PhongToSpline plugin for Cinema 4D
https://www.youtube.com/watch?v=Zvpf58nCGC0
Allows you to create Splines from Phong Angles of Mesh Objects. You may be surprised to learn that it's called "Phong to Spline".
Using the Phong Angle in the Phong Tag, you can Procedurally create Splines from the Phong Breaks, and also from Isoparms.
Compatible with C4D R20 and above.
This is a plugin from Athanasios Pozantzis (Noseman).
You can follow Athanasios on Twitter here: https://twitter.com/nosemangr
Or like and subscribe to his YouTube channel: https://www.youtube.com/channel/UCkWGnSaQR_XBMe3Yx4WHJ5Q