DMPlexGetTreeParent — PETSc 3.21.4 documentation

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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

DMPlex: Unstructured Grids, `DM`, `DMPLEX`, `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