2 * jQuery Easing v1.1.1 - http://gsgd.co.uk/sandbox/jquery.easing.php
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4 * Uses the built in easing capabilities added in jQuery 1.1
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5 * to offer multiple easing options
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7 * Copyright (c) 2007 George Smith
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8 * Licensed under the MIT License:
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9 * http://www.opensource.org/licenses/mit-license.php
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12 jQuery.extend(jQuery.easing, {
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13 easein: function(x, t, b, c, d) {
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14 return c*(t/=d)*t + b; // in
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16 easeinout: function(x, t, b, c, d) {
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17 if (t < d/2) return 2*c*t*t/(d*d) + b;
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19 return -2*c*ts*ts/(d*d) + 2*c*ts/d + c/2 + b;
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21 easeout: function(x, t, b, c, d) {
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22 return -c*t*t/(d*d) + 2*c*t/d + b;
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24 expoin: function(x, t, b, c, d) {
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30 return flip * (Math.exp(Math.log(c)/d * t)) + b;
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32 expoout: function(x, t, b, c, d) {
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38 return flip * (-Math.exp(-Math.log(c)/d * (t-d)) + c + 1) + b;
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40 expoinout: function(x, t, b, c, d) {
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46 if (t < d/2) return flip * (Math.exp(Math.log(c/2)/(d/2) * t)) + b;
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47 return flip * (-Math.exp(-2*Math.log(c/2)/d * (t-d)) + c + 1) + b;
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49 bouncein: function(x, t, b, c, d) {
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50 return c - jQuery.easing['bounceout'](x, d-t, 0, c, d) + b;
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52 bounceout: function(x, t, b, c, d) {
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53 if ((t/=d) < (1/2.75)) {
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54 return c*(7.5625*t*t) + b;
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55 } else if (t < (2/2.75)) {
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56 return c*(7.5625*(t-=(1.5/2.75))*t + .75) + b;
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57 } else if (t < (2.5/2.75)) {
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58 return c*(7.5625*(t-=(2.25/2.75))*t + .9375) + b;
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60 return c*(7.5625*(t-=(2.625/2.75))*t + .984375) + b;
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63 bounceinout: function(x, t, b, c, d) {
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64 if (t < d/2) return jQuery.easing['bouncein'] (x, t*2, 0, c, d) * .5 + b;
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65 return jQuery.easing['bounceout'] (x, t*2-d,0, c, d) * .5 + c*.5 + b;
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67 elasin: function(x, t, b, c, d) {
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68 var s=1.70158;var p=0;var a=c;
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69 if (t==0) return b; if ((t/=d)==1) return b+c; if (!p) p=d*.3;
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70 if (a < Math.abs(c)) { a=c; var s=p/4; }
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71 else var s = p/(2*Math.PI) * Math.asin (c/a);
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72 return -(a*Math.pow(2,10*(t-=1)) * Math.sin( (t*d-s)*(2*Math.PI)/p )) + b;
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74 elasout: function(x, t, b, c, d) {
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75 var s=1.70158;var p=0;var a=c;
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76 if (t==0) return b; if ((t/=d)==1) return b+c; if (!p) p=d*.3;
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77 if (a < Math.abs(c)) { a=c; var s=p/4; }
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78 else var s = p/(2*Math.PI) * Math.asin (c/a);
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79 return a*Math.pow(2,-10*t) * Math.sin( (t*d-s)*(2*Math.PI)/p ) + c + b;
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81 elasinout: function(x, t, b, c, d) {
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82 var s=1.70158;var p=0;var a=c;
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83 if (t==0) return b; if ((t/=d/2)==2) return b+c; if (!p) p=d*(.3*1.5);
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84 if (a < Math.abs(c)) { a=c; var s=p/4; }
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85 else var s = p/(2*Math.PI) * Math.asin (c/a);
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86 if (t < 1) return -.5*(a*Math.pow(2,10*(t-=1)) * Math.sin( (t*d-s)*(2*Math.PI)/p )) + b;
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87 return a*Math.pow(2,-10*(t-=1)) * Math.sin( (t*d-s)*(2*Math.PI)/p )*.5 + c + b;
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89 backin: function(x, t, b, c, d) {
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91 return c*(t/=d)*t*((s+1)*t - s) + b;
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93 backout: function(x, t, b, c, d) {
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95 return c*((t=t/d-1)*t*((s+1)*t + s) + 1) + b;
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97 backinout: function(x, t, b, c, d) {
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99 if ((t/=d/2) < 1) return c/2*(t*t*(((s*=(1.525))+1)*t - s)) + b;
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100 return c/2*((t-=2)*t*(((s*=(1.525))+1)*t + s) + 2) + b;
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