add stem_inner_slop to all places where it is supposed to be

Fix rounded_cherry stem to properly use $stem_inner_slop

CHANGELOG.md

@@ -0,0 +1,16 @@
+CHANGELOG:
+  V2.0.0:
+    * added $fa values for minkowski and shape - so you can customize how much rounding there is
+    * rejiggered `key.scad` pipeline for more clarity and less shapes
+    * implemented "3d_surface" dish - still in beta
+      * super cool though, you can even change the distribution of points on the surface! just make sure you use monotonically increasing functions
+    * created "hull" folder to house different ways of creating the overall key shape
+    * promoted "feature" folder to first-class folder with keytext and switch clearance as new residents
+    * wrote this changelog!
+    * implemented `$inner_shape_type`, use "flat" for less geometry or "disable" to make a completely solid key easily. didn't help render rounded keys though
+    * side-printed keycaps are first class! you can use the `sideways()` modifier to set up sideways keycaps that have flat sides to print on.
+    * it's much easier to make quick artisans now that the inside of the keycap is differenced from any additive features placed on top
+    * `$linear_extrude_shape` and `$skin_extrude_shape` retired in favor of `$hull_shape_type`
+    * added regular_polygon shape and octagonal and hexagonal key profiles
+    * added beta kailh choc
+    * Finally got ISO Enter working correctly!

README.md

@@ -9,6 +9,14 @@ Relevant links:
 * Shapeways: https://www.shapeways.com/designer/rsheldiii/creations
 * Buy me a coffee: https://ko-fi.com/rsheldiii, but only if you want to!
 
+# V2.0.0 Cutover
+
+As of February 19th, 2022, the v2.0.0 branch has been merged into master.
+
+This branch completely rewrote key.scad to be much simpler and faster. If you're just starting out, please use master and report any bugs you find.
+
+If you branched off this repo previously, merging to master will probably break any additions you've made. If you need the prior version of the code for whatever reason, v1.1.0 is master just before the v2.0.0 merge. I will be backporting bugfixes to the v1 branch, so if you see v1.1.1 or higher, use that instead.
+
 ## How to run
 
 #### OpenSCAD Proper (recommended way)
@@ -17,7 +25,19 @@ If you are technically inclined at all, this is definitely the best way to run t
 
 First, you'll need OpenSCAD: http://www.openscad.org/downloads.html. I highly recommend installing the development snapshot, as they generally support more features and are relatively stable. Development snapshots are listed in their own section on the downloads page.
 
-After you have openSCAD installed, you need to download the code and run it. running `git clone https://github.com/rsheldiii/KeyV2.git` if you have git, or downloading [this zip](https://github.com/rsheldiii/KeyV2/archive/master.zip) and extracting the directory should do it. Then all you need to do is open `keys.scad` with openSCAD and you are set! It is possible to edit this project with an external editor by checking off Design => 'Automatic Reload and Preview' in OpenSCAD.
+After you have openSCAD installed, you need to download the code and run it. running `git clone https://github.com/rsheldiii/openSCAD-projects.git` if you have git, or downloading [this zip](https://github.com/rsheldiii/openSCAD-projects/archive/master.zip) and extracting the directory should do it. 
+
+To make your own key, all you need to do is open `keys.scad` with openSCAD and modify this line:
+
+```
+dcs_row(5) legend("⇪", size=9) key();
+``` 
+
+To be whatever you want. For example, this is for a ctrl key on an OEM keyboard:  
+
+```u(1.25) oem_row(3) legend("ctrl", size=4.5) key();```
+
+It is possible to edit this project with an external editor by checking off Design => 'Automatic Reload and Preview' in OpenSCAD.
 
 All examples below assume you are running the library on your computer with OpenSCAD.
 
@@ -70,7 +90,7 @@ These modifier functions may not cover every use case; in that case, you may hav
 
 new to the library and still in a beta state, layouts allows you to generate an entire layout for a keyboard!
 
-It is recommended to use tined stem support and set `$extra_long_stem_support = true` if you plan on printing these keycaps.
+It is recommended to print layouts with a brim that extends to the next key.
 
 ```
 60_percent_default("dcs") key();

TIPS_AND_TRICKS.md

@@ -14,7 +14,7 @@ At the end of the day though, all the columnular sculpting is doing is adding ex
 
 ## skin mode
 
-SA, HiPro and DSA keycaps take _forever_ to render. This is a multifaceted issue that I don't want to get into here, but suffice to say _one_ of the reasons it takes so long is how the keycap is constructed from multiple, smaller slices. OpenSCAD takes more time to render the more objects you have, regardless of how they interact. Enter `$skin_extrude_shape = true`.
+SA, HiPro and DSA keycaps take _forever_ to render. This is a multifaceted issue that I don't want to get into here, but suffice to say _one_ of the reasons it takes so long is how the keycap is constructed from multiple, smaller slices. OpenSCAD takes more time to render the more objects you have, regardless of how they interact. Enter `$hull_shape_type = "skin"`.
 
 `skin()` is a list comprehension function available [here](https://github.com/openscad/list-comprehension-demos/blob/master/skin.scad). The gist of it is that instead of having x number of keycap slices unioned together, we give `skin()` a set of profiles and it makes a single object out of it for us. This reduces the number of objects per keycap, which makes it easier to render them.
 

TODO.md

@@ -0,0 +1,9 @@
+TODO:
+  * Make flat stem support default
+  * make flat inner shape default
+  * support repositioning to print on the back surface of the keycap
+  * implement regular polygon for skin extrusions
+  * switch to skin-shaped extrusions by default
+  * kailh choc has a non-square key unit; should I get that working for layouts etc? 
