How do I offset curve on surface

Grasshopper
1

InkedCanvas%20at%2013%3B45%3B59_LI
InkedCanvas at 13;45;59_LI.jpg1000×866 132 KB

offset.gh (65.6 KB)

Hi everyone.
I hope get offset curve that is no error on surface

Thank you~~

2

You can use this and projection; the result is better and faster
offset.gh (68.3 KB)

offset
offset.JPG1395×640 81.4 KB

1 Like
3

Graft the surfaces. Trouble is some of the offset curves are not closed.

scr
scr.JPG1388×631 97.7 KB

4

nothing changes
I want to get closed offset curves

5

Thank you so much~