Extract GlobalPosition from Grid
There are many places where the global position type is locally defined as:
using GlobalPosition = Dune::FieldVector<Scalar, dimWorld>;
We maybe should think about extracting it from the Element (i.e. Element::Geometry::GlobalCoordinate) or from the sub-control volumes and sub-control volume faces (which itself should have been given the type extracted from the grid).
This is especially important when Scalar and ctype are not the same.
Edited by Dennis Gläser