Geodesic
Development and Implementation of NURBS Models of Quadratic Curves and Surfaces
Serdica Journal of Computing, Tome 3 (2009) no. 4, pp. 425-448.

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This article goes into the development of NURBS models of quadratic curves and surfaces. Curves and surfaces which could be represented by one general equation (one for the curves and one for the surfaces) are addressed. The research examines the curves: ellipse, parabola and hyperbola, the surfaces: ellipsoid, paraboloid, hyperboloid, double hyperboloid, hyperbolic paraboloid and cone, and the cylinders: elliptic, parabolic and hyperbolic. Many real objects which have to be modeled in 3D applications possess specific features. Because of this these geometric objects have been chosen. Using the NURBS models presented here, specialized software modules (plug-ins) have been developed for a 3D graphic system. An analysis of their implementation and the primitives they create has been performed.
Keywords: Computer Graphics, Geometric Modeling, 3D Graphic Systems, Curves, Surfaces, NURBS 
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     title = {Development and {Implementation} of {NURBS} {Models} of {Quadratic} {Curves} and {Surfaces}},
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G. Petkov, Emiliyan. Development and Implementation of NURBS Models of Quadratic Curves and Surfaces. Serdica Journal of Computing, Tome 3 (2009) no. 4, pp. 425-448. http://geodesic.mathdoc.fr/item/SJC_2009_3_4_a4/