Meshing surface: triangular diagrid

Grasshopper
1

Hi All,

I’ve been trying to create a diagrid using a surface, however I’ve been struggling to obtain the result I want.

This is what I’m trying to create:

diagrid
diagrid.JPG848×479 36.1 KB

I started with the surface and used Divide domain and deconstruct Brep however this is what I get when I used either a combination of List items or Cull Pattern:

diagrid%20missing%20segments
diagrid missing segments.JPG1079×417 35.4 KB

As you can see I’m missing the elements on the red dashed lines.

I tried to use the Faces of DeconstructBrep instead of points, but I need to get straight lines and not curves, and they need to meet at each node, while in my GH they don’t.

Diagrid.pdf (346.4 KB)

I exported the model and my GH:
Export.3dm (81.6 KB)
Export.gh (19.0 KB)

Any help would be very appreciated!

I looked at several tutorials online but they all achieve diamond-shaped diagrid, while I’m trying to get a fully triangular mesh.

Thanks!

2

If you use the Lunchbox plugin’s Triangle Panels B, the result is the same as shown in the attached screengrab.

Canvas%20at%2021%3B32%3B50
Canvas at 21;32;50.jpg1397×652 157 KB

3

Hi HS_Kim, that looks promising I’ll install Lunchbox and test it!

Is there a way I could group the segments?
(say diagonals, verticals, etc)

4

Canvas%20at%2023%3B03%3B58
Canvas%20at%2023%3B03%3B581618×617 209 KB
Export_re.gh (25.1 KB)

5

That’s fantastic, thanks a lot HS_Kim.

For some reason branches 1 and 4 are very similar but include either the first or last vertical segments.
I’ve combined the two branches using Trim tree and then removing the duplicate lines.
I’m still getting familiar with data trees so there might be a more clever way of doing this.

example