NURBS surfaces are based on splines and are mainly used for free-form surfaces such as those used in the automotive industry. There are two processes for creating NURBS surfaces and several commands to edit them, which are presented next.
We can create NURBS surfaces by previously specifying a value
1 for the
SURFACEMODELINGMODE system variable and applying surface creation commands, or by converting existing objects with the
When creating surfaces, the
SURFACEMODELINGMODE variable controls if NURBS or procedural surfaces are created:
0: With this value, a procedural surface is created when creating surfaces.
1: With this value, a NURBS surface is created when ...