MFEM  v4.5.2
Finite element discretization library
Public Member Functions | Protected Member Functions | List of all members
mfem::ParL2FaceRestriction Class Reference

Operator that extracts Face degrees of freedom in parallel. More...

#include <prestriction.hpp>

Inheritance diagram for mfem::ParL2FaceRestriction:
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Collaboration diagram for mfem::ParL2FaceRestriction:
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Public Member Functions

 ParL2FaceRestriction (const ParFiniteElementSpace &fes, ElementDofOrdering ordering, FaceType type, L2FaceValues m=L2FaceValues::DoubleValued)
 Constructs an ParL2FaceRestriction. More...
 
void Mult (const Vector &x, Vector &y) const override
 Scatter the degrees of freedom, i.e. goes from L-Vector to face E-Vector. More...
 
void FillI (SparseMatrix &mat, const bool keep_nbr_block=false) const override
 
void FillI (SparseMatrix &mat, SparseMatrix &face_mat) const
 
void FillJAndData (const Vector &ea_data, SparseMatrix &mat, SparseMatrix &face_mat) const
 
void FillJAndData (const Vector &fea_data, SparseMatrix &mat, const bool keep_nbr_block=false) const override
 Fill the J and Data arrays of the SparseMatrix corresponding to the sparsity pattern given by this ParL2FaceRestriction, and the values of fea_data. More...
 
void DoubleValuedConformingMult (const Vector &x, Vector &y) const override
 Scatter the degrees of freedom, i.e. goes from L-Vector to face E-Vector. Should only be used with conforming faces and when: m == L2FacesValues::DoubleValued. More...
 
- Public Member Functions inherited from mfem::L2FaceRestriction
 L2FaceRestriction (const FiniteElementSpace &fes, const ElementDofOrdering ordering, const FaceType type, const L2FaceValues m=L2FaceValues::DoubleValued)
 Constructs an L2FaceRestriction. More...
 
void Mult (const Vector &x, Vector &y) const override
 Scatter the degrees of freedom, i.e. goes from L-Vector to face E-Vector. More...
 
void AddMultTranspose (const Vector &x, Vector &y, const double a=1.0) const override
 Gather the degrees of freedom, i.e. goes from face E-Vector to L-Vector. More...
 
virtual void AddFaceMatricesToElementMatrices (const Vector &fea_data, Vector &ea_data) const
 This methods adds the DG face matrices to the element matrices. More...
 
void SingleValuedConformingMult (const Vector &x, Vector &y) const
 Scatter the degrees of freedom, i.e. goes from L-Vector to face E-Vector. Should only be used with conforming faces and when: m == L2FacesValues::SingleValued. More...
 
void SingleValuedConformingAddMultTranspose (const Vector &x, Vector &y) const
 Gather the degrees of freedom, i.e. goes from face E-Vector to L-Vector. Should only be used with conforming faces and when: m == L2FacesValues::SingleValued. More...
 
void DoubleValuedConformingAddMultTranspose (const Vector &x, Vector &y) const
 Gather the degrees of freedom, i.e. goes from face E-Vector to L-Vector. Should only be used with conforming faces and when: m == L2FacesValues::DoubleValued. More...
 
virtual void AddMultTranspose (const Vector &x, Vector &y, const double a=1.0) const override=0
 Add the face degrees of freedom x to the element degrees of freedom y. More...
 
- Public Member Functions inherited from mfem::FaceRestriction
 FaceRestriction ()
 
 FaceRestriction (int h, int w)
 
virtual ~FaceRestriction ()
 
virtual void AddMultTransposeInPlace (Vector &x, Vector &y) const
 Add the face degrees of freedom x to the element degrees of freedom y. Perform the same computation as AddMultTranspose, but x is invalid after calling this method. More...
 
void MultTranspose (const Vector &x, Vector &y) const override
 Set the face degrees of freedom in the element degrees of freedom y to the values given in x. More...
 
- Public Member Functions inherited from mfem::Operator
void InitTVectors (const Operator *Po, const Operator *Ri, const Operator *Pi, Vector &x, Vector &b, Vector &X, Vector &B) const
 Initializes memory for true vectors of linear system. More...
 
 Operator (int s=0)
 Construct a square Operator with given size s (default 0). More...
 