+  * move everything over to layouts requiring a child key
+  * add an "errors" or "warnings" or "suggestions" echo section in key.scad, right when the key is being made, so the errors don't get lost / repeated

src/constants.scad

@@ -1,3 +1,4 @@
+// a safe theoretical distance between two vertices such that they don't collapse. hard to use
 SMALLEST_POSSIBLE = 1/128;
-$fs = .1;
-$unit = 19.05;
+$fs=0.1;
+$unit=19.05;

src/dishes/3d_surface.scad

@@ -8,7 +8,7 @@ module 3d_surface_dish(width, height, depth, inverted) {
   // skew and tilt of the top. it's a pain to calculate though
   scale_factor = 1.1;
   // the edges on this behave differently than with the previous dish implementations
-  scale([width*scale_factor/$3d_surface_size/2,height*scale_factor/$3d_surface_size/2,depth]) rotate([inverted ? 0:180,0,90]) polar_3d_surface(bottom=-10);
+  scale([width*scale_factor/$3d_surface_size/2,height*scale_factor/$3d_surface_size/2,depth]) rotate([inverted ? 0:180,0,180]) polar_3d_surface(bottom=-10);
   /* %scale([width*scale_factor/$3d_surface_size/2,height*scale_factor/$3d_surface_size/2,depth]) rotate([180,0,0]) polar_3d_surface(bottom=-10); */
 
 }

src/features.scad

@@ -0,0 +1,5 @@
+// features are any premade self-contained objects that go on top or inside
+
+include <features/key_bump.scad>
+include <features/clearance_check.scad>
+include <features/legends.scad>

src/features/clearance_check.scad

@@ -0,0 +1,24 @@
+// a fake cherry keyswitch, abstracted out to maybe replace with a better one later
+module cherry_keyswitch() {
+  union() {
+    hull() {
+      cube([15.6, 15.6, 0.01], center=true);
+      translate([0,1,5 - 0.01]) cube([10.5,9.5, 0.01], center=true);
+    }
+    hull() {
+      cube([15.6, 15.6, 0.01], center=true);
+      translate([0,0,-5.5]) cube([13.5,13.5,0.01], center=true);
+    }
+  }
+}
+
+//approximate (fully depressed) cherry key to check clearances
+module clearance_check() {
+  if($stem_type == "cherry" || $stem_type == "cherry_rounded"){
+    color($warning_color){
+      translate([0,0,3.6 + $stem_inset - 5]) {
+        cherry_keyswitch();
+      }
+    }
+  }
+}

src/features/legends.scad

@@ -0,0 +1,26 @@
+module keytext(text, position, font_size, depth) {
+  woffset = (top_total_key_width()/3.5) * position[0];
+  hoffset = (top_total_key_height()/3.5) * -position[1];
+  translate([woffset, hoffset, -depth]){
+    color($tertiary_color) linear_extrude(height=$dish_depth + depth){
+      text(text=text, font=$font, size=font_size, halign="center", valign="center");
+    }
+  }
+}
+
+module legends(depth=0) {
+  if (len($front_legends) > 0) {
+    front_of_key() {
+      for (i=[0:len($front_legends)-1]) {
+        rotate([90,0,0]) keytext($front_legends[i][0], $front_legends[i][1], $front_legends[i][2], depth);
+  	  }
+    }
+  }
+  if (len($legends) > 0) {
+    top_of_key() {
+      for (i=[0:len($legends)-1]) {
+        keytext($legends[i][0], $legends[i][1], $legends[i][2], depth);
+      }
+    }
+  }
+}

src/functions.scad

@@ -4,6 +4,8 @@ include <constants.scad>
 // functions need to be explicitly included, unlike special variables, which
 // just need to have been set before they are used. hence this file
 
+function stem_height() = $total_depth - $dish_depth - $stem_inset;
+
 // cherry stem dimensions
 function outer_cherry_stem(slop) = [7.2 - slop * 2, 5.5 - slop * 2];
 
@@ -31,7 +33,7 @@ function top_total_key_height() = $bottom_key_height + ($unit * ($key_height - 1
 
 function side_tilt(column) = asin($unit * column / $double_sculpt_radius);
 // tan of 0 is 0, division by 0 is nan, so we have to guard
-function extra_side_tilt_height(column) = side_tilt(column) ? ($double_sculpt_radius - (unit * abs(column)) / tan(abs(side_tilt(column)))) : 0;
+function extra_side_tilt_height(column) = side_tilt(column) ? ($double_sculpt_radius - ($unit * abs(column)) / tan(abs(side_tilt(column)))) : 0;
 
 // (I think) extra length of the side of the keycap due to the keytop being tilted.
 // necessary for calculating flat sided keycaps
@@ -57,9 +59,14 @@ function surface_function(x,y) = 1;
 function surface_function(x,y) = (sin(acos(x/$3d_surface_size)));
 // spherical
 function surface_function(x,y) = (sin(acos(x/$3d_surface_size))) * sin(acos(y/$3d_surface_size));
-// (statically) random!
+// ripples
+/* function surface_function(x,y) = cos(pow(pow(x,2)+pow(y,2),0.5)*10)/4+0.75; */
+// Rosenbrock's banana
+/* function surface_function(x,y) = (pow(1-(x/100), 2) + 100 * pow((y/100)-pow((x/100),2),2))/200 + 0.1; */
+// y=x revolved around the y axis
+/* function surface_function(x,y) = 1/(pow(pow(x,2)+pow(y,2),0.5)/100 + .01); */
 /* function surface_function(x,y) = sin(rands(0,90,1,x+y)[0]); */
 // adds uniform rounding radius for round-anything polyRound
 function add_rounding(p, radius)=[for(i=[0:len(p)-1])[p[i].x,p[i].y, radius]];
 // computes millimeter length from unit length
-function unit_length(length) = unit * (length - 1) + 18.16;
+function unit_length(length) = $unit * (length - 1) + 18.16;

src/hulls.scad

@@ -0,0 +1,19 @@
+include <hulls/skin.scad>
+include <hulls/linear_extrude.scad>
+include <hulls/hull.scad>
+
+// basic key shape, no dish, no inside
+// which is only used for dishing to cut the dish off correctly
+// $height_difference used for keytop thickness
+// extra_slices is a hack to make inverted dishes still work
+module shape_hull(thickness_difference, depth_difference, extra_slices = 0){
+  render() {
+    if ($hull_shape_type == "skin") {
+      skin_extrude_shape_hull(thickness_difference, depth_difference, extra_slices);
+    } else if ($hull_shape_type == "linear extrude") {
+      linear_extrude_shape_hull(thickness_difference, depth_difference, extra_slices);
+    } else {
+      hull_shape_hull(thickness_difference, depth_difference, extra_slices);
+    }
+  }
+}

src/hulls/hull.scad

@@ -0,0 +1,33 @@
+module hull_shape_hull(thickness_difference, depth_difference, extra_slices = 0) {
+  for (index = [0:$height_slices - 1 + extra_slices]) {
+    hull() {
+      shape_slice(index / $height_slices, thickness_difference, depth_difference);
+      shape_slice((index + 1) / $height_slices, thickness_difference, depth_difference);
+    }
+  }
+}
+
+module shape_slice(progress, thickness_difference, depth_difference) {
+  skew_this_slice = $top_skew * progress;
+  x_skew_this_slice = $top_skew_x * progress;
+
+  depth_this_slice = ($total_depth - depth_difference) * progress;
+
+  tilt_this_slice = -$top_tilt / $key_height * progress;
+  y_tilt_this_slice = $double_sculpted ? (-$top_tilt_y / $key_length * progress) : 0;
+
+  translate([x_skew_this_slice, skew_this_slice, depth_this_slice]) {
+    rotate([tilt_this_slice,y_tilt_this_slice,0]){
+      linear_extrude(height = SMALLEST_POSSIBLE, scale = 1){
+        key_shape(
+          [
+            total_key_width(thickness_difference),
