[Gmsh] two bugs

[Christophe Geuzaine]

John Doe wrote:
> Hi Christophe,
> 
> Thanks for your response.  I am rebuilding the stable source with
> Tetgen right now.
> 
> Just for my understanding, both Netgen and Tetgen produce a Delaunay
> tetrahedralization?  In my finite volume code, do I need to look out
> for elements where the Delaunay condition is not met?
> 

You'll probably mostly want to avoid bad quality elements. Always apply 
Optimize and/or Optimize (Netgen) in that case.

> Thanks,
> 
> Juan
> 
> On Fri, Oct 3, 2008 at 1:19 AM, Christophe Geuzaine <cgeuzaine at ulg.ac.be> wrote:
>> John Doe wrote:
>>> According to the web page, bugs should be filed on the mailing list.
>>> I have two.
>>>
>>> Bug #1:
>>> If I create a 3d box with corners 1e-5 apart with 5e-7 characteristic
>>> length at each corner, the program crashes.  If I do the same with 1
>>> and 0.05.  This is with the stable source code version
>>>
>> Hi John - it's a known problem with the 3D Netgen algorithm. Using
>> Tetgen+Delaunay should solve this.
>>
>> (Try first with a binary from the website. To build from sources, you need
>> to download tetgen from the web and copy the .cxx and .h files into
>> gmsh/contrib/Tetgen/.)
>>
>>> Bug #2:
>>> Compilation of the stable source code fails if GL/gl.h is missing.
>>> The configure script misses this on linux.
>>>
>> We rely on fltk's "fltk-config" script to detect OpenGL on Linux. We should
>> maybe include additional tests...
>>
>>
>>
>>> Thanks,
>>>
>>> Juan
>>>
>>> _______________________________________________
>>> gmsh mailing list
>>> gmsh at geuz.org
>>> http://www.geuz.org/mailman/listinfo/gmsh
>>>
>>>
>>
>> --
>> Prof. Christophe Geuzaine
>> University of Liege, Electrical Engineering and Computer Science
>> http://www.montefiore.ulg.ac.be/~geuzaine
>>
> 
> 


-- 
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science
http://www.montefiore.ulg.ac.be/~geuzaine