CGAL users discussion list

["Sebastien Loriot (GeometryFactory)" <>]

When I open you files in the CGAL polyhedron demo, it is telling me that
your meshes are polygon soups (meaning you have non-manifold edges).
If I duplicate those edges to make it a self-intersecting surface
I have the following set of intersecting faces.

Sebastien.

On 12/05/2017 05:22 PM, Sean Hardesty wrote:
> I have a collection of meshes that overlap slightly, so I am going 
> through a loop removing overlapping pieces. It works for a while, but 
> eventually I run into trouble. I am calling 
> PMP::corefine_and_compute_difference(CGAL 4.11) on a pair of meshes that 
> satisfy
>
> !CGAL::Polygon_mesh_processing::does_self_intersect
> CGAL::Polygon_mesh_processing::does_bound_a_volume
>
> and I get the following:
>
> terminate called after throwing an instance of 'CGAL::Assertion_exception'
>    what(): CGAL ERROR: assertion violation!
> Expr: hedge!=start
> File: 
> /usr/local/include/CGAL/Polygon_mesh_processing/internal/Corefinement/Visitor.h
> Line: 663
> Aborted (core dumped)
>
> They are fairly small, so I wrote them to .off format and attached them 
> to this message. I am aware from your documentation pages that there can 
> be problems with sequential boolean operations, so I am using the kernel 
> with exact predicates and exact constructions. Maybe the precision in 
> the .off format is inadequate to diagnose the problem. I would be 
> grateful for any help that can be provided.
>
>      Sincerely,
>      Sean Hardesty

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