https://quadrone.ru/js/jquery/plugins/jquery.easing.js

1/*
2 * jQuery Easing v1.3 - http://gsgd.co.uk/sandbox/jquery/easing/
3 *
4 * Uses the built In easIng capabilities added In jQuery 1.1
5 * to offer multiple easIng options
6 *
7 * Copyright (c) 2007 George Smith
8 * Licensed under the MIT License:
9 *   http://www.opensource.org/licenses/mit-license.php
10 */
11
12// t: current time, b: begInnIng value, c: change In value, d: duration
13jQuery.easing['jswing'] = jQuery.easing['swing'];
14
15jQuery.extend( jQuery.easing,
16{
17	def: 'easeOutQuad',
18	swing: function (x, t, b, c, d) {
19		//alert(jQuery.easing.default);
20		return jQuery.easing[jQuery.easing.def](x, t, b, c, d);
21	},
22	easeInQuad: function (x, t, b, c, d) {
23		return c*(t/=d)*t + b;
24	},
25	easeOutQuad: function (x, t, b, c, d) {
26		return -c *(t/=d)*(t-2) + b;
27	},
28	easeInOutQuad: function (x, t, b, c, d) {
29		if ((t/=d/2) < 1) return c/2*t*t + b;
30		return -c/2 * ((--t)*(t-2) - 1) + b;
31	},
32	easeInCubic: function (x, t, b, c, d) {
33		return c*(t/=d)*t*t + b;
34	},
35	easeOutCubic: function (x, t, b, c, d) {
36		return c*((t=t/d-1)*t*t + 1) + b;
37	},
38	easeInOutCubic: function (x, t, b, c, d) {
39		if ((t/=d/2) < 1) return c/2*t*t*t + b;
40		return c/2*((t-=2)*t*t + 2) + b;
41	},
42	easeInQuart: function (x, t, b, c, d) {
43		return c*(t/=d)*t*t*t + b;
44	},
45	easeOutQuart: function (x, t, b, c, d) {
46		return -c * ((t=t/d-1)*t*t*t - 1) + b;
47	},
48	easeInOutQuart: function (x, t, b, c, d) {
49		if ((t/=d/2) < 1) return c/2*t*t*t*t + b;
50		return -c/2 * ((t-=2)*t*t*t - 2) + b;
51	},
52	easeInQuint: function (x, t, b, c, d) {
53		return c*(t/=d)*t*t*t*t + b;
54	},
55	easeOutQuint: function (x, t, b, c, d) {
56		return c*((t=t/d-1)*t*t*t*t + 1) + b;
57	},
58	easeInOutQuint: function (x, t, b, c, d) {
59		if ((t/=d/2) < 1) return c/2*t*t*t*t*t + b;
60		return c/2*((t-=2)*t*t*t*t + 2) + b;
61	},
62	easeInSine: function (x, t, b, c, d) {
63		return -c * Math.cos(t/d * (Math.PI/2)) + c + b;
64	},
65	easeOutSine: function (x, t, b, c, d) {
66		return c * Math.sin(t/d * (Math.PI/2)) + b;
67	},
68	easeInOutSine: function (x, t, b, c, d) {
69		return -c/2 * (Math.cos(Math.PI*t/d) - 1) + b;
70	},
71	easeInExpo: function (x, t, b, c, d) {
72		return (t==0) ? b : c * Math.pow(2, 10 * (t/d - 1)) + b;
73	},
74	easeOutExpo: function (x, t, b, c, d) {
75		return (t==d) ? b+c : c * (-Math.pow(2, -10 * t/d) + 1) + b;
76	},
77	easeInOutExpo: function (x, t, b, c, d) {
78		if (t==0) return b;
79		if (t==d) return b+c;
80		if ((t/=d/2) < 1) return c/2 * Math.pow(2, 10 * (t - 1)) + b;
81		return c/2 * (-Math.pow(2, -10 * --t) + 2) + b;
82	},
