DMCompositeGetGlobalISs#
Gets the index sets for each composed object in a DMCOMPOSITE
Synopsis#
#include "petscdmcomposite.h"
PetscErrorCode DMCompositeGetGlobalISs(DM dm, IS *is[])
Collective
Input Parameter#
dm - the
DMCOMPOSITEobject
Output Parameter#
is - the array of index sets
Notes#
The is entries should be destroyed with ISDestroy(), is should be freed with PetscFree()
These could be used to extract a subset of vector entries for a “multi-physics” preconditioner
Use DMCompositeGetLocalISs() for index sets in the packed local numbering, and
DMCompositeGetISLocalToGlobalMappings() for to map local sub-DM (including ghost) indices to packed global
indices.
Fortran Notes#
The output argument ‘is’ must be an allocated array of sufficient length, which can be learned using DMCompositeGetNumberDM().
See Also#
DMCOMPOSITE, DM, DMDestroy(), DMCompositeAddDM(), DMCreateGlobalVector(),
DMCompositeGather(), DMCompositeCreate(), DMCompositeGetAccess(), DMCompositeScatter(),
DMCompositeGetLocalVectors(), DMCompositeRestoreLocalVectors(), DMCompositeGetEntries()
Level#
advanced
Location#
Examples#
src/snes/tutorials/ex28.c
src/snes/tutorials/ex73f90t.F90
Index of all DM routines
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Index of all manual pages