MFEM  v4.2.0
Finite element discretization library
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mfem::MatrixSumCoefficient Class Reference

Matrix coefficient defined as the linear combination of two matrices. More...

#include <coefficient.hpp>

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

 MatrixSumCoefficient (MatrixCoefficient &A, MatrixCoefficient &B, double _alpha=1.0, double _beta=1.0)
 Construct with the two coefficients. Result is _alpha * A + _beta * B. More...
 
void SetACoef (MatrixCoefficient &A)
 Reset the first matrix coefficient. More...
 
MatrixCoefficientGetACoef () const
 Return the first matrix coefficient. More...
 
void SetBCoef (MatrixCoefficient &B)
 Reset the second matrix coefficient. More...
 
MatrixCoefficientGetBCoef () const
 Return the second matrix coefficient. More...
 
void SetAlpha (double _alpha)
 Reset the factor in front of the first matrix coefficient. More...
 
double GetAlpha () const
 Return the factor in front of the first matrix coefficient. More...
 
void SetBeta (double _beta)
 Reset the factor in front of the second matrix coefficient. More...
 
double GetBeta () const
 Return the factor in front of the second matrix coefficient. More...
 
virtual void Eval (DenseMatrix &M, ElementTransformation &T, const IntegrationPoint &ip)
 Evaluate the matrix coefficient at ip. 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...
 
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 as the linear combination of two matrices.

Definition at line 1369 of file coefficient.hpp.

Constructor & Destructor Documentation

mfem::MatrixSumCoefficient::MatrixSumCoefficient ( MatrixCoefficient A,
MatrixCoefficient B,
double  _alpha = 1.0,
double  _beta = 1.0 
)

Construct with the two coefficients. Result is _alpha * A + _beta * B.

Definition at line 609 of file coefficient.cpp.

Member Function Documentation

void mfem::MatrixSumCoefficient::Eval ( DenseMatrix M,
ElementTransformation T,
const IntegrationPoint ip 
)
virtual

Evaluate the matrix coefficient at ip.

Implements mfem::MatrixCoefficient.

Definition at line 621 of file coefficient.cpp.

MatrixCoefficient* mfem::MatrixSumCoefficient::GetACoef ( ) const
inline

Return the first matrix coefficient.

Definition at line 1388 of file coefficient.hpp.

double mfem::MatrixSumCoefficient::GetAlpha ( ) const
inline

Return the factor in front of the first matrix coefficient.

Definition at line 1398 of file coefficient.hpp.

MatrixCoefficient* mfem::MatrixSumCoefficient::GetBCoef ( ) const
inline

Return the second matrix coefficient.

Definition at line 1393 of file coefficient.hpp.

double mfem::MatrixSumCoefficient::GetBeta ( ) const
inline

Return the factor in front of the second matrix coefficient.

Definition at line 1403 of file coefficient.hpp.

void mfem::MatrixSumCoefficient::SetACoef ( MatrixCoefficient A)
inline

Reset the first matrix coefficient.

Definition at line 1386 of file coefficient.hpp.

void mfem::MatrixSumCoefficient::SetAlpha ( double  _alpha)
inline

Reset the factor in front of the first matrix coefficient.

Definition at line 1396 of file coefficient.hpp.

void mfem::MatrixSumCoefficient::SetBCoef ( MatrixCoefficient B)
inline

Reset the second matrix coefficient.

Definition at line 1391 of file coefficient.hpp.

void mfem::MatrixSumCoefficient::SetBeta ( double  _beta)
inline

Reset the factor in front of the second matrix coefficient.

Definition at line 1401 of file coefficient.hpp.


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