 Operator (int h, int w)
 Construct an Operator with the given height (output size) and width (input size). More...
 
int Height () const
 Get the height (size of output) of the Operator. Synonym with NumRows(). More...
 
int NumRows () const
 Get the number of rows (size of output) of the Operator. Synonym with Height(). More...
 
int Width () const
 Get the width (size of input) of the Operator. Synonym with NumCols(). More...
 
int NumCols () const
 Get the number of columns (size of input) of the Operator. Synonym with Width(). More...
 
virtual MemoryClass GetMemoryClass () const
 Return the MemoryClass preferred by the Operator. More...
 
virtual void AddMult (const Vector &x, Vector &y, const double a=1.0) const
 Operator application: y+=A(x) (default) or y+=a*A(x). More...
 
virtual void ArrayMult (const Array< const Vector *> &X, Array< Vector *> &Y) const
 Operator application on a matrix: Y=A(X). More...
 
virtual void ArrayMultTranspose (const Array< const Vector *> &X, Array< Vector *> &Y) const
 Action of the transpose operator on a matrix: Y=A^t(X). More...
 
virtual void ArrayAddMult (const Array< const Vector *> &X, Array< Vector *> &Y, const double a=1.0) const
 Operator application on a matrix: Y+=A(X) (default) or Y+=a*A(X). More...
 
virtual void ArrayAddMultTranspose (const Array< const Vector *> &X, Array< Vector *> &Y, const double a=1.0) const
 Operator transpose application on a matrix: Y+=A^t(X) (default) or Y+=a*A^t(X). More...
 
virtual OperatorGetGradient (const Vector &x) const
 Evaluate the gradient operator at the point x. The default behavior in class Operator is to generate an error. More...
 
virtual void AssembleDiagonal (Vector &diag) const
 Computes the diagonal entries into diag. Typically, this operation only makes sense for linear Operators. In some cases, only an approximation of the diagonal is computed. More...
 
virtual const OperatorGetProlongation () const
 Prolongation operator from linear algebra (linear system) vectors, to input vectors for the operator. NULL means identity. More...
 
virtual const OperatorGetRestriction () const
 Restriction operator from input vectors for the operator to linear algebra (linear system) vectors. NULL means identity. More...
 
virtual const OperatorGetOutputProlongation () const
 Prolongation operator from linear algebra (linear system) vectors, to output vectors for the operator. NULL means identity. More...
 
virtual const OperatorGetOutputRestrictionTranspose () const
 Transpose of GetOutputRestriction, directly available in this form to facilitate matrix-free RAP-type operators. More...
 
virtual const OperatorGetOutputRestriction () const
 Restriction operator from output vectors for the operator to linear algebra (linear system) vectors. NULL means identity. More...
 
void FormLinearSystem (const Array< int > &ess_tdof_list, Vector &x, Vector &b, Operator *&A, Vector &X, Vector &B, int copy_interior=0)
 Form a constrained linear system using a matrix-free approach. More...
 
void FormRectangularLinearSystem (const Array< int > &trial_tdof_list, const Array< int > &test_tdof_list, Vector &x, Vector &b, Operator *&A, Vector &X, Vector &B)
 Form a column-constrained linear system using a matrix-free approach. More...
 
virtual void RecoverFEMSolution (const Vector &X, const Vector &b, Vector &x)
 Reconstruct a solution vector x (e.g. a GridFunction) from the solution X of a constrained linear system obtained from Operator::FormLinearSystem() or Operator::FormRectangularLinearSystem(). More...
 
void FormSystemOperator (const Array< int > &ess_tdof_list, Operator *&A)
 Return in A a parallel (on truedofs) version of this square operator. More...
 
void FormRectangularSystemOperator (const Array< int > &trial_tdof_list, const Array< int > &test_tdof_list, Operator *&A)
 Return in A a parallel (on truedofs) version of this rectangular operator (including constraints). More...
 
void FormDiscreteOperator (Operator *&A)
 Return in A a parallel (on truedofs) version of this rectangular operator. More...
 
void PrintMatlab (std::ostream &out, int n, int m=0) const
 Prints operator with input size n and output size m in Matlab format. More...
 
virtual void PrintMatlab (std::ostream &out) const
 Prints operator in Matlab format. More...
 
virtual ~Operator ()
 Virtual destructor. More...
 
Type GetType () const
 Return the type ID of the Operator class. More...
 

Protected Member Functions

 ParL2FaceRestriction (const ParFiniteElementSpace &fes, ElementDofOrdering ordering, FaceType type, L2FaceValues m, bool build)
 Constructs an ParL2FaceRestriction. More...
 
