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vini-btc/easing.js

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Created January 5, 2016 13:05
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  1. @invalid-email-address Anonymous created this gist Jan 20, 2012.
    32 changes: 32 additions & 0 deletions easing.js
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    Original file line number Diff line number Diff line change
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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 }
    }