How to create a linear weaving pattern on a global geometry?

[Max3 (Max Allstadt)]

Here’s something similar, but for rectangular cross section parts. It’d probably be easy to swap in round cross sections, probably easier to work with round than square, actually:

Tongue and Groove

Improved it. Making the rectangles by using rotation relative to their rib curve to get the third point was bad. The third point should be normalized to our source surface. Achieved that using offset surface and surface closest point. The previous version failed badly with more extreme curvatures. This does better. Ribs and Rails.gh (41.8 KB) [ribs and rails 1] [ribs and rails 2]