+            total_key_height(thickness_difference)
+          ],
+          [$width_difference, $height_difference],
+          progress
+        );
+      }
+    }
+  }
+}

src/hulls/linear_extrude.scad

@@ -0,0 +1,18 @@
+// corollary is hull_shape_hull
+// extra_slices unused, only to match argument signatures
+module linear_extrude_shape_hull(thickness_difference, depth_difference, extra_slices = 0){
+  height = $total_depth - depth_difference;
+  width_scale = top_total_key_width() / total_key_width();
+  height_scale = top_total_key_height() / total_key_height();
+
+  translate([0,$linear_extrude_height_adjustment,0]){
+    linear_extrude(height = height, scale = [width_scale, height_scale]) {
+        translate([0,-$linear_extrude_height_adjustment,0]){
+        key_shape(
+          [total_key_width(), total_key_height()],
+          [thickness_difference, thickness_difference]
+        );
+      }
+    }
+  }
+}

src/hulls/skin.scad

@@ -0,0 +1,34 @@
+// use skin() instead of successive hulls. much more correct, and looks faster
+// too, in most cases. successive hull relies on overlapping faces which are
+// not good. But, skin works on vertex sets instead of shapes, which makes it
+// a lot more difficult to use
+module skin_extrude_shape_hull(thickness_difference, depth_difference, extra_slices = 0 ) {
+  skin([
+    for (index = [0:$height_slices + extra_slices])
+      let(
+        progress = (index / $height_slices),
+        skew_this_slice = $top_skew * progress,
+        x_skew_this_slice = $top_skew_x * progress,
+        depth_this_slice = ($total_depth - depth_difference) * progress,
+        tilt_this_slice = -$top_tilt / $key_height * progress,
+        y_tilt_this_slice = $double_sculpted ? (-$top_tilt_y / $key_length * progress) : 0
+      )
+      skin_shape_slice(progress, thickness_difference, skew_this_slice, x_skew_this_slice, depth_this_slice, tilt_this_slice, y_tilt_this_slice)
+  ]);
+}
+
+function skin_shape_slice(progress, thickness_difference, skew_this_slice, x_skew_this_slice, depth_this_slice, tilt_this_slice, y_tilt_this_slice) =
+  transform(
+    translation([x_skew_this_slice,skew_this_slice,depth_this_slice]),
+    transform(
+      rotation([tilt_this_slice,y_tilt_this_slice,0]),
+        skin_key_shape([
+          total_key_width(0) - thickness_difference,
+          total_key_height(0) - thickness_difference,
+          ],
+          [$width_difference, $height_difference],
+          progress,
+          thickness_difference
+        )
+    )
+  );

src/key.scad

@@ -6,7 +6,8 @@ include <stems.scad>
 include <stem_supports.scad>
 include <dishes.scad>
 include <supports.scad>
-include <key_features.scad>
+include <features.scad>
+include <hulls.scad>
 
 include <libraries/geodesic_sphere.scad>
 
@@ -19,201 +20,31 @@ use <libraries/skin.scad>
 // key shape including dish. used as the ouside and inside shape in hollow_key(). allows for itself to be shrunk in depth and width / height
 module shape(thickness_difference, depth_difference=0){
   dished(depth_difference, $inverted_dish) {
-    /* %shape_hull(thickness_difference, depth_difference, $inverted_dish ? 2 : 0); */
-    color($primary_color) shape_hull(thickness_difference, depth_difference, $inverted_dish ? 2 : 0);
+    color($primary_color) shape_hull(thickness_difference, depth_difference, $inverted_dish ? 200 : 0);
   }
 }
 
-// shape of the key but with soft, rounded edges. no longer includes dish
-// randomly doesnt work sometimes
-// the dish doesn't _quite_ reach as far as it should
+// Not currently used due to CGAL errors. Rounds the shape via minkowski
 module rounded_shape() {
-  dished(-$minkowski_radius, $inverted_dish) {
-    color($primary_color) minkowski(){
-      // half minkowski in the z direction
-      color($primary_color) shape_hull($minkowski_radius * 2, $minkowski_radius/2, $inverted_dish ? 2 : 0);
-      /* cube($minkowski_radius); */
-      sphere(r=$minkowski_radius, $fn=$minkowski_facets);
-    }
-  }
-  /* %envelope(); */
-}
-
-// this function is more correct, but takes _forever_
-// the main difference is minkowski happens after dishing, meaning the dish is
-// also minkowski'd
-/* module rounded_shape() {
   color($primary_color) minkowski(){
     // half minkowski in the z direction
     shape($minkowski_radius * 2, $minkowski_radius/2);
-    difference(){
-      sphere(r=$minkowski_radius, $fn=20);
-      translate([0,0,-$minkowski_radius]){
-        cube($minkowski_radius * 2, center=true);
-      }
+    minkowski_object();
+  }
+}
+
+// minkowski places this object at every vertex of the other object then mashes
+// it all together
+module minkowski_object() {
+  // alternative minkowski shape that needs the bottom of the keycap to be trimmed
+  /* sphere(1); */
+
+  difference(){
+    sphere(r=$minkowski_radius, $fa=360/$minkowski_facets);
+    translate([0,0,-$minkowski_radius]){
+      cube($minkowski_radius * 2, center=true);
     }
   }
-} */
-
-
-
-// basic key shape, no dish, no inside
-// which is only used for dishing to cut the dish off correctly
-// $height_difference used for keytop thickness
-// extra_slices is a hack to make inverted dishes still work
-module shape_hull(thickness_difference, depth_difference, extra_slices = 0){
-  render() {
-    if ($skin_extrude_shape) {
-      skin_extrude_shape_hull(thickness_difference, depth_difference, extra_slices);
-    } else if ($linear_extrude_shape) {
-      linear_extrude_shape_hull(thickness_difference, depth_difference, extra_slices);
-    } else {
-      hull_shape_hull(thickness_difference, depth_difference, extra_slices);
-    }
-  }
-}
-
-// use skin() instead of successive hulls. much more correct, and looks faster
-// too, in most cases. successive hull relies on overlapping faces which are
-// not good. But, skin works on vertex sets instead of shapes, which makes it
-// a lot more difficult to use
-module skin_extrude_shape_hull(thickness_difference, depth_difference, extra_slices = 0 ) {
-  skin([
-    for (index = [0:$height_slices + extra_slices])
-      let(
-        progress = (index / $height_slices),
-        skew_this_slice = $top_skew * progress,
-        x_skew_this_slice = $top_skew_x * progress,
-        depth_this_slice = ($total_depth - depth_difference) * progress,
-        tilt_this_slice = -$top_tilt / $key_height * progress,
-        y_tilt_this_slice = $double_sculpted ? (-$top_tilt_y / $key_length * progress) : 0
-      )
-      skin_shape_slice(progress, thickness_difference, skew_this_slice, x_skew_this_slice, depth_this_slice, tilt_this_slice, y_tilt_this_slice)
-  ]);
-}
-
-function skin_shape_slice(progress, thickness_difference, skew_this_slice, x_skew_this_slice, depth_this_slice, tilt_this_slice, y_tilt_this_slice) =
-  transform(
-    translation([x_skew_this_slice,skew_this_slice,depth_this_slice]),
