PeriodicBoundaryComputation

class dolfin.cpp.mesh.PeriodicBoundaryComputation

Bases: object

This class computes map from slave entity to master entity

static compute_periodic_pairs(mesh: 'Mesh', sub_domain: 'SubDomain', dim: 'std::size_t const') → 'std::map< unsigned int,std::pair< unsigned int,unsigned int > >'

For entities of dimension dim, compute map from a slave entity on this process (local index) to its master entity (owning process, local index on owner). If a master entity is shared by processes, only one of the owning processes is returned.

static masters_slaves(mesh: 'std::shared_ptr< dolfin::Mesh const >', sub_domain: 'SubDomain', dim: 'std::size_t const') → 'dolfin::MeshFunction< std::size_t >'

This function returns a MeshFunction which marks mesh entities of dimension dim according to:

2: slave entities 1: master entities 0: all other entities

It is useful for visualising and debugging the Expression::map function that is used to apply periodic boundary conditions.

thisown

The membership flag