petsc-3.8.4 2018-03-24
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DMPlexGetOrdering

 Calculate a reordering of the mesh

Synopsis

#include "petscdmplex.h"   
#include "petscmat.h"      
PetscErrorCode DMPlexGetOrdering(DM dm, MatOrderingType otype, DMLabel label, IS *perm)
Collective on DM

Input Parameter

    MATORDERINGNATURAL - Natural

    MATORDERINGND - Nested Dissection

    MATORDERING1WD - One-way Dissection

    MATORDERINGRCM - Reverse Cuthill-McKee

    MATORDERINGQMD - Quotient Minimum Degree
dm - The DMPlex object
otype - type of reordering, one of the following:
label - [Optional] Label used to segregate ordering into sets, or NULL

Output Parameter

perm -The point permutation as an IS, perm[old point number] = new point number

Note: The label is used to group sets of points together by label value. This makes it easy to reorder a mesh which has different types of cells, and then loop over each set of reordered cells for assembly.

Keywords

mesh

See Also

MatGetOrdering()

Level:intermediate
Location:src/dm/impls/plex/plexreorder.c
Index of all DMPLEX routines
Table of Contents for all manual pages
Index of all manual pages