Bézier Curves

TL;DRAbstract

A spline curve is a smooth curve specified succinctly in terms of a few points. These two aspects of splines, that they are smooth and that they are specified succinctly in terms of only a few points, are both important. First, the ability to specify a curve with only a few points reduces storage requirements. In addition, it facilitates the computer-aided design of curves and surfaces because the designer or artist can control an entire curve by varying only a few points. Second, the commonly used methods for generating splines give curves with good smoothness properties and without undesired oscillations. Furthermore, these splines also allow for isolated points where the curve is not smooth, such as points where the spline has a “corner.” A third important property of splines is that there are simple algorithms for finding points on the spline curve or surface and simple criteria for deciding how finely a spline must be approximated by linear segments to obtain a sufficiently faithf

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