From 16d949a394f06bd78f9bb13ec008c0e54abbefb1 Mon Sep 17 00:00:00 2001
From: Mike Lynch <mike@mikelynch.org>
Date: Mon, 24 Jul 2023 10:39:11 +1000
Subject: [PATCH] Generated the vertices of the 24-cell

---
 main.js   |  5 ++---
 shapes.js | 24 ++++++++++++++++++++++++
 2 files changed, 26 insertions(+), 3 deletions(-)

diff --git a/main.js b/main.js
index 4487800..52ac2d4 100644
--- a/main.js
+++ b/main.js
@@ -192,7 +192,6 @@ scene.add(amblight);
 scene.background = new THREE.Color(0xdddddd);
 
 const renderer = new THREE.WebGLRenderer({antialias: true});
-//renderer.physicallyCorrectLights = true;
 renderer.setSize( window.innerWidth, window.innerHeight );
 document.body.appendChild( renderer.domElement );
 
@@ -210,9 +209,9 @@ link_m.roughness = 0.0;
 link_m.transparent = true;
 link_m.opacity = 0.5;
 
-console.log(SHAPES.TESSERACT);
+const struct = SHAPES.cell24();
 
-const shape = new FourDShape(node_m, link_m, SHAPES.TESSERACT);
+const shape = new FourDShape(node_m, link_m, struct);
 
 scene.add(shape);
 
diff --git a/shapes.js b/shapes.js
index 17a0b80..144a352 100644
--- a/shapes.js
+++ b/shapes.js
@@ -124,4 +124,28 @@ export const TESSERACT = {
 	]
 };
 
+export const cell24 = () => {
+	const structure = {
+		nodes: [],
+		links: []
+	};
+	const axes = [ 'x', 'y', 'z', 'w' ];
+	let i = 1;
+	for ( let p = 0; p < 3; p++ ) {
+		for ( let q = p + 1; q < 4; q++ ) {
+			const a1 = axes[p];
+			const a2 = axes[q];
+			for ( const v1 of [ -1, 1 ] ) {
+				for ( const v2 of [ -1, 1 ] ) {
+					const node = { id: i, x: 0, y: 0, z: 0, w:0 };
+					node[a1] = v1;
+					node[a2] = v2;
+					structure.nodes.push(node);
+					i++;
+				}
+			}
+		}
+	}
+	return structure;
+}