From af0a47a6fef6d621eb9d566f807aee1fa9b42a3b Mon Sep 17 00:00:00 2001
From: Jason Hall <jason@chainguard.dev>
Date: Tue, 21 Jan 2025 11:20:44 -0500
Subject: [PATCH] Add files via upload

---
 board.scad | 67 ++++++++++++++++++++++++++----------------------------
 1 file changed, 32 insertions(+), 35 deletions(-)

diff --git a/board.scad b/board.scad
index 52eba04..c571034 100644
--- a/board.scad
+++ b/board.scad
@@ -1,43 +1,40 @@
 // https://github.com/BelfrySCAD/BOSL2/wiki/polyhedra.scad
 include <BOSL2/std.scad>
+$slop = 0.15; // https://github.com/BelfrySCAD/BOSL2/wiki/constants.scad#constant-slop
+
 include <BOSL2/polyhedra.scad>
+include <BOSL2/ball_bearings.scad>
 
-module snub_dodecahedron_with_holes() {
-    difference() {
-        regular_polyhedron("snub dodecahedron");
 
-        // Hollow it out, leaving 1/8" walls.
-        // With 50% infill this should be enough to be sturdy and hold magnets.
-        regular_polyhedron("snub dodecahedron", side=7/8);
+difference() {
+    regular_polyhedron("snub dodecahedron", side=INCH);
 
-        // Subtract holes for magnets, in all faces except those adjacent to the bottom face.
-        regular_polyhedron("snub dodecahedron", draw=false)
-            if (
-                $faceindex != 0 &&
-                $faceindex != 1 &&
-                $faceindex != 2 &&
-                $faceindex != 3 &&
-                $faceindex != 4 &&
-                $faceindex != 11 &&
-                $faceindex != 40 &&
-                $faceindex != 41 &&
-                $faceindex != 43 &&
-                $faceindex != 60 &&
-                $faceindex != 61 &&
-                $faceindex != 62 &&
-                $faceindex != 63 &&
-                $faceindex != 72 &&
-                $faceindex != 88 &&
-                $faceindex != 90
-            )
-                cylinder(d=1/8, h=1/16, center=true, $fn=100);
+    // Hollow it out, leaving ~1/8" walls.
+    regular_polyhedron("snub dodecahedron", side=15/16*INCH);
 
-        // Hole for bottom bearing.
-        translate([0,0,-1.9024]) // guessed and checked this
-            cylinder(d=.35, h=.35/2, center=true, $fn=100); //9mm diam, for 8mm bearing
-    }
+    // Subtract holes for magnets, in all faces except those adjacent to the bottom face.
+    regular_polyhedron("snub dodecahedron", draw=false, side=INCH)
+        if (
+            $faceindex != 0 &&
+            $faceindex != 1 &&
+            $faceindex != 2 &&
+            $faceindex != 3 &&
+            $faceindex != 4 &&
+            $faceindex != 11 &&
+            $faceindex != 40 &&
+            $faceindex != 41 &&
+            $faceindex != 43 &&
+            $faceindex != 60 &&
+            $faceindex != 61 &&
+            $faceindex != 62 &&
+            $faceindex != 63 &&
+            $faceindex != 72 &&
+            $faceindex != 88 &&
+            $faceindex != 90
+        )
+            cylinder(d=1/8*INCH+get_slop(), h=1/16*INCH+get_slop(), center=true, $fn=100);
+        else if ($faceindex == 3)
+            // Hole for a bearing.
+            // https://www.thingiverse.com/thing:2349065
+            cylinder(d=INCH+get_slop(), h=INCH, center=true, $fn=100);
 }
-
-// Render the snub dodecahedron with the holes
-scale([25.4, 25.4, 25.4]) // millimeters to inches -- this ensures 1" side lengths.
-    snub_dodecahedron_with_holes();