petsc-3.10.5 2019-03-28
Report Typos and Errors


Get the symmetries for a set of points in a field of a PetscSection under specific orientations.


#include "petscvec.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, see DMPlexGetConeOrientation()).

Output Parameter

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

PetscSectionGetPointSyms(), PetscSectionRestoreFieldPointSyms()




Index of all IS routines
Table of Contents for all manual pages
Index of all manual pages