An n-th degree polynomial interpolator. Used as an alternative for common `lerp` functions

nerp.js

/**
 * N-th degree polynomial interpolation
 * @param {Number} degree
 * @param {Number} min
 * @param {Number} max
 * @param {Number} amount
 * @returns {Number}
 */
function nerp(degree, min, max, amount) {
	return min + Math.pow(amount, degree) * (max - min);
}

You can use it as follows:

var QUADRATIC = 2;
var CUBIC = 3;

nerp(QUADRATIC, 0, 1, 0.5) // returns 0.25
nerp(CUBIC, 0, 1, 0.5) // returns 0.125