From ff9d71eba4ddead909bfe6e1631837bb72bb241c Mon Sep 17 00:00:00 2001
From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Mon, 2 Jan 2017 14:55:00 +0000
Subject: [PATCH] sewing-table: Interlock: introduce InterlockEdgePlan (nfc)

---
 sewing-table.scad.m4 | 31 ++++++++++++++++++-------------
 1 file changed, 18 insertions(+), 13 deletions(-)

diff --git a/sewing-table.scad.m4 b/sewing-table.scad.m4
index 04e4598..6c44676 100644
--- a/sewing-table.scad.m4
+++ b/sewing-table.scad.m4
@@ -121,7 +121,10 @@ module RoundLeftCorner(this_cnr, right_cnr) {
   }
 }
 
-module InterlockLobePlan(r, ymir) {
+module InterlockLobePlan(negative) {
+  r = negative ? interlock_negative_rad : interlock_rad;
+  ymir = negative ? 0 : 1;
+
   dx = sqrt(3) * r;
   $fn= 80;
   translate([thehd[0], 0]){
@@ -139,22 +142,24 @@ module InterlockLobePlan(r, ymir) {
   }
 }
 
+module InterlockEdgePlan(negative, nlobes, length) {
+  for (lobei = [ 0 : nlobes-1 ]) {
+    lobex = (length - thehd[0]*2) * (lobei ? lobei / (nlobes-1) : 0);
+    translate([lobex, 0, 0]) {
+      InterlockLobePlan(negative);
+    }
+  }
+}
+
 module InterlockEdge(left_cnr, right_cnr, negative=0, nlobes=2) {
-  r = negative ? interlock_negative_rad : interlock_rad;
   plusth = negative * 1.0;
-  ymir = negative ? 0 : 1;
 
   INREFFRAME(left_cnr, right_cnr) {
-  translate([0, 0, plusth]){
-    mirror([0,0,1]){
-      linear_extrude(height=tile_th+plusth*2, convexity=10){
-    for (lobei = [ 0 : nlobes-1 ]) {
-      lobex = (length - thehd[0]*2) * (lobei ? lobei / (nlobes-1) : 0);
-      translate([lobex, 0, 0]) {
-	InterlockLobePlan(r, ymir);
-      }
-    }
-  }
+    translate([0, 0, plusth]){
+      mirror([0,0,1]){
+	linear_extrude(height=tile_th+plusth*2, convexity=10){
+	  InterlockEdgePlan(negative, nlobes, length);
+	}
       }
     }
   }
-- 
2.30.2