NURBS

Non-Uniform Rational Basis Spline (NURBS) is an accurate mathematical representation of curves and surfaces. The shape of the surface is defined by a number of control points and the degree of that surface in each one of the two directions (u- and v-directions).

NURBS surfaces can be trimmed or untrimmed.

NURBS Primitives

NURBS Primitives are very similar to polygonal primitives, but they generates internal representation in NURBS forms, instead of polygons. This primitive may be converted tu NURBS with help of Rasterize Procedural Object command.

Ellipse	Ellipse curve
Arc	Arc curve
Cube	NURBS Cube Primitive
Sphere	NURBS Sphere Primitive
Plane	NURBS Plane Primitive
Cylinder	NURBS Cylinder Primitive
Cone	NURBS Cone Primitive
Torus	NURBS Torus Primitive
Disk	NURBS Disk Primitive
Tube	NURBS Tube Primitive

NURBS Objects

BRep	BRep - boudning reprsentation
Surface	NURBS Surface
Curve	NURBS Curve