CGAL users discussion list

[Andreas Fabri <>]

Hi Kim,

The surface mesher is essentially a volume mesher without quality constraints on tetrahedra.
So it won't be faster. 

Best regards,

Andreas

On 9/8/2020 8:13 AM, "F.A. Perez" ( via cgal-discuss Mailing List) wrote:

        Dear Sebastien,

Thanks for the reply! I did consider this option but would this not still mean higer meshing times and memory use since I am still essentialy creating a volume mesh, albeit neglecting the quality of the inside mesh. Given that I expect meshing times to be in the order of days sometimes and with high memory use (especially if creating a volume mesh in the process) my hope was I could use the faster and less resource intensive 3d Surface mesher somehow. I am aware for speed I can go for parallel but the memory issue would remain. Or is the difference in memory use rather limited?

        Regards,
      
        Kim

---

From: on behalf of "Sebastien Loriot (GeometryFactory)"
Sent: Monday, September 7, 2020 6:53 AM
To:
Subject: Re: [cgal-discuss] hybrid 3D surface mesh generation

 

You can use the 3D mesher for that purpose. You can simply remove any
criteria on the tetrahedra and use
CGAL::facets_in_complex_3_to_triangle_mesh() to extract the surface facets:

https://doc.cgal.org/latest/Mesh_3/group__PkgMesh3Functions.html#ga68ca38989087644fb6b893eb566be9ea

Best,

Sebastien.

On 9/6/20 10:12 PM, "F.A. Perez" ( via
cgal-discuss Mailing List) wrote:
> Dear CGAL developers,
>
> I would like to use the 3D surface mesh generation capabilities of CGAL
> in a mode similar to the hybrid mode of the 3D mesh generator (i.e. use
> both an implicit domain and a polyhedral domain) but could not find
> anything about this being posible. Is there any way of achiving with the
> 3D surface mesher? The reason is I would like to provide a geometry
> given by a polyhedral domain with an infill given by an implicit domain.
>
> Kind regards,
> Kim
>
>
>
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-- 
Andreas Fabri, PhD
Chief Officer, GeometryFactory
Editor, The CGAL Project

phone: +33.492.954.912    skype: andreas.fabri