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["BORDEU Felipe (SAFRAN)" <>]

Thanks for the reply.

Ok, but do I have the warranty that the resulting mesh will be conforming (in 
a weak sense of course, because of the remeshing process) to the boundary 
(edges) of the polyhedral mesh.

 I think this image  (joint image) explain my problem.

I need the surface mesh to impose correctly boundary conditions 
(pressure/displacement/...) in a subsequence FEM analysis.  

Felipe


-----Message d'origine-----
De : 

 
[mailto:]
 De la part de Andreas Fabri
Envoyé : vendredi 20 mai 2016 10:37
À : 

Objet : Re: [cgal-discuss] mesh generation from levelset and preserving some 
things


Hello,

What we only understand now is, that you can accept a solution that remeshes 
the polyhedral surface.

As a matter of fact it is possible to write a model of a mesh domain that 
combines a polyhedral mesh domain and an image mesh domain.
It roughly boils down to a wrapper around two mesh domain classes that 
interrogates both and returns a combination of the results.

GeometryFactory can help to work out the details or implement it.

Best,

Andreas

On 19/05/2016 23:28, BORDEU Felipe (SAFRAN) wrote:
> Ok, I understand the problem and the limitation of my approach.
>
> So if I understand well, I have to :
> 1) load my stl mesh (with Polyheron_3???) (info: the surface defined 
> by the stl is not planar 3D surface)
> 2) remesh this surface with the " 3D surface mesh Generation"
> 3) load my levelset field (Done)
> 4) In some way force the 3D Mesh Generation  to respect my surface mesh (or 
> give the surface mesh as the starting triangulation).
>
> Is this possible???
>
> Thanks
> Felipe
>
> -----Message d'origine-----
> De : 
> 
>  
> [mailto:]
>  De la part de Laurent Rineau 
> (CGAL/GeometryFactory) Envoyé : vendredi 22 avril 2016 10:38 À : 
> 
>  Objet : Re: [cgal-discuss] mesh generation from 
> levelset and preserving some things
>
> Le Thursday 21 April 2016 15:18:12 BORDEU Felipe a écrit :
>> Thanks, but can you develop a little bit more your answer. Can I 
>> convert (read from file) my mesh into a Cgal mesh object?.
>
> The mesh produces by CGAL needs geometrical properties, mainly the Delaunay 
> criterion. If the mesh you want to preserve does not have that property, 
> the only hope is to remesh it using the CGAL 3D mesh generator, and then 
> there will be hope that you can write a custom mesh domain class, that 
> allows to mix you mesh with the levelset.
>
>> Or maybe I can use the Line Features to impose the edges and the 
>> points on the interface between domain to be meshed (levelset)  and 
>> my mesh so I get a compatible triangulation?
>
> If you do that, the lines, corresponding to the edges of the input mesh, 
> will be remeshed, and even then there is no guarantee that the facets of 
> the input mesh can be represented by union of Delaunay facets.
>
> --
> Laurent Rineau, PhD
> R&D Engineer at GeometryFactory           http://www.geometryfactory.com/
> Release Manager of the CGAL Project       http://www.cgal.org/
>
>

--
Andreas Fabri, PhD
Chief Officer, GeometryFactory
Editor, The CGAL Project

phone: +33.492.954.912    skype: andreas.fabri

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