From 2c283d200cf00a40bb9b0ab65f7d70173e86c86a Mon Sep 17 00:00:00 2001
From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Sat, 1 Aug 2015 23:40:16 +0100
Subject: [PATCH] pull-cord-keeper: before polygon remain cut

---
 pull-cord-keeper.scad | 42 +++++++++++++++++++++++++++++++++++++-----
 1 file changed, 37 insertions(+), 5 deletions(-)

diff --git a/pull-cord-keeper.scad b/pull-cord-keeper.scad
index 4cdac3e..c3efb7f 100644
--- a/pull-cord-keeper.scad
+++ b/pull-cord-keeper.scad
@@ -20,6 +20,8 @@ ribsgap = 1;
 ribdepth = 3;
 ribheight = 4;
 
+blockoverlapcnr = 5;
+
 module Oval(centredist, rad) {
   hull() {
     translate([-centredist/2,0,0]) circle(r=rad);
@@ -66,9 +68,14 @@ module Division(biggerpi) {
   xgap = feedxgap * biggerpi;
   zgap = feedzgap * biggerpi;
 
-  mirror([0,0,1])
-    translate([-ziglen + xgap/2, -100, zgap/2])
-    cube([100, 100, 50]);
+  mirror([0,0,1]) {
+    translate([0, 0, zgap/2 * (1 - 2*biggerpi)]) {
+      translate([-ziglen + xgap/2, -100, 0])
+	cube([100, 100, 50]);
+    }
+  }
+  translate([blockwidth/2 - blockoverlapcnr, -0.1, 0])
+    cube([100, 100, 100]);
 
   translate([50, houterrad + blockdepth/2 + ribsgap * biggerpi, 0])
     rotate([-90,0,90])
@@ -76,7 +83,7 @@ module Division(biggerpi) {
     Ribs();
 }
 
-module Demo(){
+module SDemo(){
   //difference(){
   %  Positive();
   //  Division(0);
@@ -84,5 +91,30 @@ module Demo(){
   Division(0);
 }
 
+module A(){
+  difference(){
+    Positive();
+    Division(0);
+  }
+}
+
+module B(){
+  intersection(){
+    Positive();
+    Division(1);
+  }
+}
+
+module Demo(){
+  color("red") A();
+//  color("blue") B();
+}
+
 //Ribs();
-Demo();
+//Demo();
+
+//A();
+B();
+%Division(0);
+
+//Demo();
-- 
2.30.2