Renumber simplex reference cells - #1028

This has to be introduced very carefully, as this will break all IO permutations we have made in DOLFINx and any other IO library.

This has to be introduced very carefully, as this will break all IO permutations we have made in DOLFINx and any other IO library.

Furthermore, this will break any checkpoint made by adios4dolfinx or io4dolfinx made prior to this merge, as this will affect the element dof layout and I guess the cell permutations and facet permutation will differ?

This has to be introduced very carefully, as this will break all IO permutations we have made in DOLFINx and any other IO library.

Yes, hence "draft" for now

This has to be introduced very carefully, as this will break all IO permutations we have made in DOLFINx and any other IO library.

Furthermore, this will break any checkpoint made by adios4dolfinx or io4dolfinx made prior to this merge, as this will affect the element dof layout and I guess the cell permutations and facet permutation will differ?

Checkpoints should record version numbers, if they're not already.

I think we should go for this before a release is made in the coming weeks.

I think we should go for this before a release is made in the coming weeks.

I'll sort out the updates needed in DOLFINx and FFCx this week so it can be ready