Yes, the ?a:b is a convenient way of doing inline conditionals:
and I was using
(j + 1) % fi
to make sure the indexing wraps when taking the next point around the boundary (to get the edge between vert 2 and 0 if it is a triangle, or between 3 and 0 when it is a quad).
I’ll make sure isolated point inputs work properly in the next release
(it was working before, and the code is all still in there, I just changed the component at the last moment from having separate inputs for feature points and feature curves, to having one combined input, and forgot to properly update the data types and casting)
I’ll also update the component to allow the setting of isolated feature points which do not already exist in the input Brep or Mesh.