Node Sweep

First perplexity who is double!

What is sequence P abcabc - aabbcc ?

What is the last line NumPts? Seems there are not the Numbers of Profils' Pts (become 3 for the "star") seems not the number of sections --- ???




Edit: a miracle! - there is a documentation for the Extention Sweep node inside the extensions file !!!
So seems my 2 questions are resolved! :)