hi guys, i want to create some curves on surface . but i can’t control the direction of them when i use the CrvSrf command. does anyone know the problem? what can i do? [%E5%BE%AE%E4%BF%A1%E6%88%AA%E5%9B%BE_20190803125014] [%E5%BE%AE%E4%BF%A1%E6%88%AA%E5%9B%BE_20190803125040]

Post your code. [image] Help Us Help You Grasshopper Asking questions and getting answers is what this forum is all about. Although people are generally very helpful, there are things you can do to improve your chances of getting good and quick answers. Below you will fin…

hi Joseph I used your gh.but the outcome is a little different from what I expect. I still want to use the “Crvsrf” command. and I think there is something wrong with the “uvP”. I don’t know how to solve the problem. Would you like to help me check my gh? thanks !!! [1] [2] [3] CrvSrv.gh (31.0 KB)

CrvSrf (Curve On Surface) will not generate curves that cross the seam, so the best alternative I can think of is this: [crvOnSrf_2019Aug9a] crvOnSrf_2019Aug9a.gh (15.1 KB) It finds the shortest CrvSrf and replicates it by rotating it around the center. Good enough? P.S. Turns out that a bit o…

Just for fun… Applying logic similar to that used here: [image] Sorting question Grasshopper I didn’t wait. No plugins required. [arc_fan_2019Aug9a2] arc_fan_2019Aug9a.gh (16.5 KB) Algorithms + Data Structures = Programs – Niklaus Wirth , 1976 book [arc_fan_2019Au…

wow it solve my problem. thanks a lot. this is really a good way. But when i replace the circle to ellipse, it doesn’t work again. just like you mentioned the issue is curves can’t cross the seam. So i find another way from the forum. it use the “relative item” component to solve the problem. it wor…

CrvonSrf_2019Aug14.gh (19.6 KB) [image] I wanted to try to color up @jiangying4692 ’s solution, but the seam is causing problems, which @Joseph_Oster was able to avoid with his solution. I was wondering (and it had come up in another post of mine), is it possible to join the white surfaces to the …

Check attachment. [Canvas%20at%2017%3B21%3B31] CrvonSrf_re.gh (23.2 KB)

Check this as well. [Canvas%20at%2018%3B48%3B49] CrvonSrf_rev2.gh (29.8 KB)

[image] jiangying4692: But when i replace the circle to ellipse, it doesn’t work again. just like you mentioned the issue is curves can’t cross the seam. Naturally, the model that relied on a surface of revolution won’t work when that assumption isn’t met, though the first method I suggested …

The direction of curves on surface

Grasshopper

Joseph_Oster August 3, 2019, 10:00am 2

Post your code.

Oh well…

crvOnSrf_2019Aug3a.gh (20.4 KB)

Topic		Replies	Views
Crossing points Grasshopper rhino , grasshopper	1	944	November 16, 2019
Trouble creating curve on surface Grasshopper	4	672	February 6, 2018
More question about command InterpCrvOnSrf Scripting	2	479	August 17, 2020
Curve on Surface Grasshopper	7	969	November 13, 2018
Solid from curves Grasshopper windows	15	996	April 6, 2023

The direction of curves on surface

Related topics