rg-stats/js/util/math.js

A library for calculating various rhythm game stats.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.RoundToNDP = exports.LogToBase = void 0;
/**
 * Logarithm a number to any base.
 * @param number - The number to logarithm.
 * @param base - The base to log to.
 *
 * Uses this identity:
 * loga(n) = logb(n) / logb(a)
 * we use logb = ln, just because it's right there.
 */
function LogToBase(number, base) {
    return Math.log(number) / Math.log(base);
}
exports.LogToBase = LogToBase;
/**
 * Round a number to N decimal places.
 *
 * @example `RoundToNDP(1.594, 1) -> 1.6`
 * @example `RoundToNDP(1.591, 2) -> 1.69`
 *
 * @param number - The number to round.
 * @param dp - The amount of decimal places to round to.
 */
function RoundToNDP(number, dp) {
    const mul = 10 ** dp;
    return Math.round(number * mul) / mul;
}
exports.RoundToNDP = RoundToNDP;
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