47#ifndef MUELU_DROPNEGATIVEENTRIESFACTORY_DEF_HPP
48#define MUELU_DROPNEGATIVEENTRIESFACTORY_DEF_HPP
50#include <Xpetra_CrsGraph.hpp>
51#include <Xpetra_Matrix.hpp>
52#include <Xpetra_Vector.hpp>
53#include <Xpetra_MatrixFactory.hpp>
54#include <Xpetra_CrsGraphFactory.hpp>
58#include "MueLu_FactoryManager.hpp"
61#include "MueLu_Graph.hpp"
66 template <
class Scalar,
class LocalOrdinal,
class GlobalOrdinal,
class Node>
68 RCP<ParameterList> validParamList = rcp(
new ParameterList());
70#define SET_VALID_ENTRY(name) validParamList->setEntry(name, MasterList::getEntry(name))
73 validParamList->set< RCP<const FactoryBase> >(
"A", Teuchos::null,
"Generating factory of the matrix A used for filtering");
75 return validParamList;
78 template <
class Scalar,
class LocalOrdinal,
class GlobalOrdinal,
class Node>
80 Input(currentLevel,
"A");
83 template <
class Scalar,
class LocalOrdinal,
class GlobalOrdinal,
class Node>
85 FactoryMonitor m(*
this,
"Matrix filtering (springs)", currentLevel);
87 RCP<Matrix> Ain = Get< RCP<Matrix> >(currentLevel,
"A");
92 Teuchos::RCP<Matrix> Aout = MatrixFactory::Build(Ain->getRowMap(), Ain->getGlobalMaxNumRowEntries());
94 size_t numLocalRows = Ain->getLocalNumRows();
95 for(
size_t row=0; row<numLocalRows; row++) {
98 int rDofID = Teuchos::as<int>(grid % nDofsPerNode);
101 Teuchos::ArrayView<const LocalOrdinal> indices;
102 Teuchos::ArrayView<const Scalar> vals;
103 Ain->getLocalRowView(row, indices, vals);
106 Teuchos::ArrayRCP<GlobalOrdinal> indout(indices.size(),Teuchos::ScalarTraits<GlobalOrdinal>::zero());
107 Teuchos::ArrayRCP<Scalar> valout(indices.size(),Teuchos::ScalarTraits<Scalar>::zero());
109 size_t nNonzeros = 0;
110 for(
size_t i=0; i<(size_t)indices.size(); i++) {
111 GlobalOrdinal gcid = Ain->getColMap()->getGlobalElement(indices[i]);
113 int cDofID = Teuchos::as<int>(gcid % nDofsPerNode);
114 if(rDofID == cDofID && Teuchos::ScalarTraits<Scalar>::magnitude(vals[i]) >= Teuchos::ScalarTraits<Scalar>::magnitude(Teuchos::ScalarTraits<Scalar>::zero())) {
115 indout [nNonzeros] = gcid;
116 valout [nNonzeros] = vals[i];
120 indout.resize(nNonzeros);
121 valout.resize(nNonzeros);
123 Aout->insertGlobalValues(Ain->getRowMap()->getGlobalElement(row), indout.view(0,indout.size()), valout.view(0,valout.size()));
126 Aout->fillComplete(Ain->getDomainMap(), Ain->getRangeMap());
129 Aout->SetFixedBlockSize(nDofsPerNode);
131 GetOStream(
Statistics0, 0) <<
"Nonzeros in A (input): " << Ain->getGlobalNumEntries() <<
", Nonzeros after filtering A: " << Aout->getGlobalNumEntries() << std::endl;
133 Set(currentLevel,
"A", Aout);
MueLu::DefaultLocalOrdinal LocalOrdinal
MueLu::DefaultGlobalOrdinal GlobalOrdinal
void DeclareInput(Level ¤tLevel) const
Input.
RCP< const ParameterList > GetValidParameterList() const
Return a const parameter list of valid parameters that setParameterList() will accept.
void Build(Level ¤tLevel) const
Build method.
Timer to be used in factories. Similar to Monitor but with additional timers.
Class that holds all level-specific information.
Namespace for MueLu classes and methods.
@ Statistics0
Print statistics that do not involve significant additional computation.