refactor(es modules): migrate numberUtils

src/utils/graphUtils.ts

@@ -1,10 +1,16 @@
 import {TIME} from "../config/logging";
 import {createTypedArray} from "./arrayUtils";
+import {rn} from "./numberUtils";
 import {byId} from "./shorthands";
 
+const Delaunator = window.Delaunator;
+const Voronoi = window.Voronoi;
+const graphWidth = window.graphWidth;
+const graphHeight = window.graphHeight;
+
 // check if new grid graph should be generated or we can use the existing one
 export function shouldRegenerateGrid(grid) {
-  const cellsDesired = +byId("pointsInput").dataset.cells;
+  const cellsDesired = Number(byId("pointsInput")?.dataset.cells);
   if (cellsDesired !== grid.cellsDesired) return true;
 
   const newSpacing = rn(Math.sqrt((graphWidth * graphHeight) / cellsDesired), 2);

src/utils/numberUtils.ts

@@ -0,0 +1,21 @@
+// round value to d decimals
+export function rn(value: number, decimals: number = 0) {
+  const multiplier = Math.pow(10, decimals);
+  return Math.round(value * multiplier) / multiplier;
+}
+
+export function minmax(value: number, min: number, max: number) {
+  return Math.min(Math.max(value, min), max);
+}
+
+// return value clamped to [0, 100]
+export function lim(value: number) {
+  return minmax(value, 0, 100);
+}
+
+// normalization function
+export function normalize(val: number, min: number, max: number) {
+  return minmax((val - min) / (max - min), 0, 1);
+}
+
+// import {rn, minmax, lim, normalize} from '/src/utils/numberUtils';