dolfin team mailing list archive

[Anders Logg <logg@xxxxxxxxx>]

On Thu, Oct 01, 2009 at 04:50:20PM +0100, Garth N. Wells wrote:
> It would be useful if Coefficient had the eval member functions which
> are common to Expression and Function. Coefficient may no longer be the
> best name, but are there any objections?
>
> Here's an example of how I would like to use it: I have a Surface class
> which has a function for representing the surface. This can be a
> user-defined or a fe function (it cannot change from one to the other).
> I would like to store it as Coefficient with an eval interface like
>
> Coefficient::evaluate(double* values,
>                        const double* coordinates,
>                        const ufc::cell& cell) const;

Sure, but shouldn't the eval(double* values, const Data& data) suffice
for this? It would be good to avoid too many versions of eval.

--
Anders

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