bludit/bl-themes/scrolling-nav/vendor/jquery-easing/jquery.easing.js

167 lines
4.0 KiB
JavaScript
Executable File

/*
* jQuery Easing v1.4.1 - http://gsgd.co.uk/sandbox/jquery/easing/
* Open source under the BSD License.
* Copyright © 2008 George McGinley Smith
* All rights reserved.
* https://raw.github.com/gdsmith/jquery-easing/master/LICENSE
*/
(function (factory) {
if (typeof define === "function" && define.amd) {
define(['jquery'], function ($) {
return factory($);
});
} else if (typeof module === "object" && typeof module.exports === "object") {
exports = factory(require('jquery'));
} else {
factory(jQuery);
}
})(function($){
// Preserve the original jQuery "swing" easing as "jswing"
$.easing.jswing = $.easing.swing;
var pow = Math.pow,
sqrt = Math.sqrt,
sin = Math.sin,
cos = Math.cos,
PI = Math.PI,
c1 = 1.70158,
c2 = c1 * 1.525,
c3 = c1 + 1,
c4 = ( 2 * PI ) / 3,
c5 = ( 2 * PI ) / 4.5;
// x is the fraction of animation progress, in the range 0..1
function bounceOut(x) {
var n1 = 7.5625,
d1 = 2.75;
if ( x < 1/d1 ) {
return n1*x*x;
} else if ( x < 2/d1 ) {
return n1*(x-=(1.5/d1))*x + 0.75;
} else if ( x < 2.5/d1 ) {
return n1*(x-=(2.25/d1))*x + 0.9375;
} else {
return n1*(x-=(2.625/d1))*x + 0.984375;
}
}
$.extend( $.easing,
{
def: 'easeOutQuad',
swing: function (x) {
return $.easing[$.easing.def](x);
},
easeInQuad: function (x) {
return x * x;
},
easeOutQuad: function (x) {
return 1 - ( 1 - x ) * ( 1 - x );
},
easeInOutQuad: function (x) {
return x < 0.5 ?
2 * x * x :
1 - pow( -2 * x + 2, 2 ) / 2;
},
easeInCubic: function (x) {
return x * x * x;
},
easeOutCubic: function (x) {
return 1 - pow( 1 - x, 3 );
},
easeInOutCubic: function (x) {
return x < 0.5 ?
4 * x * x * x :
1 - pow( -2 * x + 2, 3 ) / 2;
},
easeInQuart: function (x) {
return x * x * x * x;
},
easeOutQuart: function (x) {
return 1 - pow( 1 - x, 4 );
},
easeInOutQuart: function (x) {
return x < 0.5 ?
8 * x * x * x * x :
1 - pow( -2 * x + 2, 4 ) / 2;
},
easeInQuint: function (x) {
return x * x * x * x * x;
},
easeOutQuint: function (x) {
return 1 - pow( 1 - x, 5 );
},
easeInOutQuint: function (x) {
return x < 0.5 ?
16 * x * x * x * x * x :
1 - pow( -2 * x + 2, 5 ) / 2;
},
easeInSine: function (x) {
return 1 - cos( x * PI/2 );
},
easeOutSine: function (x) {
return sin( x * PI/2 );
},
easeInOutSine: function (x) {
return -( cos( PI * x ) - 1 ) / 2;
},
easeInExpo: function (x) {
return x === 0 ? 0 : pow( 2, 10 * x - 10 );
},
easeOutExpo: function (x) {
return x === 1 ? 1 : 1 - pow( 2, -10 * x );
},
easeInOutExpo: function (x) {
return x === 0 ? 0 : x === 1 ? 1 : x < 0.5 ?
pow( 2, 20 * x - 10 ) / 2 :
( 2 - pow( 2, -20 * x + 10 ) ) / 2;
},
easeInCirc: function (x) {
return 1 - sqrt( 1 - pow( x, 2 ) );
},
easeOutCirc: function (x) {
return sqrt( 1 - pow( x - 1, 2 ) );
},
easeInOutCirc: function (x) {
return x < 0.5 ?
( 1 - sqrt( 1 - pow( 2 * x, 2 ) ) ) / 2 :
( sqrt( 1 - pow( -2 * x + 2, 2 ) ) + 1 ) / 2;
},
easeInElastic: function (x) {
return x === 0 ? 0 : x === 1 ? 1 :
-pow( 2, 10 * x - 10 ) * sin( ( x * 10 - 10.75 ) * c4 );
},
easeOutElastic: function (x) {
return x === 0 ? 0 : x === 1 ? 1 :
pow( 2, -10 * x ) * sin( ( x * 10 - 0.75 ) * c4 ) + 1;
},
easeInOutElastic: function (x) {
return x === 0 ? 0 : x === 1 ? 1 : x < 0.5 ?
-( pow( 2, 20 * x - 10 ) * sin( ( 20 * x - 11.125 ) * c5 )) / 2 :
pow( 2, -20 * x + 10 ) * sin( ( 20 * x - 11.125 ) * c5 ) / 2 + 1;
},
easeInBack: function (x) {
return c3 * x * x * x - c1 * x * x;
},
easeOutBack: function (x) {
return 1 + c3 * pow( x - 1, 3 ) + c1 * pow( x - 1, 2 );
},
easeInOutBack: function (x) {
return x < 0.5 ?
( pow( 2 * x, 2 ) * ( ( c2 + 1 ) * 2 * x - c2 ) ) / 2 :
( pow( 2 * x - 2, 2 ) *( ( c2 + 1 ) * ( x * 2 - 2 ) + c2 ) + 2 ) / 2;
},
easeInBounce: function (x) {
return 1 - bounceOut( 1 - x );
},
easeOutBounce: bounceOut,
easeInOutBounce: function (x) {
return x < 0.5 ?
( 1 - bounceOut( 1 - 2 * x ) ) / 2 :
( 1 + bounceOut( 2 * x - 1 ) ) / 2;
}
});
});