CGAL users discussion list

["Sebastien Loriot (GeometryFactory)" <>]

Hello Jean-Philippe,

Jean-Philippe Pons wrote:
> Dear CGAL developers, 
>
> test_facet may return 'true' when testing a facet which creates a
> non-manifold vertex. So that a subsequent call to add_facet will
> unexpectedly fail. 
>
> This is because test_facet only checks if one of the vertices of the novel
> facet already has a full cycle of facets, which is not sufficient. It does
> not check if the novel facet closes a cycle, while there is another
> component of facets. 
Do you mean for example:
the HDS contains only one triangle. Then we insert a new triangle
incident to only one vertex of the first triangle?

> I have checked that the problem still exists in the latest version. 
>
> Cheers, 
>
> Jean-Philippe