casa::AxesMapping Class Reference

Info about mapping array axes to another order. More...

#include <AxesMapping.h>

List of all members.

Public Member Functions
	AxesMapping ()
	The default constructor creates empty maps.
	AxesMapping (const IPosition &oldToNew)
	Construct it with the mapping from old to new axes order.
	AxesMapping (const AxesMapping &other)
	Copy constructor (copy semantics).
	~AxesMapping ()
AxesMapping &	operator= (const AxesMapping &other)
	Assignment (copy semantics).
Bool	isRemoved () const
	Are axes removed?
Bool	isReordered () const
	Is the axes order reordered?
const IPosition &	getToNew () const
	Get the mapping of old->new.
const IPosition &	getToOld () const
	Get the mapping of new->old.
IPosition	posToNew (const IPosition &pos) const
	Map an old position to the new one.
IPosition	posToOld (const IPosition &pos) const
	Map a new position or shape to the old one.
IPosition	shapeToNew (const IPosition &shape) const
	Map an old shape to the new one.
IPosition	shapeToOld (const IPosition &shape) const
	Map a new position or shape to the old one.
Slicer	slicerToNew (const Slicer &slicer) const
	Map an old shape to the new one.
Slicer	slicerToOld (const Slicer &slicer) const
	Map a new position or shape to the old one.
Private Attributes
IPosition	itsToNew
IPosition	itsToOld
Bool	itsRemoved
Bool	itsReordered

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Detailed Description

Info about mapping array axes to another order.

Intended use:

Internal

Review Status

Date Reviewed:

yyyy/mm/dd

Test programs:

tAxesSpecifier

Prerequisite

• IPosition
• AxesSpecifier

Synopsis

AxesMapping holds the information about mapping axes to another order. It can be constructed by AxesSpecifier by applying a shape to the axes specification.
AxesMapping is thereafter used to map positions, shapes, and slices to the new axes or backwards.
Caution: Shapes and positions are both represented by class IPosition; However, they have to be treated differently in this class, because removed axes for a position have value 0, while for a shape they have value 1; Hence there are different functions for them and the user has to take care that the correct function is called;

Example

Motivation

The class encapsulates the mapping functionality. It is meant as a helper class for SubLattice .

Definition at line 87 of file AxesMapping.h.

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Constructor & Destructor Documentation

casa::AxesMapping::AxesMapping

(

)

The default constructor creates empty maps.

casa::AxesMapping::AxesMapping

(

const IPosition &

oldToNew

)

[explicit]

Construct it with the mapping from old to new axes order.

A value of -1 means that the old axes is ignored in the new one. Another value gives the new axis number.
It determines if axes are removed and/or reordered.

casa::AxesMapping::AxesMapping

(

const AxesMapping &

other

)

Copy constructor (copy semantics).

casa::AxesMapping::~AxesMapping

(

)

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Member Function Documentation

const IPosition& casa::AxesMapping::getToNew

(

)

const [inline]

Get the mapping of old->new.

The length of the resulting IPosition is the dimensionality of the original lattice. A value of -1 indicates that the corresponding axis in the original lattice is removed. Another value is the axis number in the new lattice,

Definition at line 121 of file AxesMapping.h.

References itsToNew.

const IPosition& casa::AxesMapping::getToOld

(

)

const [inline]

Get the mapping of new->old.

The length of the resulting IPosition is the dimensionality of the new lattice. Its values give the axes in the original lattice.

Definition at line 127 of file AxesMapping.h.

References itsToOld.

Bool casa::AxesMapping::isRemoved

(

)

const [inline]

Are axes removed?

Definition at line 109 of file AxesMapping.h.

References itsRemoved.

Bool casa::AxesMapping::isReordered

(

)

const [inline]

Is the axes order reordered?

Definition at line 113 of file AxesMapping.h.

References itsReordered.

AxesMapping& casa::AxesMapping::operator=

(

const AxesMapping &

other

)

Assignment (copy semantics).

This and that do not have to have the same length.

IPosition casa::AxesMapping::posToNew

(

const IPosition &

pos

)

const

Map an old position to the new one.

In debug-mode it checks if the removed axes have position 0 in the input position.

IPosition casa::AxesMapping::posToOld

(

const IPosition &

pos

)

const

Map a new position or shape to the old one.

IPosition casa::AxesMapping::shapeToNew

(

const IPosition &

shape

)

const

Map an old shape to the new one.

In debug-mode it checks if the removed axes have length 1 in the input shape.

IPosition casa::AxesMapping::shapeToOld

(

const IPosition &

shape

)

const

Map a new position or shape to the old one.

Slicer casa::AxesMapping::slicerToNew

(

const Slicer &

slicer

)

const

Map an old shape to the new one.

In debug-mode it checks if the removed axes have length 1 in the input slicer.

Slicer casa::AxesMapping::slicerToOld

(

const Slicer &

slicer

)

const

Map a new position or shape to the old one.

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Member Data Documentation

Bool casa::AxesMapping::itsRemoved [private]

Definition at line 157 of file AxesMapping.h.

Referenced by isRemoved().

Bool casa::AxesMapping::itsReordered [private]

Definition at line 158 of file AxesMapping.h.

Referenced by isReordered().

IPosition casa::AxesMapping::itsToNew [private]

Definition at line 155 of file AxesMapping.h.

Referenced by getToNew().

IPosition casa::AxesMapping::itsToOld [private]

Definition at line 156 of file AxesMapping.h.

Referenced by getToOld().

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

• casacore/casa/Arrays/AxesMapping.h