libtrilinos-galeri-dev 12.4.2-2 / usr / include / trilinos / Galeri_BigStar2D.h

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#ifndef GALERI_BIGSTAR2D_H
#define GALERI_BIGSTAR2D_H

#include "Galeri_Exception.h"
#include "Galeri_Utils.h"
#include "Epetra_Comm.h"
#include "Epetra_BlockMap.h"
#include "Epetra_CrsMatrix.h"

namespace Galeri {
namespace Matrices {

template<typename int_type>
inline
Epetra_CrsMatrix* 
BigStar2D(const Epetra_Map* Map, const int nx, const int ny,
          const double a, const double b, const double c,
          const double d, const double e,
          const double z1, const double z2,
          const double z3, const double z4,
          const double bb, const double cc, const double dd, const double ee)

{
  Epetra_CrsMatrix* Matrix = new Epetra_CrsMatrix(Copy, *Map,  13);

  int NumMyElements = Map->NumMyElements();
  int_type* MyGlobalElements = 0;
  Map->MyGlobalElementsPtr(MyGlobalElements);

  int left, right, lower, upper;
  int left2, right2, lower2, upper2;
  double Values[13];
  int_type Indices[13];

  //        ee
  //    z3  e  z4
  // bb  b  a  c  cc
  //    z1  d  z2
  //        dd
  
  for (int i = 0 ; i < NumMyElements ; ++i) 
  {
    int NumEntries = 0;
    GetNeighboursCartesian2d(MyGlobalElements[i], nx, ny, 
			     left, right, lower, upper,
			     left2, right2, lower2, upper2);

    if (left != -1) 
    {
      Values[NumEntries] = b;
      Indices[NumEntries] = left;
      ++NumEntries;
    }
    if (right != -1) 
    {
      Values[NumEntries] = c;
      Indices[NumEntries] = right;
      ++NumEntries;
    }
    if (lower != -1) 
    {
      Values[NumEntries] = d;
      Indices[NumEntries] = lower;
      ++NumEntries;
    }
    if (upper != -1) 
    {
      Values[NumEntries] = e;
      Indices[NumEntries] = upper;
      ++NumEntries;
    }
    if (left != -1 && lower != -1) 
    {
      Values[NumEntries] = z1;
      Indices[NumEntries] = lower - 1;
      ++NumEntries;
    }
    if (right != -1 && lower != -1) 
    {
      Values[NumEntries] = z2;
      Indices[NumEntries] = lower + 1;
      ++NumEntries;
    }
    if (left != -1 && upper != -1) 
    {
      Values[NumEntries] = z3;
      Indices[NumEntries] = upper - 1;
      ++NumEntries;
    }
    if (right != -1 && upper != -1) 
    {
      Values[NumEntries] = z4;
      Indices[NumEntries] = upper + 1;
      ++NumEntries;
    }
    if (left2 != -1) 
    {
      Values[NumEntries] = bb;
      Indices[NumEntries] = left2;
      ++NumEntries;
    }
    if (right2 != -1) 
    {
      Values[NumEntries] = cc;
      Indices[NumEntries] = right2;
      ++NumEntries;
    }
    if (lower2 != -1) 
    {
      Values[NumEntries] = dd;
      Indices[NumEntries] = lower2;
      ++NumEntries;
    }
    if (upper2 != -1) 
    {
      Values[NumEntries] = ee;
      Indices[NumEntries] = upper2;
      ++NumEntries;
    }
    
    Values[NumEntries] = a;
    Indices[NumEntries] = MyGlobalElements[i];
    ++NumEntries;

    Matrix->InsertGlobalValues(MyGlobalElements[i], NumEntries, 
                               &Values[0], &Indices[0]);
  }

  Matrix->FillComplete();
  Matrix->OptimizeStorage();

  return(Matrix);
}

inline
Epetra_CrsMatrix* 
BigStar2D(const Epetra_Map* Map, const int nx, const int ny,
          const double a, const double b, const double c,
          const double d, const double e,
          const double z1, const double z2,
          const double z3, const double z4,
          const double bb, const double cc, const double dd, const double ee)
{
#ifndef EPETRA_NO_32BIT_GLOBAL_INDICES
  if(Map->GlobalIndicesInt()) {
	  return BigStar2D<int>(Map, nx, ny, a, b, c, d, e, z1, z2, z3, z4, bb, cc, dd, ee);
  }
  else
#endif
#ifndef EPETRA_NO_64BIT_GLOBAL_INDICES
  if(Map->GlobalIndicesLongLong()) {
	  return BigStar2D<long long>(Map, nx, ny, a, b, c, d, e, z1, z2, z3, z4, bb, cc, dd, ee);
  }
  else
#endif
    throw "Galeri::Matrices::BigStar2D: GlobalIndices type unknown";
}

} // namespace Matrices
} // namespace Galeri
#endif