petsc-3.6.1 2015-08-06
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DMCompositeGetGlobalISs

 Gets the index sets for each composed object

Synopsis

#include "petscdmcomposite.h"  
PetscErrorCode  DMCompositeGetGlobalISs(DM dm,IS *is[])
Collective on DMComposite

Input Parameter

dm -the packer object

Output Parameters

is -the array of index sets

Notes

The is entries should be destroyed with ISDestroy(), the is array 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.

See Also

DMDestroy(), DMCompositeAddDM(), DMCreateGlobalVector(),
DMCompositeGather(), DMCompositeCreate(), DMCompositeGetAccess(), DMCompositeScatter(), DMCompositeGetLocalVectors(), DMCompositeRestoreLocalVectors(),DMCompositeGetEntries()

Level:advanced
Location:src/dm/impls/composite/pack.c
Index of all DM routines
Table of Contents for all manual pages
Index of all manual pages

Examples

src/snes/examples/tutorials/ex28.c.html