dolfin team mailing list archive

["Garth N. Wells" <gnw20@xxxxxxxxx>]

On Tue, Nov 20, 2012 at 11:24 AM, Johan Hake <hake.dev@xxxxxxxxx> wrote:
> On 11/15/2012 10:07 AM, Garth N. Wells wrote:
>> On Thu, Nov 15, 2012 at 8:58 AM, Johan Hake <hake.dev@xxxxxxxxx> wrote:
>>> On 11/14/2012 09:51 AM, Benjamin Kehlet wrote:
>>>> 2012/11/14 Anders Logg <logg@xxxxxxxxx <mailto:logg@xxxxxxxxx>>
>>>>
>>>>     Dear all,
>>>>
>>>>     The plot and csg branches have been merged into trunk. Please try out
>>>>     the new functionality for mesh generation (from both CSG descriptions
>>>>     and input files) and plotting and report any problems.
>>>>
>>>>     All thanks to very good work from Benjamin, Joachim and Johannes.
>>>>
>>>>
>>>> It is a little bit early to applaud. There are some issues with the csg
>>>> stuff that need to be fixed, so mesh generation (in particular in 3D) is
>>>> likely to crash.  I've have pushed everything to trunk, though, since
>>>> some of the plotting code depends on parts of the csg code.
>>>
>>> It crashes, but almost randomly. The same script (3D demo) sometime
>>> generate a nice mesh, other times a crappy one, and sometimes just crash.
>>>
>>>> Will report back when this has been fixed.
>>>
>>> What is the main cause for this erratic behavior?
>>>
>>
>> I observed erratic behaviour with CGAL <= 4.0.2 + gcc before the CSG
>> merge (this also showed up with the buildbots, with the CGAL-based
>> mesh generation failing randomly), but it's been very reliable with
>> CGAL 4.2 + gcc 4.7.
>
> I guess you mean CGAL 4.1?
>

Yes.

> I have now upgraded to CGAL 4.1 and gcc4.7 and it is actually less
> reliable. Now I have not got any mesh out of the 3D python demo.
> Previously I got some 1 out of 4 runs.
>

Flaky for me too now with repeated testing. On one run it worked, but
the result was very strange.

Garth

> Johan
>
>> Garth
>>
>>> Johan
>>>
>>>> Benjamin
>>>>
>>>>
>>>>     --
>>>>     Anders
>>>>
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>