Polygons are used in computer graphics to compose images that are three dimensional in appearance. Usually triangular, polygons arise when an object's surface is modeled, vertices are selected, and the object is rendered in a wire frame model. This is quicker to display than a shaded model; thus the polygons are a stage in computer animation.NURBS (Non Uniform Rational Basis Spline)
is a mathematical model commonly used in computer graphics for generating and representing curves and surfaces which offers great flexibility and precision for freeform shapes.
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