Selecting items from a list based on a variable imput

[Joseph_Oster]

Reminds me of Rail Revolution.

Irregular Parametric Dome

It produces eight open breps when you only want one. Same with Laurent’s model. Sweep 1 is close but has self-intersection problems. Loft of BiArcs works pretty well, but it needs more division points to accurately follow the rail. [Just dome_2023Mar4a] Just dome_2023Mar4a.gh (26.6 KB) P.S. On second thought, Rail Revolution works fine with only one profile curve. [Just dome_2023Mar4b] Just dome_2023Mar4b.gh (25.6 KB)

Remarkably close, eh Maybe the same?

But to answer your original question, I added the white group which removes a duplicate arc and shifts the list of base segments.

Plan 1_2024Sep22a.gh (33.8 KB)