all files / ol/ easing.js

76.92% Statements 10/13
0% Branches 0/2
80% Functions 4/5
76.92% Lines 10/13
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63                 57×                   57×                   147×                   46×                                    
goog.provide('ol.easing');
 
 
/**
 * Start slow and speed up.
 * @param {number} t Input between 0 and 1.
 * @return {number} Output between 0 and 1.
 * @api
 */
ol.easing.easeIn = function(t) {
  return Math.pow(t, 3);
};
 
 
/**
 * Start fast and slow down.
 * @param {number} t Input between 0 and 1.
 * @return {number} Output between 0 and 1.
 * @api
 */
ol.easing.easeOut = function(t) {
  return 1 - ol.easing.easeIn(1 - t);
};
 
 
/**
 * Start slow, speed up, and then slow down again.
 * @param {number} t Input between 0 and 1.
 * @return {number} Output between 0 and 1.
 * @api
 */
ol.easing.inAndOut = function(t) {
  return 3 * t * t - 2 * t * t * t;
};
 
 
/**
 * Maintain a constant speed over time.
 * @param {number} t Input between 0 and 1.
 * @return {number} Output between 0 and 1.
 * @api
 */
ol.easing.linear = function(t) {
  return t;
};
 
 
/**
 * Start slow, speed up, and at the very end slow down again.  This has the
 * same general behavior as {@link ol.easing.inAndOut}, but the final slowdown
 * is delayed.
 * @param {number} t Input between 0 and 1.
 * @return {number} Output between 0 and 1.
 * @api
 */
ol.easing.upAndDown = function(t) {
  if (t < 0.5) {
    return ol.easing.inAndOut(2 * t);
  } else {
    return 1 - ol.easing.inAndOut(2 * (t - 0.5));
  }
};