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Re: [cgal-discuss] Face ID in polygon mesh processing


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  • From: Andrea Borsic <>
  • To:
  • Subject: Re: [cgal-discuss] Face ID in polygon mesh processing
  • Date: Thu, 8 Dec 2022 10:46:47 +0100
  • Authentication-results: mail2-smtp-roc.national.inria.fr; spf=None ; spf=Pass ; spf=None
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Hi Sebastien,

Thank you so much ! This is what I needed.

Best Regards,

Andrea

On Thu, Dec 8, 2022 at 10:30 AM Sebastien Loriot <> wrote:
Hi,

did you look at this example?

https://github.com/CGAL/cgal/blob/master/Polygon_mesh_processing/examples/Polygon_mesh_processing/corefinement_mesh_union_with_attributes.cpp

Best,

Sebastien.

On 12/8/22 09:12, Andrea Borsic ( via cgal-discuss
Mailing List) wrote:
> Hi,
>
> I am using the
> function CGAL::Polygon_mesh_processing::corefine_and_compute_difference() to subtract a 3D triangulated volume from a second. On the resulting polymesh I'd like to identify the new facs that result from the intersection: one polygon is "carving away" part of the volume of the second volume, and I'd like to identify all the new faces that are now exposed on that "carved away surface".
>
> I have read a bit the documentation of the property maps, and I guess it
> might be possible to achieve this with those maps, but I am unsure about
> how to do it.
>
> Is there any good pointer for reading or any example that might help /
> shed some light on the use of property maps in this context?
>
> Thanks for any information !
>
> Best Regards,
>
> Andrea
>
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