Mesh Difference result

Rhino Developer
1

Hello,
I need assistance in trimming a lattice to obtain the resulting mesh inside a cube. I’m providing the outcome of a mesh difference operation where I’m using the inner lattice mesh as the first input and a cube as the second input. Could someone please guide me on how to achieve the opposite result of what I’m currently obtaining?
Original object

MicrosoftTeams-image (1)
MicrosoftTeams-image (1)706×415 173 KB

After performing difference
MicrosoftTeams-image

2

Hi @Supriya

this looks like a difficult case. Without the model, it’s hard to give many suggestions.
Have you tried this in Rhino 8 WIP? All mesh boolean commands are rewritten.

Thanks,

Giulio

–
Giulio Piacentino
for Robert McNeel & Associates
giulio@mcneel.com

3

Hii @piac This is stl file of the model result.stl (3.1 MB) .Both mesh are there.
I am working with rhino7.

4

You can try with Dendro

image
image852×776 75.5 KB

Rhino 8 WIP (free at the moment) seems to work but not solid.

image
image881×781 189 KB

BUT
your lattices are awful/bad not joined not touching … So garbage in => garbage out

Dendro could save you here.

5

image
image1535×755 139 KB

This is Rhino 8 BETA work to create sharp cuts.

  • Step 1: Shrinkwrap to obtain a single solid mesh (You can do this in Dendro afaik). We need to get rid of the fragile overlaps
    image
    Another option, which I leave up to you, is to precisely match vertices and then join faces, without fragile constructions. You can optionally AlighMeshVertices if you created almost correct work.

  • Step 2: I then used ReduceMesh, target count 300’000 vertices to improve the resulting mesh.

  • Step 3: MeshBooleanIntersection in Rhino 8 BETA. Rhino 7 has less robust booleans. They may still work sometimes.

The result is correct.

image
image924×400 66.5 KB

result.3dm (6.4 MB)

6

Thanks @laurent_delrieu its working fine

7

Thanks @piac we will try this one.