Bézier curve - Wikipedia
https://en.wikipedia.org/wiki/B%C3%A9zier_curve
WebCubic Bézier curve with four control points. The basis functions on the range t in [0,1] for cubic Bézier curves: blue: y = (1 − t)3, green: y = 3 (1 − t)2t, red: y = 3 (1 − t)t2, and cyan: y = t3. A Bézier curve ( / ˈbɛz.i.eɪ / BEH-zee-ay) [1] is a parametric curve used in computer graphics and related fields. [2]
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