[Fluxus] nurbs problems

[Dave Griffiths]

On Thu, 2008-07-17 at 17:17 +0200, gabor papp wrote:
> > This is partially to do with the fact that you need to add extra control
> > vertices to maintain continuity across the surface of the sphere, this
> > could be hidden from the pdata interface, but I think it's better not to.
> this behaviour was not clear for me from the documentation. i think the 
> nurbs topology section suggests that a 5x5 sphere has 25 points, which 
> are coincident at the edges.
> 
> > MakeNURBSSphere() and MakeNURBSPlane(). The offsets in the for loops
> > generating the knot vectors look a bit strange to me.
> thanks. i look into this then.

I had a quick look at this - I can't see anywhere in the underlying glu
tesselator where you can specify different values for u and v direction,
so I'm wondering if it's not actually possible with our current
tesselator? I could well be wrong tho...

cheers,

dave