petsc-3.12.5 2020-03-29
DMGetBoundary
Get a model boundary condition
Synopsis
#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
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| numcomps | - The number of constrained field components
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| comps | - An array of constrained component numbers
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| bcFunc | - A pointwise function giving boundary values
|
| numids | - The number of DMLabel ids for constrained points
|
| ids | - An array of ids for constrained points
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| 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
DMAddBoundary()
Level
developer
Location
src/dm/interface/dm.c
Index of all DM routines
Table of Contents for all manual pages
Index of all manual pages