phaser
Version:
A fast, free and fun HTML5 Game Framework for Desktop and Mobile web browsers from the team at Phaser Studio Inc.
34 lines (31 loc) • 1.01 kB
JavaScript
/**
* @author Richard Davey <rich@phaser.io>
* @copyright 2013-2026 Phaser Studio Inc.
* @license {@link https://opensource.org/licenses/MIT|MIT License}
*/
/**
* Applies a Quintic ease-in/out function to the given value. The motion begins slowly,
* accelerates sharply through the midpoint, then decelerates back to a slow stop. The
* quintic curve (raised to the 5th power) produces a more dramatic acceleration and
* deceleration compared to cubic or quartic easings, making it well suited for animations
* that require a strong, punchy feel with smooth start and end transitions.
*
* @function Phaser.Math.Easing.Quintic.InOut
* @since 3.0.0
*
* @param {number} v - The value to be eased, in the range [0, 1].
*
* @return {number} The eased value, in the range [0, 1].
*/
var InOut = function (v)
{
if ((v *= 2) < 1)
{
return 0.5 * v * v * v * v * v;
}
else
{
return 0.5 * ((v -= 2) * v * v * v * v + 2);
}
};
module.exports = InOut;