Apologies if this is very obvious, but I have been looking everywhere and cannot find an answer!
I have a ufl.algebra.Product object and I would like access it’s data. From the documentation (ufl package — Unified Form Language (UFL) 2021.1.0 documentation) it seems like I can do
object.evaluate(x, mapping, component, index_values)
which looks ideal.
My question is: what are ‘x’, ‘mapping’, ‘component’ and ‘index_values’? I’m guessing that ‘x’ is a ufl.SpatialCoordinate() of some kind, but I have no idea what ‘mapping’ is. There doesn’t seem to be a definition anywhere.
Thank you in advance,