Hi Dears
I have a question about B-Spline or NURBS. Assume that we have a X(u)=sig(Ri,p(u)).Xi that Xi are the control points and Ri,p are the rational basis functions. When I choose a parametric variable like ui according to control point by interpolation I can find the X(ui), now the question is this that can I find the parametric variable according to having an spatial X(u)??? It means that can I find the parametric variable that have resulted a spatial X(u) that I have it???
thanks for your attention.