/*
 * 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;
	}
});

});