PiecewiseLinearFillPatchFace.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'',
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** 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 liability with respect
** to the infringement of other copyrights by any part of this software.
*/
#ifndef _PIECEWISE_LINEAR_FILL_PATCH_FACE_H_
#define _PIECEWISE_LINEAR_FILL_PATCH_FACE_H_

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


class PiecewiseLinearFillPatchFace
{
public:

  PiecewiseLinearFillPatchFace();


  ~PiecewiseLinearFillPatchFace();
  

  PiecewiseLinearFillPatchFace(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
                               );



  PiecewiseLinearFillPatchFace(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<FluxBox>& a_fine_data,
             const LevelData<FluxBox>& a_old_coarse_data,
             const LevelData<FluxBox>& 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<FluxBox>& a_old_coarse_data,
             const LevelData<FluxBox>& 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<FluxBox>& 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_dir,
                int a_src_comp,
                int a_num_comp);
  

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


  // now do the fine interpolation normal to the face directions
  void 
  incrementLinearInterpNormal(LevelData<FluxBox>& 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<FluxBox> m_coarsened_fine_data;
  // work array for slopes
  LevelData<FluxBox> m_slopes;
  // problem domain on the coarse level.
  ProblemDomain m_crse_problem_domain;
  // per-grid fine locations that you interpolate to.
  LayoutData<IntVectSet> m_fine_interp[SpaceDim];
  // per-grid coarse locations that you interpolate from, by type of
  // interpolation in the specified coordinate direction.
  // note that there are two subscripts here -- first one 
  // refers to direction of slopes, second to direction of face
  LayoutData<IntVectSet> m_coarse_centered_interp[SpaceDim][SpaceDim];
  LayoutData<IntVectSet> m_coarse_lo_interp[SpaceDim][SpaceDim];
  LayoutData<IntVectSet> m_coarse_hi_interp[SpaceDim][SpaceDim];
};

#endif

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