[OpenSCAD] avoiding assertion violation

nop head nop.head at gmail.com
Wed Jul 17 09:23:01 EDT 2019


How does it differ from the OP's?

On Wed, 17 Jul 2019 at 13:53, <arnholm at arnholm.org> wrote:

> On 2019-07-17 14:04, nop head wrote:
> > I think rotate extrude does its work in PolySets which, just like STL,
> > is a polygon soup and cannot represent a 2 manifold with self
> > intersections.
>
> If so, that is a truism. In a polygon soup by definition you have only
> 1-manifold edges.
>
> > Then when that is given to CGAL it barfs.
>
> It didn't in the case I showed.
>
> Carsten Arnholm
>
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