update gitignore, and regen stls

.gitignore

@@ -8,3 +8,5 @@
 !/stl/nano/
 
 /assembly-guide/gifs/tmp
+
+.DS_Store

README.md

@@ -6,7 +6,7 @@
 - ***Mount Anything:*** Perfect for organizing SBCs, mini PCs, small switches, power hubs, etc.
 - ***Fully customizable:*** Fully written in OpenSCAD. Everything, from the dimensions of the rack, to the roundness of the corners, can be modified with a simple code change.
 - ***Printable from home:*** Designed to be printed with conventional FDM printers. Requires minimal supports when printing, and final assembly needs only a few easy-to-source parts. 
-- ***No cage nuts!*** Sliding hex nut design for the front rails allows one to easily mount items, without dealing with cage nuts.
+- ***No cage nuts:*** Sliding hex nut design for the front rails allows one to easily mount items, without dealing with cage nuts.
 - ***Stackable:*** Individual racks can be easily stacked and fastened together. Mix and match different color and design combinations!
 
 ## Assembly

TODO.md

@@ -2,10 +2,11 @@
 
 ### Actual TODO
 
-- Finish refactoring files to use the application style, like in `yBar.scad`
+- Finish refactoring files to use the application style, like in `yBar.scad`.
-- Figure out why sidewall build is so slow
+- Figure out why sidewall build is so slow.
-- Clean up `sharedVariables.scad`!!!
+- Clean up `sharedVariables.scad`.
 - Parallel builds with cli tool. 
+- Beef up rack-mount designs.
 
 ### Ideas
 - Start using matrices for transformations. Enforce strict local/global hierarchy of matrix transformations.

rack/stackEnds.scad

@@ -63,6 +63,58 @@ module rackFeet() {
   }
 }
 
-module stackConnectorHandle() {
+rackTopHandle();
 
+module rackTopHandle() {
+
+
+  handleWidth = 20;
+  handleHeight = 50;
+
+  handleTopThickness = 10;
+  handleBottomThickness = 10;
+  handleSideThickness = 10;
+
+  handleR = baseRoundness;
+
+  handleRing();
+
+  module handleRing() {
+
+    w = handleWidth - 2*handleR;
+    st = max(eps,handleSideThickness - 2*handleR);
+    bt = max(eps,handleBottomThickness - 2*handleR);
+    tt = max(eps,handleTopThickness - 2*handleR);
+
+    y =100;
+
+    minkowski() {
+
+      sphere(r=handleR);
+
+      ringFourHull() {
+        cube(size = [w, st, bt]);
+
+        translate(v = [0, y-handleSideThickness, 0])
+          cube(size = [w, st, bt]);
+
+        translate(v = [0, y-handleSideThickness, handleHeight-handleTopThickness])
+          cube(size = [w, st, tt]);
+
+        translate(v = [0, 0, handleHeight-handleTopThickness])
+          cube(size = [w, st, tt]);
+      }
+    }
+
+  }
+
+
+  module ringFourHull() {
+    union() {
+      hull() {children(0); children(1);}
+      hull() {children(1); children(2);}
+      hull() {children(2); children(3);}
+      hull() {children(3); children(0);}
+    }
+  }
 }