83	easeInCirc: function (x, t, b, c, d) {
84		return -c * (Math.sqrt(1 - (t/=d)*t) - 1) + b;
85	},
86	easeOutCirc: function (x, t, b, c, d) {
87		return c * Math.sqrt(1 - (t=t/d-1)*t) + b;
88	},
89	easeInOutCirc: function (x, t, b, c, d) {
90		if ((t/=d/2) < 1) return -c/2 * (Math.sqrt(1 - t*t) - 1) + b;
91		return c/2 * (Math.sqrt(1 - (t-=2)*t) + 1) + b;
92	},
93	easeInElastic: function (x, t, b, c, d) {
94		var s=1.70158;var p=0;var a=c;
95		if (t==0) return b;  if ((t/=d)==1) return b+c;  if (!p) p=d*.3;
96		if (a < Math.abs(c)) { a=c; var s=p/4; }
97		else var s = p/(2*Math.PI) * Math.asin (c/a);
98		return -(a*Math.pow(2,10*(t-=1)) * Math.sin( (t*d-s)*(2*Math.PI)/p )) + b;
99	},
100	easeOutElastic: function (x, t, b, c, d) {
101		var s=1.70158;var p=0;var a=c;
102		if (t==0) return b;  if ((t/=d)==1) return b+c;  if (!p) p=d*.3;
103		if (a < Math.abs(c)) { a=c; var s=p/4; }
104		else var s = p/(2*Math.PI) * Math.asin (c/a);
105		return a*Math.pow(2,-10*t) * Math.sin( (t*d-s)*(2*Math.PI)/p ) + c + b;
106	},
107	easeInOutElastic: function (x, t, b, c, d) {
108		var s=1.70158;var p=0;var a=c;
109		if (t==0) return b;  if ((t/=d/2)==2) return b+c;  if (!p) p=d*(.3*1.5);
110		if (a < Math.abs(c)) { a=c; var s=p/4; }
111		else var s = p/(2*Math.PI) * Math.asin (c/a);
112		if (t < 1) return -.5*(a*Math.pow(2,10*(t-=1)) * Math.sin( (t*d-s)*(2*Math.PI)/p )) + b;
113		return a*Math.pow(2,-10*(t-=1)) * Math.sin( (t*d-s)*(2*Math.PI)/p )*.5 + c + b;
114	},
115	easeInBack: function (x, t, b, c, d, s) {
116		if (s == undefined) s = 1.70158;
117		return c*(t/=d)*t*((s+1)*t - s) + b;
118	},
119	easeOutBack: function (x, t, b, c, d, s) {
120		if (s == undefined) s = 1.70158;
121		return c*((t=t/d-1)*t*((s+1)*t + s) + 1) + b;
122	},
123	easeInOutBack: function (x, t, b, c, d, s) {
124		if (s == undefined) s = 1.70158; 
125		if ((t/=d/2) < 1) return c/2*(t*t*(((s*=(1.525))+1)*t - s)) + b;
126		return c/2*((t-=2)*t*(((s*=(1.525))+1)*t + s) + 2) + b;
127	},
128	easeInBounce: function (x, t, b, c, d) {
129		return c - jQuery.easing.easeOutBounce (x, d-t, 0, c, d) + b;
130	},
131	easeOutBounce: function (x, t, b, c, d) {
132		if ((t/=d) < (1/2.75)) {
133			return c*(7.5625*t*t) + b;
134		} else if (t < (2/2.75)) {
135			return c*(7.5625*(t-=(1.5/2.75))*t + .75) + b;
136		} else if (t < (2.5/2.75)) {
137			return c*(7.5625*(t-=(2.25/2.75))*t + .9375) + b;
138		} else {
139			return c*(7.5625*(t-=(2.625/2.75))*t + .984375) + b;
140		}
141	},
142	easeInOutBounce: function (x, t, b, c, d) {
143		if (t < d/2) return jQuery.easing.easeInBounce (x, t*2, 0, c, d) * .5 + b;
144		return jQuery.easing.easeOutBounce (x, t*2-d, 0, c, d) * .5 + c*.5 + b;
145	}
146});