Gridshell with similar length

[ptik.s501]

Hello there,

so I am relatively new to GH so this may be an easy to fix problem. I found the attached file in an old discussion https://www.grasshopper3d.com/forum/topics/gridshell-with-similar-length?page=1&commentId=2985220%3AComment%3A1317248&x=1#2985220Comment1317248
and I want to add the angular values of the draped mesh (see attached picture) but I dont exactly know how to do that.

I would really appreciate if somebody could help me

gridshell_drape (1).gh (19.1 KB)

[DanielPiker]

Hi @ptik.s501
Here’s a recent example of an equal edge length gridshell

Hanging mesh / Similar meshsize

To make a quad net with equal edge lengths (also known as a Chebyshev net), it is easier to approach by draping a full grid then cutting off the parts beyond the plane: drape_sphere.gh (8.1 KB) [image] Cutting a flat mesh to a circle then anchoring the points around the boundary as you were doing will result in crumpling, because it prevents the angles from changing as they need to to form a smooth curved surface.

When you say you want to add the angles, do you mean to show them as dimensions? or to actually control them?
If you have a target surface and equal edge lengths, this generally determines the angles (i.e. the varying corner angles of the quads is what allows the grid to fit the shape without changing edge lengths).

[ptik.s501]

Hi Daniel,

thank you for the reply.
Thats actually an another interesting example on how to construct these gridshells.

But I face the same problem here. I actually want to display or show the angles in the mesh itself, but I find it rather difficult because the resulting draped gridshell isn’t a mesh anymore.

Best regards
Patrick

[DanielPiker]

To keep the mesh use a ‘Show’ component like this:

[ptik.s501]

Could you send me a link to that file? I’m a newbie so I dont know what component that is or where to find it.

Thanks for your help

[DanielPiker]

Ah sorry, I mean to include it in my last post:
drape_sphere_dim.gh (10.2 KB)