[Dune] unitOuterNormal()

[Atgeirr Flø Rasmussen]

Carsten Gräser skreiv:
> Dear all,
> as decided on the dune meeting yesterday we will introduce a method
> on intersections returning the unit outer normal at the 'center'.
> This must not be the exact centroid but should coincide with
> the result of the new center() method on geometries. The proposed
> name was 'unitOuterNormal()' without arguments.
>
> There was one concern that this might be misunderstood (e.g. by students)
> to return 'the normal' which does not exist in general. I suggest
> to change the name to centerUnitOuterNormal() to prevent this issue.
> Furthermore it describes exactly what the method is supposed to do.
>
> Regards
> Carsten
>
>   
This is fine with me.

Atgeirr