This zoo of shapes deal isn't at all what DOLFIN does. Given the present setup of UFC/DOLFIN you're stuck with simplices because of the isomorphism between hypergraphs and simplicial complices, and the easily implied orientations of both (which is why the UFC cell is elegant and extends to higher dimensions, but doesn't work beyond simplices) I've been thinking of how to take this style of mesh representation to different geometries (specifically any tensor product simplices) and it's not that difficult but is probably best implemented as a combination between the cell-chain (sieve) and implicit ordering approach to make it efficient.
- Peter
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