PetscSectionGetPointLayout#

Get a PetscLayout for the points with nonzero dof counts of the unnamed default field within this PetscSections local chart

Synopsis#

#include "petscsection.h"   
PetscErrorCode PetscSectionGetPointLayout(MPI_Comm comm, PetscSection s, PetscLayout *layout)

Collective

Input Parameters#

Output Parameter#

  • layout - The point layout for the data that defines the section

Notes#

PetscSectionGetValueLayout() provides similar information but counting the total number of degrees of freedom on the MPI process (excluding constrained degrees of freedom).

This count includes constrained degrees of freedom

This is usually called on the default global section.

Example#

     The chart is [2,5), point 2 has 2 dof, point 3 has 0 dof, point 4 has 1 dof
     The local size of the `PetscLayout` is 2 since 2 points have a non-zero number of dof

Developer Notes#

I find the names of these two functions extremely non-informative

See Also#

PetscSection, PetscSection, PetscSectionGetValueLayout(), PetscSectionCreate()

Level#

advanced

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