extract spheres from extruded surface

Hi,

I'm new in grasshopper and I'm trying to substract some spheres, that are reducing as they move away from the center of some concentric ellipseis, from a surface that i have extruded it. I used the sdiff command but when I run it, it seems that it can not substract the spheres.

Please help :)

Attachments:

form_crater.gh, 13 KB

Replies to This Discussion

Permalink Reply by Shridhar Mamidalaa on May 18, 2015 at 10:39am

What does "it can not Subtract" mean ??? is it crashing ??? or the difference is unexpected ??

I tried a small version of yours and observed that its a heavy operation.

Permalink Reply by Katerina K on May 18, 2015 at 12:46pm

Thank you for your reply, the difference is unexpected...it keeps only some spheres...
I tried with fewer spheres but nothing happened either...
In your example the surface seems solid,my surface is extruded so I have to see holes with the sdiff command...
I don't know if the problem is with the geometry of my surface though...

Permalink Reply by Shridhar Mamidalaa on May 18, 2015 at 12:55pm

I made a similar profile and revolved to make that surface and capped it to make a solid try this method. i would also suggest u to try ("MeshBrep" to make ur srf a mesh and use mesh spheres to subtract. meshes are comparatively fast "