Hi deal.ii community,

I have a little implementation problem to bug you with... 

Is there a way to evaluate a given shape function on a given cell like a 
normal Function or TensorFunction? I need to do many computations on a 
coarse cell that itself is meshed.

I have an implementation but it is not very efficient: I create an FEValues 
object and first map the evaluation points back to the unit cell using an 
appropriate mapping. These I use as "quadrature points" and get the values 
on the real (coarse) cell by then reinitializing the FEValues object with 
it. Works for all shape functions but is slow and cumbersome.

I actually only need it for Q1 elements and lowest order Nedelec and 
Raviart-Thomas elements.

Anyone has an idea?

Cheers,
Konrad

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