petsc-3.9.2 2018-05-20
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Get a model boundary condition


#include "petscdm.h"          
#include "petscdmlabel.h"     
#include "petscds.h"     
PetscErrorCode DMGetBoundary(DM dm, PetscInt bd, DMBoundaryConditionType *type, const char **name, const char **labelname, PetscInt *field, PetscInt *numcomps, const PetscInt **comps, void (**func)(void), PetscInt *numids, const PetscInt **ids, void **ctx)

Input Parameters

dm - The mesh object
bd - The BC number

Output Parameters

type - The type of condition, e.g. DM_BC_ESSENTIAL_ANALYTIC/DM_BC_ESSENTIAL_FIELD (Dirichlet), or DM_BC_NATURAL (Neumann)
name - The BC name
labelname - The label defining constrained points
field - The field to constrain
numcomps - The number of constrained field components
comps - An array of constrained component numbers
bcFunc - A pointwise function giving boundary values
numids - The number of DMLabel ids for constrained points
ids - An array of ids for constrained points
ctx - An optional user context for bcFunc

Options Database Keys

-bc_<boundary name> <num> - Overrides the boundary ids
-bc_<boundary name>_comp <num> - Overrides the boundary components

See Also





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