https://www.onbacon.com/js/jquery.easing-1.3.js

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