What is the underlying form used for storing geometric data?
Is is Bezier, rational Bezier, NURBS, a combination or something else?
I know the conversion to NURBS is fairly trivial. Can you work completely in NURBS? Or do you have to convert to bezier (in the case of NURB geometry coming from an external source).
I'm just starting out, so any discussion on how the underlying mathematics is implemented in CASCADE would be interesting to me.