< T const, 1, 1 > const &x, ndarray::Array< T const, 1, 1 > const &y, MultiShapeletBasis const &basis)
	Create a MatrixBuilder that evaluates a MultiShapeletBasis object.
	MatrixBuilderFactory (ndarray::Array< T const, 1, 1 > const &x, ndarray::Array< T const, 1, 1 > const &y, MultiShapeletBasis const &basis, MultiShapeletFunction const &psf)
	Create a MatrixBuilder that evaluates a MultiShapeletBasis object after convolving it with a MultiShapeletFunction.
int	getDataSize () const
	Return the number of data points.
int	getBasisSize () const
	Return the number of basis elements.
int	computeWorkspace () const
	Return the size of the workspace needed for this MatrixBuilder, in elements of T.
MatrixBuilder< T >	operator() () const
	Return a new MatrixBuilder with internal, unshared workspace.
MatrixBuilder< T >	operator() (Workspace &workspace) const
	Return a new MatrixBuilder using the given workspace.

Detailed Description

template<typename T>
class lsst::shapelet::MatrixBuilderFactory< T >

A factory class for MatrixBuilder, providing more control over workspace memory.

To allocate workspace manually for a MatrixBuilder, we use the following pattern:;

MatrixBuilderFactory<T> factory(...);
MatrixBuilderWorkspace<T> workspace(factory.computeWorkspace());
MatrixBuilder<T> builder = factory(workspace);

Because we aren't doing anything special with the workspace, however, this is actually exactly equivalent to just constructing the MatrixBuilder directly, i.e.:

MatrixBuilder<T> builder(...);

A more interesting case is if we want to use the same workspace for a pair of MatrixBuilders:

MatrixBuilderFactory<T> factory1(...);
MatrixBuilderFactory<T> factory2(...);
MatrixBuilderWorkspace<T> workspace1(
   std::max(factory1.computeWorkspace(), factory2.computeWorkspace())
);
MatrixBuilderWorkspace<T> workspace2(workspace1);
MatrixBuilder<T> builder1 = factory1(workspace1);
MatrixBuilder<T> builder2 = factory2(workspace2);

Definition at line 265 of file MatrixBuilder.h.

Member Typedef Documentation

Builder

template<typename T>

typedef MatrixBuilder<T> lsst::shapelet::MatrixBuilderFactory< T >::Builder

Associated builder class.

Definition at line 269 of file MatrixBuilder.h.

Workspace

template<typename T>

typedef MatrixBuilderWorkspace<T> lsst::shapelet::MatrixBuilderFactory< T >::Workspace

Associated workspace class.

Definition at line 268 of file MatrixBuilder.h.

Constructor & Destructor Documentation

MatrixBuilderFactory() [1/4]

template<typename T>

lsst::shapelet::MatrixBuilderFactory< T >::MatrixBuilderFactory	(	ndarray::Array< T const, 1, 1 > const &	x,
		ndarray::Array< T const, 1, 1 > const &	y,
		int	order )

Create a MatrixBuilder that evaluates a simple non-compound shapelet basis.

Parameters

[in]	x	column positions at which the basis should be evaluated.
[in]	y	row positions at which the basis should be evaluated (same size as x).
[in]	order	order of the shapelet basis

MatrixBuilderFactory() [2/4]

template<typename T>

lsst::shapelet::MatrixBuilderFactory< T >::MatrixBuilderFactory	(	ndarray::Array< T const, 1, 1 > const &	x,
		ndarray::Array< T const, 1, 1 > const &	y,
		int	order,
		ShapeletFunction const &	psf )

Create a MatrixBuilder that evaluates a simple non-compound shapelet basis after convolving it with a ShapeletFunction.

Parameters

[in]	x	column positions at which the basis should be evaluated.
[in]	y	row positions at which the basis should be evaluated (same size as x).
[in]	order	order of the shapelet basis
[in]	psf	function to convolve the basis with

MatrixBuilderFactory() [3/4]

template<typename T>

lsst::shapelet::MatrixBuilderFactory< T >::MatrixBuilderFactory	(	ndarray::Array< T const, 1, 1 > const &	x,
		ndarray::Array< T const, 1, 1 > const &	y,
		MultiShapeletBasis const &	basis )

Create a MatrixBuilder that evaluates a MultiShapeletBasis object.

Parameters

[in]	x	column positions at which the basis should be evaluated.
[in]	y	row positions at which the basis should be evaluated (same size as x).
[in]	basis	basis object defining the functions the matrix evaluates

MatrixBuilderFactory() [4/4]

template<typename T>

lsst::shapelet::MatrixBuilderFactory< T >::MatrixBuilderFactory	(	ndarray::Array< T const, 1, 1 > const &	x,
		ndarray::Array< T const, 1, 1 > const &	y,
		MultiShapeletBasis const &	basis,
		MultiShapeletFunction const &	psf )

Create a MatrixBuilder that evaluates a MultiShapeletBasis object after convolving it with a MultiShapeletFunction.

Parameters

[in]	x	column positions at which the basis should be evaluated.
[in]	y	row positions at which the basis should be evaluated (same size as x).
[in]	basis	basis object defining the functions the matrix evaluates
[in]	psf	function to convolve the basis with

Member Function Documentation

computeWorkspace()

template<typename T>

int lsst::shapelet::MatrixBuilderFactory< T >::computeWorkspace

(

)

const

Return the size of the workspace needed for this MatrixBuilder, in elements of T.

getBasisSize()

template<typename T>

int lsst::shapelet::MatrixBuilderFactory< T >::getBasisSize

(

)

const

Return the number of basis elements.

getDataSize()

template<typename T>

int lsst::shapelet::MatrixBuilderFactory< T >::getDataSize

(

)

const

Return the number of data points.

operator()() [1/2]

template<typename T>

MatrixBuilder< T > lsst::shapelet::MatrixBuilderFactory< T >::operator()

(

)

const

Return a new MatrixBuilder with internal, unshared workspace.

operator()() [2/2]

template<typename T>

MatrixBuilder< T > lsst::shapelet::MatrixBuilderFactory< T >::operator()

(

Workspace &

workspace

)

const

Return a new MatrixBuilder using the given workspace.

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

• /j/snowflake/release/lsstsw/stack/lsst-scipipe-12.1.0/Linux/shapelet/g47891489e3+6dc8069a4c/include/lsst/shapelet/MatrixBuilder.h