MFEM  v4.2.0
Finite element discretization library
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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:
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Collaboration diagram for mfem::MatrixArrayCoefficient:
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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...
 
CoefficientGetCoeff (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.


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