/**
 * @author       Richard Davey <rich@photonstorm.com>
 * @copyright    2018 Photon Storm Ltd.
 * @license      {@link https://github.com/photonstorm/phaser/blob/master/license.txt|MIT License}
 */
declare var SmootherStep: (items: any, property: any, min: any, max: any, inc: any) => any;
/**
 * A Smoother Step interpolation method.
 *
 * @function Phaser.Math.Interpolation.SmootherStep
 * @since 3.9.0
 * @see {@link https://en.wikipedia.org/wiki/Smoothstep#Variations}
 *
 * @param {number} t - The percentage of interpolation, between 0 and 1.
 * @param {number} min - The minimum value, also known as the 'left edge', assumed smaller than the 'right edge'.
 * @param {number} max - The maximum value, also known as the 'right edge', assumed greater than the 'left edge'.
 *
 * @return {number} The interpolated value.
 */
declare var SmootherStepInterpolation: (t: any, min: any, max: any) => any;