[Bf-funboard] Weighted sub surfs

[David Cuny]

Nathan Allworth wrote:

> This smoothing that takes place has to have a number associated 
> with it, a number of how much smoothing should take place on 
> that area of the mesh, or that mesh. 

No, not really. The number refers to how many times the operation is 
performed. So if you smooth mesh M0, you get a new mesh, M1:

   M0 --> M1

To get a smoother version of M1, you can perform the same operation on M1 to 
get M2:

   M1 --> M2

each time you perform the operation, you get a smoother version of the mesh, 
but you also get a new mesh (the intermediate meshes are discarded).

Here's a link that should explain it (lots of pictures, no math):

   http://www.eas.asu.edu/~cse470/resources/subdivision/

-- David Cuny