petsc-3.12.4 2020-02-04
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# DMPlexCreateNeighborCSR

Create a mesh graph (cell-cell adjacency) in parallel CSR format.

### Synopsis

    #include "petscdmplex.h"
    PetscErrorCode DMPlexCreateNeighborCSR(DM dm, PetscInt cellHeight, PetscInt *numVertices, PetscInt **offsets, PetscInt **adjacency)

Collective

### Input Arguments

| dm | - The DMPlex
| cellHeight | - The height of mesh points to treat as cells (default should be 0)

### Output Arguments

| numVertices | - The number of local vertices in the graph, or cells in the mesh.
| offsets | - The offset to the adjacency list for each cell
| adjacency | - The adjacency list for all cells

Note: This is suitable for input to a mesh partitioner like ParMetis.

### See Also

DMPlexCreate()

### Level

advanced

### Location

src/dm/impls/plex/plexpartition.c

### Examples

src/ts/examples/tutorials/ex11.c.html
Index of all DMPLEX routines
Table of Contents for all manual pages
Index of all manual pages