C++ (Cpp) CheckMesh Examples

Example #1

int main(int argc, char **argv)
{
  AppCtx         user;                 /* user-defined work context */
  PetscErrorCode ierr;

  ierr = PetscInitialize(&argc, &argv, NULL,help);if (ierr) return ierr;
  ierr = ProcessOptions(PETSC_COMM_WORLD, &user);CHKERRQ(ierr);
  ierr = CreateMesh(PETSC_COMM_WORLD, user.testNum, &user, &user.dm);CHKERRQ(ierr);
  ierr = CheckMesh(user.dm, &user);CHKERRQ(ierr);
  ierr = DMDestroy(&user.dm);CHKERRQ(ierr);
  ierr = PetscFinalize();
  return ierr;
}

Example #2

PetscErrorCode CreateMesh(MPI_Comm comm, PetscInt testNum, AppCtx *user, DM *dm)
{
  PetscInt       dim          = user->dim;
  PetscBool      cellSimplex  = user->cellSimplex;
  PetscBool      useGenerator = user->useGenerator;
  const char    *filename     = user->filename;
  size_t         len;
  PetscMPIInt    rank;
  PetscErrorCode ierr;

  PetscFunctionBegin;
  ierr = MPI_Comm_rank(comm, &rank);CHKERRQ(ierr);
  ierr = PetscStrlen(filename, &len);CHKERRQ(ierr);
  if (len) {
    ierr = DMPlexCreateFromFile(comm, filename, PETSC_FALSE, dm);CHKERRQ(ierr);
    ierr = DMGetDimension(*dm, &dim);CHKERRQ(ierr);
  } else if (useGenerator) {
    if (cellSimplex) {
      ierr = DMPlexCreateBoxMesh(comm, dim, dim == 2 ? 2 : 1, PETSC_FALSE, dm);CHKERRQ(ierr);
    } else {
      const PetscInt cells[3] = {2, 2, 2};

      ierr = DMPlexCreateHexBoxMesh(comm, dim, cells, PETSC_FALSE, PETSC_FALSE, PETSC_FALSE, dm);CHKERRQ(ierr);
    }
  } else {
    ierr = DMCreate(comm, dm);CHKERRQ(ierr);
    ierr = DMSetType(*dm, DMPLEX);CHKERRQ(ierr);
    ierr = DMSetDimension(*dm, dim);CHKERRQ(ierr);
    switch (dim) {
    case 2:
      if (cellSimplex) {
        ierr = CreateSimplex_2D(comm, *dm);CHKERRQ(ierr);
      } else {
        ierr = CreateQuad_2D(comm, testNum, *dm);CHKERRQ(ierr);
      }
      break;
    case 3:
      if (cellSimplex) {
        ierr = CreateSimplex_3D(comm, *dm);CHKERRQ(ierr);
      } else {
        ierr = CreateHex_3D(comm, *dm);CHKERRQ(ierr);
      }
      break;
    default:
      SETERRQ1(comm, PETSC_ERR_ARG_OUTOFRANGE, "Cannot make meshes for dimension %d", dim);
    }
  }
  {
    DM interpolatedMesh = NULL;

    ierr = CheckMesh(*dm, user);CHKERRQ(ierr);
    ierr = DMPlexInterpolate(*dm, &interpolatedMesh);CHKERRQ(ierr);
    ierr = DMPlexCopyCoordinates(*dm, interpolatedMesh);CHKERRQ(ierr);
    ierr = CompareCones(*dm, interpolatedMesh);CHKERRQ(ierr);
    ierr = DMDestroy(dm);CHKERRQ(ierr);
    *dm  = interpolatedMesh;
  }
  {
    DM distributedMesh = NULL;

    /* Distribute mesh over processes */
    ierr = DMPlexDistribute(*dm, 0, NULL, &distributedMesh);CHKERRQ(ierr);
    if (distributedMesh) {
      ierr = DMViewFromOptions(distributedMesh, NULL, "-dm_view");CHKERRQ(ierr);
      ierr = DMDestroy(dm);CHKERRQ(ierr);
      *dm  = distributedMesh;
    }
  }
  ierr = PetscObjectSetName((PetscObject) *dm, "Interpolated Mesh");CHKERRQ(ierr);
  ierr = DMViewFromOptions(*dm, NULL, "-dm_view");CHKERRQ(ierr);
  user->dm = *dm;
  PetscFunctionReturn(0);
}

