casa6
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xxxxxxxxxx void findGridSector(const casacore::Int& nxp, const casacore::Int& nyp, const casacore::Int& ixsub, const casacore::Int& iysub, const casacore::Int& minx, const casacore::Int& miny, const casacore::Int& icounter, casacore::Int& x0, casacore::Int& y0, casacore::Int& nxsub, casacore::Int& nysub, const casacore::Bool linear); //# WProjectFT.h: Definition for WProjectFT//# Copyright (C) 2003-2016//# 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 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 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 adressed 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//#//#//# $Id$namespace casacore{template <class K, class V> class SimpleOrderedMap;template <class T> class PtrBlock;template <class T> class CountedPtr;}namespace casa { //# NAMESPACE CASA - BEGINclass WPConvFunc; // <summary> An FTMachine for Gridded Fourier transforms </summary>// <use visibility=export>// <reviewed reviewer="" date="" tests="" demos="">// <prerequisite>// <li> <linkto class=FTMachine>FTMachine</linkto> module// <li> <linkto class=SkyEquation>SkyEquation</linkto> module// <li> <linkto class=VisBuffer>VisBuffer</linkto> module// </prerequisite>//// <etymology>// FTMachine is a Machine for Fourier Transforms. WProjectFT does// Grid-based Fourier transforms.// </etymology>//// <synopsis> // The <linkto class=SkyEquation>SkyEquation</linkto> needs to be able// to perform Fourier transforms on visibility data. WProjectFT// allows efficient Fourier Transform processing using a // <linkto class=VisBuffer>VisBuffer</linkto> which encapsulates// a chunk of visibility (typically all baselines for one time)// together with all the information needed for processing// (e.g. UVW coordinates).//// Gridding and degridding in WProjectFT are performed using a// novel sort-less algorithm. In this approach, the gridded plane is// divided into small patches, a cache of which is maintained in memory