DMPlexCreateFromFile

This takes a filename and produces a DM

Synopsis

#include "petscdmplex.h"   
#include "petscdmplex.h"   
PetscErrorCode DMPlexCreateFromFile(MPI_Comm comm, const char filename[], const char plexname[], PetscBool interpolate, DM *dm)

Collective

Input Parameters

• comm - The communicator

• filename - A file name

• plexname - The object name of the resulting DM, also used for intra-datafile lookup by some formats

• interpolate - Flag to create intermediate mesh pieces (edges, faces)

Output Parameter

• dm - The DM

Options Database Key

• -dm_plex_create_from_hdf5_xdmf - use the PETSC_VIEWER_HDF5_XDMF format for reading HDF5

Use -dm_plex_create_ prefix to pass options to the internal PetscViewer, e.g.

-dm_plex_create_viewer_hdf5_collective

Notes

Using PETSCVIEWERHDF5 type with PETSC_VIEWER_HDF5_PETSC format, one can save multiple DMPLEX meshes in a single HDF5 file. This in turn requires one to name the DMPLEX object with PetscObjectSetName() before saving it with DMView() and before loading it with DMLoad() for identification of the mesh object. The input parameter name is thus used to name the DMPLEX object when DMPlexCreateFromFile() internally calls DMLoad(). Currently, name is ignored for other viewer types and/or formats.

See Also

DMPlex: Unstructured Grids, DM, DMPLEX, DMPlexCreateFromDAG(), DMPlexCreateFromCellListPetsc(), DMPlexCreate(), PetscObjectSetName(), DMView(), DMLoad()

Level

beginner

Location

src/dm/impls/plex/plexcreate.c

Examples

src/dm/label/tutorials/ex1.c
src/ts/tutorials/ex48.c
src/dm/impls/plex/tutorials/ex5.c

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Index of all DMPlex routines
Table of Contents for all manual pages
Index of all manual pages