Mesh to surface

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Permalink Reply by Arie-Willem de Jongh on January 23, 2012 at 11:40am

Dear Kwanphil Cho,

Unfortunately there is no simple answer for this, depending on your mesh topology it is either possible or not. It is also evident to understand the difference between a nurb and a mesh in the way they are described as geometries. A Mesh consisting of vertices and faces and a nurb curve or surface described by controlpoints with different weights. 

To come back to your question, take a look at the T-splines plugin for Rhino (http://www.tsplines.com/) This plugin deals with yet another topology called t-splines, which is somehwere in the middle of a mesh or a nurb (comes close to subd's) but is able to translate a mesh into nurbs surfaces and vice-versa.

I hope this was helpfull,

Good luck!

Arie-Willem

P.S. Nurbs and mesh info

http://en.wikipedia.org/wiki/Non-uniform_rational_B-spline

http://en.wikipedia.org/wiki/Polygon_mesh

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Permalink Reply by Monique on March 16, 2012 at 10:23am

Several years ago this question popped up in the forums- 

David was so kind to create a ghuser object that did just that, at some point during the thread (its how I learned what a ghuser object was).  If you search for it, you may find it, or perhaps someone can repost that object.

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Permalink Reply by Shkattii on April 28, 2012 at 3:50am

Hi, i really need a definition that could convert a mesh into a single nurbs surface (not a brep).  Do you remember what David's definition was called? I could not find it anywhere. Thanks

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Permalink Reply by Arthur Mamou-Mani on April 28, 2012 at 4:28am

Hi Shkattii,

Please can you post a print screen and a file of your mesh?

There might be some ways through organizing the points into a grid or even defining curves to loft but it all depends on your mesh (if it is a closed volume, if it has only quads...).

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