Find the index of the points of an edged torus. "MemberIndex"

Grasshopper Developer
1

I came across something strange …
I would like to find out the indices of the points. This was no problem for other breps, but I don’t get any results for this form.
I’ve already tried

List.IndexOf ()
Dictionary.ContainsKey ()

image
image1506×663 120 KB

Hence my question, how does the MemberIndex component work, since it reflects the results?

IndexOfEdgedTorus.gh (91.3 KB)

2

GH has its own mechanism for comparing types, and to compare points it must use some tolerance that does not use generic comparators. You can either convert the points to GH_Point or use your own comparator that makes two points with a difference of less than a tolerance the same point.