- Protected Member Functions inherited from mfem::L2FaceRestriction
 L2FaceRestriction (const FiniteElementSpace &fes, const ElementDofOrdering ordering, const FaceType type, const L2FaceValues m, bool build)
 Constructs an L2FaceRestriction. More...
 
void CheckFESpace (const ElementDofOrdering ordering)
 Verify that L2FaceRestriction is build from an L2 FESpace. More...
 
void SetFaceDofsScatterIndices1 (const Mesh::FaceInformation &face, const int face_index)
 Set the scattering indices of elem1, and increment the offsets for the face described by the face. The ordering of the face dofs of elem1 is lexicographic relative to elem1. More...
 
void PermuteAndSetFaceDofsScatterIndices2 (const Mesh::FaceInformation &face, const int face_index)
 Permute and set the scattering indices of elem2, and increment the offsets for the face described by the face. The permutation orders the dofs of elem2 lexicographically as the ones of elem1. More...
 
void PermuteAndSetSharedFaceDofsScatterIndices2 (const Mesh::FaceInformation &face, const int face_index)
 Permute and set the scattering indices of elem2 for the shared face described by the face. The permutation orders the dofs of elem2 as the ones of elem1. More...
 
void SetBoundaryDofsScatterIndices2 (const Mesh::FaceInformation &face, const int face_index)
 Set the scattering indices of elem2 for the boundary face described by the face. More...
 
void SetFaceDofsGatherIndices1 (const Mesh::FaceInformation &face, const int face_index)
 Set the gathering indices of elem1 for the interior face described by the face. More...
 
void PermuteAndSetFaceDofsGatherIndices2 (const Mesh::FaceInformation &face, const int face_index)
 Permute and set the gathering indices of elem2 for the interior face described by the face. The permutation orders the dofs of elem2 as the ones of elem1. More...
 
- Protected Member Functions inherited from mfem::Operator
void FormConstrainedSystemOperator (const Array< int > &ess_tdof_list, ConstrainedOperator *&Aout)
 see FormSystemOperator() More...
 
void FormRectangularConstrainedSystemOperator (const Array< int > &trial_tdof_list, const Array< int > &test_tdof_list, RectangularConstrainedOperator *&Aout)
 see FormRectangularSystemOperator() More...
 
OperatorSetupRAP (const Operator *Pi, const Operator *Po)
 Returns RAP Operator of this, using input/output Prolongation matrices Pi corresponds to "P", Po corresponds to "Rt". More...
 

Additional Inherited Members

- Public Types inherited from mfem::Operator
enum  DiagonalPolicy { DIAG_ZERO, DIAG_ONE, DIAG_KEEP }
 Defines operator diagonal policy upon elimination of rows and/or columns. More...
 
enum  Type {
  ANY_TYPE, MFEM_SPARSEMAT, Hypre_ParCSR, PETSC_MATAIJ,
  PETSC_MATIS, PETSC_MATSHELL, PETSC_MATNEST, PETSC_MATHYPRE,
  PETSC_MATGENERIC, Complex_Operator, MFEM_ComplexSparseMat, Complex_Hypre_ParCSR,
  Complex_DenseMat, MFEM_Block_Matrix, MFEM_Block_Operator
}
 Enumeration defining IDs for some classes derived from Operator. More...
 
- Protected Attributes inherited from mfem::L2FaceRestriction
const FiniteElementSpacefes
 
const int nf
 
const int ne
 
const int vdim
 
const bool byvdim
 
const int face_dofs
 
const int elem_dofs
 
const int nfdofs
 
const int ndofs
 
const FaceType type
 
const L2FaceValues m
 
Array< int > scatter_indices1
 
Array< int > scatter_indices2
 
Array< int > gather_offsets
 
Array< int > gather_indices
 
Array< int > face_map
 
- Protected Attributes inherited from mfem::Operator
int height
 Dimension of the output / number of rows in the matrix. More...
 
int width
 Dimension of the input / number of columns in the matrix. More...
 

Detailed Description

Operator that extracts Face degrees of freedom in parallel.

Objects of this type are typically created and owned by ParFiniteElementSpace objects, see ParFiniteElementSpace::GetFaceRestriction().

Definition at line 139 of file prestriction.hpp.

Constructor & Destructor Documentation

◆ ParL2FaceRestriction() [1/2]

mfem::ParL2FaceRestriction::ParL2FaceRestriction ( const ParFiniteElementSpace fes,
ElementDofOrdering  ordering,
FaceType  type,
L2FaceValues  m,
bool  build 
)
protected

Constructs an ParL2FaceRestriction.

Parameters
[in]fesThe ParFiniteElementSpace on which this operates
[in]orderingRequest a specific ordering
[in]typeRequest internal or boundary faces dofs
[in]mRequest the face dofs for elem1, or both elem1 and elem2
[in]buildRequest the ParL2FaceRestriction to compute the scatter/gather indices. False should only be used when inheriting from ParL2FaceRestriction.

Definition at line 274 of file prestriction.cpp.

