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MISC: clamping numbers (#1104)
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import { clampNumber } from "../../utils/helpers/clampNumber";
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/**
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* Given an experience amount and stat multiplier, calculates the
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* stat level. Stat-agnostic (same formula for every stat)
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*/
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export function calculateSkill(exp: number, mult = 1): number {
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return Math.max(Math.floor(mult * (32 * Math.log(exp + 534.6) - 200)), 1);
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const value = Math.floor(mult * (32 * Math.log(exp + 534.6) - 200));
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return clampNumber(value, 1);
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}
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export function calculateExp(skill: number, mult = 1): number {
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return Math.exp((skill / mult + 200) / 32) - 534.6;
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const value = Math.exp((skill / mult + 200) / 32) - 534.6;
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return clampNumber(value, 0);
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}
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export function calculateSkillProgress(exp: number, mult = 1): ISkillProgress {
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const currentSkill = calculateSkill(exp, mult);
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const nextSkill = currentSkill + 1;
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let baseExperience = calculateExp(currentSkill, mult);
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if (baseExperience < 0) baseExperience = 0;
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let nextExperience = calculateExp(nextSkill, mult);
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if (nextExperience < 0) nextExperience = 0;
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const baseExperience = calculateExp(currentSkill, mult);
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const nextExperience = calculateExp(nextSkill, mult);
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const normalize = (value: number): number => ((value - baseExperience) * 100) / (nextExperience - baseExperience);
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let progress = nextExperience - baseExperience !== 0 ? normalize(exp) : 99.99;
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// Clamp progress: When sleeves are working out, the player gets way too much progress
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if (progress < 0) progress = 0;
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if (progress > 100) progress = 100;
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const rawProgress = nextExperience - baseExperience !== 0 ? normalize(exp) : 99.99;
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const progress = clampNumber(rawProgress, 0, 100);
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// Clamp floating point imprecisions
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let currentExperience = exp - baseExperience;
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let remainingExperience = nextExperience - exp;
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if (currentExperience < 0) currentExperience = 0;
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if (remainingExperience < 0) remainingExperience = 0;
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const currentExperience = clampNumber(exp - baseExperience, 0);
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const remainingExperience = clampNumber(nextExperience - exp, 0);
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return {
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currentSkill,
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15
src/utils/helpers/clampNumber.ts
Normal file
15
src/utils/helpers/clampNumber.ts
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@ -0,0 +1,15 @@
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import { CONSTANTS } from "../../Constants";
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/**
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* Clamps the value on a lower and an upper bound
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* @param {number} value Value to clamp
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* @param {number} min Lower bound, defaults to Number.MIN_VALUE
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* @param {number} max Upper bound, defaults to Number.MAX_VALUE
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* @returns {number} Clamped value
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*/
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export function clampNumber(value: number, min = Number.MIN_VALUE, max = Number.MAX_VALUE) {
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if (isNaN(value)) {
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if (CONSTANTS.isDevBranch) throw new Error("NaN passed into clampNumber()");
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return min;
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}
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return Math.max(Math.min(value, max), min);
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}
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