Example #3

File: ex7.c Project: feelpp/debian-petsc

PetscErrorCode CreateMesh(MPI_Comm comm, PetscInt testNum, AppCtx *user, DM *dm)
{
  PetscInt       dim          = user->dim;
  PetscBool      cellSimplex  = user->cellSimplex;
  PetscBool      useGenerator = user->useGenerator;
  const char    *filename     = user->filename;
  const char    *partitioner  = "chaco";
  size_t         len;
  PetscMPIInt    rank;
  PetscErrorCode ierr;

  PetscFunctionBegin;
  ierr = MPI_Comm_rank(comm, &rank);CHKERRQ(ierr);
  ierr = PetscStrlen(filename, &len);CHKERRQ(ierr);
  if (len) {
#if defined(PETSC_HAVE_EXODUSII)
    int   CPU_word_size = 0, IO_word_size = 0, exoid = -1;
    float version;

    if (!rank) {
      exoid = ex_open(filename, EX_READ, &CPU_word_size, &IO_word_size, &version);
      if (exoid <= 0) SETERRQ1(PETSC_COMM_SELF, PETSC_ERR_LIB, "ex_open(\"%s\",...) did not return a valid file ID", filename);
    }
    ierr = DMPlexCreateExodus(comm, exoid, PETSC_FALSE, dm);CHKERRQ(ierr);
    if (!rank) {ierr = ex_close(exoid);CHKERRQ(ierr);}
    ierr = DMPlexGetDimension(*dm, &dim);CHKERRQ(ierr);
#else
    SETERRQ(comm, PETSC_ERR_SUP, "Loading meshes requires ExodusII support. Reconfigure using --download-exodusii");
#endif
  } else if (useGenerator) {
    if (cellSimplex) {
      ierr = DMPlexCreateBoxMesh(comm, dim, PETSC_FALSE, dm);CHKERRQ(ierr);
    } else {
      ierr = DMPlexCreateHexBoxMesh(comm, dim, PETSC_FALSE, dm);CHKERRQ(ierr);
    }
  } else {
    ierr = DMCreate(comm, dm);CHKERRQ(ierr);
    ierr = DMSetType(*dm, DMPLEX);CHKERRQ(ierr);
    ierr = DMPlexSetDimension(*dm, dim);CHKERRQ(ierr);
    switch (dim) {
    case 2:
      if (cellSimplex) {
        ierr = CreateSimplex_2D(comm, *dm);CHKERRQ(ierr);
      } else {
        ierr = CreateQuad_2D(comm, testNum, *dm);CHKERRQ(ierr);
      }
      break;
    case 3:
      if (cellSimplex) {
        ierr = CreateSimplex_3D(comm, *dm);CHKERRQ(ierr);
      } else {
        ierr = CreateHex_3D(comm, *dm);CHKERRQ(ierr);
      }
      break;
    default:
      SETERRQ1(comm, PETSC_ERR_ARG_OUTOFRANGE, "Cannot make meshes for dimension %d", dim);
    }
  }
  {
    DM interpolatedMesh = NULL;

    ierr = CheckMesh(*dm);CHKERRQ(ierr);
    ierr = DMPlexInterpolate(*dm, &interpolatedMesh);CHKERRQ(ierr);
    ierr = DMPlexCopyCoordinates(*dm, interpolatedMesh);CHKERRQ(ierr);
    ierr = CompareCones(*dm, interpolatedMesh);CHKERRQ(ierr);
    ierr = DMDestroy(dm);CHKERRQ(ierr);
    *dm  = interpolatedMesh;
  }
  {
    DM distributedMesh = NULL;

    /* Distribute mesh over processes */
    ierr = DMPlexDistribute(*dm, partitioner, 0, &distributedMesh);CHKERRQ(ierr);
    if (distributedMesh) {
      ierr = DMDestroy(dm);CHKERRQ(ierr);
      *dm  = distributedMesh;
    }
  }
  ierr     = PetscObjectSetName((PetscObject) *dm, "Interpolated Mesh");CHKERRQ(ierr);
  ierr     = DMSetFromOptions(*dm);CHKERRQ(ierr);
  user->dm = *dm;
  PetscFunctionReturn(0);
}