Split object into parts

[tomriefe]

Hello,

I have an organic object I want to split into pieces. It would be ideal if the parts were roughly the same size, but haven’t had much success. Any thoughts would be appreciated.

Thanks

Branch to split.gh (4.2 MB)

[laurent_delrieu]

Hello
there was a discussion on this subject here

Split a Large Mesh for 3D Printing

[image] Instead of splitting the mesh, I think I would rather use Mesh Difference and subtract very thin boxes and at least one cylinder per plane. The cylinder is later used to reinforce the joint with a threaded rod. [image] SplitMeshFor3DPrint.gh (894.6 KB) PS: Your quad remesh had two internal voids. I deleted them.

Bison skull

“I want one of those engraved bison skulls with the horns” she said… [BISON_3] [BISON_4] [BISON_2] This is a remix of this amazing 3d scan of a fossilised bison skull… https://www.thingiverse.com/thing:2772592 I used Rhino QuadRemesh to create a smoothed, symmetrical mesh and then used @laurent_delrieu’s maze on mesh tool available in the Nautilus plugin. It took a long time to process the maze but I think it looks amazing. I had some great help from @martinsiegrist in this topic to split…

Here I have tried another solution, it has some plugin, some of them could be skipped and other changed.
But the logic is
1)Generate a solid brep/mesh of the object, I use here Dendro to close the mesh, it is not 100 % perfect but seems to work here.
2)Generate points inside the volume

3)Cluster these points with K-Mean clustering for example

K-Means Clustering

Hi all, I am wondering if anyone is familiar with the K-Means clustering component in the Ivy Plugin? I am interested in implementing the algorithm through either C# or python in GH in general (and ideally with no plugins) for panelization of surfaces with limited number of unit types similar to this: I’ve come across two threads on the old forum but haven’t been able to see much of the codes 1.https://www.grasshopper3d.com/forum/topics/kmeans-1?id=2985220%3ATopic%3A215631&page=1#comme…

Create a "Paint by Numbers" script

Here an idea like I used for mosaic using K-Mean Clustering, has color are transformed to points (in [-1, 1] space). I then use mesh IsoSplitting but you could use Mesh Contour, Mesh Plane Intersection … K-Mean Clustering is very sensitive to initial condition, so change seed value. There is surely a better approach but I don’t know it. I also did it a bit fast, so there could be some glitches [image] split image.gh (24.1 KB) Bird [image] And smoothing the contours, filtering by area ……

…
4)Calculate the center of the Cluster
5)Make a 3D Voronoi (intersection with object will be a plane or planar surfaces.

6. Make solid intersection

12 pieces here

5 pieces

40 pieces

Bison is not exactly what wanted @martynjhogg has it is volume
Volume from 1.8138e+6 To 3.2192e+6

And if you want the most stable positions, use stable positions From Nautilus plugin

Branch to split LD.gh (5.1 MB)

[tomriefe]

Wow, this is extremely helpful, and much better than the results I got. I am going to look through this more closely. Thank you

[laurent_delrieu]

As you object is not closed, there are still some problems.
Cap close one main hole.
The other require some little work

[tomriefe]

Thanks, yea the form will require some clean up. I was initially thinking it would be easier as a shell, so I had actually cut the base off the branch. When I saw your solution for splitting as a solid that makes a lot more sense.

[martynjhogg]

This could be a very useful tool @laurent_delrieu !
I wonder if you could add a pair of dowels between each face to aid with assembly?

[laurent_delrieu]

Yes it is possible
Rough version there, time to go to bed

Mesh split LD.gh (878.2 KB)

[tomriefe]

@laurent_delrieu you just referenced this post, and that reminded me that I never posted a picture of my project completed. I was able to 3D print the mold in the sections that you helped me split, then I cast and reassembled the parts. Here it is, and thank you again for your help.