What are NURBS?

As mentioned before, solidThinking are based on NURBS curves in making a surface and solids. The Question is, what are NURBS? NURBS means Non-Uniform, Rational, Basis Splines.NURBS is a mathematical model commonly used in computer graphics for
generating and representing curves and surfaces which offers great flexibility and precision for handling both analytic and freeform shapes.NURBS geometry a actually a mathematical expressions of curves in a virtual, 3D space. It is based on these algorithms which are extremely fast and stable- so you can represent any desired shape.Their shapes are controlled by points in space called Control Vertices or “CVs” (Points).