-    transform(
-      rotation([tilt_this_slice,y_tilt_this_slice,0]),
-        skin_key_shape([
-          total_key_width(0),
-          total_key_height(0),
-          ],
-          [$width_difference, $height_difference],
-          progress,
-          thickness_difference
-        )
-    )
-  );
-
-// corollary is hull_shape_hull
-// extra_slices unused, only to match argument signatures
-module linear_extrude_shape_hull(thickness_difference, depth_difference, extra_slices = 0){
-  height = $total_depth - depth_difference;
-  width_scale = top_total_key_width() / total_key_width();
-  height_scale = top_total_key_height() / total_key_height();
-
-  translate([0,$linear_extrude_height_adjustment,0]){
-    linear_extrude(height = height, scale = [width_scale, height_scale]) {
-        translate([0,-$linear_extrude_height_adjustment,0]){
-        key_shape(
-          [total_key_width(thickness_difference), total_key_height(thickness_difference)],
-          [$width_difference, $height_difference]
-        );
-      }
-    }
-  }
-}
-
-module hull_shape_hull(thickness_difference, depth_difference, extra_slices = 0) {
-  for (index = [0:$height_slices - 1 + extra_slices]) {
-    hull() {
-      shape_slice(index / $height_slices, thickness_difference, depth_difference);
-      shape_slice((index + 1) / $height_slices, thickness_difference, depth_difference);
-    }
-  }
-}
-
-module shape_slice(progress, thickness_difference, depth_difference) {
-  skew_this_slice = $top_skew * progress;
-  x_skew_this_slice = $top_skew_x * progress;
-
-  depth_this_slice = ($total_depth - depth_difference) * progress;
-
-  tilt_this_slice = -$top_tilt / $key_height * progress;
-  y_tilt_this_slice = $double_sculpted ? (-$top_tilt_y / $key_length * progress) : 0;
-
-  translate([x_skew_this_slice, skew_this_slice, depth_this_slice]) {
-    rotate([tilt_this_slice,y_tilt_this_slice,0]){
-      linear_extrude(height = SMALLEST_POSSIBLE){
-        key_shape(
-          [
-            total_key_width(thickness_difference),
-            total_key_height(thickness_difference)
-          ],
-          [$width_difference, $height_difference],
-          progress
-        );
-      }
-    }
-  }
-}
-
-// for when you want something to only exist inside the keycap.
-// used for the support structure
-module inside() {
-  intersection() {
-    shape($wall_thickness, $keytop_thickness);
-    children();
-  }
-}
-
-// for when you want something to only exist outside the keycap
-module outside() {
-  difference() {
-    children();
-    shape($wall_thickness, $keytop_thickness);
-  }
-}
-
-// put something at the top of the key, with no adjustments for dishing
-module top_placement(depth_difference=0) {
-  top_tilt_by_height = -$top_tilt / $key_height;
-  top_tilt_y_by_length = $double_sculpted ? (-$top_tilt_y / $key_length) : 0;
-
-  minkowski_height = $rounded_key ? $minkowski_radius : 0;
-
-  translate([$top_skew_x + $dish_skew_x, $top_skew + $dish_skew_y, $total_depth - depth_difference + minkowski_height/2]){
-    rotate([top_tilt_by_height, top_tilt_y_by_length,0]){
-      children();
-    }
-  }
-}
-
-module front_placement() {
-  // all this math is to take top skew and tilt into account
-  // we need to find the new effective height and depth of the top, front lip
-  // of the keycap to find the angle so we can rotate things correctly into place
-  total_depth_difference = sin(-$top_tilt) * (top_total_key_height()/2);
-  total_height_difference = $top_skew + (1 - cos(-$top_tilt)) * (top_total_key_height()/2);
-
-  angle = atan2(($total_depth - total_depth_difference), ($height_difference/2 + total_height_difference));
-  hypotenuse = ($total_depth -total_depth_difference) / sin(angle);
-
-  translate([0,-total_key_height()/2,0]) {
-    rotate([-(90-angle), 0, 0]) {
-      translate([0,0,hypotenuse/2]){
-        children();
-      }
-    }
-  }
-}
-
-// just to DRY up the code
-module _dish() {
-  translate([$dish_offset_x,0,0]) dish(top_total_key_width() + $dish_overdraw_width, top_total_key_height() + $dish_overdraw_height, $dish_depth, $inverted_dish);
 }
 
 module envelope(depth_difference=0) {
@@ -226,18 +57,6 @@ module envelope(depth_difference=0) {
   }
 }
 
-// I think this is unused
-module dished_for_show() {
-  difference(){
-    union() {
-      envelope();
-      if ($inverted_dish) top_placement(0) color($secondary_color) _dish();
-    }
-    if (!$inverted_dish) top_placement(0) color($secondary_color) _dish();
-  }
-}
-
-
 // for when you want to take the dish out of things
 // used for adding the dish to the key shape and making sure stems don't stick out the top
 // creates a bounding box 1.5 times larger in width and height than the keycap.
@@ -246,38 +65,24 @@ module dished(depth_difference = 0, inverted = false) {
     children();
     difference(){
       union() {
+        // envelope is needed to "fill in" the rest of the keycap
         envelope(depth_difference);
-        if (inverted) top_placement(depth_difference) color($secondary_color) _dish();
+        if (inverted) top_placement(depth_difference) color($secondary_color) _dish(inverted);
       }
-      if (!inverted) top_placement(depth_difference) color($secondary_color) _dish();
+      if (!inverted) top_placement(depth_difference) color($secondary_color) _dish(inverted);
       /* %top_placement(depth_difference) _dish(); */
     }
   }
 }
 
-// puts it's children at the center of the dishing on the key, including dish height
-// more user-friendly than top_placement
-module top_of_key(){
-  // if there is a dish, we need to account for how much it digs into the top
-  dish_depth = ($dish_type == "disable") ? 0 : $dish_depth;
-  // if the dish is inverted, we need to account for that too. in this case we do half, otherwise the children would be floating on top of the dish
-  corrected_dish_depth = ($inverted_dish) ? -dish_depth / 2 : dish_depth;
-
-  top_placement(corrected_dish_depth) {
-    children();
-  }
-}
-
-module keytext(text, position, font_size, depth) {
-  woffset = (top_total_key_width()/3.5) * position[0];
-  hoffset = (top_total_key_height()/3.5) * -position[1];
-  translate([woffset, hoffset, -depth]){
-    color($tertiary_color) linear_extrude(height=$dish_depth){
-      text(text=text, font=$font, size=font_size, halign="center", valign="center");
-    }
-  }
+// just to DRY up the code
+// TODO is putting special vars in function signatures legal
+module _dish(inverted=$inverted_dish) {
+  translate([$dish_offset_x,0,0]) color($secondary_color) 
+  dish(top_total_key_width() + $dish_overdraw_width, top_total_key_height() + $dish_overdraw_height, $dish_depth, inverted);
 }
 
+// puts its children at each keystem position provided
 module keystem_positions(positions) {
   for (connector_pos = positions) {
