PeriodicBoundaryComputation_masters_slaves

dolfin.cpp.mesh.PeriodicBoundaryComputation_masters_slaves(mesh, sub_domain, dim)

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.