fenics team mailing list archive

["Marie E. Rognes" <meg@xxxxxxxxx>]

On 03/04/2013 05:26 PM, Anders Logg wrote:
> The ufc-geometry branches of UFC, FFC and DOLFIN have been merged into
> trunk. In addition, the FFC branch merges in Martin's addition of the
> new uflacs compiler backend to FFC. (Martin can comment on the status
> of the uflacs backend.)
>
> The changes in ufc-geometry were motivated by a cleanup of the
> codesnippets in FFC and a simplification (?) of the UFC interface.
> Some changes:
>
> - Introduce header ufc_geometry.h in UFC to replace codesnippets.
>    Quite a few codesnippets remain and should be migrated to the same
>    header file.
>
> - Use flattened arrays for all data structures. See comment on top of
>    ufc_geometry.h for some remarks on the efficiency vs nested arrays
>    and flattened/nested std::vector.
>
> - Remove ufc::cell as a common data structure holding a bunch of data
>    that may not be needed and therefore should not need to be updated.
>    Instead, all data should be passed by primitive C data types.


Very nice!

> Some of these are work in progress and more work needs to be
> done. Before this, I'm going to merge UFC into FFC (if there are no
> objections) to simplify the continued work as it involves changes on
> both ends.

Since we have added/changed quite a bit of functionality since 1.1 (PDEs 
on surface,
changes in the meaning of dx for instance); would it be an idea to make 
a release before starting to merge projects?

--
Marie


> All tests in FFC and DOLFIN pass, but since quite a few things needed
> to be changed (including some tedious and error-prone translation of
> nested arrays for Jacobians and such into flattened arrays) there may
> be bugs so watch out...
>
> --
> Anders
>
>
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