1 #define PETSCDM_DLL 2 #include <petsc/private/dmpleximpl.h> /*I "petscdmplex.h" I*/ 3 4 /*@ 5 DMPlexCreateExodusFromFile - Create a `DMPLEX` mesh from an ExodusII file. 6 7 Collective 8 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 13 14 Output Parameter: 15 . dm - The `DM` object representing the mesh 16 17 Level: beginner 18 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; 28 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 } 42