The Title is bit misleading. Is s plea for the implementation of this paper http://www.cl.cam.ac.uk/research/rainbow/projects/subdnurbs/nurbswep.html

BUT nevertheless is more than interesting to see companies like KISKA and TATA Motors not been shy to talk about the use of blender into their studios. The message to companies like Autodesk, The Foundry etc. Should be LOUD AND CLEAR.




TATA Motors TMETC Presentation

Hi Pilou & adamio - I think there is some further misunderstanding with the paper referenced.

The technical report https://www.cl.cam.ac.uk/techreports/UCAM-CL-TR-773.pdf is titled "NURBS-compatible subdivision surfaces". However, it's not about exporting polygon models to NURBS, it's basically the reverse of that.

It's about a different type of subdivision surface (not the typical "Catmull-Clark" method) that uses the NURBS concepts of degree and non-uniform knot vectors as part of the polygon structure and subdivision rules, making it a superset of NURBS. It basically means the subdivision model can load an untrimmed NURBS surface into it exactly. But once you introduce an extraordinary vertex you'll be outside the subset of NURBS and the model isn't exactly convertible back to NURBS anymore, it would require some kind of refitting process briefly suggested in just one paragraph.

- Michael

I was deceived by the screen at minute 19.00! :)

Michael you are correct, What is also confusing to me is why would they want the conversion to Nurbs to happen inside Blender. Alias comes with SpeedForm a Fusion 360 (T-Splines) clone that doesn’t have the cloud infrastructure.



Anyway considering the paper been discussed here, the some group of people have publish some additional reasearch papers on the subject. http://neildodgson.com/pubs/

Converting a CAD model into a non-uniform subdivision surface. NOW that would be a dream come true feature to have inside MoI :)



ps. I should take the opportunity to say that Malcolm Sabin is a real legend. http://solidmodeling.org/awards/bezier-award/malcolm-sabin/

And the French Pierre Bézier the first legend of 2D 3D! ;)
https://en.wikipedia.org/wiki/UNISURF cad System