fork-in-the-blob

I have a blob. It likes to go through holes. It goes through one aperture. It moves up, splits, goes into two apertures, comes back together and leaves through another aperture. I want to loft one ring, then fork into two rings, then come back together at one ring, forming a continuous, single loft. Simple problem? It could easily be done with polygons by separating the faces, but I want mah NURBS!

Replies to This Discussion

Permalink Reply by Luis Fraguada on May 29, 2011 at 3:15pm

It would have to be a polysurface, a single nurbs surface cant have such topology. T-Splines was made for this sort of thing...

Permalink Reply by Steve Scott on May 29, 2011 at 3:19pm

Well, let's think of a way. I do everything with L-systems, so I need to solve this problem. Maybe Kangaroo?

Permalink Reply by Luis Fraguada on May 29, 2011 at 3:23pm

Its best done with Meshes as they do not have this topological constraint. Kangaroo is a system which does allow dynamic relaxation on meshes (among other things). This topology can be easily achieved with box modelling and then smoothing / subdivision with Weaverbird.

Permalink Reply by Tom Finnigan on June 2, 2011 at 11:46am

Could you post the skeleton of the shape you're trying to make? Just some Nurbs curves so I can get a clear idea of the basic topology..

Permalink Reply by Steve Scott on June 5, 2011 at 3:16am

Yeah, not sure how to post rhino files. Just think of it as a ring, another ring above it, then two rings, one going left and one going right. I guess the question is less grasshopper and more rhino modeling, and fixing the tangents.

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