redoid/lib/easing-functions.js

A Node.js package that provides an API to control your IKEA Dioder LED light strip on your Raspberry Pi.

/*!
 * redoid
 * Copyright (c) 2016 Fränz Friederes <fraenz@frieder.es>
 * MIT Licensed
 */

'use strict';

/**
 * Easing functions
 */

module.exports = {
    linear: function(t) { return t },
    easeInQuad: function(t) { return t*t },
    easeOutQuad: function(t) { return t*(2-t) },
    easeInOutQuad: function(t) { return t<.5 ? 2*t*t : -1+(4-2*t)*t },
    easeInCubic: function(t) { return t*t*t },
    easeOutCubic: function(t) { return (--t)*t*t+1 },
    easeInOutCubic: function(t) { return t<.5 ? 4*t*t*t : (t-1)*(2*t-2)*(2*t-2)+1 },
    easeInQuart: function(t) { return t*t*t*t },
    easeOutQuart: function(t) { return 1-(--t)*t*t*t },
    easeInOutQuart: function(t) { return t<.5 ? 8*t*t*t*t : 1-8*(--t)*t*t*t },
    easeInQuint: function(t) { return t*t*t*t*t },
    easeOutQuint: function(t) { return 1+(--t)*t*t*t*t },
    easeInOutQuint: function(t) { return t<.5 ? 16*t*t*t*t*t : 1+16*(--t)*t*t*t*t }
};