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

Input Parameter#

dm - the DM object to set options for

Options Database Keys#

-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
-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 BOX, 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
-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