Date: 2025-03-28T21:10:45+00:00

Actual source code: plexexodusii.c

      1: #define PETSCDM_DLL
      2: #include <petsc/private/dmpleximpl.h>

      4: /*@
      5:   DMPlexCreateExodusFromFile - Create a `DMPLEX` mesh from an ExodusII file.

      7:   Collective

      9:   Input Parameters:
     10: + comm        - The MPI communicator
     11: . filename    - The name of the ExodusII file
     12: - interpolate - Create faces and edges in the mesh

     14:   Output Parameter:
     15: . dm - The `DM` object representing the mesh

     17:   Level: beginner

     19: .seealso: [](ch_unstructured), `DM`, `PETSCVIEWEREXODUSII`, `DMPLEX`, `DMCreate()`, `DMPlexCreateExodus()`
     20: @*/
     21: PetscErrorCode DMPlexCreateExodusFromFile(MPI_Comm comm, const char filename[], PetscBool interpolate, DM *dm)
     22: {
     23:   PetscFunctionBegin;
     24: #if defined(PETSC_HAVE_EXODUSII)
     25:   PetscMPIInt      rank;
     26:   PetscExodusIIInt CPU_word_size = sizeof(PetscReal), IO_word_size = 0, exoid = -1;
     27:   float            version;

     29:   PetscAssertPointer(filename, 2);
     30:   PetscCallMPI(MPI_Comm_rank(comm, &rank));
     31:   if (rank == 0) {
     32:     exoid = ex_open(filename, EX_READ, &CPU_word_size, &IO_word_size, &version);
     33:     PetscCheck(exoid > 0, PETSC_COMM_SELF, PETSC_ERR_LIB, "ex_open(\"%s\",...) did not return a valid file ID", filename);
     34:   }
     35:   PetscCall(DMPlexCreateExodus(comm, exoid, interpolate, dm));
     36:   if (rank == 0) PetscCallExternal(ex_close, exoid);
     37:   PetscFunctionReturn(PETSC_SUCCESS);
     38: #else
     39:   SETERRQ(comm, PETSC_ERR_SUP, "Loading meshes requires EXODUSII support. Reconfigure using --with-exodusii-dir or -download-exodusii");
     40: #endif
     41: }