Dear BaRA:
There are two modes when you draw NURBS curve: the first one is "NURBS curve by interpolation points" and the second one is "NURBS curve by control points". We calculate the control points internally if you choose the first mode, the number of control points will be bigger than the number of interpolation points. Try the following again, the only difference is that you draw NURBS curve by the second mode, you will get the result as you expect:
(1) draw a curve with the NURBS curve tool (the second mode). Makes sure it's not a flat curve.
(2) duplicate it 2 times. By duplicating, you can be sure they have the same parametrization.
(3) connect it with the loft tool.
(4) the results is a surface with the same CV's as you started out with.
>If I do the same thing in Rhino, Maya or >StudioTools, I have no change in the amount of >CV's. I know Maya and StudioTools have a >different kernel than VW, but if I am not >mistaken, Rhino uses SMlib.
>So assuming Rhino uses the same NURBS-kernel as >VW, why does it happen in VW?
I guess that you draw Rhino's curve by their first mode which is control points mode, but if you draw it by the second mode, you will get more control points than interpolation points. Let me know if you still have questions.
Regards,
Charlene
