Added basic automatic colour schemes and colourised the first

24-cell of the 600-cell

colours.js

@@ -0,0 +1,8 @@
+import ColorScheme from 'color-scheme';
+
+export const get_colours = () => {
+	var scheme = new ColorScheme;
+	scheme.from_hue(21).scheme('triade').variation('soft');
+	return scheme.colors().map((cs) => parseInt('0x' + cs));
+}
+

main.js

@@ -6,6 +6,7 @@ import * as POLYTOPES from './polytopes.js';
 import { rotfn } from './rotation.js';
 import { FourDGUI } from './gui.js';
 import { FourDShape } from './fourDShape.js';
+import { get_colours } from './colours.js';
 
 // scene, lights and camera
 
@@ -30,8 +31,9 @@ document.body.appendChild( renderer.domElement );
 
 scene.background = new THREE.Color(0x808080);
 const material = new THREE.MeshStandardMaterial({ color: 0x3293a9 });
+const node_colours = get_colours();
 
-const node_ms = [ material ];
+const node_ms = node_colours.map((c) => new THREE.MeshStandardMaterial({color: c}));
 
 const link_ms = [ material ];
 

package-lock.json

@@ -5,6 +5,7 @@
   "packages": {
     "": {
       "dependencies": {
+        "color-scheme": "^1.0.1",
         "lil-gui": "^0.18.2",
         "three": "^0.154.0"
       },
@@ -364,6 +365,11 @@
         "node": ">=12"
       }
     },
+    "node_modules/color-scheme": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/color-scheme/-/color-scheme-1.0.1.tgz",
+      "integrity": "sha512-4x+ya6+z6g9DaTFSfVzTZc8TSjxHuDT40NB43N3XPUkQlF6uujhwH8aeMeq8HBgoQQog/vrYgJ16mt/eVTRXwQ=="
+    },
     "node_modules/esbuild": {
       "version": "0.18.15",
       "resolved": "https://registry.npmjs.org/esbuild/-/esbuild-0.18.15.tgz",

package.json

@@ -1,5 +1,6 @@
 {
   "dependencies": {
+    "color-scheme": "^1.0.1",
     "lil-gui": "^0.18.2",
     "three": "^0.154.0"
   },

polytopes.js

@@ -176,9 +176,9 @@ function make_600cell_vertices() {
 
 	const nodes = [
 		PERMUTE.coordinates([0, 0, 0, 2],  0),
-		PERMUTE.coordinates([1, 1, 1, 1],  0),
+		PERMUTE.coordinates([1, 1, 1, 1],  1),
 
-		PERMUTE.coordinates([phi, 1, 1 / phi, 0], 0, true)
+		PERMUTE.coordinates([phi, 1, 1 / phi, 0], 1, true)
 		].flat();
 	return scale_and_index(nodes, 0.75);
 }
@@ -191,7 +191,7 @@ export const cell600 = () => {
 		nodes: nodes,
 		links: links,
 		geometry: {
-			node_size: 0.02,
+			node_size: 0.08,
 			link_size: 0.02
 		}
 	}