PetscDSGetBoundary#
Gets a boundary condition to the model
Synopsis#
#include "petscds.h"
PetscErrorCode PetscDSGetBoundary(PetscDS ds, PetscInt bd, PetscWeakForm *wf, DMBoundaryConditionType *type, const char *name[], DMLabel *label, PetscInt *Nv, const PetscInt *values[], PetscInt *field, PetscInt *Nc, const PetscInt *comps[], void (**func)(void), void (**func_t)(void), void **ctx)
Input Parameters#
ds - The
PetscDS
objectbd - The BC number
Output Parameters#
wf - The
PetscWeakForm
holding the pointwise functionstype - The type of condition, e.g.
DM_BC_ESSENTIAL
/DM_BC_ESSENTIAL_FIELD
(Dirichlet), orDM_BC_NATURAL
(Neumann)name - The BC name
label - The label defining constrained points
Nv - The number of
DMLabel
ids for constrained pointsvalues - An array of ids for constrained points
field - The field to constrain
Nc - The number of constrained field components
comps - An array of constrained component numbers
func - A pointwise function giving boundary values
func_t - A pointwise function giving the time derivative of the boundary values
ctx - An optional user context for bcFunc
Options Database Keys#
-bc_
- -bc_
_comp Overrides the boundary components-
See Also#
PetscDS
, PetscWeakForm
, DMBoundaryConditionType
, PetscDSAddBoundary()
, DMLabel
Level#
developer
Location#
Examples#
src/ts/tutorials/ex53.c
src/snes/tutorials/ex24.c
src/snes/tutorials/ex17.c
src/snes/tutorials/ex12.c
src/snes/tutorials/ex71.c
src/snes/tutorials/ex77.c
src/ts/tutorials/ex76.c
src/snes/tutorials/ex56.c
src/snes/tutorials/ex27.c
Index of all DT routines
Table of Contents for all manual pages
Index of all manual pages