glicko-ts
Version:
A TypeScript implementation of the Glicko-1 rating system.
30 lines (29 loc) • 973 B
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.MathUtils = void 0;
class MathUtils {
/**
* Calculates the g(RD) function, which dampens the effect of the opponent's RD.
* @param rd The rating deviation of the opponent.
* @returns The dampened RD value.
*/
static g(rd, q) {
const term = 3 * Math.pow(q, 2) * Math.pow(rd, 2) / Math.pow(Math.PI, 2);
return 1 / Math.sqrt(1 + term);
}
/**
* Rounds a number to a specified number of decimal places.
* @param num The number to round.
* @param places The number of decimal places.
* @returns The rounded number.
*/
static roundToDecimalPlaces(num, places) {
if (places === 0) {
return Math.round(num);
}
const p = Math.pow(10, places);
const rounded = (Math.round(num * p) / p);
return Number(rounded.toFixed(places));
}
}
exports.MathUtils = MathUtils;