Re: [Libmesh-devel] Libmesh-devel Digest, Vol 40, Issue 4

[John P. <pet...@cf...>]

On Sat, Oct 17, 2009 at 8:42 PM, Paulo Vieira <pau...@gm...> wrote:
> Hello!
>
> I suggest that the next version should have an updated version of the
> Triangle mesh generator. Currently libmesh has version 1.5, but the
> latest version is v1.6 (four years old!). See
> http://www.cs.cmu.edu/~quake/triangle.html
>
> This update brings substantial improvements to the Triangle library,
> especially in domains with sharp angles, as stated in the webpage. My
> version of libmesh has v1.6 for some time and I never had any problem.
> The API is the same. You simply have to replace the files triangle.c e
> triangle.h in the contrib directory. The only changes needed are in
> triangle.h, in the last lines (282 to 289): comment the #ifdef's
> there, and replace "VOID" with "int" in the declaration of "trifree"
> (this is just to outsmart some compilers, see triangle.c, line 311).
> So it should be just like this:
>
> void triangulate(char *, struct triangulateio *, struct triangulateio *,
>                 struct triangulateio *);
> void trifree(int *memptr);

Thank you for the detailed instructions.  I will get the latest
Triangle version checked in ASAP.

> I also have my own upgrade to the TriangleInterface library, which
> takes care of stuff like boundary ids and subdomains (and where you
> can have triangles with different maximum area, for example). I'm
> using it for shape optimization problems. I'll write a post about this
> sometime later...

Great, I would like to take a look at this code.  It has been on my
"Todo someday" list forever.

Thanks,
-- 
John