wardrobe-hook: straight-on version: wip; rename

[reprap-play.git] / wardrobe-hook.scad

diff --git a/wardrobe-hook.scad b/wardrobe-hook.scad
index 7e2697698112bfb4a73823a2c221cdbb3cdb3d51..3588142ac8f50637e9fbc34aaa3826911d860b05 100644 (file)
--- a/wardrobe-hook.scad
+++ b/wardrobe-hook.scad
@@ -33,7 +33,7 @@ mainthick = 4;
 clipthick = 2;
 clipang = 135;
 
-$stemlen = 40;
+stemlen = 40;
 
 topwidth = 20;
 
@@ -42,55 +42,43 @@ 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,
-            $frontbackly = 1)
-      child();
-  }
-}
-
-module Plan(){
+module ClipPlan(qbend, qstemleny){
   dy = tubeheight - tuberad*2;
   FArcSegment(0, dy, tuberad, mainoutrad, -1, 181);
-  FArcSegment(0, 0,  tuberad, mainoutrad, -$bend, $bend+1);
+  FArcSegment(0, 0,  tuberad, mainoutrad, -qbend, qbend+1);
   translate([tuberad, 0]) square(center=false, size=[mainthick,dy]);
   FArcSegment(0, 0, tuberad, tuberad + clipthick, 360-clipang, clipang+1);
-  rotate(-$bend) translate([tuberad, 0]) mirror([0,1])
-    square(center=false, size=[mainthick, $stemlen/cos($bend)]);
+  rotate(-qbend) translate([tuberad, 0]) mirror([0,1])
+    square(center=false, size=[mainthick, qstemleny/cos(qbend)]);
+}
+
+module Plan(){
+  ClipPlan(bend,stemlen);
 }
 
 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
@@ -110,13 +98,13 @@ 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])
@@ -126,17 +114,24 @@ module Hook(){ ////toplevel
   }
 }
 
-module RightHook(){ ////toplevel
-  mirror([1,0,0]) Hook();
-}
+// straight-on version, everything prefixed with s or S
+
+sstemleny = -hookcy;
+sbend_raw = tangents_intersect_beta([0,0],tuberad,
+                                   [0,-(stemlen-hookinrad)],hookinrad);
+sbend = angle_map_range(360-sbend_raw, -180);
 
-module Bothly() {
-  Acrossly() child(0);
-  translate([70,0,0]) Frontbackly() child(0);
+module SPlan(){
+  ClipPlan(sbend, sstemleny);
 }
 
-Howly(0,70) {
-  Plan();
-  //ElevationCore();
-  //RightHook();
+// toplevels etc.
+
+module RightHook(){ ////toplevel
+  mirror([1,0,0]) Hook();
 }
+
+SPlan();
+translate([60,0,0]) Plan();
+//ElevationCore();
+//RightHook();