PiecewiseLinearFillPatch.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
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// copyrights by any part of this software.
//

#ifndef _PIECEWISE_LINEAR_FILL_PATCH_H_
#define _PIECEWISE_LINEAR_FILL_PATCH_H_

#include <iostream>
#include <fstream>
#include "REAL.H"
#include "Box.H"
#include "FArrayBox.H"
#include "LevelData.H"
#include "IntVectSet.H"
#include "ProblemDomain.H"


class PiecewiseLinearFillPatch
{
public:

  PiecewiseLinearFillPatch();


  ~PiecewiseLinearFillPatch();


  PiecewiseLinearFillPatch(const DisjointBoxLayout& a_fine_domain,
                           const DisjointBoxLayout& a_coarse_domain, 
                           int a_num_comps,
                           const Box& a_crse_problem_domain,
                           int a_ref_ratio,
                           int a_interp_radius
                           );



  PiecewiseLinearFillPatch(const DisjointBoxLayout& a_fine_domain,
                           const DisjointBoxLayout& a_coarse_domain, 
                           int a_num_comps,
                           const ProblemDomain& a_crse_problem_domain,
                           int a_ref_ratio,
                           int a_interp_radius
                           );


  void
  define(const DisjointBoxLayout& a_fine_domain,
         const DisjointBoxLayout& a_coarse_domain, 
         int a_num_comps,
         const Box& a_crse_problem_domain,
         int a_ref_ratio,
         int a_interp_radius
         );



  void
  define(const DisjointBoxLayout& a_fine_domain,
         const DisjointBoxLayout& a_coarse_domain, 
         int a_num_comps,
         const ProblemDomain& a_crse_problem_domain,
         int a_ref_ratio,
         int a_interp_radius
         );


  bool 
  isDefined() const;


  void
  fillInterp(LevelData<FArrayBox>& a_fine_data,
             const LevelData<FArrayBox>& a_old_coarse_data,
             const LevelData<FArrayBox>& a_new_coarse_data,
             Real a_time_interp_coef,
             int a_src_comp,
             int a_dest_comp,
             int a_num_comp
             );

  // debugging utilities
  void
  printIntVectSets() const;


protected:
  // copy coarse data to coarsened fine work array and interpolate to
  // fine time level
  void
  timeInterp(const LevelData<FArrayBox>& a_old_coarse_data,
             const LevelData<FArrayBox>& a_new_coarse_data,
             Real a_time_interp_coef,
             int a_src_comp,
             int a_dest_comp,
             int a_num_comp
             );


  // fill the fine interpolation sites piecewise-constantly
  void
  fillConstantInterp(LevelData<FArrayBox>& a_fine_data,
                     int a_src_comp,
                     int a_dest_comp,
                     int a_num_comp
                     ) 
    const;


  // compute slopes in specified direction
  void
  computeSlopes(int a_src_comp,
                int a_num_comp);


  // increment the fine interpolation sites with linear term for the
  // specified coordinate direction
  void
  incrementLinearInterp(LevelData<FArrayBox>& a_fine_data,
                        int a_src_comp,
                        int a_dest_comp,
                        int a_num_comp)
    const;


protected:
  bool m_is_defined;
  // the radius of the interpolation stencil.  e.g. a stencil using
  // (i-1,j), (i,j) and (i+1,j) has a radius of 1.
  static const int s_stencil_radius;
  // refinement ratio
  int m_ref_ratio;
  // number of layers of fine ghost cells to fill by interpolation.
  int m_interp_radius;
  // work array for coarse data in grids shaped like the fine level.
  LevelData<FArrayBox> m_coarsened_fine_data;
  // work array for slopes
  LevelData<FArrayBox> m_slopes[3];
  // problem domain on the coarse level.
  ProblemDomain m_crse_problem_domain;
  // per-grid fine locations that you interpolate to.
  LayoutData<IntVectSet> m_fine_interp;
  // per-grid coarse locations that you interpolate from, by type of
  // interpolation in the specified coordinate direction.
  LayoutData<IntVectSet> m_coarse_centered_interp[SpaceDim];
  LayoutData<IntVectSet> m_coarse_lo_interp[SpaceDim];
  LayoutData<IntVectSet> m_coarse_hi_interp[SpaceDim];
};

#endif

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