Hello,
So far no one has answered this question on nurbs:
If I use GL_MAP1_VERTEX4 for the type in the function gluNurbsCurve() it should allow you to draw rational b spline curves by specifying the homogenious weighting factors in the fourth coordinate of the each control point. Unfortunately all this does is gives you a distorted curve for homogenious weighting factors different from 1.0. Could I be doing something wrong?
Sky-raven