Specification of new and stretched lattice axes. More...

#include <ExtendSpecifier.h>

Public Member Functions
	ExtendSpecifier ()
	Default constructor generates empty IPositions.
	ExtendSpecifier (const IPosition &oldShape, const IPosition &newShape, const IPosition &newAxes, const IPosition &stretchAxes)
	Tell if no or all degenerate axes have to be removed.
	ExtendSpecifier (const ExtendSpecifier &other)
	Copy constructor (copy semantics).
	~ExtendSpecifier ()
ExtendSpecifier &	operator= (const ExtendSpecifier &other)
	Assignment (copy semantics).
const IPosition &	newShape () const
	Return the new shape.
const IPosition &	newAxes () const
	Return the new axes.
const IPosition &	stretchAxes () const
	Return the axes to be stretched.
const IPosition &	oldShape () const
	Return the old shape.
const IPosition &	extendAxes () const
	Return the axes to be extended (i.e.
const IPosition &	oldOldAxes () const
	Return the old axes (i.e.
const IPosition &	oldNewAxes () const
	Return the old axes as in new shape.
Slicer	convert (IPosition &shape, const Slicer &section) const
	Convert the slicer to the specification for the old shape.
IPosition	convertNew (const IPosition &oldShape) const
	Convert a shape to the specification for the new shape.
Private Member Functions
void	fill (Block< Bool > &flags, const IPosition &axes) const
	Fill the flags for the given axes.
Private Attributes
IPosition	itsOldShape
IPosition	itsNewShape
IPosition	itsNewAxes
IPosition	itsStretchAxes
IPosition	itsExtendAxes
IPosition	itsOldOldAxes
IPosition	itsOldNewAxes

Detailed Description

Specification of new and stretched lattice axes.

Intended use:

Internal

Review Status

Date Reviewed:: yyyy/mm/dd
Test programs:: tExtendSpecifier

Prerequisite

IPosition

Synopsis

ExtendSpecifier is a class internally used by class ExtendLattice . It holds the information which axes are stretched and which axes are new. Note that a stretched axis has to have length 1 in the original shape.

The class only contains the functionality needed by ExtendLattice. which are (mainly) 2 conversion functions. One function converts a slicer from the extended lattice to the original lattice, so ExtendLattice can read the correct data. The other function converts a shape in the original lattice to the shape in the extended lattice.
Some data is precalculated for more efficient processing of the conversion of slicers and shapes.

Example

    IPosition oldShape(4,10,1,3,1);
    IPosition newShape(5,10,1,5,3,8);
    ExtendSpecifier spec (oldShape, newShape, IPosition(1,2), IPosition(1,4));

This example extends the old shape to the new shape.
The 3rd argument tells that axes 2 is new. The newShape tells that its length will be 5. Note that adding this axis means that axes 2 in the old shape will get axes 3 in the new shape.
The 4th argument tells that axes 4 (in the new shape!!) is stretched (to 8 according to newShape).

Definition at line 90 of file ExtendSpecifier.h.

Constructor & Destructor Documentation

casa::ExtendSpecifier::ExtendSpecifier ( )

Default constructor generates empty IPositions.

casa::ExtendSpecifier::ExtendSpecifier	(	const IPosition &	oldShape,
		const IPosition &	newShape,
		const IPosition &	newAxes,
		const IPosition &	stretchAxes
	)