From c1b245c859354fbb1d1da483babb82f8674d2d41 Mon Sep 17 00:00:00 2001
From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Sun, 23 Feb 2014 13:18:06 +0000
Subject: [PATCH] wardrobe-hook: frontbackly version: wip assing()ish, before
 revert

---
 wardrobe-hook.scad | 74 ++++++++++++++++++++++++++++++----------------
 1 file changed, 49 insertions(+), 25 deletions(-)

diff --git a/wardrobe-hook.scad b/wardrobe-hook.scad
index 2636947..7e26976 100644
--- a/wardrobe-hook.scad
+++ b/wardrobe-hook.scad
@@ -33,7 +33,7 @@ mainthick = 4;
 clipthick = 2;
 clipang = 135;
 
-stemlen = 40;
+$stemlen = 40;
 
 topwidth = 20;
 
@@ -42,39 +42,55 @@ hookcurl = 60;
 hookwidth = 4;
 
 tuberad = tubewidth/2;
-bend = atan(tuberad/stemlen);
 mainoutrad = tuberad + mainthick;
 hookoutrad = hookinrad + hookwidth;
-hookcy = -(stemlen - hookoutrad);
+$hookcy = -($stemlen - hookoutrad);
 
-eltop = [topwidth/2, -tuberad + tubeheight + mainthick + 0.1];
-elmid = [topwidth/2, -tuberad];
-ellow = tangent_intersect_b([0,hookcy], hookinrad, elmid);
-ellowextra = 180 - tangent_intersect_beta([0,hookcy], hookinrad, elmid);
+$eltop = [topwidth/2, -tuberad + tubeheight + mainthick + 0.1];
+$elmid = [topwidth/2, -tuberad];
+$ellow = tangent_intersect_b([0,$hookcy], hookinrad, $elmid);
+$ellowextra = 180 - tangent_intersect_beta([0,$hookcy], hookinrad, $elmid);
+
+$bend = 0;
+
+module Howly(acrossly_x, frontbackly_x){
+  if (acrossly_x >= 0) {
+    translate([acrossly_x,0,0])
+      assign($bend = atan(tuberad/$stemlen),
+	     $frontbackly = 0)
+      child();
+  }
+  if (frontbackly_x >= 0) {
+    translate([frontbackly_x,0,0])
+      assign($bend = 0,
+	     $frontbackly = 1)
+      child();
+  }
+}
 
 module Plan(){
   dy = tubeheight - tuberad*2;
   FArcSegment(0, dy, tuberad, mainoutrad, -1, 181);
-  FArcSegment(0, 0,  tuberad, mainoutrad, -bend, bend+1);
+  FArcSegment(0, 0,  tuberad, mainoutrad, -$bend, $bend+1);
   translate([tuberad, 0]) square(center=false, size=[mainthick,dy]);
   FArcSegment(0, 0, tuberad, tuberad + clipthick, 360-clipang, clipang+1);
-  rotate(-bend) translate([tuberad, 0]) mirror([0,1])
-    square(center=false, size=[mainthick, stemlen/cos(bend)]);
+  rotate(-$bend) translate([tuberad, 0]) mirror([0,1])
+    square(center=false, size=[mainthick, $stemlen/cos($bend)]);
 }
 
 module ElevationCore(){
-  FArcSegment(0, hookcy, hookinrad, hookoutrad,
-	      180 - ellowextra,
-	      90 + hookcurl + ellowextra);
+  FArcSegment(0, $hookcy, hookinrad, hookoutrad,
+	      180 - $ellowextra,
+	      90 + hookcurl + $ellowextra);
   translate([-hookoutrad*sqrt(0.5),
-	      hookcy - hookoutrad*sqrt(0.5) + 0.1])
+	      $hookcy - hookoutrad*sqrt(0.5) + 0.1])
     mirror([1,0])
-    square(center=false, size=[topwidth, stemlen + tubeheight + 20]);
-  polygon([[-hookoutrad, ellow[1]],
-	   reflect_in_y(eltop),
-	   eltop,
-	   elmid,
-	   ellow]);
+    square(center=false, size=[topwidth, $stemlen + tubeheight + 20]);
+  polygon([[-hookoutrad, $ellow[1]],
+	   reflect_in_y($eltop),
+	   $eltop,
+	   $elmid,
+	   $ellow]);
 }
 
 // after here is all 3D
@@ -94,13 +110,13 @@ module PlaneAbove(){
   translate([-100,-100,0]) cube(center=false,size=[200,200,200]);
 }
 
-taperangle = -270 + tangent_intersect_beta([-hookcy, 0],
+taperangle = -270 + tangent_intersect_beta([-$hookcy, 0],
 					  hookoutrad,
-					  [-eltop[1], -eltop[0]]);
+					  [-$eltop[1], -$eltop[0]]);
 module Hook(){ ////toplevel
   difference(){
     rotate([taperangle,0,0])
-      translate([0,-eltop[1],0])
+      translate([0,-$eltop[1],0])
       Primary();
     translate([0,0,topwidth/2])
       rotate([taperangle*2,0,0])
@@ -114,5 +130,13 @@ module RightHook(){ ////toplevel
   mirror([1,0,0]) Hook();
 }
 
-//ElevationCore();
-RightHook();
+module Bothly() {
+  Acrossly() child(0);
+  translate([70,0,0]) Frontbackly() child(0);
+}
+
+Howly(0,70) {
+  Plan();
+  //ElevationCore();
+  //RightHook();
+}
-- 
2.30.2