On Fri, Apr 17, 2009 at 03:57:09PM +0800, Garth N. Wells wrote: > > > Anders Logg wrote: > > On Fri, Apr 17, 2009 at 03:07:17PM +0800, Garth N. Wells wrote: > >> > >> Anders Logg wrote: > >>> On Fri, Apr 17, 2009 at 08:59:43AM +0200, Johan Hake wrote: > >>>> On Friday 17 April 2009 03:32:26 Garth N. Wells wrote: > >>>>> Should we start moving to UFL-based forms for the DOLFIN demos? Is the > >>>>> only serious outstanding issue on the FFC side the correct determination > >>>>> of the quadrature order? > >>>> Not sure how this could be best done in PyDOLFIN. > >>>> > >>>> We could add > >>>> > >>>> from dolfin.ufl import * > >>>> > >>>> after each > >>>> > >>>> from dolfin import * > >>>> > >>>> in the demos. When this is done and it all just works(TM) we can move > >>>> the > >>>> files in the site-packages/dolfin/ufl directory down to > >>>> site-packages/dolfin, > >>>> and remove > >>>> > >>>> from dolfin.ufl import * > >>>> > >>>> from the demos? > >>>> > >>>> Johan > >>> I suggest we just move everything to UFL at once and then solve any > >>> problems that we encounter. > >>> > >>> I'm intending to remove the .form support from FFC quite soon (maybe > >>> today). > >>> > >>> It's easier to fix things so that they work with UFL than to have two > >>> conflicting form languages work at the same time. > >>> > >> The quadrature issue is serious, so I think that it should be tackled > >> before the transition, or at least a short-term plan for how to solve it > >> should be in place. > >> > >> Garth > > > > Is it so serious? It's a small thing compared to what will happen when > > the .form support is removed from FFC (as in everything will be broken > > until fixed). > > > > Results computed with the new and old formats will not, in general, be > the same, so I considered it to be serious.
Yes, they won't be the same but I thought they would still be correct (as in possibly using a better quadrature rule than needed). Kristian? -- Anders > > What is the problem with the quadrature order. Is it > > extract_quadrature_order and estimate_quadrature_order not working > > properly in UFL? What is the difference between the two? > > > > My most recent understanding is that these are not working as they should. > > Garth > > _______________________________________________ > FFC-dev mailing list > [email protected] > http://www.fenics.org/mailman/listinfo/ffc-dev
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