From 0e73fe56c5d2a328352d28678e0ba9d77ce8c4b5 Mon Sep 17 00:00:00 2001
From: Trammell Hudson <hudson@trmm.net>
Date: Sat, 3 Jan 2015 08:47:25 +0100
Subject: [PATCH] started on segment mobius strip

---
 mobius.scad | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)
 create mode 100644 mobius.scad

diff --git a/mobius.scad b/mobius.scad
new file mode 100644
index 0000000..ba6022a
--- /dev/null
+++ b/mobius.scad
@@ -0,0 +1,36 @@
+module triangle(s)
+{
+	scale(s)
+	polygon(points=[
+		[-1/2, -sqrt(3)/4 + sqrt(3)/12],
+		[   0, +sqrt(3)/4 + sqrt(3)/12],
+		[+1/2, -sqrt(3)/4 + sqrt(3)/12],
+	]);
+}
+
+
+thick=10;
+sides=16;
+radius=50;
+
+module segment(n)
+{
+	translate([radius-thick/2,0,0])
+	rotate([90,0,0])
+	rotate([0,0,n*120/sides])
+	linear_extrude(
+		height=radius*3.1415*2/sides,
+		twist=120/sides,
+		center=true,
+		slices=1
+	)
+	triangle(thick);
+}
+
+for(i=[1:sides])
+{
+	rotate([0,0,i*360/sides]) segment(i);
+}
+
+%cylinder(r=radius,height=5);
+