My approach was wierd and based on experiments and a bit wierd calculations like "here’s the experimental “magic number” which work. How i can get this number based on numbers which i already have like resolution and so on. Which number i can multiply, divide or add to get the “magic number”.
Eventually i can notice some “system” in numbers and form a formula.
It leads me to my solution which works, but only for spline mesh based on Arc.
Im not skilled in geonodes and all that “index math”, so i wonder maybe some one have different methods for such selections and it are more easy and understandable?
I did a bunch of this index-style sorting of rings along curves and toruses in my first big GN project. You can get it for free here, it’s got it stored in a bunch of node groups for the tesla coil.
Additionally, replacing the Index with Spline Parameter Index you get something which becomes agnostic of the curve and profile dimensions (and works with multi-curve setups):
Yeah I meant the multiply of the inputs, you saved that at the cost of storage space. Thanks for counting. It was rather a comment on your “so much math”, but forget about it.