PetscSectionCreateSubmeshSection#

Create a new, smaller section with support on the submesh

Synopsis#

#include "petscsection.h"   
PetscErrorCode PetscSectionCreateSubmeshSection(PetscSection s, IS subpointMap, PetscSection *subs)

Collective

Input Parameters#

  • s - the PetscSection

  • subpointMap - a sorted list of points in the original mesh which are in the submesh

Output Parameter#

  • subs - the subsection

Notes#

The points are renumbered from 0, and the section offsets now refer to a new, smaller vector. That is the chart of subs is [0,sizeof(subpointmap))

Compare this with PetscSectionCreateSubdomainSection() that does not map the points numbers to start at zero but leaves them as before

Developer Note#

The use of the term Submesh is confusing and needs clarification, it is not specific to meshes. It appears to be just a subset of the chart of the original PetscSection

See Also#

PetscSection, PetscSection, PetscSectionCreateSubdomainSection(), PetscSectionCreateSubsection(), DMPlexGetSubpointMap(), PetscSectionCreate()

Level#

advanced

Location#

src/vec/is/section/interface/section.c

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Index of all PetscSection routines
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Index of all manual pages