Hi Dany,
I appreciate your thoughtful response.
The issue I am trying to address is slicing a real-world 3D scan of a boat hull. The data are messy, with scans overlapping, not always perfectly. The base surfaces, however, are quite smooth (or at least they should be!), so the slices can usually be represented by a simple NURBs curve.
In most cases, I can estimate the type of curve that should fit the shape (number of points and degree). Fitting the curves manually, however, is very time-consuming. Since all the “slices” can be presented by the same type of curve, I am hoping to come up with a solution that will automate some of this, which would be a very useful tool.
For context, here is the full curve I am trying to fit. The image in my first post is just one of the ends; I can see how it would look linear! 4,300 points and that is the low-resolution version of the scan!
Tom