PETSc version 3.17.4
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# DMPlexSetTree

set the tree that describes the hierarchy of non-conforming mesh points. This routine also creates the point-to-point constraints determined by the tree: a point is constained to the points in the closure of its tree root.

### Synopsis

    #include "petscdmplex.h"
    PetscErrorCode DMPlexSetTree(DM dm, PetscSection parentSection, PetscInt parents[], PetscInt childIDs[])

Collective on dm

### Input Parameters

| dm | - the DMPlex object
| parentSection | - a section describing the tree: a point has a parent if it has 1 dof in the section; the section offset indexes the parent and childID list; the reference count of parentSection is incremented
| parents | - a list of the point parents; copied, can be destroyed
| childIDs | - identifies the relationship of the child point to the parent point; if there is a reference tree, then the child corresponds to the point in the reference tree with index childIDs; copied, can be destroyed

### See Also

DMPlexGetTree(), DMPlexSetReferenceTree(), DMPlexSetAnchors(), DMPlexGetTreeParent(), DMPlexGetTreeChildren()

### Level

intermediate

### Location

src/dm/impls/plex/plextree.c

### Implementations

DMPlexSetTree_Internal in src/dm/impls/plex/plextree.c
Index of all DMPLEX routines
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Index of all manual pages