nurbs

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In this method, the B-spline functions or nonuniform rational B-spline functions are used to describe the problem geometry and the total solution domain can be divided into many B-spline patches which are similar to the elements in finite element method.
In the 1990s, CAD/CAM's mathematics advanced to surfaces, utilizing nonuniform rational B-spline (NURBS) technology, which provided support for significantly more complex shapes.
This application includes nonuniform rational B-spline surfacing tools, useful when a model needs additional surface editing.
Although the nonuniform rational B-spline (NURBS) can overcome the first shortcoming of B-splines to a certain extent, it fails to model transcendental curves.
The scaled-down application includes access to 2-D sketching technology, nonuniform rational B-spline curve and surface modeling tools, and photorealistic rendering tools.
Modeling tools include points, lines, edges, nonuniform rational B-spline (NURBS) curves, and cylinders.
The built-in geometry engine features a nonuniform rational b-spline (NURBS)-based construction of curves and surfaces and CAD-style model management, as well as support for standard geometric parts and filters for geometry models imported from CAD software.
1 is a nonuniform rational B-spline (NURBS) modeler that features free-form three-dimensional curve, surface, and solid modeling.
The blade is represented as a nonuniform rational B-spline (NURBS) surface, and the final output is a standard Initial Graphics Exchange Specification (IGES) file.