Kochanek–Bartels spline

In mathematics, a Kochanek–Bartels spline or Kochanek–Bartels curve is a cubic Hermite spline with tension, bias, and continuity parameters defined to change the behavior of the tangents. It was invented by Doris Kochanek of National Film Board of Canada and Richard Bartels of University of Waterloo in Canada to automate the process of creating the effect desired by the animator for interpolated motion between key frames in computer animation, reducing the need to input additional information.

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