mfem::MatrixArrayCoefficient Class Reference

Matrix coefficient defined by a matrix of scalar coefficients. Coefficients that are not set will evaluate to zero in the vector. The coefficient is stored as a flat Array with indexing (i,j) -> i*width+j. More...

#include <coefficient.hpp>

Inheritance diagram for mfem::MatrixArrayCoefficient:

Collaboration diagram for mfem::MatrixArrayCoefficient:

Public Member Functions
	MatrixArrayCoefficient (int dim)
	Construct a coefficient matrix of dimensions dim * dim. The actual coefficients still need to be added with Set(). More...
void	SetTime (double t)
	Set the time for internally stored coefficients. More...
Coefficient *	GetCoeff (int i, int j)
	Get the coefficient located at (i,j) in the matrix. More...
void	Set (int i, int j, Coefficient *c, bool own=true)
	Set the coefficient located at (i,j) in the matrix. By default by default this will take ownership of the Coefficient passed in, but this can be overridden with the own parameter. More...
double	Eval (int i, int j, ElementTransformation &T, const IntegrationPoint &ip)
virtual void	Eval (DenseMatrix &K, ElementTransformation &T, const IntegrationPoint &ip)
	Evaluate the matrix coefficient ip. More...
virtual	~MatrixArrayCoefficient ()
virtual void	Eval (DenseMatrix &K, ElementTransformation &T, const IntegrationPoint &ip)=0
	Evaluate the matrix coefficient in the element described by T at the point ip, storing the result in K. More...
Public Member Functions inherited from mfem::MatrixCoefficient
	MatrixCoefficient (int dim, bool symm=false)
	Construct a dim x dim matrix coefficient. More...
	MatrixCoefficient (int h, int w, bool symm=false)
	Construct a h x w matrix coefficient. More...
double	GetTime ()
	Get the time for time dependent coefficients. More...
int	GetHeight () const
	Get the height of the matrix. More...
int	GetWidth () const
	Get the width of the matrix. More...
int	GetVDim () const
	For backward compatibility get the width of the matrix. More...
bool	IsSymmetric () const
virtual void	Project (QuadratureFunction &qf, bool transpose=false)
	Fill the QuadratureFunction qf by evaluating the coefficient at the quadrature points. The matrix will be transposed or not according to the boolean argument transpose. More...
virtual void	EvalSymmetric (Vector &K, ElementTransformation &T, const IntegrationPoint &ip)
	(DEPRECATED) Evaluate a symmetric matrix coefficient. More...
virtual	~MatrixCoefficient ()

Additional Inherited Members
Protected Attributes inherited from mfem::MatrixCoefficient
int	height
int	width
double	time
bool	symmetric

Detailed Description

Matrix coefficient defined by a matrix of scalar coefficients. Coefficients that are not set will evaluate to zero in the vector. The coefficient is stored as a flat Array with indexing (i,j) -> i*width+j.

Definition at line 1167 of file coefficient.hpp.

Constructor & Destructor Documentation

MatrixArrayCoefficient()

mfem::MatrixArrayCoefficient::MatrixArrayCoefficient ( int  dim )

explicit

Construct a coefficient matrix of dimensions dim * dim. The actual coefficients still need to be added with Set().

Definition at line 828 of file coefficient.cpp.

~MatrixArrayCoefficient()

mfem::MatrixArrayCoefficient::~MatrixArrayCoefficient ( )

virtual

Definition at line 856 of file coefficient.cpp.

Member Function Documentation

Eval() [1/3]

virtual void mfem::MatrixCoefficient::Eval

Evaluate the matrix coefficient in the element described by T at the point ip, storing the result in K.

Note

When this method is called, the caller must make sure that the IntegrationPoint associated with T is the same as ip. This can be achieved by calling T.SetIntPoint(&ip).

Eval() [2/3]

double mfem::MatrixArrayCoefficient::Eval ( int  i, int  j, ElementTransformation &  T, const IntegrationPoint &  ip  )

inline

Evaluate coefficient located at (i,j) in the matrix using integration point ip.

Definition at line 1193 of file coefficient.hpp.

Eval() [3/3]

void mfem::MatrixArrayCoefficient::Eval ( DenseMatrix &  K, ElementTransformation &  T, const IntegrationPoint &  ip  )

virtual

Evaluate the matrix coefficient ip.

Implements mfem::MatrixCoefficient.

Definition at line 864 of file coefficient.cpp.

GetCoeff()

Coefficient* mfem::MatrixArrayCoefficient::GetCoeff ( int  i, int  j  )

inline

Get the coefficient located at (i,j) in the matrix.

Definition at line 1182 of file coefficient.hpp.

Set()

void mfem::MatrixArrayCoefficient::Set	(	int	i,
		int	j,
		Coefficient *	c,
		bool	own = true
	)

Set the coefficient located at (i,j) in the matrix. By default by default this will take ownership of the Coefficient passed in, but this can be overridden with the own parameter.

Definition at line 849 of file coefficient.cpp.

SetTime()

void mfem::MatrixArrayCoefficient::SetTime ( double  t )

virtual

Set the time for internally stored coefficients.

Reimplemented from mfem::MatrixCoefficient.

Definition at line 840 of file coefficient.cpp.

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

• fem/coefficient.hpp
• fem/coefficient.cpp