Easing Equations by Robert Penner

Used in Qt Core (QEasingCurve).

The sources can be found in qt5/qtbase/src/3rdparty/easing/easing.cpp.

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 Copyright (c) 2001 Robert Penner

BSD 3-clause "New" or "Revised" License.

 Copyright (c) 2001 Robert Penner
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