/**
 * Singleton that determines how an animation proceeds from start to end.
 * @class Ext.fx.Easing
 * Easing is now calculated exclusively with the use of cubic-bezier curves and follows the
 * CSS3
 * specification for 'transition-timing-function'.
 * 
Standard CSS3 Easing Values:
 * 

 * 
ease: The ease function is equivalent to cubic-bezier(0.25, 0.1, 0.25, 1.0).
 * 
linear: The linear function is equivalent to cubic-bezier(0.0, 0.0, 1.0, 1.0).
 * 
ease-in: The ease-in function is equivalent to cubic-bezier(0.42, 0, 1.0, 1.0).
 * 
ease-out: The ease-out function is equivalent to cubic-bezier(0, 0, 0.58, 1.0).
 * 
ease-in-out: The ease-in-out function is equivalent to cubic-bezier(0.42, 0, 0.58, 1.0)
 * 
cubic-bezier: Specifies a cubic-bezier curve. The four values specify points P1 and P2 of
 * the curve as (x1, y1, x2, y2). All values must be in the range [0, 1] or the definition is invalid.
 * 
 * @singleton
 */
Ext.ns('Ext.fx');

Ext.require('Ext.fx.CubicBezier', function() {
    Ext.fx.Easing = {
        ease: Ext.fx.CubicBezier.cubicBezier(0.25, 0.1, 0.25, 1),
        linear: Ext.fx.CubicBezier.cubicBezier(0, 0, 1, 1),
        'ease-in': Ext.fx.CubicBezier.cubicBezier(0.42, 0, 1, 1),
        'ease-out': Ext.fx.CubicBezier.cubicBezier(0, 0.58, 1, 1),
        'ease-in-out': Ext.fx.CubicBezier.cubicBezier(0.42, 0, 0.58, 1),
        'easeIn': Ext.fx.CubicBezier.cubicBezier(0.42, 0, 1, 1),
        'easeOut': Ext.fx.CubicBezier.cubicBezier(0, 0.58, 1, 1),
        'easeInOut': Ext.fx.CubicBezier.cubicBezier(0.42, 0, 0.58, 1)
    };
    
});