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["Sebastien Loriot (GeometryFactory)" <>]

If you want to reverse the orientation of each facet you can directly 
call Polyhedron_3::inside_out().

Sebastien.

johnzjq wrote:
> Hi all,
>
> I am trying to invert the normals of facets in a polyhedron_3. 
>
> A fast way is to modify the connections of halfedges inside each facet.
> However, I found functions such as set_next() and set_prev() are private
> members of class I_Polyhedron_halfedge. How to use these functions? or are
> there exist some alternate operations?
>
> Another way is to reconstruct a new polyhedron, which is clumsy solution I
> think.
>
> Your help would be appreciated!
>
> John.Z
>
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