Finding the central curve on polysurface and orient surface

[anon39580149]

You can try this way:
1- Create a surface from the curves, apply black material and print it as image.

2- Use the result image with the script of @laurent_delrieu to create medial axis

Medial Axis from multiple closed curves, middle of double lines

Ok here a little code that uses 95 % of code from TAW. This code is doing thinning of an image https://homepages.inf.ed.ac.uk/rbf/HIPR2/thin.htm [image] [image] You must have a good black and white image. If not … [image] image_thinner_LEGACY.gh (7.2 KB)

image_thinner_LEGACY_m.gh (10.4 KB)