CoarseAverageFace.H

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#ifdef CH_LANG_CC
/*
*      _______              __
*     / ___/ /  ___  __ _  / /  ___
*    / /__/ _ \/ _ \/  V \/ _ \/ _ \
*    \___/_//_/\___/_/_/_/_.__/\___/
*    Please refer to Copyright.txt, in Chombo's root directory.
*/
#endif

#ifndef _COARSEAVERAGEFACE_H_
#define _COARSEAVERAGEFACE_H_

#include "REAL.H"
#include "FluxBox.H"
#include "LevelData.H"
#include "NamespaceHeader.H"



class CoarseAverageFace
{
public:
  CoarseAverageFace();

  CoarseAverageFace(const DisjointBoxLayout& a_fineGrids,
                    int a_nComp, int a_nRef);

  ~CoarseAverageFace();

  void define(const DisjointBoxLayout& a_fineGrids,
              int a_nComp, int a_nRef);

  bool isDefined() const;

  void averageToCoarse(LevelData<FluxBox>& a_coarse_data,
                       const LevelData<FluxBox>& a_fine_data);

  void averageToCoarseHarmonic(LevelData<FluxBox>& a_coarse_data,
                               const LevelData<FluxBox>& a_fine_data);

protected:

  enum averageType {arithmetic = 0,
                    harmonic,
                    NUM_AVERAGE_TYPES};

  bool m_isDefined;

  int m_nRef;

  // work array for coarsening of fine data, same "shape" as fine data
  LevelData<FluxBox> m_coarsenedFineData;

  void computeAverages(LevelData<FluxBox>& a_coarse_data,
                       const LevelData<FluxBox>& a_fine_data,
                       int a_averageType);


  void averageGridData(FluxBox& a_coarsenedFine,
                       const FluxBox& fine,
                       int a_averageType) const;


};

#include "NamespaceFooter.H"
#endif

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