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EpetraExt_Dirichlet_CrsMatrix.cpp
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00001 #if 0 // dead source
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00004 //
00005 //     EpetraExt: Epetra Extended - Linear Algebra Services Package
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00041 //@HEADER
00042 
00043 #include <EpetraExt_Dirichlet_CrsMatrix.h>
00044 
00045 #include <Epetra_CrsMatrix.h>
00046 #include <Epetra_IntVector.h>
00047 #include <Epetra_Import.h>
00048 #include <Epetra_Map.h>
00049 
00050 namespace EpetraExt {
00051 
00052 bool
00053 CrsMatrix_Dirichlet::
00054 fwd()
00055 {
00056   Epetra_CrsMatrix & Matrix = *origObj_;
00057 
00058   const Epetra_Map & RowMap = Matrix.RowMap();
00059   const Epetra_Map & ColMap = Matrix.ColMap();
00060 
00061   int NumMyElements = RowMap.NumMyElements();
00062   int NumMyColElements = ColMap.NumMyElements();
00063 
00064   if( symmetric_ && colSet_.empty() ) // get non-local column info
00065   {
00066     if( Matrix.IndicesAreGlobal() )
00067     {
00068       Epetra_Import Importer( ColMap, RowMap );
00069       Epetra_IntVector colLocations( ColMap );
00070       colLocations.Import( locations_, Importer, Insert );
00071       for( int i = 0; i < NumMyColElements; ++ i )
00072         if( colLocations[i] ) colSet_.insert(i);
00073     }
00074     else
00075     {
00076       for( int i = 0; i < NumMyElements; ++i )
00077         if( locations_[i] ) colSet_.insert(i);
00078     }
00079   }
00080 
00081   for( int i = 0; i < NumMyElements; ++i ) 
00082   {
00083     int * Indices;
00084     double * Vals;
00085     int NumIndices;
00086     if( locations_[i] ) //this is a Dirichlet BC location
00087     {
00088       Matrix.ExtractMyRowView( i, NumIndices, Vals, Indices );
00089       for( int j = 0; j < NumIndices; ++j )
00090       {
00091         if( Indices[j] == i ) Vals[i] = 1.0;
00092         else                  Vals[i] = 0.0;
00093       }
00094     }
00095     else if( symmetric_ )
00096     {
00097       Matrix.ExtractMyRowView( i, NumIndices, Vals, Indices );
00098       for( int j = 0; j < NumIndices; ++j )
00099         if( colSet_.count( Indices[j] ) ) Vals[j] = 0.0;
00100     }
00101   }
00102 
00103   return true;
00104 }
00105 
00106 bool
00107 CrsMatrix_Dirichlet::
00108 rvs()
00109 {
00110   return true;
00111 }
00112 
00113 } //namespace EpetraExt
00114 
00115 #endif // if 0
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