How to create one surface through 3 closed curves?

Grasshopper
1

Hello all !
I try to create one surface through 3 closed curves but none of the Grasshopper components for creating surfaces from curves work.
Here is a grasshopper canvas to explain.
Thank you for your help !

To explain my issue to create one surface through 3 closed curves.ghx (295.5 KB)

JLuc

2

This looks familiar:

This is a “painted myself into a corner” problem that could easily be solved if the base surface (spherical?) were available - except the tiny piece is apparently on a different surface?

DUPLICATE threads don’t help.

3

Here is the grasshopper canvas updated with the base spherical surfaces.

To explain my issue to create one surface through 3 closed curves.ghx (347.6 KB)

JLuc

4

I’m not going to touch this again but for anyone who wants to try, there are three curves on two or three different spherical surfaces and @johnluc_fr is looking for a smooth transition between them.

5

Why don’t you want to touch it anymore ?
Should I consider that the solution is in your previous posts ? :thinking: :slightly_smiling_face:
JLuc

6

Hello all !
Here are some attempts at solutions but without real success :woozy_face:

To explain my issue about transition surface between 2 surfaces.ghx (1.4 MB)

If you have any ideas, they are welcome !
Thanks.
JLuc

7

Hello
This is a difficult subject. There are tons of discussion about surface with nice curvature. Some are masters to make some nice transitions. XNurbs seems a good tool for that. Look at discussion on the tool, on class A surface, G1, G2 … I think the difficulty is also the difference of scale. I tried to make it with some others curves (blend crv) and Network surface but without success.

1 Like
8

Thank you for the information. It also seemed to me that the problem was not that easy to solve.
I tried installing the Rhino XNurbs plugin but it fails to load. When loading, Rhino 5.0 quits on its own.
Happy Holidays !
JLuc

9

I think I almost found it, but how do I get a single surface instead of a Brep at the end ?
Thank you.

Here is a start of solution :
A solution to create transition surface between 2 surfaces.ghx (2.5 MB)

Happy new year 2021 !
JLuc