CGAL users discussion list

["Sebastien Loriot (GeometryFactory)" <>]

If the output of the union is non-manifold and the function is returning
false to indicate it.
The two boxes are sharing only an edge so the union will be non-manifold
and cannot be represented in a halfedge data structure (without creating 
self-intersections).

There is some on-going work to handle those operations with 
self-intersections but nothing is publicly available for now.

Best regards,

Sebastien.




On 6/8/20 11:40 AM, Giles Puckett wrote:
> Hello all,
>
> I have caught PMP (CGAL 5.0) failing to do a corefinement and union, 
> after creating meshes out of simple shapes (cylinders and rect prisms). 
> No self-intersection exception is thrown.
>
> I have reproduced the problem by writing OFF files in double precision. 
> A test program and files are here:
>
> https://www.dropbox.com/sh/7sv3p0yxomsjrxn/AAC_xP_HH9EoMFajZSpK4m71a?dl=0
>
> I built on Windows 10 using Visual Studio 2019 (tool set 1.42). The 
> source is a modification of one of the PMP examples and it builds under 
> that environment. CGAL is at 5.0. Let me know if you want me to raise an 
> issue.
>
> G.