Grasshopper

algorithmic modeling for Rhino

Metaballs created with 2D slices and the MeshFromPoints command.

Rendered in Brazil.

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Comment by asaf yaacobi on June 10, 2012 at 5:09am

thnx for explaining., 

asaf :)

Comment by David Rutten on June 10, 2012 at 5:02am

Hi Asaf, Metaballs cannot be represented by a single Nurbs surface. Or rather, it is not a guarantee that they can. Metaballs can have any topology genus, whereas individual nurbs surfaces (ignoring trimming curves at the moment) can only have genus=0 and genus=1 topology.

It is possible to represent a Metaball using a collection of nurbs patches, but Rhino has no algorithms for creating these patches. There are however reverse engineering plugins that do this, but I don't know enough about them to recommend one.

Comment by asaf yaacobi on June 10, 2012 at 4:10am

david.

i have managed to pull it through with the metaball component. i get amazing 3d shapes but what im trying to get is a nurb surface. how can i convert it, or work from the beginning to create a nurb?  the reason is that that i want to keep editing it in rhino after getting the final metaball form

thnx 

asaf

Comment by Jitendra V. Patel on July 25, 2011 at 5:03am
excelent work
Comment by Michael Pryor on July 24, 2011 at 6:56pm
For some reason there is no reply to comment button. So David to your most recent comment. How do you deal then with intersections? Do you remove duplicate curves. I guess I'm saying is how do you clean up those crazy areas where points are inside the overall desired "shell of points". If that make sense.
Comment by David Rutten on July 24, 2011 at 6:24pm

Hi Mike,

 

you have to generate a lot of points and they have to be fairly equally distributed. I obtain the best results when creating 2D metaball slices in 3 different directions, then harvest the points from all of those section curves.

Comment by Michael Pryor on July 23, 2011 at 8:51pm
Is it possible to get a tutorial?
Comment by Michael Pryor on July 23, 2011 at 8:48pm
how do u get mesh from points so perfect. mines always broken :(
Comment by David Rutten on July 23, 2011 at 4:33am
the "righteous way" would involve a 3D marching-curve or marching-tetrahedron algorithm.
Comment by Behnood Eghbali on July 23, 2011 at 4:21am
so cute and gorgeous ;) i love them <3

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