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Re: [Question #97807]: How to Obtain the Coordinates of the Vertices of a Mesh with P2 and Higher Elements

To: dolfin@xxxxxxxxxxxxxxxxxxx
From: Garth Wells <question97807@xxxxxxxxxxxxxxxxxxxxx>
Date: Fri, 29 Jan 2010 19:21:03 -0000
Reply-to: question97807@xxxxxxxxxxxxxxxxxxxxx
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Question #97807 on DOLFIN changed:
https://answers.launchpad.net/dolfin/+question/97807

Garth Wells posted a new comment:
I've just added a new function to DofMap:

    /// Return the set of dof indices
    Set<dolfin::uint> list(const Mesh& mesh, bool sort = false) const;

It can be particularly useful for mixed elements, since a for 'shallow'
sub-function it  will give the entries in the 'big' function vector
associated with a particular field, e.g.

    boost::shared_ptr<FunctionSpace> V_sub = V[1];
    Set<dolfin::uint> sub_dof_list = V_sub->dofmap().list(mesh, true);
    for (dolfin::uint i = 0; i < sub_dof_list.size(); ++i )
        cout << "i: " << i << "  " << sub_dof_list[i] << endl;

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