     translate(connector_pos) {
@@ -296,131 +101,156 @@ module support_for(positions, stem_type) {
 
 module stems_for(positions, stem_type) {
   keystem_positions(positions) {
-    color($tertiary_color) stem(stem_type, $total_depth, $stem_slop, $stem_throw);
+    color($tertiary_color) stem(stem_type, stem_height(), $stem_slop, $stem_throw);
     if ($stem_support_type != "disable") {
       color($quaternary_color) stem_support($stem_support_type, stem_type, $stem_support_height, $stem_slop);
     }
   }
 }
 
-// a fake cherry keyswitch, abstracted out to maybe replace with a better one later
-module cherry_keyswitch() {
-  union() {
-    hull() {
-      cube([15.6, 15.6, 0.01], center=true);
-      translate([0,1,5 - 0.01]) cube([10.5,9.5, 0.01], center=true);
-    }
-    hull() {
-      cube([15.6, 15.6, 0.01], center=true);
-      translate([0,0,-5.5]) cube([13.5,13.5,0.01], center=true);
+// put something at the top of the key, with no adjustments for dishing
+module top_placement(depth_difference=0) {
+  top_tilt_by_height = -$top_tilt / $key_height;
+  top_tilt_y_by_length = $double_sculpted ? (-$top_tilt_y / $key_length) : 0;
+
+  minkowski_height = $rounded_key ? $minkowski_radius : 0;
+
+  translate([$top_skew_x + $dish_skew_x, $top_skew + $dish_skew_y, $total_depth - depth_difference + minkowski_height/2]){
+    rotate([top_tilt_by_height, top_tilt_y_by_length,0]){
+      children();
     }
   }
 }
 
-//approximate (fully depressed) cherry key to check clearances
-module clearance_check() {
-  if($stem_type == "cherry" || $stem_type == "cherry_rounded"){
-    color($warning_color){
-      translate([0,0,3.6 + $stem_inset - 5]) {
-        cherry_keyswitch();
+// puts its children at the center of the dishing on the key, including dish height
+// more user-friendly than top_placement
+module top_of_key(){
+  // if there is a dish, we need to account for how much it digs into the top
+  dish_depth = ($dish_type == "disable") ? 0 : $dish_depth;
+  // if the dish is inverted, we need to account for that too. in this case we do half, otherwise the children would be floating on top of the dish
+  corrected_dish_depth = ($inverted_dish) ? -dish_depth / 2 : dish_depth;
+
+  top_placement(corrected_dish_depth) {
+    children();
+  }
+}
+
+module front_of_key() {
+  // all this math is to take top skew and tilt into account
+  // we need to find the new effective height and depth of the top, front lip
+  // of the keycap to find the angle so we can rotate things correctly into place
+  total_depth_difference = sin(-$top_tilt) * (top_total_key_height()/2);
+  total_height_difference = $top_skew + (1 - cos(-$top_tilt)) * (top_total_key_height()/2);
+
+  angle = atan2(($total_depth - total_depth_difference), ($height_difference/2 + total_height_difference));
+  hypotenuse = ($total_depth -total_depth_difference) / sin(angle);
+
+  translate([0,-total_key_height()/2,0]) {
+    rotate([-(90-angle), 0, 0]) {
+      translate([0,0,hypotenuse/2]){
+        children();
       }
     }
   }
 }
 
-module legends(depth=0) {
-  if (len($front_legends) > 0) {
-    front_placement() {
-      if (len($front_legends) > 0) {
-        for (i=[0:len($front_legends)-1]) {
-          rotate([90,0,0]) keytext($front_legends[i][0], $front_legends[i][1], $front_legends[i][2], depth);
-  		  }
-	    }
-    }
-  }
-  if (len($legends) > 0) {
-    top_of_key() {
-      // outset legend
-      if (len($legends) > 0) {
-        for (i=[0:len($legends)-1]) {
-          keytext($legends[i][0], $legends[i][1], $legends[i][2], depth);
-        }
-      }
-    }
+module outer_shape() {
+  if ($rounded_key == true) {
+    rounded_shape();
+  } else {
+    shape(0, 0);
   }
 }
 
-// legends / artisan support
-module artisan(depth) {
+module inner_shape(extra_wall_thickness = 0, extra_keytop_thickness = 0) {
+  if ($inner_shape_type == "flat") {
+    /* $key_shape_type="square"; */
+    $height_slices = 1;
+    // if inner_shape is flat, keytop_thickness will be dish_depth less than it should be, since the dish digs in that far.
+    // so, we add dish_depth here
+    color($primary_color) shape_hull($wall_thickness + extra_wall_thickness, $keytop_thickness + extra_keytop_thickness + $dish_depth, 0);
+  } else {
+    shape($wall_thickness + extra_wall_thickness, $keytop_thickness + extra_keytop_thickness);
+  }
+}
+
+// additive objects at the top of the key
+module additive_features(inset) {
   top_of_key() {
-    // artisan objects / outset shape legends
-    color($secondary_color) children();
+    if($key_bump) keybump($key_bump_depth, $key_bump_edge);
+    if(!inset && $children > 0) color($secondary_color) children();
+  }
+  if($outset_legends) legends(0);
+  // render the clearance check if it's enabled, but don't have it intersect with anything
+  if ($clearance_check) %clearance_check();
+}
+
+// subtractive objects at the top of the key
+module subtractive_features(inset) {
+  top_of_key() {
+    if (inset && $children > 0) color($secondary_color) children();
+  }
+  if(!$outset_legends) legends($inset_legend_depth);
+  // subtract the clearance check if it's enabled, letting the user see the
+  // parts of the keycap that will hit the cherry switch
+  // this is a little confusing as it eats the stem too
+  /* if ($clearance_check) clearance_check(); */
+}
+
+// features inside the key itself (stem, supports, etc)
+module inside_features() {
+  // Stems and stabilizers are not "inside features" unless they are fully
+  // contained inside the cap. otherwise they'd be cut off when they are
+  // differenced with the outside shape. this only matters if $stem_inset
+  // is negative
+  if ($stem_inset >= 0) stems_and_stabilizers();
+  if ($support_type != "disable") translate([0, 0, $stem_inset]) support_for($stem_positions, $stem_type);
+  if ($stabilizer_type != "disable") translate([0, 0, $stem_inset]) support_for($stabilizers, $stabilizer_type);
+}
+
+// all stems and stabilizers
+module stems_and_stabilizers() {
+  translate([0, 0, $stem_inset]) {
+    if ($stabilizer_type != "disable") stems_for($stabilizers, $stabilizer_type);
+    if ($stem_type != "disable") stems_for($stem_positions, $stem_type);
   }
 }
 
-// key with hollowed inside but no stem
-module hollow_key() {
-  difference(){
-    if ($rounded_key) {
-      rounded_shape();
-    } else {
-      shape(0, 0);
-    }
-    // translation purely for aesthetic purposes, to get rid of that awful lattice
-    translate([0,0,-SMALLEST_POSSIBLE]) {
-      shape($wall_thickness, $keytop_thickness);
-    }
+// helpers for doubleshot keycaps for now
+module inner_total_shape() {
+  difference() {
+    inner_shape();
+    inside_features();
   }
 }
 
+module outer_total_shape(inset=false) {
+  outer_shape();
+  additive_features(inset) {
+    children();
+  };
+}
 
 // The final, penultimate key generation function.
