CGAL users discussion list

[Andreas Fabri <>]

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