petsc-3.6.2 2015-10-02
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# DMPlexSetAdjacencyUseCone

Define adjacency in the mesh using either the cone or the support first

### Synopsis

    #include "petscdmplex.h"
    PetscErrorCode DMPlexSetAdjacencyUseCone(DM dm, PetscBool useCone)

### Input Parameters

| dm | - The DM object
| useCone | - Flag to use the cone first

### 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

### See Also

DMPlexGetAdjacencyUseCone(), DMPlexSetAdjacencyUseClosure(), DMPlexGetAdjacencyUseClosure(), DMPlexDistribute(), DMPlexPreallocateOperator()

Level:intermediate
Location: src/dm/impls/plex/plexdistribute.c
Index of all DM routines
Table of Contents for all manual pages
Index of all manual pages

### Examples

src/ts/examples/tutorials/ex11.c.html