phaser
Version:
A fast, free and fun HTML5 Game Framework for Desktop and Mobile web browsers from the team at Phaser Studio Inc.
59 lines (53 loc) • 1.06 kB
JavaScript
/**
* @author Richard Davey <rich@phaser.io>
* @copyright 2013-2025 Phaser Studio Inc.
* @license {@link https://opensource.org/licenses/MIT|MIT License}
*/
/**
* Bounce ease-in/out.
*
* @function Phaser.Math.Easing.Bounce.InOut
* @since 3.0.0
*
* @param {number} v - The value to be tweened.
*
* @return {number} The tweened value.
*/
var InOut = function (v)
{
var reverse = false;
if (v < 0.5)
{
v = 1 - (v * 2);
reverse = true;
}
else
{
v = (v * 2) - 1;
}
if (v < 1 / 2.75)
{
v = 7.5625 * v * v;
}
else if (v < 2 / 2.75)
{
v = 7.5625 * (v -= 1.5 / 2.75) * v + 0.75;
}
else if (v < 2.5 / 2.75)
{
v = 7.5625 * (v -= 2.25 / 2.75) * v + 0.9375;
}
else
{
v = 7.5625 * (v -= 2.625 / 2.75) * v + 0.984375;
}
if (reverse)
{
return (1 - v) * 0.5;
}
else
{
return v * 0.5 + 0.5;
}
};
module.exports = InOut;