# DMPlexSetAdjacencyUseAnchors
Define adjacency in the mesh using the point-to-point constraints. 
## Synopsis
```
#include "petscdmplex.h"   
#include "petscdmlabel.h"  
PetscErrorCode DMPlexSetAdjacencyUseAnchors(DM dm, PetscBool useAnchors)
```

## Input Parameters

- ***dm      -*** The DM object
- ***useAnchors -*** Flag to use the constraints.  If PETSC_TRUE, then constrained points are omitted from DMPlexGetAdjacency(), and their anchor points appear in their place.





## See Also
 `DMGetAdjacency()`, `DMSetAdjacency()`, `DMPlexDistribute()`, `DMPlexPreallocateOperator()`, `DMPlexSetAnchors()`

## Level
intermediate

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/dm/impls/plex/plexdistribute.c.html#DMPlexSetAdjacencyUseAnchors">src/dm/impls/plex/plexdistribute.c</A>


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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/dm/impls/plex/plexdistribute.c)


[Index of all DMPlex routines](index.md)  
[Table of Contents for all manual pages](/docs/manualpages/index.md)  
[Index of all manual pages](/docs/manualpages/singleindex.md)  
