afonsoalban
6/29/2016 - 2:49 PM

## Easing functions.

Easing functions.

``````/**
* Easing Functions - Inspired from http://gizma.com/easing/,
* only considering the t value for the range [0, 1] => [0, 1].
* @type {Object}
*/
var Easing = {
// No easing, no acceleration.
linear: function(t) {
return t;
},
// Accelerating from zero velocity.
return t * t;
},
// Decelerating to zero velocity.
return t * (2 - t);
},
// Acceleration until halfway, then deceleration.
return t < 0.5 ? 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 < 0.5 ? 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 < 0.5 ? 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 < 0.5 ? 16 * t * t * t * t * t : 1 + 16 * (--t) * t * t * t * t;
}
};
``````