polysurface offset with planar bars in between...

Hey grasshoppers,

I'm just working on a project with an double-curved polysurface (pictures below).
It is a triangulated surface which should be made out of triangular polycarbonat-boxes. For production-reasons I am now looking for a way to offset the triangles with the bars inbetween to be planar.
I tried to use the normal-vector of each triangle, but now those vectors need to be varied to achieve planarity.
Does anyone know how to handle this problem?
Or is there a way to use shelling in Grasshopper with that additional condition?
The result should look a bit like this voronoi-dome

Thanks a lot in advance,

ole

Replies to This Discussion

Permalink Reply by taz on June 26, 2010 at 1:55pm

Shelling isn't an available option in Rhino. It might be coming for V5. I think I've even seen the command come up in V5 but it doesn't work yet...

Since your surfaces are planar the one thing you can do is convert them to meshes, weld the meshes, and then offset your mesh. This accomplishes the same thing as shelling, but there's no offset mesh in GH.

You can then convert your offset mesh back into NURBS try to utilize GH to create your support frame.

You could see if Guilio or @ [ U T O ] would be willing to create an offsetMesh component to add to their suites of mesh tools...

http://www.giuliopiacentino.com/weaverbird/

http://utos.blogspot.com/2010/06/new-mesh-analysis-utilities.html

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