Very cool David... since you brought these up a little while back we've
been thinking of ways we can use them. I think they're going to turn out
to be quite useful for a lot of different things (like well behaved,
non-constant, discontinuous material property projections)...
Thanks for contributing this!
Derek
On Mon, Feb 27, 2012 at 7:34 PM, David Knezevic
<dkneze...@seas.harvard.edu>wrote:
> I've just checked in the discontinuous Lagrange basis (L2_LAGRANGE) we
> discussed recently. Changing MONOMIAL to L2_LAGRANGE in
> miscellaneous_ex5 works fine in both 2D and 3D.
>
> A few comments:
>
> 1. Just like in fe_monomial.C, I set compute_constraints to be a NOOP. I
> was surprised to see that this method is not a NOOP in L2_HIERARCHIC?
>
> 2. Similarly, I was surprised to see that L2_HIERARCHIC returns C_ZERO
> rather than DISCONTINUOUS in get_continuity()?
>
> 3. In fe_monomial.C, it looks like monomial_n_dofs() and
> monomial_n_dofs_per_elem() are identical? If so, I'd like to delete the
> latter (we only have one of these two functions in L2_HIERARCHIC and
> L2_LAGRANGE)
>
> 4. For now I've just used the same "max_order" for L2_LAGRANGE and
> LAGRANGE, since I wanted to do an initial check-in based directly on
> LAGRANGE. But L2_LAGRANGE's Order is no longer related to "element
> order" (e.g. a SECOND on a TRI3 is perfectly fine for L2_LAGRANGE), so
> those extra valid combinations could be added to L2_LAGRANGE... this
> would also have implications for the serendipity shapes functions: we
> currently assume that QUAD8 or HEX20 implies serendipity, but this need
> not be true with L2_LAGRANGE.
>
> 5. I followed the L2_HIERARCHIC approach of adding new files
> fe_l2_lagrange_shape_*D.C which are copies of fe_lagrange_shape_*D.C
> with LAGRANGE replaced by L2_LAGRANGE. But it would be possible to just
> call LAGRANGE's shape functions directly, rather than copying and
> pasting --- though this would need some modifications if point 4 above
> is implemented. Any thoughts on the best thing to do here?
>
> Dave
>
>
>
> ------------------------------------------------------------------------------
> Keep Your Developer Skills Current with LearnDevNow!
> The most comprehensive online learning library for Microsoft developers
> is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3,
> Metro Style Apps, more. Free future releases when you subscribe now!
> http://p.sf.net/sfu/learndevnow-d2d
> _______________________________________________
> Libmesh-devel mailing list
> Libmesh-devel@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/libmesh-devel
>
------------------------------------------------------------------------------
Keep Your Developer Skills Current with LearnDevNow!
The most comprehensive online learning library for Microsoft developers
is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3,
Metro Style Apps, more. Free future releases when you subscribe now!
http://p.sf.net/sfu/learndevnow-d2d
_______________________________________________
Libmesh-devel mailing list
Libmesh-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/libmesh-devel
