dolfin team mailing list archive

[kent-and@xxxxxxxxx]

There are at least two ways to do this.

1) Create a submesh. Anders has implemented support for
    submeshes but I don't know if it works on meshes that
    have lower dim than the original. Anders has to tell you how
    to proceed.


2) Change DofMap. As it is now DofMap checks if it has a precomputed
    dof_map (array of integers). If it has this array it will not compute
    it. Hence you need to create such an array. The array should contains
    -1 for the values that should not be used. You create this array by
running
    over the part of the mesh that you want to use.

    I suggest you start experimenting by adding a function to FunctionSpace
    which again calls DofMap.  This function needs as input the structure
that
    you want to use to specify the subdomain.

OK?

Kent


> I had asked a question a while back about having a finite element function
> that was ONLY defined on the boundary.  If I wanted to put this in, what
> parts of the code should I look at?  Or is it too complicated?
>
> - Shawn
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