I am a newbie to Rhino, may I ask how to restore the two graphics in the photo in Rhino? For example, if I draw a plane or a vertex on the top, the sweep line of the graph, and the wave curve at the bottom, what operations do I need to perform to create such a untrimmed surface? Because I tried split graphics, I got a trimmed surface, I need an untrimmed surface for input in the grasshopper operation. Thanks in advance
Doesn’t actually work in this case, while in theory it seems easy enough, in testing with the OP’s original input rails and profile, Sweep2 is just not capable of doing this without making a self-intersecting mess. NetworkSrf however does seem to make a surface, will put that in another post.
Here is an experiment I did - in the file below, which used the original curves above, I just moved them to be symmetric around 0 for easier manipulation - I made a revolved trimmed surface and an untrimmed NetworkSrf. I was not able to get decent results from either Sweep2 or Loft, maybe someone is better than me can do it…
I actually did get a bit better Loft surface by using some intermediate profiles and rebuilding them all the same. But the lower edge does not match the rail exactly and the Zebra is not anywhere near as good as the revolve. Might be useful in some cases though.
I can see how the U direction squiggles a bit, so I’d have to try a trick where I extract only the V direction and get Rhino to recreate the U direction. And probably the same for the V and repull the network again.
I’m not sure the ripple can be removed 100% though. that’s kind of a crazy surface to make untrimmed lol.
The trick of going back n forth with most U or V network while utilizing “original boundary”, is a way to get each direction to ‘relax’, and the finally using a smoother pull surface template to repull it – ultimately getting a final untrimmed version with minimal ripple…