Grasshopper

algorithmic modeling for Rhino

How to build a spiky ball?

My project is to build a spiky ball, like a planet with sharp mountains.

On the right of the attached image, it is the "landscape" created by Kangaroo. But when I flow it onto the sphere, it deforms a lot and becomes blobby. See the result on the left.

 

I am wondering how to create a nice form-finding-ish geometry on a sphere same or close to on a planar surface? 

Many thanks!!

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Permalink Reply by David Rutten on December 20, 2014 at 4:32am
It's not a good idea to use a single nurbs surface to create creases or cusps. Nurbs surfaces like to be smooth. Would you be ok with a mesh approach?
Permalink Reply by xiao-g on December 20, 2014 at 7:34am

Thanks David. 

Sure it is fine to use mesh. Actually the "landscape" was a mesh generated by the Kangaroo. Then I tried to use the same Kangaroo method on a mesh sphere but failed.  

Attached are the files I used. Much appreciated if any suggestion. 

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