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.