A lattice crosscut based on a curve in a plane. More...

#include <CurvedLattice2D.h>

Inheritance diagram for casa::CurvedLattice2D< T >:

Public Member Functions
	CurvedLattice2D ()
	Default constructor.
	CurvedLattice2D (const MaskedLattice< T > &, const CLInterpolator2D< T > &, const PixelCurve1D &, uInt axis1, uInt axis2, Int curveAxis=-1)
	Take a curved slice from the given MaskedLattice.
	CurvedLattice2D (const CurvedLattice2D< T > &other)
	Copy constructor (reference semantics)
virtual	~CurvedLattice2D ()
	Destructor, does nothing.
CurvedLattice2D< T > &	operator= (const CurvedLattice2D< T > &other)
	Assignment (reference semantics)
virtual MaskedLattice< T > *	cloneML () const
	Make a copy of the object (reference semantics).
virtual Bool	isMasked () const
	Is the lattice masked? It is if its parent lattice is masked.
virtual Bool	isPaged () const
	Is the lattice paged to disk?
virtual Bool	isWritable () const
	The lattice is not writable.
virtual Bool	lock (FileLocker::LockType, uInt nattempts)
	Handle ocking of the lattice which is delegated to its parent.
virtual void	unlock ()
virtual Bool	hasLock (FileLocker::LockType) const
virtual void	resync ()
	Resynchronize the Lattice object with the lattice file.
virtual void	flush ()
	Flush the data.
virtual void	tempClose ()
	Close the Lattice temporarily (if it is paged to disk).
virtual void	reopen ()
	If needed, reopen a temporarily closed Lattice.
virtual const LatticeRegion *	getRegionPtr () const
	Get a pointer the region/mask object.
virtual IPosition	shape () const
	Returns the shape of the lattice.
virtual String	name (Bool stripPath=False) const
	Return the name of the parent lattice.
virtual uInt	advisedMaxPixels () const
	This function returns the recommended maximum number of pixels to include in the cursor of an iterator.
virtual Bool	ok () const
	Check class internals - used for debugging.
virtual Bool	doGetSlice (Array< T > &buffer, const Slicer &section)
	Do the actual getting of an array of values.
virtual void	doPutSlice (const Array< T > &sourceBuffer, const IPosition &where, const IPosition &stride)
	Do the actual getting of an array of values.
virtual Bool	doGetMaskSlice (Array< Bool > &buffer, const Slicer &section)
	Get a section of the mask.
virtual IPosition	doNiceCursorShape (uInt maxPixels) const
	Get the best cursor shape.
Private Member Functions
void	makeMapping (uInt axis1, uInt axis2, Int curveAxis)
	Make the AxesMapping object to map input to output axes.
Private Attributes
MaskedLattice< T > *	itsLatticePtr
CLInterpolator2D< T > *	itsInterpolator
PixelCurve1D	itsCurve
uInt	itsAxis1
uInt	itsAxis2
uInt	itsCurveAxis
AxesMapping	itsAxesMap

Detailed Description

template<class T>
class casa::CurvedLattice2D< T >

A lattice crosscut based on a curve in a plane.

Intended use:

Internal

Review Status

Test programs:: tCurvedLattice2D

Prerequisite

Synopsis

Class CurvedImage2D can be used to make a crosscut through an image with a dimensionality >= 2. The crosscut is based on a curve defined by a PixelCurve1D object. The curve can be any 1-dim function (e.g. straight line, spline) supported by the Functionals module. The curve must be in one of the main planes of the image as defined by the axes arguments in the constructor.
See class CurvedImage2D for a more detailed description.

Example

See example in CurvedImage2D .

Motivation

Users like to view arbitrary image crosscuts.

Definition at line 81 of file CurvedLattice2D.h.

Constructor & Destructor Documentation

template<class T>

casa::CurvedLattice2D< T >::CurvedLattice2D ( )

Default constructor.

template<class T>

casa::CurvedLattice2D< T >::CurvedLattice2D	(	const MaskedLattice< T > &	,
		const CLInterpolator2D< T > &	,
		const PixelCurve1D &	,
		uInt	axis1,
		uInt	axis2,
		Int	curveAxis = `-1`
	)

Take a curved slice from the given MaskedLattice.

For example, define a spline in the RA-DEC plane and extend it in the FREQ direction. The result is a 2D lattice with axes FREQ and 'spline'.
The PixelCurve1D object defines the curve in one of the planes of the lattice. The arguments axis1 and axis2 define the plane the curve is in. The CLInterpolator2D object defines the interpolation scheme for pixels that are not on grid points. An example is CLIPNearest2D which takes the nearest neighbour. The dimensionality of the CurvedLattice2D is one less than the dimensionality of the given lattice. Two axes (axis1 and axis2) are replaced by the new axis representing the curve. The argument curveAxis defines the axis number of the new axis. It defaults to the last axis. An exception is thrown if the dimensionality of the input lattice is < 2 or if the given axes numbers are too high.

template<class T>

casa::CurvedLattice2D< T >::CurvedLattice2D ( const CurvedLattice2D< T > & other )

Copy constructor (reference semantics)

template<class T>

virtual casa::CurvedLattice2D< T >::~CurvedLattice2D ( ) [virtual]

Destructor, does nothing.

