Today I have such a problem / challenge.
(I’m just learning grasshopper)
I thought that I make a hole in this brep: /.
This edge (light green) is the common curve for red and green curves.
I wanted to find index of these selected curves (green curves) (using “item index”), but I couldn’t (item index returned -1).
And I thought that, later I would use, for example: set difference, set union, equality …), but I couldn’t find the indexes for these curves.
Maybe someone smarter have some idea?
Is it even possible to find these edges?
(sorry for my English)
ps. Maybe the way I selected surfaces is not very good, maybe you know better?
Ask.gh (96.5 KB)