CGAL users discussion list

[Jane Tournois <>]

Hi Hugo,

we have created a pull request [1] that should fix this function. It 
will be tested in the coming days before it is integrated to the master 
branch, but you can already experiment with it.

Best regards,

Jane.


[1] https://github.com/CGAL/cgal/pull/2057


Le 06/04/2017 à 11:27, Hugo Ledoux a écrit :
> Greetings,
>
> I have one mesh whose normals are pointing outwards, but the function
> CGAL::Polygon_mesh_processing::is_outward_oriented() returns
> otherwise.
>
> I have checked the code and the average of the normals of the faces
> incident to the min-vertex is used, which conceptually I doubt should
> work… And it doesn’t work in my case (unless I made a mistake
> somewhere), you can download my OFF file, along with the code I used,
> there:
> https://www.dropbox.com/sh/49as9yt139v6kxk/AABXI3Nh4ZfqCEDWHyv8Q-Zja?dl=0
>
> If other ways to compute the normal were used (eg by using the area of
> the face as a weight), then the x-component of the vector could be
> negative (as is used by cgal), but I am wondering if that would always
> work. I think not.
>
> Any comments appreciated, cheers,
> Hugo Ledoux

--
Jane Tournois, PhD
R&D Engineer at GeometryFactory
http://www.geometryfactory.com/