CGAL users discussion list

[Andreas Fabri <>]

 wrote:
> Hi, all
>
> I got a polygon mesh (stored as a Polygon_3) with wrong winding. Is there any 
> way to reverse its winding?
>
> I'm thinking of reversing all halfedges in the mesh one by one. Is it 
> possible to reverse the orientation of a halfedge?
>
> Thank you.

Hi Kevin,

This one should do it:

void      Polyhedron_3<..>.inside_out ()           reverses facet 
orientations (incl. plane equations if supported).


andreas