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NodeBiCGStabSmoother.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
// liability with respect to the infringement of other
// copyrights by any part of this software.
//

// NodeBiCGStabSmoother.H
// adapted from BiCGStabSmoother by DFMartin, Sun, May 5, 2002
// petermc, 5 June 2002

#ifndef NODEBICGSTABSMOOTHER_H
#define NODEBICGSTABSMOOTHER_H

#include <iostream>
#include <math.h>
#include <assert.h>
#include <stdlib.h>
#include "REAL.H"
#include "IntVect.H"
#include "Box.H"
#include "DisjointBoxLayout.H"
#include "LevelData.H"
#include "NodeFArrayBox.H"
#include "ProblemDomain.H"
#include "NodeBaseBottomSmoother.H"


class NodeBiCGStabSmoother : public NodeBaseBottomSmoother
{

public:



  NodeBiCGStabSmoother();


  virtual ~NodeBiCGStabSmoother();


  virtual NodeBaseBottomSmoother* new_bottomSmoother() const;



  void setMaxIter(int a_max_iter);


  void setSolverTol(Real a_solverTol);
  

  void setVerbose(bool a_verbose);


  virtual void doBottomSmooth(LevelData<NodeFArrayBox>& a_phi,
                              const LevelData<NodeFArrayBox>& a_rhs,
                              NodeLevelOp* a_levelopPtr);

protected:

  // max number of iterations
  int m_maxIter;

  // solver tolerance
  Real m_solverTol;
  
  // small parameter to check for division by zero
  Real m_small;

  // parameter to check for hanging
  Real m_converge_small;

  // default is false
  bool m_verbose;
};

#endif

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