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MueLu_BrickAggregationFactory_decl.hpp
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46 #ifndef MUELU_BRICKAGGREGATIONFACTORY_DECL_HPP_
47 #define MUELU_BRICKAGGREGATIONFACTORY_DECL_HPP_
48 
49 #include "MueLu_ConfigDefs.hpp"
50 
51 #include <Xpetra_Import_fwd.hpp>
53 #include <Xpetra_Map_fwd.hpp>
55 #include <Xpetra_Matrix_fwd.hpp>
58 
61 
62 #include "MueLu_Level_fwd.hpp"
63 #include "MueLu_Aggregates_fwd.hpp"
64 #include "MueLu_Exceptions.hpp"
65 #include "MueLu_Utilities_fwd.hpp"
66 
76 namespace MueLu {
77 
78  template <class Scalar = double,
79  class LocalOrdinal = int,
80  class GlobalOrdinal = LocalOrdinal,
83 #undef MUELU_BRICKAGGREGATIONFACTORY_SHORT
84 #include "MueLu_UseShortNames.hpp"
85  private:
87 
88  // Comparator for doubles
89  // Generally, the coordinates for coarser levels would come out of averaging of fine level coordinates
90  // It is possible that the result of the averaging differs slightly between clusters, as we might have
91  // 3x2 and 2x2 cluster which would result in averaging 6 and 4 y-coordinates respectively, leading to
92  // slightly different results.
93  // Therefore, we hardcode a constant so that close points are considered the same.
94  class compare {
95  public:
96  bool operator()(const Scalar& x, const Scalar& y) const {
97  if (STS::magnitude(x - y) < 1e-14)
98  return false;
99  return STS::real(x) < STS::real(y);
100  }
101  };
102  typedef std::map<Scalar,GlobalOrdinal,compare> container;
103 
104  public:
106 
107 
109  BrickAggregationFactory() : nDim_(-1), nx_(-1), ny_(-1), nz_(-1), bx_(-1), by_(-1), bz_(-1) { };
110 
113 
115 
117 
118  // Options shared by all aggregation algorithms
119 
121 
122 
123  void DeclareInput(Level &currentLevel) const;
124 
126 
128 
129 
131  void Build(Level &currentLevel) const;
132 
134 
135  private:
136  void Setup(const RCP<const Teuchos::Comm<int> >& comm, const RCP<Xpetra::MultiVector<typename Teuchos::ScalarTraits<Scalar>::magnitudeType,LO,GO,NO> >& coords, const RCP<const Map>& map) const;
138 
139  bool isRoot (LocalOrdinal LID) const;
140  GlobalOrdinal getRoot (LocalOrdinal LID) const;
141  GlobalOrdinal getAggGID(LocalOrdinal LID) const;
142 
143  mutable
144  int nDim_;
145  mutable
147  mutable
149  mutable
150  int nx_, ny_, nz_;
151  mutable
152  int bx_, by_, bz_;
153  mutable
154  std::map<GlobalOrdinal,GlobalOrdinal> revMap_;
155  }; // class BrickAggregationFactory
156 
157 }
158 
159 #define MUELU_BRICKAGGREGATIONFACTORY_SHORT
160 #endif /* MUELU_BRICKAGGREGATIONFACTORY_DECL_HPP_ */
ArrayRCP< const typename Teuchos::ScalarTraits< Scalar >::magnitudeType > x_
GlobalOrdinal GO
static magnitudeType real(T a)
LocalOrdinal LO
void Build(Level &currentLevel) const
Build aggregates.
GlobalOrdinal getAggGID(LocalOrdinal LID) const
Class that holds all level-specific information.
Definition: MueLu_Level.hpp:99
void Setup(const RCP< const Teuchos::Comm< int > > &comm, const RCP< Xpetra::MultiVector< typename Teuchos::ScalarTraits< Scalar >::magnitudeType, LO, GO, NO > > &coords, const RCP< const Map > &map) const
ArrayRCP< const typename Teuchos::ScalarTraits< Scalar >::magnitudeType > z_
std::map< GlobalOrdinal, GlobalOrdinal > revMap_
static magnitudeType magnitude(T a)
bool operator()(const Scalar &x, const Scalar &y) const
RCP< container > Construct1DMap(const RCP< const Teuchos::Comm< int > > &comm, const ArrayRCP< const typename Teuchos::ScalarTraits< Scalar >::magnitudeType > &x) const
Node NO
ArrayRCP< const typename Teuchos::ScalarTraits< Scalar >::magnitudeType > y_
std::map< Scalar, GlobalOrdinal, compare > container
Base class for factories that use one level (currentLevel).
GlobalOrdinal getRoot(LocalOrdinal LID) const
void DeclareInput(Level &currentLevel) const
Input.
RCP< const ParameterList > GetValidParameterList() const
Return a const parameter list of valid parameters that setParameterList() will accept.