GenericDofMap¶
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class
dolfin.cpp.fem.
GenericDofMap
(*args, **kwargs)¶ Bases:
dolfin.cpp.common.Variable
This class provides a generic interface for dof maps
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block_size
¶
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cell_dimension
()¶ Return the dimension of the local finite element function space on a cell
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cell_dofs
()¶ Local-to-global mapping of dofs on a cell
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collapse
()¶ Create a “collapsed” a dofmap (collapses from a sub-dofmap view)
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constrained_domain
¶
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copy
()¶ Create a copy of the dof map
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create
()¶ Create a new dof map on new mesh
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dofs
()¶ Return list of global dof indices on this process
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extract_sub_dofmap
()¶ Extract sub dofmap component
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geometric_dimension
()¶
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global_dimension
()¶ Return the dimension of the global finite element function space
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is_view
()¶ True if dof map is a view into another map (is a sub-dofmap)
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max_cell_dimension
()¶ Return the maximum dimension of the local finite element function space
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neighbours
()¶ Return set of processes that share dofs with the this process
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num_entity_dofs
()¶ Return the number of dofs for a given entity dimension
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num_facet_dofs
()¶ Return number of facet dofs
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off_process_owner
()¶ Return map from nonlocal-dofs (that appear in local dof map) to owning process
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ownership_range
()¶ Return the ownership range (dofs in this range are owned by this process)
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restriction
()¶ Restriction if any. If the dofmap is not restricted, a null pointer is returned.
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set
()¶ Set dof entries in vector to a specified value. Parallel layout of vector must be consistent with dof map range. This function is typically used to construct the null space of a matrix operator
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set_x
()¶ Set dof entries in vector to the value*x[i], where x[i] is the spatial coordinate of the dof. Parallel layout of vector must be consistent with dof map range. This function is typically used to construct the null space of a matrix operator, e.g. rigid body rotations.
Return map from shared dofs to the processes (not including the current process) that share it.
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tabulate_all_coordinates
()¶ Tabulate the coordinates of all dofs owned by this process. This function is typically used by preconditioners that require the spatial coordinates of dofs, for example for re-partitioning or nullspace computations. The format for the return vector is [x0, y0, z0, x1, y1, z1, . . .].
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tabulate_coordinates
(cell, coordinates=None)¶ Tabulate the coordinates of all dofs on a cell
- Arguments
- cell (_Cell_)
- The cell.
- coordinates (NumPy array)
- Optional argument: The coordinates of all dofs on a cell.
- Returns
- coordinates
- The coordinates of all dofs on a cell.
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tabulate_entity_dofs
()¶ Tabulate the local-to-local mapping of dofs on entity (dim, local_entity)
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tabulate_facet_dofs
()¶ Tabulate local-local facet dofs
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thisown
¶ The membership flag
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