TOMASZ GARSTKA a écrit :
Thomas thank you very much for the presentation. Looks very
interesting.
One more question What is the quikest way of defining an edge(line)
passing through 3 points in 3d space.
Is there something like a spline in pythonocc ?
Hi Tomasz,
Take a look at the Jelle's 'geometry demo' script I just commited.
You'll find an example of the use of the function
GeomAPI_PointsToBSpline in the 'curves3d_from_points' demo function.
Thanks,
Tomasz
Best Regards,
Thomas
> Date: Fri, 20 Mar 2009 17:17:31 +0100
> From: thomas.pav...@free.fr
> To: tomasz_gars...@hotmail.com
> CC: pythonocc-users@gna.org
> Subject: Re: [Pythonocc-users] converting FE mesh to IGES
>
> >Objet: [Pythonocc-users] converting FE mesh to IGES
> >
> >
> >Hi,
> >I am working on a reverse engineering problem. I would like to
convert deformed finite element mesh to IGES or STEP format. The mesh
is constructed from quadratic hexahedral >elements. I would be
grateful for any suggestions.
> >
> >Thanks,
> >
> >Tomasz
>
> Well, IMHO, this is not a pythonOCC nor an OCC issue. It's rather
a conceptual problem. Let me sum-up my understanding (tell me if I'm
wrong):
>
> (1) you have a STEP geometry that you want to compute,
> (2) you mesh this geometry,
> (3) perform FEM on the mesh,
> (4) you want to export the deformed mesh back to a STEP geometry.
>
> The problem is then:
> (1) BREP geometry (exact)
> (2) Mesh geometry (approximation of 1)
> (3) Deformed Mesh geometry (not exact)
> (4) back to exact geometry (BREP).
>
> I was at a french scientific conference a few months ago and a guy
talked about that subject. It's still quite open... The
proof-of-concept was achieved for a cube or a sphere, but that's all.
According to what I understood, it's a need expressed by the automotive
industry to optimize the fitting of the parts of an engine. A lot of
scientists work on that issue (unfortunately, I'm not the guy who can
help you).
>
> This is the homepage of the conference (slides in english):
http://www.univ-valenciennes.fr/sp/CAOCalcul/programme.php
>
> I suggest you the reading of Alain RASSINEUX's presentation:
http://www.univ-valenciennes.fr/sp/CAOCalcul/document/CAO%20CALCUL/Presentations/05%20-%20ARASSINEUX.pdf
>
> Cheers,
>
> Thomas
>
>
>
>
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