DMPlexGetAdjacency#

Return all points adjacent to the given point

Synopsis#

#include "petscdmplex.h"   
#include "petscdmlabel.h"  
PetscErrorCode DMPlexGetAdjacency(DM dm, PetscInt p, PetscInt *adjSize, PetscInt *adj[])

Input Parameters#

dm - The DM object
p - The point

Input/Output Parameters#

adjSize - The maximum size of adj if it is non-NULL, or PETSC_DETERMINE; on output the number of adjacent points
adj - Either NULL so that the array is allocated, or an existing array with size adjSize; on output contains the adjacent points

Notes#

The user must PetscFree() the adj array if it was not passed in.

See Also#

DMPLEX, DMSetAdjacency(), DMPlexDistribute(), DMCreateMatrix(), DMPlexPreallocateOperator()

Level#

advanced

Location#

src/dm/impls/plex/plexdistribute.c

Implementations#

DMPlexGetAdjacency_Internal in src/dm/impls/plex/plexdistribute.c

Index of all DMPlex routines
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Index of all manual pages