 // takes all the bits and glues them together. requires configuration with special variables.
-module key(inset = false) {
-  difference() {
-    union(){
-      // the shape of the key, inside and out
-      hollow_key();
-      if($key_bump) top_of_key() keybump($key_bump_depth, $key_bump_edge);
-      // additive objects at the top of the key
-      // outside() makes them stay out of the inside. it's a bad name
-      if(!inset && $children > 0) outside() artisan(0) children();
-      if($outset_legends) legends(0);
-      // render the clearance check if it's enabled, but don't have it intersect with anything
-      if ($clearance_check) %clearance_check();
-    }
+module key(inset=false) {
+  difference(){
+    outer_total_shape(inset);
 
-    // subtractive objects at the top of the key
-    // no outside() - I can't think of a use for it. will save render time
-    if (inset && $children > 0) artisan($inset_legend_depth) children();
-    if(!$outset_legends) legends($inset_legend_depth);
-    // subtract the clearance check if it's enabled, letting the user see the
-    // parts of the keycap that will hit the cherry switch
-    if ($clearance_check) %clearance_check();
-  }
-
-  // both stem and support are optional
-  if ($stem_type != "disable" || ($stabilizers != [] && $stabilizer_type != "disable")) {
-    dished($keytop_thickness, $inverted_dish) {
-      translate([0, 0, $stem_inset]) {
-        if ($stabilizer_type != "disable") stems_for($stabilizers, $stabilizer_type);
-
-        if ($stem_type != "disable") stems_for($stem_positions, $stem_type);
+    if ($inner_shape_type != "disable") {
+      translate([0,0,-SMALLEST_POSSIBLE]) {
+        inner_total_shape();
       }
     }
+
+    subtractive_features(inset) {
+      children();
+    };
   }
 
-  if ($support_type != "disable"){
-    inside() {
-      translate([0, 0, $stem_inset]) {
-        if ($stabilizer_type != "disable") support_for($stabilizers, $stabilizer_type);
-
-        // always render stem support even if there isn't a stem.
-        // rendering flat support w/no stem is much more common than a hollow keycap
-        // so if you want a hollow keycap you'll have to turn support off entirely
-        support_for($stem_positions, $stem_type);
-      }
-    }
+  // if $stem_inset is less than zero, we add the
+  if ($stem_inset < 0) {
+    stems_and_stabilizers();
   }
 }
 

src/key_profiles.scad

@@ -9,6 +9,7 @@ include <key_profiles/sa.scad>
 include <key_profiles/g20.scad>
 include <key_profiles/hipro.scad>
 include <key_profiles/grid.scad>
+include <key_profiles/regular_polygon.scad>
 include <key_profiles/cherry.scad>
 include <key_profiles/dss.scad>
 
@@ -30,6 +31,10 @@ module key_profile(key_profile_type, row, column=0) {
     hipro_row(row, column) children();
   } else if (key_profile_type == "grid") {
     grid_row(row, column) children();
+  } else if (key_profile_type == "hexagon") {
+    hexagonal_row(row, column) children();
+  } else if (key_profile_type == "octagon") {
+    octagonal_row(row, column) children();
   } else if (key_profile_type == "cherry") {
     cherry_row(row, column) children();
   } else if (key_profile_type == "disable") {

src/key_profiles/grid.scad

@@ -11,7 +11,7 @@ module grid_row(row=3, column = 0) {
   $dish_skew_x = 0;
   $dish_skew_y = 0;
 
-  $linear_extrude_shape = true;
+  $hull_shape_type = "linear extrude";
 
 
   $dish_overdraw_width = -6.5;

src/key_profiles/regular_polygon.scad

@@ -0,0 +1,66 @@
+include <../constants.scad>
+// Regular polygon shapes CIRCUMSCRIBE the sphere of diameter $bottom_key_width
+// This is to make tiling them easier, like in the case of hexagonal keycaps etc
+
+// this function doesn't set the key shape, so you can't use it directly without some fiddling
+module regular_polygon_row(n=3, column=0) {
+  $bottom_key_width = $unit - 0.5;
+  $bottom_key_height = $unit - 0.5;
+  $width_difference = 0;
+  $height_difference = 0;
+  $dish_type = "spherical";
+  $dish_depth = 0.85;
+  $dish_skew_x = 0;
+  $dish_skew_y = 0;
+  $top_skew = 0;
+  $height_slices = 1;
+  $corner_radius = 1;
+
+  // this is _incredibly_ intensive
+  /* $rounded_key = true; */
+
+  $top_tilt_y = side_tilt(column);
+  extra_height = $double_sculpted ? extra_side_tilt_height(column) : 0;
+
+  base_depth = 7.5;
+  if (n <= 1){
+    $total_depth = base_depth + 2.5 + extra_height;
+    $top_tilt = -13;
+
+    children();
+  } else if (n == 2) {
+    $total_depth = base_depth + 0.5 + extra_height;
+    $top_tilt = -7;
+
+    children();
+  } else if (n == 3) {
+    $total_depth = base_depth + extra_height;
+    $top_tilt = 0;
+
+    children();
+  } else if (n == 4){
+    $total_depth = base_depth + 0.5 + extra_height;
+    $top_tilt = 7;
+
+    children();
+  } else {
+    $total_depth = base_depth + extra_height;
+    $top_tilt = 0;
+
+    children();
+  }
+}
+
+module hexagonal_row(n=3, column=0) {
+  $key_shape_type = "hexagon";
+  regular_polygon_row(n,column) {
+    children();
+  }
+}
+
+module octagonal_row(n=3, column=0) {
+  $key_shape_type = "octagon";
+  regular_polygon_row(n, column) {
+    children();
+  }
+}

src/key_transformations.scad

@@ -1,10 +1,9 @@
 // kind of a catch-all at this point for any directive that doesn't fit in the other files
 
-//TODO duplicate def to not make this a special var. maybe not worth it
-unit = 19.05;
+include <constants.scad>
 
 module translate_u(x=0, y=0, z=0){
-  translate([x * unit, y*unit, z*unit]) children();
+  translate([x * $unit, y*$unit, z*$unit]) children();
 }
 
 module no_stem_support() {
@@ -92,30 +91,58 @@ module blank() {
   children();
 }
 
-module cherry(slop) {
-  $stem_slop = slop ? slop : $stem_slop;
+module cherry(slop = undef) {
+  $stem_slop = slop != undef ? slop : $stem_slop;
   $stem_type = "cherry";
   children();
 }
 
-module alps(slop) {
-  $stem_slop = slop ? slop : $stem_slop;
+module alps(slop = undef) {
+  $stem_slop = slop != undef ? slop : $stem_slop;
   $stem_type = "alps";
   children();
 }
 
-module rounded_cherry(slop) {
-  $stem_slop = slop ? slop : $stem_slop;
+module rounded_cherry(slop = undef) {
+  $stem_slop = slop != undef ? slop : $stem_slop;
   $stem_type = "rounded_cherry";
   children();
 }
 
-module box_cherry(slop) {
-  $stem_slop = slop ? slop : $stem_slop;
+module box_cherry(slop = undef) {
+  $stem_slop = slop != undef ? slop : $stem_slop;
   $stem_type = "box_cherry";
   children();
 }
 
+module choc(slop = 0.05) {
+  echo("WARN:\n\n * choc support is experimental.\n * $stem_slop is overridden.\n * it is also recommended to print them upside down if you can\n\n");
+  $stem_throw = 3;
+  $stem_slop = slop;
+
+  $bottom_key_width = 18;
+  $bottom_key_height = 17;
+
+  $stem_type = "choc";
+  children();
+}
+
+// a hacky way to make "low profile" keycaps
+module low_profile() {
+  $width_difference = $width_difference / 1.5;
+  $height_difference = $height_difference / 1.5;
+  // helps tilted keycaps not have holes if worst comes to worst
+  $inner_shape_type = "dished";
+
+  $top_tilt = $top_tilt / 1.25;
+
+  $total_depth = ($total_depth / 2) < 7 ? 7 : $total_depth / 2;
+
+  // just to make sure
+  $stem_throw = 3;
+  children();
+}
+
 module flared_support() {
   $support_type = "flared";
   children();
@@ -183,3 +210,16 @@ module debug() {
 
   %children();
 }
+
+// auto-place children in a grid.
