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Simple Easing Functions in Javascript - see http://greweb.me/2012/02/bezier-curve-based-easing-functions-from-concept-to-implementation/
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/* | |
* Easing Functions - inspired from http://gizma.com/easing/ | |
* only considering the t value for the range [0, 1] => [0, 1] | |
*/ | |
EasingFunctions = { | |
// no easing, no acceleration | |
linear: function (t) { return t }, | |
// accelerating from zero velocity | |
easeInQuad: function (t) { return t*t }, | |
// decelerating to zero velocity | |
easeOutQuad: function (t) { return t*(2-t) }, | |
// acceleration until halfway, then deceleration | |
easeInOutQuad: function (t) { return t<.5 ? 2*t*t : -1+(4-2*t)*t }, | |
// accelerating from zero velocity | |
easeInCubic: function (t) { return t*t*t }, | |
// decelerating to zero velocity | |
easeOutCubic: function (t) { return (--t)*t*t+1 }, | |
// acceleration until halfway, then deceleration | |
easeInOutCubic: function (t) { return t<.5 ? 4*t*t*t : (t-1)*(2*t-2)*(2*t-2)+1 }, | |
// accelerating from zero velocity | |
easeInQuart: function (t) { return t*t*t*t }, | |
// decelerating to zero velocity | |
easeOutQuart: function (t) { return 1-(--t)*t*t*t }, | |
// acceleration until halfway, then deceleration | |
easeInOutQuart: function (t) { return t<.5 ? 8*t*t*t*t : 1-8*(--t)*t*t*t }, | |
// accelerating from zero velocity | |
easeInQuint: function (t) { return t*t*t*t*t }, | |
// decelerating to zero velocity | |
easeOutQuint: function (t) { return 1+(--t)*t*t*t*t }, | |
// acceleration until halfway, then deceleration | |
easeInOutQuint: function (t) { return t<.5 ? 16*t*t*t*t*t : 1+16*(--t)*t*t*t*t } | |
} |
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