Member Function Documentation

template<class T>

virtual uInt casa::CurvedLattice2D< T >::advisedMaxPixels ( ) const [virtual]

This function returns the recommended maximum number of pixels to include in the cursor of an iterator.

Reimplemented from casa::Lattice< T >.

template<class T>

virtual MaskedLattice<T>* casa::CurvedLattice2D< T >::cloneML ( ) const [virtual]

Make a copy of the object (reference semantics).

Implements casa::MaskedLattice< T >.

template<class T>

virtual Bool casa::CurvedLattice2D< T >::doGetMaskSlice	(	Array< Bool > &	buffer,
		const Slicer &	section
	)		`[virtual]`

Get a section of the mask.

Reimplemented from casa::MaskedLattice< T >.

template<class T>

virtual Bool casa::CurvedLattice2D< T >::doGetSlice	(	Array< T > &	buffer,
		const Slicer &	section
	)		`[virtual]`

Do the actual getting of an array of values.

Implements casa::Lattice< T >.

template<class T>

virtual IPosition casa::CurvedLattice2D< T >::doNiceCursorShape ( uInt maxPixels ) const [virtual]

Get the best cursor shape.

Reimplemented from casa::LatticeBase.

template<class T>

virtual void casa::CurvedLattice2D< T >::doPutSlice	(	const Array< T > &	sourceBuffer,
		const IPosition &	where,
		const IPosition &	stride
	)		`[virtual]`

Do the actual getting of an array of values.

Implements casa::Lattice< T >.

template<class T>

virtual void casa::CurvedLattice2D< T >::flush ( ) [virtual]

Flush the data.

Reimplemented from casa::LatticeBase.

template<class T>

virtual const LatticeRegion* casa::CurvedLattice2D< T >::getRegionPtr ( ) const [virtual]

Get a pointer the region/mask object.

It returns 0.

Implements casa::MaskedLattice< T >.

template<class T>

virtual Bool casa::CurvedLattice2D< T >::hasLock ( FileLocker::LockType ) const [virtual]

Reimplemented from casa::LatticeBase.

template<class T>

virtual Bool casa::CurvedLattice2D< T >::isMasked ( ) const [virtual]

Is the lattice masked? It is if its parent lattice is masked.

Reimplemented from casa::MaskedLattice< T >.

template<class T>

virtual Bool casa::CurvedLattice2D< T >::isPaged ( ) const [virtual]

Is the lattice paged to disk?

Reimplemented from casa::LatticeBase.

template<class T>

virtual Bool casa::CurvedLattice2D< T >::isWritable ( ) const [virtual]

The lattice is not writable.

Reimplemented from casa::LatticeBase.

template<class T>

virtual Bool casa::CurvedLattice2D< T >::lock	(	FileLocker::LockType	,
		uInt	nattempts
	)		`[virtual]`

Handle ocking of the lattice which is delegated to its parent.

It is strongly recommended to use class LatticeLocker to handle lattice locking. It also contains a more detailed explanation of the locking process.

Reimplemented from casa::LatticeBase.

template<class T>

void casa::CurvedLattice2D< T >::makeMapping	(	uInt	axis1,
		uInt	axis2,
		Int	curveAxis
	)		`[private]`

Make the AxesMapping object to map input to output axes.

template<class T>

virtual String casa::CurvedLattice2D< T >::name ( Bool stripPath = False ) const [virtual]

Return the name of the parent lattice.

Reimplemented from casa::LatticeBase.

template<class T>

virtual Bool casa::CurvedLattice2D< T >::ok ( ) const [virtual]

Check class internals - used for debugging.

Should always return True

Reimplemented from casa::LatticeBase.

template<class T>

CurvedLattice2D<T>& casa::CurvedLattice2D< T >::operator= ( const CurvedLattice2D< T > & other )

Assignment (reference semantics)

template<class T>

virtual void casa::CurvedLattice2D< T >::reopen ( ) [virtual]

If needed, reopen a temporarily closed Lattice.

Reimplemented from casa::LatticeBase.

template<class T>

virtual void casa::CurvedLattice2D< T >::resync ( ) [virtual]

Resynchronize the Lattice object with the lattice file.

This function is only useful if no read-locking is used, ie. if the table lock option is UserNoReadLocking or AutoNoReadLocking. In that cases the table system does not acquire a read-lock, thus does not synchronize itself automatically.

Reimplemented from casa::LatticeBase.

template<class T>

virtual IPosition casa::CurvedLattice2D< T >::shape ( ) const [virtual]

Returns the shape of the lattice.

Implements casa::LatticeBase.

template<class T>

virtual void casa::CurvedLattice2D< T >::tempClose ( ) [virtual]

Close the Lattice temporarily (if it is paged to disk).

It'll be reopened automatically when needed or when reopen is called explicitly.

Reimplemented from casa::LatticeBase.

template<class T>

virtual void casa::CurvedLattice2D< T >::unlock ( ) [virtual]