https://www.swtor.com/sites/all/themes/coruscant/js/jquery.bezier.js

1/*! Bezier Easing ~ Sean Catchpole - Copyright 2010 MIT/GPL */
2(function($){ if(!$){ return }
3
4  var midpoint = function(t,a,b){
5    return { x: t*(b.x-a.x) + a.x
6           , y: t*(b.y-a.y) + a.y }
7  };
8
9  var bezier = function(t,p){
10    p=p.slice();
11    p.unshift({x:0,y:0});
12    p.push({x:1,y:1});
13    var i, n=p.length;
14    while( n-->1 ){
15      for( i=0; i<n; i++ ){
16        p[i] = midpoint( t, p[i], p[i+1] );
17      }
18    }
19    return p[0];
20  };
21
22  $.bezier = function(){
23    var args = [].slice.call(arguments)
24      , list=[], p, last=0, N=$.bezier.samples, i=N;
25    while( i-- ){
26      p = bezier(i/N,args);
27      list[Math.round(p.x*N)] = p.y;
28    }
29    for( i=0; i<=N; i++ ){
30      if( list[i]==null ){ list[i]=last; }
31      else{ last=list[i]; }
32    }
33    return function(t,n,a,b){
34      n = Math.floor(t*N);
35      n = list[n]+(list[n+1]-list[n])*(t*N-n);
36      return n*(b-a) + a;
37    };
38  };
39  $.bezier.samples = 100;
40
41  $.easing["ease"] = $.bezier( {x:0.25,y:0.1}, {x:0.25,y:1} );
42  $.easing["ease-in"] = $.bezier( {x:0.42,y:0}, {x:1,y:1} );
43  $.easing["ease-out"] = $.bezier( {x:0,y:0}, {x:0.58,y:1} );
44  $.easing["ease-in-out"] = $.bezier( {x:0.42,y:0}, {x:0.58,y:1} );
45
46})(jQuery);