NURBS Surface from Level Curves

Rhino Developer
1

Hello,

Does OpenNURBS or RhinoSDK provide any algorithm to convert a list of curves (these are level curves) into a NURBS surface?

Thank you.
Regards
Sunayana

2

Hi Sunayana,

Can you post a sample 3dm file that contains your curves? If you were using just Rhino commands, what would you do?

– Dale

3

Hi Dale,

Thanks for your response. I am attaching the 3dm file with the level curves, I wanted to create a single NURBS surface from these curves, would you know of a way to use the curves to directly do this.
This is how the original stl file looks like
[cid:image001.png@01D28887.E5532680]

Thanks and Regards,
Sunayana

image001.png447×696 28.4 KB

pipeL-curves.3dm (149 KB)

4

In looking at your model, I would probably Loft curves together to create the shapes. I would probably not use most of the intermediate shape curves, as they will just make a more complex surface than needed. And because of the sharp crease, I would run two loft operations - one for each direction.

Have you tried using Rhino’s Loft command?

5

Hi Dale,

Sorry for the delay, and thank you for the idea of lofting. It works pretty well for this surface. I will try it on more organic shapes and get back to you in case I get stuck.

Best
Sunayana