DMSetFromOptions#

sets parameters in a DM from the options database

Synopsis#

#include "petscdm.h"          
#include "petscdmlabel.h"     
#include "petscds.h"     
PetscErrorCode DMSetFromOptions(DM dm)

Collective on dm

Input Parameter#

  • dm - the DM object to set options for

Options Database#

  • -dm_preallocate_only - Only preallocate the matrix for DMCreateMatrix() and DMCreateMassMatrix(), but do not fill it with zeros

  • -dm_vec_type - type of vector to create inside DM

  • -dm_mat_type - type of matrix to create inside DM

  • -dm_is_coloring_type -

  • -dm_bind_below - bind (force execution on CPU) for Vec and Mat objects with local size (number of vector entries or matrix rows) below n; currently only supported for DMDA

DMPLEX Specific creation options

  • -dm_plex_filename - File containing a mesh

  • -dm_plex_boundary_filename - File containing a mesh boundary

  • -dm_plex_name - Name of the mesh in the file

  • -dm_plex_shape - The domain shape, such as DM_SHAPE_BOX, DM_SHAPE_SPHERE, etc.

  • -dm_plex_cell - Cell shape

  • -dm_plex_reference_cell_domain - Use a reference cell domain

  • -dm_plex_dim - Set the topological dimension

  • -dm_plex_simplex - PETSC_TRUE for simplex elements, PETSC_FALSE for tensor elements

  • -dm_plex_interpolate - PETSC_TRUE turns on topological interpolation (creating edges and faces)

  • -dm_plex_scale - Scale factor for mesh coordinates

  • -dm_plex_box_faces <m,n,p> - Number of faces along each dimension

  • -dm_plex_box_lower <x,y,z> - Specify lower-left-bottom coordinates for the box

  • -dm_plex_box_upper <x,y,z> - Specify upper-right-top coordinates for the box

  • -dm_plex_box_bd <bx,by,bz> - Specify the DMBoundaryType for each direction

  • -dm_plex_sphere_radius - The sphere radius

  • -dm_plex_ball_radius - Radius of the ball

  • -dm_plex_cylinder_bd - Boundary type in the z direction

  • -dm_plex_cylinder_num_wedges - Number of wedges around the cylinder

  • -dm_plex_reorder - Reorder the mesh using the specified algorithm

  • -dm_refine_pre - The number of refinements before distribution

  • -dm_refine_uniform_pre - Flag for uniform refinement before distribution

  • -dm_refine_volume_limit_pre - The maximum cell volume after refinement before distribution

  • -dm_refine - The number of refinements after distribution

  • -dm_extrude - Activate extrusion and specify the number of layers to extrude

  • -dm_plex_transform_extrude_thickness - The total thickness of extruded layers

  • -dm_plex_transform_extrude_use_tensor - Use tensor cells when extruding

  • -dm_plex_transform_extrude_symmetric - Extrude layers symmetrically about the surface

  • -dm_plex_transform_extrude_normal <n0,…,nd> - Specify the extrusion direction

  • -dm_plex_transform_extrude_thicknesses <t0,…,tl> - Specify thickness of each layer

  • -dm_plex_create_fv_ghost_cells - Flag to create finite volume ghost cells on the boundary

  • -dm_plex_fv_ghost_cells_label - Label name for ghost cells boundary

  • -dm_distribute - Flag to redistribute a mesh among processes

  • -dm_distribute_overlap - The size of the overlap halo

  • -dm_plex_adj_cone - Set adjacency direction

  • -dm_plex_adj_closure - Set adjacency size

DMPLEX Specific Checks

  • -dm_plex_check_symmetry - Check that the adjacency information in the mesh is symmetric - DMPlexCheckSymmetry()

  • -dm_plex_check_skeleton - Check that each cell has the correct number of vertices (only for homogeneous simplex or tensor meshes) - DMPlexCheckSkeleton()

  • -dm_plex_check_faces - Check that the faces of each cell give a vertex order this is consistent with what we expect from the cell type - DMPlexCheckFaces()

  • -dm_plex_check_geometry - Check that cells have positive volume - DMPlexCheckGeometry()

  • -dm_plex_check_pointsf - Check some necessary conditions for PointSF - DMPlexCheckPointSF()

  • -dm_plex_check_interface_cones - Check points on inter-partition interfaces have conforming order of cone points - DMPlexCheckInterfaceCones()

  • -dm_plex_check_all - Perform all the checks above

See Also#

DMView(), DMCreateGlobalVector(), DMCreateInterpolation(), DMCreateColoring(), DMCreateMatrix(), DMPlexCheckSymmetry(), DMPlexCheckSkeleton(), DMPlexCheckFaces(), DMPlexCheckGeometry(), DMPlexCheckPointSF(), DMPlexCheckInterfaceCones(), DMSetOptionsPrefix(), DM, DMType, DMPLEX, DMDA

Level#

intermediate

Location#

src/dm/interface/dm.c

Examples#

src/dm/impls/plex/tutorials/ex10.c.html
src/dm/impls/plex/tutorials/ex11.c.html
src/dm/impls/plex/tutorials/ex14.c.html
src/dm/impls/plex/tutorials/ex1.c.html
src/dm/impls/plex/tutorials/ex1f90.F90.html
src/dm/impls/plex/tutorials/ex5.c.html
src/dm/impls/plex/tutorials/ex6.c.html
src/dm/impls/plex/tutorials/ex7.c.html
src/dm/impls/plex/tutorials/ex8.c.html
src/dm/impls/plex/tutorials/ex9.c.html
src/dm/impls/forest/tutorials/ex1.c.html

Implementations#

DMSetFromOptions_DA in src/dm/impls/da/dacreate.c
DMSetFromOptions_Forest in src/dm/impls/forest/forest.c
DMSetFromOptions_pforest in src/dm/impls/forest/p4est/pforest.h
DMSetFromOptions_Moab in src/dm/impls/moab/dmmoab.cxx
DMSetFromOptions_Network in src/dm/impls/network/networkcreate.c
DMSetFromOptions_Patch in src/dm/impls/patch/patchcreate.c
DMSetFromOptions_Plex in src/dm/impls/plex/plexcreate.c
DMSetFromOptions_Stag in src/dm/impls/stag/stag.c


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