NNGridder.h

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//# NNGridder.h: Definition for Nearest Neighbour Gridder
//# Copyright (C) 1996,1997,1999
//# 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
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//#
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//# 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.
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//# along with this library; if not, write to the Free Software Foundation,
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//# $Id: NNGridder.h 21024 2011-03-01 11:46:18Z gervandiepen $

#ifndef SCIMATH_NNGRIDDER_H
#define SCIMATH_NNGRIDDER_H

#include <scimath/Mathematics/Gridder.h>

namespace casa { //# NAMESPACE CASA - BEGIN

// <summary>
// A non-negative gridding class
// </summary>

template <class Domain, class Range>
class NNGridder : public Gridder<Domain, Range>
{
public:
  NNGridder(const IPosition& shape, const Vector<Domain>& scale,
            const Vector<Domain>& offset);

  virtual ~NNGridder() {}

  virtual Bool grid(Array<Range>& gridded,
                    const Vector<Domain>& position,
                    const Range& value);

  virtual Bool degrid(const Array<Range>& gridded,
                      const Vector<Domain>& position,
                      Range& value);

protected:
  virtual Range correctionFactor1D(Int loc, Int len);

  Vector<Int> loc;

protected:
  //# Make members of parent classes known.
  using Gridder<Domain,Range>::ndim;
  using Gridder<Domain,Range>::offsetVec;
  using Gridder<Domain,Range>::fillCorrectionVectors;
  using Gridder<Domain,Range>::onGrid;
};

} //# NAMESPACE CASA - END

#ifndef CASACORE_NO_AUTO_TEMPLATES
#include <scimath/Mathematics/NNGridder.tcc>
#endif //# CASACORE_NO_AUTO_TEMPLATES
#endif