Simplified Penner easing functions.
Each function only takes a position argument:
View Robert Prenner's original code:
swingFromTo swingFrom swingTo easeFromTo easeFrom easeTo easeInQuad easeOutQuad easeInOutQuad easeInCubic easeOutCubic easeInOutCubic easeInQuart easeOutQuart easeInOutQuart easeInQuint easeOutQuint easeInOutQuint easeInSine easeOutSine easeInOutSine easeInExpo easeOutExpo easeInOutExpo easeInCirc easeOutCirc easeInOutCirc easeOutBounce easeInBack easeOutBack easeInOutBack bounce bouncePast elastic
This code may be freely distributed under the MIT license.