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...
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 ()
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...
void	SetTime (double t)
	Set the time for time dependent coefficients. 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	EvalSymmetric (Vector &K, ElementTransformation &T, const IntegrationPoint &ip)
	Evaluate the upper triangular entries of the matrix coefficient in the symmetric case, similarly to Eval. Matrix entry (i,j) is stored in K[j - i + os_i] for 0 <= i <= j < width, os_0 = 0, os_{i+1} = os_i + width - i. That is, K = {M(0,0), ..., M(0,w-1), M(1,1), ..., M(1,w-1), ..., M(w-1,w-1) with w = width. 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 831 of file coefficient.hpp.

Constructor & Destructor Documentation

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 374 of file coefficient.cpp.

mfem::MatrixArrayCoefficient::~MatrixArrayCoefficient ( )

virtual

Definition at line 393 of file coefficient.cpp.

Member Function Documentation

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 852 of file coefficient.hpp.

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

virtual

Evaluate the matrix coefficient ip.

Implements mfem::MatrixCoefficient.

Definition at line 401 of file coefficient.cpp.

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

inline

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

Definition at line 843 of file coefficient.hpp.

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 386 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