Rational refers to the underlying mathematical representation. This property allows NURBS to represent exact conics (such as parabolic curves, circles, and ellipses) in addition to free-form curves.
Rational refers to the underlying mathematical representation. This property allows NURBS to represent exact conics (such as parabolic curves, circles, and ellipses) in addition to free-form curves.
非均匀指曲线的参数化法。非均匀曲线允许（其它东西之一(我也没看懂)）多重结点的存在，这是模拟贝赛曲线所必需的。