Thanks for the papers, it is interesting as I have done some tools for 3d printing this could be a nice addition. Also it looks very similar to this problem
But let me think It already works quite like that !
Going back to Medial Axis and roof, I will join the 2 tools (Polyline and Arcs/Lines) in one tool as I can use the same code.
So it will look like that. You will be free to transform curve to polyline or arcsAndLines. If you provide polyline, it must stay polylines (already like that with the new component).
