started on segment mobius strip

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);
+