/usr/include/casacore/images/Regions/WCExtension.h is in casacore-dev 2.2.0-2.
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//# Copyright (C) 1998,2001
//# Associated Universities, Inc. Washington DC, USA.
//#
//# This library is free software; you can redistribute it and/or modify it
//# under the terms of the GNU Library General Public License as published by
//# the Free Software Foundation; either version 2 of the License, or (at your
//# option) any later version.
//#
//# This library is distributed in the hope that it will be useful, but WITHOUT
//# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
//# FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public
//# License for more details.
//#
//# You should have received a copy of the GNU Library General Public License
//# along with this library; if not, write to the Free Software Foundation,
//# Inc., 675 Massachusetts Ave, Cambridge, MA 02139, USA.
//#
//# Correspondence concerning AIPS++ should be addressed as follows:
//# Internet email: aips2-request@nrao.edu.
//# Postal address: AIPS++ Project Office
//# National Radio Astronomy Observatory
//# 520 Edgemont Road
//# Charlottesville, VA 22903-2475 USA
//#
//# $Id$
#ifndef IMAGES_WCEXTENSION_H
#define IMAGES_WCEXTENSION_H
//# Includes
#include <casacore/casa/aips.h>
#include <casacore/images/Regions/WCCompound.h>
#include <casacore/casa/Arrays/IPosition.h>
namespace casacore { //# NAMESPACE CASACORE - BEGIN
//# Forward declarations
class WCBox;
// <summary>
// Make the extension of an image region.
// </summary>
// <use visibility=export>
// <reviewed reviewer="" date="" tests="">
// </reviewed>
// <prerequisite>
// <li> <linkto class=WCCompound>WCCompound</linkto>
// </prerequisite>
// <synopsis>
// The WCExtension class is a specialization of class
// <linkto class=WCCompound>WCCompound</linkto>.
// It makes it possible to extend a region along straight lines to
// other dimensions. It is also possible to extend existing axes with
// length 1, i.e. to stretch such axes.
// E.g. a circle in the RA,DEC plane can be extended to
// a cylinder in a RA,DEC,FREQ cube. It is possible to extend over
// more than one dimension. One can also limit the extension range
// E.g. in the forementioned example the circle can be extended
// for a given range of frequencies only.
// <br>The extension axes and ranges have to be given as a
// <linkto class=WCBox>WCBox</linkto> object. The axes which are part
// of the box and the region are the axes to be stretched. Box axes
// which are not part of the region are the extension axes.
// <p>
// Note that regions get automatically extended when a region is used
// for a higher dimensioned image. The extension is done for all
// unknown axes (for their entire length).
// </synopsis>
// <example>
// <srcblock>
// </srcblock>
// </example>
//# <todo asof="1997/11/11">
//# <li>
//# </todo>
class WCExtension: public WCCompound
{
public:
// Construct the extension of an image region using the axes
// and blc,trc given in the extendBox.
// The axes in region and box have to be disjoint.
WCExtension (const ImageRegion& region, const WCBox& extendBox);
// Copy constructor (copy semantics).
WCExtension (const WCExtension& other);
virtual ~WCExtension();
// Assignment (copy semantics).
WCExtension& operator= (const WCExtension& other);
// Comparison
virtual Bool operator== (const WCRegion& other) const;
// Make a copy of the derived object.
virtual WCRegion* cloneRegion() const;
// Get the class name (to store in the record).
static String className();
// Get the region type. Returns className()
virtual String type() const;
// Convert the (derived) object to a record.
virtual TableRecord toRecord (const String& tableName) const;
// Convert correct object from a record.
static WCExtension* fromRecord (const TableRecord&,
const String& tableName);
protected:
// WCExtension can extend a region if WCBox can do so.
virtual Bool canExtend() const;
// Convert to an LCRegion using the given coordinate system and shape.
// pixelAxesMap(i) gives the pixel axis in cSys of axes <src>i</src>
// in the axesDesc.
virtual LCRegion* doToLCRegion (const CoordinateSystem& cSys,
const IPosition& shape,
const IPosition& pixelAxesMap,
const IPosition& outOrder) const;
private:
// Construct from multiple regions given as a Block.
// When <src>takeOver</src> is True, the destructor will delete the
// given regions. Otherwise a copy of the regions is made.
WCExtension (Bool takeOver, const PtrBlock<const WCRegion*>& regions);
// Find the axes to be extended and stretched.
// The extend axes are the axis numbers in the box.
// For the stretch axes both box and region axes are returned.
void findAxes (IPosition& extendBoxAxes, IPosition& stretchBoxAxes,
IPosition& stretchRegionAxes) const;
};
} //# NAMESPACE CASACORE - END
#endif
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