[Gmsh] igs to geo
Fabian
f.braennstroem at gmx.de
Sun Aug 3 16:09:56 CEST 2008
Christophe Geuzaine wrote:
> Fabian Braennstroem wrote:
>
>> Hi Christophe,
>>
>> * On 20 Jul 2008 * Christophe Geuzaine wrote:
>>
>>
>>> Fabian Braennstroem wrote:
>>>
>>>> Hi,
>>>>
>>>> I have a small problem, when importing an igs (exported by
>>>> ICEM) geometry. Actually the import works well,
>>>> but as soon as I save it as a geo file, I get a lot more
>>>> points then in the igs file. I attach to snapshots. Do I
>>>> do anything wrong?
>>>>
>>> Not really: the geo export is pretty much there for debugging purposes
>>> only. The reason you get more points is probably that the straight lines
>>> in the iges files are represented e.g. by splines instead of line
>>> segments.
>>>
>>> Our goal is to mesh iges/step files directly, without converting them
>>> into geo format first...
>>>
>> Did not know that; sounds nice.
>>
>>
>>>> The view is an extraction of a simple diffuser, which I
>>>> want to mesh with hexa elements.
>>>>
>>>>
>>> ...but indeed, for this you would have to convert the iges file into geo
>>> format, since we haven't (yet) interfaced the structured meshing commands
>>> with general CAD files.
>>>
>> Sounds even better.
>>
>>
>>> Why is having more control points a problem?
>>>
>> It is actually not a problem, but the geo file gets
>> completely messy and I am not able to do the definition of
>> the mesh by hand!?
>>
>
> to generate hexas with Gmsh you'll currently need to define either
> transfinite volumes (cf. demos/transfinite.geo) or use extrusion (sweeping).
>
>
Forgot to say: thanks!
Fabian