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Author Lee, Y. T. Fang, L.
Source Journal of Mechanical Design. v. 122 no2, June 2000, p. 236-9.
Abstract The authors developed a method for the creation of non-uniform rational B-spline (NURBS) surfaces that approximate complex functional surfaces describable in closed form. NURBS, which is commonly used in CAD, can model freeform curves and surfaces as well as conic curves and quadric surfaces exactly. The approximation's accuracy can be controlled using this method. XX