I saw a film, there was some saying : Give me names of wild animals! Answer: Evil butterfly!

My first mind was calculate curves curvature, but it's to long so CCC, but I can't speak french so it's up to you how you will translate it. The right name in english is comp curve, I think. I read also porcupine analysis, but I think it's for surfaces and also a word used by Dassault. I'm not shure if they can english really. Some other naming in CATIA was raising my doubts in the past;-) Anyway, In french most of the things sounds better and more graceful.

Have a nice day
Karsten