+// For this to work all children have to be single keys, no for loops etc
+module auto_place() {
+  num_children = $children;
+  row_size = round(pow(num_children, 0.5));
+
+  for (child_index = [0:num_children-1]) {
+    x = child_index % row_size;
+    y = floor(child_index / row_size);
+    translate_u(x,-y) children(child_index);
+  }
+}

src/key_types.scad

@@ -1,8 +1,8 @@
 include <functions.scad>
 
 module spacebar() {
-  $inverted_dish = true;
-  $dish_type = "sideways cylindrical";
+  $inverted_dish = $dish_type != "disable";
+  $dish_type = $dish_type != "disable" ? "sideways cylindrical" : "disable";
   6_25u() stabilized(mm=50) children();
 }
 
@@ -50,13 +50,14 @@ module iso_enter() {
   /* $top_tilt = 0; */
   $stem_support_type = "disable";
   $key_shape_type = "iso_enter";
-  /* $linear_extrude_shape = true; */
+  $hull_shape_type = "skin";
   $linear_extrude_height_adjustment = 19.05 * 0.5;
   // this equals (unit_length(1.5) - unit_length(1.25)) / 2
   /* $dish_overdraw_width = 2.38125; */
 
-
-  stabilized(vertical=true) {
-    children();
+  render() {
+    stabilized(vertical=true) {
+      children();
+    }
   }
 }

src/layouts/lets_split/default.scad

@@ -1,7 +1,7 @@
 include <../layout.scad>
 
 // negative numbers are used for spacing
-lets_split_mapping = [
+lets_split_layout = [
   [1, 1, 1, 1, 1, 1, -1, 1, 1, 1, 1, 1, 1],
   [1, 1, 1, 1, 1, 1, -1, 1, 1, 1, 1, 1, 1],
   [1, 1, 1, 1, 1, 1, -1, 1, 1, 1, 1, 1, 1],
@@ -9,5 +9,5 @@ lets_split_mapping = [
 ];
 
 module lets_split_default(profile) {
-  layout(lets_split_mapping, profile, row_sculpting_offset=1) children();
+  layout(lets_split_layout, profile, row_sculpting_offset=1) children();
 }

src/settings.scad

@@ -74,14 +74,11 @@ $rounded_cherry_stem_d = 5.5;
 
 // How much higher the stem is than the bottom of the keycap.
 // Inset stem requires support but is more accurate in some profiles
+// can be negative to make outset stems!
 $stem_inset = 0;
 // How many degrees to rotate the stems. useful for sideways keycaps, maybe
 $stem_rotation = 0;
 
-// enable to have stem support extend past the keycap bottom, to (hopefully) the next
-// keycap. only works on tines right now
-$extra_long_stem_support = false;
-
 /* [Shape] */
 
 // Key shape type, determines the shape of the key. default is 'rounded square'
@@ -122,12 +119,10 @@ $font="DejaVu Sans Mono:style=Book";
 // Whether or not to render fake keyswitches to check clearances
 $clearance_check = false;
 // Should be faster, also required for concave shapes
-// Use linear_extrude instead of hull slices to make the shape of the key
-$linear_extrude_shape = false;
 
-// warns in trajectory.scad but it looks benign
-// brand new, more correct, hopefully faster, lots more work
-$skin_extrude_shape = false;
+// what kind of extrusion we use to create the keycap. "hull" is standard, "linear extrude" is legacy, "skin" is new and not well supported.
+$hull_shape_type = "hull"; // ["hull", "linear extrude", "skin"]
+
 // This doesn't work very well, but you can try
 $rounded_key = false;
 //minkowski radius. radius of sphere used in minkowski sum for minkowski_key function. 1.75 for G20
@@ -168,6 +163,9 @@ $inset_legend_depth = 0.2;
 // Dimensions of alps stem
 $alps_stem = [4.45, 2.25];
 
+// Dimensions of choc stem
+$choc_stem = [1.2, 3];
+
 // Enable stabilizer stems, to hold onto your cherry or costar stabilizers
 $stabilizer_type = "costar_stabilizer"; // [costar_stabilizer, cherry_stabilizer, disable]
 
@@ -197,3 +195,6 @@ $shape_facets =30;
 $3d_surface_size = 100;
 // resolution in each axis. 10 = 10 divisions per x/y = 100 points total
 $3d_surface_step = 10;
+
+// "flat" / "dished" / "disable"
+$inner_shape_type = "flat";

src/shapes.scad

@@ -1,11 +1,10 @@
-$fs=.1;
-unit = 19.05;
-
+include <constants.scad>
 include <shapes/ISO_enter.scad>
 include <shapes/sculpted_square.scad>
 include <shapes/rounded_square.scad>
 include <shapes/square.scad>
 include <shapes/oblong.scad>
+include <shapes/regular_polygon.scad>
 
 // size: at progress 0, the shape is supposed to be this size
 // delta: at progress 1, the keycap is supposed to be size - delta
@@ -25,6 +24,10 @@ module key_shape(size, delta, progress = 0) {
     square_shape(size, delta, progress);
   } else if ($key_shape_type == "oblong") {
     oblong_shape(size, delta, progress);
+  } else if ($key_shape_type == "hexagon") {
+    regular_polygon_shape(size, delta, progress);
+  } else if ($key_shape_type == "octagon") {
+    regular_polygon_shape(size, delta, progress, sides=8);
   } else {
     echo("Warning: unsupported $key_shape_type");
   }

src/shapes/ISO_enter.scad

@@ -5,6 +5,7 @@ width_ratio = unit_length(1.25) / unit_length(1.5);
 height_ratio = unit_length(1) / unit_length(2);
 
 
+
 module ISO_enter_shape(size, delta, progress){
   width = size[0];
   height = size[1];
@@ -37,12 +38,12 @@ module ISO_enter_shape(size, delta, progress){
 }
 
 function iso_enter_vertices(size, delta, progress, thickness_difference) = [
-  [                       0-delta.x/2 * progress - thickness_difference/2,                      0 - delta.y / 2 * progress - thickness_difference/2], // top right
-  [                       0-delta.x/2 * progress - thickness_difference/2,               -size[1] + delta.y / 2 * progress + thickness_difference/2], // bottom right
-  [-size[0] * width_ratio + delta.x/2 * progress + thickness_difference/2,               -size[1] + delta.y / 2 * progress + thickness_difference/2], // bottom left
-  [-size[0] * width_ratio + delta.x/2 * progress + thickness_difference/2,-size[1] * height_ratio + delta.y / 2 * progress + thickness_difference/2], // inner middle point
