refactor(stats): Math helpers ES2015 module

common/script/statHelpers.js

@@ -0,0 +1,55 @@
+/*
+  ------------------------------------------------------
+  Level cap
+  ------------------------------------------------------
+ */
+
+const maxLevel = 100;
+
+function capByLevel (lvl) {
+  if (lvl > maxLevel) {
+    return maxLevel;
+  } else {
+    return lvl;
+  }
+}
+
+/*
+  ------------------------------------------------------
+  Health cap
+  ------------------------------------------------------
+ */
+
+const maxHealth = 50;
+
+/*
+  ------------------------------------------------------
+  Scoring
+  ------------------------------------------------------
+ */
+
+function tnl (lvl) {
+  return Math.round((Math.pow(lvl, 2) * 0.25 + 10 * lvl + 139.75) / 10) * 10;
+}
+
+/*
+  A hyperbola function that creates diminishing returns, so you can't go to infinite (eg, with Exp gain).
+  {max} The asymptote
+  {bonus} All the numbers combined for your point bonus (eg, task.value * user.stats.int * critChance, etc)
+  {halfway} (optional) the point at which the graph starts bending
+ */
+
+function diminishingReturns (bonus, max, halfway) {
+  if (halfway === null) {
+    halfway = max / 2;
+  }
+  return max * (bonus / (bonus + halfway));
+}
+
+export default {
+  maxLevel,
+  capByLevel,
+  maxHealth,
+  tnl,
+  diminishingReturns,
+};