DMGetDefaultConstraints#

Get the PetscSection and Mat that specify the local constraint interpolation. See DMSetDefaultConstraints() for a description of the purpose of constraint interpolation.

Synopsis#

#include "petscdm.h"          
#include "petscdmlabel.h"     
#include "petscds.h"     
PetscErrorCode DMGetDefaultConstraints(DM dm, PetscSection *section, Mat *mat, Vec *bias)

not Collective

Input Parameter#

dm - The DM

Output Parameters#

section - The PetscSection describing the range of the constraint matrix: relates rows of the constraint matrix to dofs of the default section. Returns NULL if there are no local constraints.
mat - The Mat that interpolates local constraints: its width should be the layout size of the default section. Returns NULL if there are no local constraints.
bias - Vector containing bias to be added to constrained dofs

Note#

This gets borrowed references, so the user should not destroy the PetscSection, Mat, or Vec.

Level#

advanced

Location#

src/dm/interface/dm.c

Index of all DM routines
Table of Contents for all manual pages
Index of all manual pages