petscmaster 20200919
DMPlexGetConeRecursive
Expand each given point into its cone points and do that recursively until we end up just with vertices (DAG points of depth 0, i.e. without cones).
Synopsis
#include "petscdmplex.h"
PetscErrorCode DMPlexGetConeRecursive(DM dm, IS points, PetscInt *depth, IS *expandedPoints[], PetscSection *sections[])
Not collective
Input Parameters
 dm   The DMPlex

 points   The IS of points, which must lie in the chart set with DMPlexSetChart()

Output Parameter
 depth   (optional) Size of the output arrays, equal to DMPlex depth, returned by DMPlexGetDepth()

 expandedPoints   (optional) An array of index sets with recursively expanded cones

 sections   (optional) An array of sections which describe mappings from points to their cone points

Notes
Like DMPlexGetConeTuple() but recursive.
Array expandedPoints has size equal to depth. Each expandedPoints[d] contains DAG points with maximum depth d, recursively conewise expanded from the input points.
For example, for d=0 it contains only vertices, for d=1 it can contain vertices and edges, etc.
Array section has size equal to depth. Each PetscSection sections[d] realizes mapping from expandedPoints[d+1] (section points) to expandedPoints[d] (section dofs) as follows
(1) DAG points in expandedPoints[d+1] with depth d+1 to their cone points in expandedPoints[d];
(2) DAG points in expandedPoints[d+1] with depth in [0,d] to the same points in expandedPoints[d].
See Also
DMPlexCreate(), DMPlexGetCone(), DMPlexGetConeTuple(), DMPlexRestoreConeRecursive(), DMPlexGetConeRecursiveVertices(), DMPlexGetDepth()
Level
advanced
Location
src/dm/impls/plex/plex.c
Index of all DMPLEX routines
Table of Contents for all manual pages
Index of all manual pages