◆ ParL2FaceRestriction() [2/2]

mfem::ParL2FaceRestriction::ParL2FaceRestriction ( const ParFiniteElementSpace fes,
ElementDofOrdering  ordering,
FaceType  type,
L2FaceValues  m = L2FaceValues::DoubleValued 
)

Constructs an ParL2FaceRestriction.

Parameters
[in]fesThe ParFiniteElementSpace on which this operates
[in]orderingRequest a specific ordering
[in]typeRequest internal or boundary faces dofs
[in]mRequest the face dofs for elem1, or both elem1 and elem2

Definition at line 291 of file prestriction.cpp.

Member Function Documentation

◆ DoubleValuedConformingMult()

void mfem::ParL2FaceRestriction::DoubleValuedConformingMult ( const Vector x,
Vector y 
) const
overridevirtual

Scatter the degrees of freedom, i.e. goes from L-Vector to face E-Vector. Should only be used with conforming faces and when: m == L2FacesValues::DoubleValued.

Parameters
[in]xThe L-vector degrees of freedom.
[out]yThe face E-Vector degrees of freedom with the given format: face_dofs x vdim x 2 x nf where nf is the number of interior or boundary faces requested by type in the constructor. The face_dofs are ordered according to the given ElementDofOrdering.

Reimplemented from mfem::L2FaceRestriction.

Definition at line 298 of file prestriction.cpp.

◆ FillI() [1/2]

void mfem::ParL2FaceRestriction::FillI ( SparseMatrix mat,
const bool  keep_nbr_block = false 
) const
overridevirtual

Fill the I array of SparseMatrix corresponding to the sparsity pattern given by this ParL2FaceRestriction.

Parameters
[in,out]matThe sparse matrix for which we want to initialize the row offsets.
[in]keep_nbr_blockWhen set to true the SparseMatrix will include the rows (in addition to the columns) corresponding to face-neighbor dofs. The default behavior is to disregard those rows.

Reimplemented from mfem::L2FaceRestriction.

Reimplemented in mfem::ParNCL2FaceRestriction.

Definition at line 371 of file prestriction.cpp.

◆ FillI() [2/2]

void mfem::ParL2FaceRestriction::FillI ( SparseMatrix mat,
SparseMatrix face_mat 
) const

Fill the I array of SparseMatrix corresponding to the sparsity pattern given by this ParL2FaceRestriction. mat contains the interior dofs contribution, the face_mat contains the shared dofs contribution.

Definition at line 400 of file prestriction.cpp.

◆ FillJAndData() [1/2]

void mfem::ParL2FaceRestriction::FillJAndData ( const Vector ea_data,
SparseMatrix mat,
SparseMatrix face_mat 
) const

Fill the J and Data arrays of SparseMatrix corresponding to the sparsity pattern given by this ParL2FaceRestriction, and the values of ea_data. mat contains the interior dofs contribution, the face_mat contains the shared dofs contribution.

Definition at line 497 of file prestriction.cpp.

◆ FillJAndData() [2/2]

void mfem::ParL2FaceRestriction::FillJAndData ( const Vector fea_data,
SparseMatrix mat,
const bool  keep_nbr_block = false 
) const
overridevirtual

Fill the J and Data arrays of the SparseMatrix corresponding to the sparsity pattern given by this ParL2FaceRestriction, and the values of fea_data.

Parameters
[in]fea_dataThe dense matrices representing the local operators on each face. The format is: face_dofs x face_dofs x 2 x nf. On each face the first local matrix corresponds to the contribution of elem1 on elem2, and the second to the contribution of elem2 on elem1.
[in,out]matThe sparse matrix that is getting filled.
[in]keep_nbr_blockWhen set to true the SparseMatrix will include the rows (in addition to the columns) corresponding to face-neighbor dofs. The default behavior is to disregard those rows.

Reimplemented from mfem::L2FaceRestriction.

Reimplemented in mfem::ParNCL2FaceRestriction.

Definition at line 452 of file prestriction.cpp.

◆ Mult()

void mfem::ParL2FaceRestriction::Mult ( const Vector x,
Vector y 
) const
overridevirtual

Scatter the degrees of freedom, i.e. goes from L-Vector to face E-Vector.

Parameters
[in]xThe L-vector degrees of freedom.
[out]yThe face E-Vector degrees of freedom with the given format: if L2FacesValues::DoubleValued (face_dofs x vdim x 2 x nf), if L2FacesValues::SingleValued (face_dofs x vdim x nf), where nf is the number of interior or boundary faces requested by type in the constructor. The face_dofs are ordered according to the given ElementDofOrdering.

Implements mfem::FaceRestriction.

Reimplemented in mfem::ParNCL2FaceRestriction.

Definition at line 352 of file prestriction.cpp.


The documentation for this class was generated from the following files: