petsc-3.14.5 2021-03-03
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# DMPlexGetTreeParent

get the parent of a point in the tree describing the point hierarchy (not the DAG)

### Synopsis

    #include "petscdmplex.h"
    PetscErrorCode DMPlexGetTreeParent(DM dm, PetscInt point, PetscInt *parent, PetscInt *childID)

### Input Parameters

| dm | - the DMPlex object
| point | - the query point

### Output Parameters

| parent | - if not NULL, set to the parent of the point, or the point itself if the point does not have a parent
| childID | - if not NULL, set to the child ID of the point with respect to its parent, or 0 if the point does not have a parent

### See Also

DMPlexSetTree(), DMPlexGetTree(), DMPlexGetTreeChildren()

### Level

intermediate

### Location

src/dm/impls/plex/plextree.c
Index of all DMPLEX routines
Table of Contents for all manual pages
Index of all manual pages