void MonolithicBlockMatrix::applyPreconditioner( const matrixPtr_Type prec, matrixPtr_Type& oper )
{
matrix_Type tmpMatrix(prec->map(), 1);
EpetraExt::MatrixMatrix::Multiply( *prec->matrixPtr(),
false,
*oper->matrixPtr(),
false,
*tmpMatrix.matrixPtr());
oper->swapCrsMatrix(tmpMatrix);
}
void
PreconditionerTeko::buildPreconditionerTeko ( RCP<Teko::BlockPreconditionerFactory> precFact,
matrixPtr_Type& oper,
const std::vector<int>& blockSizes )
{
// Building the preconditioner
Teko::Epetra::EpetraBlockPreconditioner* prec = new Teko::Epetra::EpetraBlockPreconditioner ( precFact );
M_oper = oper->matrixPtr();
std::vector<std::vector<int> > vec;
buildBlockGIDs ( vec, oper->rangeMap(), blockSizes );
// Building the block operator from the matrix
Teuchos::RCP<Teko::Epetra::BlockedEpetraOperator> sA
= Teuchos::rcp ( new Teko::Epetra::BlockedEpetraOperator ( vec, Teuchos::rcp ( M_oper ) ) );
M_prec.reset ( prec );
//Building explicitly the preconditioner
M_prec->buildPreconditioner ( sA );
if ( !M_prec.get() )
{
//! if not filled, I do not know how to diagonalize.
ERROR_MSG ( "Preconditioner not set, something went wrong in its computation\n" );
}
this->M_preconditionerCreated = true;
}
void LinearSolver::setOperator ( matrixPtr_Type matrixPtr )
{
M_operator = matrixPtr->matrixPtr();
M_matrix = matrixPtr;
}