Grasshopper

algorithmic modeling for Rhino

Catmull Clark

Is the Catmull Clark formula somehow altered compared to the original  ?

comparing :

http://www.algosome.com/articles/catmull-clark-subdivision-algorith...

http://en.wikipedia.org/wiki/Catmull%E2%80%93Clark_subdivision_surface

and here is the image I got the weights properly, but it seems that weights equation for the original vertex is more like :

(F+2R+(3/n)P)/n

F=face center's average

R = edge center's average

P = original point

n = number of faces at P

using wikipedia notation.

Views: 1295

Replies to This Discussion

Permalink Reply by Giulio Piacentino on January 9, 2015 at 6:43am

Hi Mateusz

>>Is the Catmull Clark formula somehow altered compared to the original  ?

No Weaverbird uses the original C-C formula. Back then I also checked the results with a couple of other programs.

Giulio
--
Giulio Piacentino
Weaverbird development
mail@giuliopiacentino.com

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