From 675953d334a2c223cf1d5e6c85e5120bacbc0ef9 Mon Sep 17 00:00:00 2001
From: Martin Budden <mjbudden@gmail.com>
Date: Mon, 2 Mar 2020 19:06:53 +0000
Subject: [PATCH] Allow no center hole in extrusion.

---
 vitamins/extrusion.scad | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/vitamins/extrusion.scad b/vitamins/extrusion.scad
index 40d9015..f87acfb 100644
--- a/vitamins/extrusion.scad
+++ b/vitamins/extrusion.scad
@@ -101,7 +101,8 @@ module extrusion_cross_section(type, cornerHole) {
         translate([0,i*width+(width-height)/2])
             difference() {
                 square([centerSquare,centerSquare],center=true);
-                circle(d=extrusion_center_hole(type));
+                if(extrusion_center_hole(type)>0)
+                    circle(d=extrusion_center_hole(type));
             }
     translate([0,(width-height)/2])
         for(angle=[0,90])