Method levelFromExp

app/models/User.js:386–388

(xp)

    // y = a * ln(1/b * (x + c)) + 1
    static levelFromExp (xp) {
      if (xp > 0) { return Math.floor(a * Math.log((1 / b) * (xp + c))) + 1 } else { return 1 }
    }

    // x = b * e^((y-1)/a) - c
    static expForLevel (level) {