On Thu, Aug 19, 2010 at 10:40 AM, Vikram Garg
<[email protected]> wrote:
> Andrew,
>            The point_value and point_gradient functions should do the job.
> See below for an example of their use. See system.C for the function
> implementation. These functions currently do not support vectors of points
> but that should be added. Note that the arguments to the
> point_value/gradient function are the variable number and Point object.
>
> x = number;
> y = number;
>
> Point p(x, y);
>
> Number u_p = point_value(0, p);
> Gradient grad_u_p = point_gradient(0, p);

To be clear, this is a feature of the FEMContext object, itself a part
of the FEMSystem family of classes.  An example of FEMSystem use is
ex18, "plain vanilla" libmesh doesn't have these functions.

-- 
John

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