From 14d5186a4586ffc22fa590d63233d3b214fda4cd Mon Sep 17 00:00:00 2001
From: Mike Lynch <m.lynch@sydney.edu.au>
Date: Sun, 1 Feb 2026 16:41:44 +1100
Subject: [PATCH] Added the document where I'm mapping the inscribed 600-cell
 to the primary one

---
 600_CELL_MAPPING.md | 61 +++++++++++++++++++++++++++++++++++++++++++++
 polytopes.js        |  2 +-
 2 files changed, 62 insertions(+), 1 deletion(-)
 create mode 100644 600_CELL_MAPPING.md

diff --git a/600_CELL_MAPPING.md b/600_CELL_MAPPING.md
new file mode 100644
index 0000000..3709453
--- /dev/null
+++ b/600_CELL_MAPPING.md
@@ -0,0 +1,61 @@
+# 600-cell mapping
+
+These are the nodes from a 120-cell which are on one of its inscribed 600-cells,
+sorted into layers (just the first half because the second half mirror these ones)
+
+Start: [ 27 ]
+
+0: [ 27 ]
+0.618:
+[
+  223, 253, 265, 331,
+  339, 393, 419, 427,
+  473, 511, 539, 555
+]
+
+1
+[
+   95, 105, 131, 140, 165, 179,
+  185, 207, 258, 274, 306,
+  313, 347, 367, 449, 471,
+  499, 527, 573, 585
+]
+
+1.175
+[
+  231, 285, 289, 324,
+  378, 388, 413, 425,
+  487, 513, 543, 563
+]
+
+1.414
+[
+   48,  49,  61,  68,  74,  87, 234,
+  239, 241, 248, 300, 301, 356, 357,
+  369, 376, 403, 406, 444, 453, 460,
+  469, 490, 503, 525, 532, 572, 581,
+  592, 593
+]
+
+## Manual mapping progress
+
+Starting from 27 on the inscribed 600 cell and 1 on the primary 600 cell, here are
+the two arctic circles
+
+Pole: 27: 1
+
+Arctic circle:
+
+419: 41
+223: 49
+253: 45
+331: 53
+427: 109
+339: 105
+511: 51
+265: 107
+473: 111
+539: 55
+555: 43
+393: 47
+
diff --git a/polytopes.js b/polytopes.js
index 92aaf97..1fd2d9e 100644
--- a/polytopes.js
+++ b/polytopes.js
@@ -381,7 +381,7 @@ export function make_120cell_vertices_alt() {
 
 
 
-function label_nodes(nodes, ids, label) {
+export function label_nodes(nodes, ids, label) {
 	nodes.filter((n) => ids.includes(n.id)).map((n) => n.label = label);
 }