[Gmsh] integrate bugs
Christophe Geuzaine
cgeuzaine at ulg.ac.be
Wed Jan 30 09:43:03 CET 2008
Lars Rindorf wrote:
> I solved the first 'bug'. I accidently integrated also over the boundaries as well as the open domain. The second bug still holds.
>
I cannot reproduce this. Could you send the file?
> KR Lars
>
> ________________________________
>
> From: Lars Rindorf
> Sent: Tue 1/22/2008 10:02 AM
> To: gmsh at geuz.org
> Subject: integrate bugs
>
>
> Dear Christophe
>
> I found a couple of errors (I think) in the integrate plugin to gmesh. My OS is XP.
>
> If I integrate '1' over a 1x1 square th plugin returns '3', if the square is 2x2 it returns '8'. It seems to follow a formula L^2 + 2*L, where L is the length of the side of the square. I also tried to integrate x^2 over 1x1 and it returned 1/4 instead of 1/12, wring by the factor of '3'.
>
> There is a second error in the plugin 'Integrate'. Plot two scalars, first a and then b, integrate b and gmesh integrates a (the first), no matter if a or b is chosen in the view of the plugin.
>
> Kind regards
>
> Lars Rindorf
>
>
>
>
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--
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science
http://www.montefiore.ulg.ac.be/~geuzaine