How to surface between 2 complex curves ？

[suker]

Hi everyone,
I have three open curves (see image): the red one in the middle and the two black ones on top/bottom. A simple Loft gives a self-intersecting surface, so I’m looking for a clean Sub-D or NURBS patch instead.

What I already tried:

• Loft → twisted/self-intersects

• EdgeSrf → same problem

• NetworkSrf → needs one more direction

  model.3dm (209.2 KB)

My goal is a single, smooth surface I can later trim or convert to Sub-D.
Does anyone have a Grasshopper definition (or native Rhino workflow) that can build a nice four-sided patch from these three inputs? I’m happy to add helper geometry if needed.

Thanks in advance!

[jessesn (Jessesn Chen)]

@suker

Does anyone have a Grasshopper definition (or native Rhino workflow) that can build a nice four-sided patch from these three inputs? I’m happy to add helper geometry if needed.

How about the TriRemesh ?

Grasshopper Online Document

TriRemesh.gh (21.8 KB)

[suker]

我希望能得到一个锐边，类似这个图片的效果

“I hope to achieve a sharp edge, similar to the effect shown in this image.”

[Lagom]

That’s a very well-made styrofoam mock-up right there, respect.

[jessesn (Jessesn Chen)]

@suker

“I hope to achieve a sharp edge, similar to the effect shown in this image.”

You can create sharp edge with height based on the solution I provided earlier, for your reference.

[diff-arch]

You can achieve a similar result with Kangaroo:

kangaroo-rev1.gh (33.0 KB)

[suker]

Thanks

[suker]

great！