From 393433331138b38ee2e1826ba9d63f10a354e2d0 Mon Sep 17 00:00:00 2001
From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Thu, 1 Jan 2015 23:53:19 +0000
Subject: [PATCH] knifeblock: Holes refactor: break out HexGrid (nfc)

---
 knifeblock.scad | 29 +++++++++++++++++------------
 1 file changed, 17 insertions(+), 12 deletions(-)

diff --git a/knifeblock.scad b/knifeblock.scad
index b1a4052..4742458 100644
--- a/knifeblock.scad
+++ b/knifeblock.scad
@@ -224,6 +224,20 @@ module HolesScope(){
   }
 }
 
+module HexGrid(imin,imax,jmin,jmax) {
+  for (i=[imin:imax]) {
+    for (j=[jmin:jmax]) {
+      translate([j * sqrt(3) * holepitch,
+		 (i+0.5)*holepitch,
+		 0]) {
+	child();
+	translate([sqrt(3)/2 * holepitch, -0.5 * holepitch, 0])
+	  child();
+      }
+    }
+  }
+}
+
 module Hole(){
   cylinder(r=holesize/2, h=40, $fn=40);
 }
@@ -234,18 +248,9 @@ module Holes(){
   jmin = ceil((maxx-minx)/(sqrt(3)*holepitch));
   echo("Holes X count 2 x", jmin);
   intersection(){
-    translate([holeoffx * holepitch, holeoffy * holepitch, 0]) {
-      for (i=[0:imax]) {
-	translate([0, (i+0.5)*holepitch, -20])
-	  for (j=[-jmin:2]) {
-	    translate([j * sqrt(3) * holepitch, 0, 0]) {
-	      Hole();
-	      translate([sqrt(3)/2 * holepitch, -0.5 * holepitch, 0])
-		Hole();
-	    }
-	  }
-      }
-    }
+    translate([holeoffx * holepitch, holeoffy * holepitch, -20])
+      HexGrid(0,imax,-jmin,2)
+      Hole();
     HolesScope();
   }
 }
-- 
2.30.2