PETSc version 3.15.5
DMGetAdjacency
Returns the flags for determining variable influence
Synopsis
#include "petscdm.h"
#include "petscdmlabel.h"
#include "petscds.h"
PetscErrorCode DMGetAdjacency(DM dm, PetscInt f, PetscBool *useCone, PetscBool *useClosure)
Not collective
Input Parameters
| dm | - The DM object
|
| f | - The field number, or PETSC_DEFAULT for the default adjacency
|
Output Parameter
| useCone | - Flag for variable influence starting with the cone operation
|
| useClosure | - Flag for variable influence using transitive closure
|
Notes
FEM: Two points p and q are adjacent if q \in closure(star(p)), useCone = PETSC_FALSE, useClosure = PETSC_TRUE
FVM: Two points p and q are adjacent if q \in support(p+cone(p)), useCone = PETSC_TRUE, useClosure = PETSC_FALSE
FVM++: Two points p and q are adjacent if q \in star(closure(p)), useCone = PETSC_TRUE, useClosure = PETSC_TRUE
Further explanation can be found in the User's Manual Section on the Influence of Variables on One Another.
See Also
DMSetAdjacency(), DMGetField(), DMSetField()
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