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NodeMaskAverage2.H

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/*  _______              __
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//
// This software is copyright (C) by the Lawrence Berkeley
// National Laboratory.  Permission is granted to reproduce
// this software for non-commercial purposes provided that
// this notice is left intact.
// 
// It is acknowledged that the U.S. Government has rights to
// this software under Contract DE-AC03-765F00098 between
// the U.S.  Department of Energy and the University of
// California.
//
// This software is provided as a professional and academic
// contribution for joint exchange. Thus it is experimental,
// is provided ``as is'', with no warranties of any kind
// whatsoever, no support, no promise of updates, or printed
// documentation. By using this software, you acknowledge
// that the Lawrence Berkeley National Laboratory and
// Regents of the University of California shall have no
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// copyrights by any part of this software.
//

// petermc, Tue, Nov 28, 2000
#ifndef NODEMASKAVERAGE2_H
#define NODEMASKAVERAGE2_H

#include "REAL.H"
#include "BaseFab.H"
#include "NodeFArrayBox.H"
#include "LevelData.H"
#include "DisjointBoxLayout.H"


class NodeMaskAverage2
{
public:



  NodeMaskAverage2();


  NodeMaskAverage2(const DisjointBoxLayout& a_gridsFine,
                   const DisjointBoxLayout& a_gridsCoarse,
                   int a_numcomps,
                   const ProblemDomain& a_domainFine,
                   Real a_dx);


  NodeMaskAverage2(const DisjointBoxLayout& a_gridsCoarse,
                   int a_numcomps,
                   const ProblemDomain& a_domainFine,
                   Real a_dx);
  

  ~NodeMaskAverage2();


  void define(const DisjointBoxLayout& a_gridsFine,
              const DisjointBoxLayout& a_gridsCoarse,
              int a_numcomps,
              const ProblemDomain& a_domainFine,
              Real a_dx);



  void define(const DisjointBoxLayout& a_gridsCoarse,
              int a_numcomps,
              const ProblemDomain& a_domainFine,
              Real a_dx);




  bool isDefined() const;
  



  //     this method would like to be const, but the work array is changed.
  //     this suggests that the work array should not be persistent.
  void averageToCoarse(LevelData<NodeFArrayBox>& a_coarse,
                       LevelData<NodeFArrayBox>& a_fine);

protected:

  void getWeights(const DisjointBoxLayout& a_gridsFine);

  bool is_defined;

  Box m_refbox;

  // mesh spacing
  Real m_dx;

  // are the fine grids merely refined versions of the coarse grids?
  bool m_sameGrids;

  // coarsened fine grids
  DisjointBoxLayout m_coarsenedFineGrids;

  // work array for the coarsening of the fine data, of the same "shape"
  // as the fine data -- used iff !m_sameGrids
  LevelData<NodeFArrayBox> m_coarsenedFine;

  // interior boundary nodes of coarsened fine grids, distributed
  // among coarse grids -- used iff !m_sameGrids
  LayoutData< Vector<IntVectSet> > m_IVSV;

  // interior boundary nodes of coarsened fine grids
  LayoutData< Vector<IntVectSet> > m_IVSVsame;

  // weights for averaging from fine grids to coarsened fine grids
  LevelData<NodeFArrayBox> m_weights;

  //
  BoxLayoutData< BaseFab<int> > m_mask;

  void clearMemory();
};

#endif

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