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Re: [cgal-discuss] hybrid 3D surface mesh generation


Chronological Thread 
  • From: Andreas Fabri <>
  • To: "\"F.A." "Perez\"" "(" via cgal-discuss Mailing "List)" <>
  • Cc: Sebastien Loriot <>
  • Subject: Re: [cgal-discuss] hybrid 3D surface mesh generation
  • Date: Tue, 8 Sep 2020 08:59:33 +0200
  • Authentication-results: mail2-smtp-roc.national.inria.fr; spf=None ; spf=None ; spf=None
  • Ironport-phdr: 9a23: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

Hi again,


Just out of curiosity, what are you meshing that you expect "meshing times in the order of days"?


Best,

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



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