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[Anders Logg <logg@xxxxxxxxx>]

How is this mapping created? Which degree is chosen for the elements?
If it's the same as currently used in FFC, we can drop that and rely
on UFL.

Here's what's used in FFC:

  # Extract common degree
  common_degree = max([e.degree() for e in elements])
  if common_degree is None:
      common_degree = default_quadrature_degree

  # Degree must be at least 1 (to work with Lagrange elements)
  common_degree = max(1, common_degree)

--
Anders

--- Begin Message ---

• To: logg@xxxxxxxxx
• From: Martin Sandve Alnæs <785143@xxxxxxxxxxxxxxxxxx>
• Date: Mon, 30 May 2011 11:35:32 -0000
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• Reply-to: Bug 785143 <785143@xxxxxxxxxxxxxxxxxx>
• Sender: bounces@xxxxxxxxxxxxx

In an upcoming commit, the element mapping is now constructed
automatically by ufl in preprocess in the case of invalid cells. Thus
ffc (and sfc) do not need to pass a mapping unless you want to override
things like degree and family.

Note that there may still be issues with the above code snippet, but
I'll close this bug and report eventual other bugs separately if
necessary.

** Changed in: ffc
       Status: Confirmed => Invalid

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https://bugs.launchpad.net/bugs/785143

Title:
  Element mapping is not provided to ufl.Form.compute_form_data()

Status in FEniCS Form Compiler:
  Invalid

Bug description:
  FFC does not provide an element mapping to
  ufl.Form.compute_form_data(). This is needed when used from PyDOLFIN,
  to make forms well defined when coefficients are missing cells.

  I have some failing code, will need to simplify it before I post it
  here.

--- End Message ---