PetscSectionGetFieldPointSyms#
Get the symmetries for a set of points in a field of a PetscSection
under specific orientations.
Synopsis#
#include "petscsection.h"
PetscErrorCode PetscSectionGetFieldPointSyms(PetscSection section, PetscInt field, PetscInt numPoints, const PetscInt *points, const PetscInt ***perms, const PetscScalar ***rots)
Not Collective
Input Parameters#
section - the section
field - the field of the section
numPoints - the number of points
points - an array of size 2 * numPoints, containing a list of (point, orientation) pairs. (An orientation is an arbitrary integer: its interpretation is up to sym. Orientations are used by
DM
: for their interpretation in that context, seeDMPlexGetConeOrientation()
).
Output Parameters#
perms - The permutations for the given orientations (or NULL if there is no symmetry or the permutation is the identity).
rots - The field rotations symmetries for the given orientations (or NULL if there is no symmetry or the rotations are all identity).
See Also#
PetscSection, PetscSectionSym
, PetscSectionGetPointSyms()
, PetscSectionRestoreFieldPointSyms()
Level#
developer
Location#
src/vec/is/section/interface/section.c
Index of all PetscSection routines
Table of Contents for all manual pages
Index of all manual pages