PETSc version 3.17.5
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PetscSectionSymLabelGetStratum

get the symmetries for the orientations of a stratum

Synopsis

#include "petscdmlabel.h"   
#include "petscsection.h"   
PetscErrorCode PetscSectionSymLabelGetStratum(PetscSectionSym sym, PetscInt stratum, PetscInt *size, PetscInt *minOrient, PetscInt *maxOrient, const PetscInt ***perms, const PetscScalar ***rots)
Logically collective on sym

Input Parameters

sym - the section symmetries
stratum - the stratum value in the label that we are assigning symmetries for

Output Parameters

size - the number of dofs for points in the stratum of the label
minOrient - the smallest orientation for a point in this stratum
maxOrient - one greater than the largest orientation for a ppoint in this stratum (i.e., orientations are in the range [minOrient, maxOrient))
perms - NULL if there are no permutations, or (maxOrient - minOrient) permutations, one for each orientation. A NULL permutation is the identity
rots - NULL if there are no rotations, or (maxOrient - minOrient) sets of rotations, one for each orientation. A NULL set of orientations is the identity

See Also

PetscSectionSymLabelSetStratum(), PetscSectionSymCreate(), PetscSectionSetSym(), PetscSectionGetPointSyms(), PetscSectionSymCreateLabel()

Level

developer

Location

src/dm/label/dmlabel.c
Index of all DMLABEL routines
Table of Contents for all manual pages
Index of all manual pages