CGAL users discussion list

["Sebastien Loriot (GeometryFactory)" <>]

On 03/06/2014 07:52 AM, swistak06 wrote:
> Thanks for quick response.
> The exampliar input files are here:
> https://www.dropbox.com/s/nywdv80yzr0wpxp/henley_3D.off
> https://www.dropbox.com/s/slxzfwhchpuix2p/henley_shift_3D.off
>
>
>
> --
> View this message in context: 
> http://cgal-discuss.949826.n4.nabble.com/Problem-with-Polyhedron-3-demo-intersection-of-objects-with-the-same-vertices-tp4658911p4658913.html
> Sent from the cgal-discuss mailing list archive at Nabble.com.
First problem, your polyhedra are inconsistently oriented (which explain 
the checkerboard coloration when you open them in the demo.

Second problem you have non triangular facets which would not
be a problem for Nef if the vertices of the facets were coplanar
(which is not the case).

To fix this you can use the "Orient polygon soup" plugin and "Inside 
outside" plugin to fix the orientation.
The plugin "Triangulated facets" will help before creating nef polyhedra.

Sebastien.