PETSc version 3.16.5
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# DMPlexGetSubpointIS

Returns an IS covering the entire subdm chart with the original points as data

### Synopsis

    #include "petscdmplex.h"
    #include "petscdmlabel.h"
    PetscErrorCode DMPlexGetSubpointIS(DM dm, IS *subpointIS)

### Input Parameter

| dm | - The submesh DM

### Output Parameter

| subpointIS | - The IS of all the points from the original mesh in this submesh, or NULL if this is not a submesh

Note: This IS is guaranteed to be sorted by the construction of the submesh

### See Also

DMPlexCreateSubmesh(), DMPlexGetSubpointMap()

### Level

developer

### Location

src/dm/impls/plex/plexsubmesh.c
Index of all DMPLEX routines
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Index of all manual pages