On 01/28/2013 10:35 PM, Anders Logg wrote: > On Mon, Jan 28, 2013 at 09:31:27PM +0000, Garth N. Wells wrote: >> On 28 January 2013 21:22, Anders Logg <[email protected]> wrote: >>> On Mon, Jan 28, 2013 at 10:10:40PM +0100, Johan Hake wrote: >>>> Hello! >>>> >>>> I have now added a method to DofMap, which tabulate a map between >>>> vertices and dofs. It will only work for DofMaps with dofs on vertices. >>>> So basically for any CG 1 FunctionSpaces and will raise error else wise. >>>> >>>> Usage: >>>> >>>> from dolfin import * >>>> import numpy as np >>>> mesh = UnitSquareMesh(10,10) >>>> V = VectorFunctionSpace(mesh, "CG", 1) >>>> u = Function(V) >>>> u.interpolate(Constant((1,2))) >>>> vert_values = np.zeros(mesh.num_vertices()*2) >>>> vert_values[V.dofmap().tabulate_vertex_map(mesh)] = \ >>>> u.vector().array() >>>> print vert_values >>>> >>>> In parallel the map will follow the local dofs. This means that some >>>> values in vert_values above will still be 0. The 0 values will then >>>> correspond to vertex values which are owned by another process. >>>> >>>> In C++ the method returns a std::vector<std::size_t>. >>>> >>>> Questions: >>>> Does the name "tabulate_vertex_map" work? >>> >>> Sounds ok. >>> >> >> Doesn't mean much to me. Can it be more descriptive? >> >>>> Should a version of this method exist in other classes. FunctionSpace, >>>> Function (without the mesh argument of course)? >>> >>> Yes, would be good to have for convenience. >>> >> >> I don't see the benefit of spreading it around. It should just belong to >> DofMap. > > A method in Function should do more than just provide the map.
Like what? Set values from vertex_ordered values? I am not convinced of that... Johan _______________________________________________ Mailing list: https://launchpad.net/~dolfin Post to : [email protected] Unsubscribe : https://launchpad.net/~dolfin More help : https://help.launchpad.net/ListHelp
