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Bézier curves

The bézier (bays-yay) curve method is one of way to define a curve. 
Different curve definitions are used and created depending on the need of
the system.  Some curves are more accurate while others calculate faster
with a given processor.  The bézier curve system uses three points to
define a curve (B-splines use four points to define a curve).  The two
exterior points control the power and angle of the curve in relation to the
center point.