petsc-3.13.6 2020-09-29

DMPlexGetAdjacency

Return all points adjacent to the given point

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

	dm	- The DM object
	p	- The point
	adjSize	- The maximum size of adj if it is non-NULL, or PETSC_DETERMINE
	adj	- Either NULL so that the array is allocated, or an existing array with size adjSize

	adjSize	- The number of adjacent points
	adj	- The adjacent points

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

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