-  [              -size[0] + delta.x/2 * progress + thickness_difference/2,-size[1] * height_ratio + delta.y / 2 * progress + thickness_difference/2], // outer middle point
-  [              -size[0] + delta.x/2 * progress + thickness_difference/2,                      0 - delta.y / 2 * progress - thickness_difference/2]  // top left
+  [                       0-delta.x/2 * progress - thickness_difference/8,                      0 - delta.y / 2 * progress - thickness_difference/8], // top right
+  [                       0-delta.x/2 * progress - thickness_difference/8,               -size[1] + delta.y / 2 * progress + thickness_difference/8], // bottom right
+  [-size[0] * width_ratio + delta.x/2 * progress + thickness_difference/8,               -size[1] + delta.y / 2 * progress + thickness_difference/8], // bottom left
+  [-size[0] * width_ratio + delta.x/2 * progress + thickness_difference/8,-size[1] * height_ratio + delta.y / 2 * progress + thickness_difference/2], // inner middle point
+  [              -size[0] + delta.x/2 * progress + thickness_difference/8,-size[1] * height_ratio + delta.y / 2 * progress + thickness_difference/2], // outer middle point
+  [              -size[0] + delta.x/2 * progress + thickness_difference/8,                      0 - delta.y / 2 * progress - thickness_difference/8]  // top left
 ] + [
   [(size[0] * width_ratio)/2, size[1]/2 ],
   [(size[0] * width_ratio)/2, size[1]/2 ],

src/shapes/regular_polygon.scad

@@ -0,0 +1,14 @@
+// we do this weird key_shape_type check here because rounded_square uses
+// square_shape, and we want flat sides to work for that too.
+// could be refactored, idk
+module regular_polygon_shape(size, delta, progress, sides=6){
+  // https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/undersized_circular_objects
+  fudge = 1/cos(180/sides);
+  diameter = (size.x - delta.x * progress - $corner_radius*2) * fudge;
+  offset(r=$corner_radius) rotate([0,0,360/sides/2]) circle(d = diameter, $fn=sides);
+}
+
+
+
+// TODO not implemented
+function skin_regular_polygon_shape(size, delta, progress, thickness_difference, sides=6) = echo("skin regular polygon not implemented");

src/shapes/sculpted_square.scad

@@ -1,18 +1,18 @@
 // rounded square shape with additional sculpting functions to better approximate
 
 // When sculpting sides, how much in should the tops come
-$side_sculpting_factor = 4.5;
+side_sculpting_factor = 4.5;
 // When sculpting corners, how much extra radius should be added
-$corner_sculpting_factor = 1;
+corner_sculpting_factor = 1;
 // When doing more side sculpting corners, how much extra radius should be added
-$more_side_sculpting_factor = 0.4;
+more_side_sculpting_factor = 0.4;
 
 
 // side sculpting functions
 // bows the sides out on stuff like SA and DSA keycaps
-function side_sculpting(progress) = (1 - progress) * $side_sculpting_factor;
+function side_sculpting(progress) = (1 - progress) * side_sculpting_factor;
 // makes the rounded corners of the keycap grow larger as they move upwards
-function corner_sculpting(progress) = pow(progress, 2) * $corner_sculpting_factor;
+function corner_sculpting(progress) = pow(progress, 2) * corner_sculpting_factor;
 
 module sculpted_square_shape(size, delta, progress) {
   width = size[0];
@@ -37,7 +37,7 @@ module sculpted_square_shape(size, delta, progress) {
 
   offset(r = extra_corner_radius_this_slice, $fa=360/$shape_facets) {
     offset(r = -extra_corner_radius_this_slice) {
-      side_rounded_square(square_size, r = $more_side_sculpting_factor * progress);
+      side_rounded_square(square_size, r = more_side_sculpting_factor * progress);
     }
   }
 }
@@ -92,7 +92,7 @@ function skin_sculpted_square_shape(size, delta, progress, thickness_difference)
       width - extra_width_this_slice - thickness_difference,
       height - extra_height_this_slice - thickness_difference
     ]
-  ) new_side_rounded_square(square_size, $more_side_sculpting_factor * progress, extra_corner_radius_this_slice);
+  ) new_side_rounded_square(square_size, more_side_sculpting_factor * progress, extra_corner_radius_this_slice);
 
 
 module side_rounded_square(size, r) {

src/stem_supports/brim.scad

@@ -16,12 +16,12 @@ module brim_support(stem_type, stem_support_height, slop) {
         }
       }
 
-      inside_cherry_cross(slop);
+      inside_cherry_cross($stem_inner_slop);
     }
   } else if (stem_type == "rounded_cherry") {
     difference() {
       cylinder(d=$rounded_cherry_stem_d * 2, h=stem_support_height);
-      inside_cherry_cross(slop);
+      inside_cherry_cross($stem_inner_slop);
     }
   } else if (stem_type == "box_cherry") {
     difference() {
@@ -31,7 +31,7 @@ module brim_support(stem_type, stem_support_height, slop) {
         }
       }
 
-      inside_cherry_cross(slop);
+      inside_cherry_cross($stem_inner_slop);
     }
   } else if (stem_type == "cherry_stabilizer") {
     difference() {
@@ -41,7 +41,19 @@ module brim_support(stem_type, stem_support_height, slop) {
         }
       }
 
-      inside_cherry_cross(slop);
+      inside_cherry_cross($stem_inner_slop);
+    }
+  } else if(stem_type == "choc") {
+    translate([-5.7/2,0,0]) linear_extrude(height=stem_support_height) {
+      offset(r=1){
+        square($choc_stem + [3,3], center=true);
+      }
+    }
+
+    translate([5.7/2,0,0]) linear_extrude(height=stem_support_height) {
+      offset(r=1){
+        square($choc_stem + [3,3], center=true);
+      }
     }
   }
 }

src/stem_supports/tines.scad

@@ -1,17 +1,20 @@
 include <../functions.scad>
 include <../stems/cherry.scad>
 
+/* NOTE: every reference to total_key_width and total_key_height
+ * is multiplied by two in order to account for offset stems
+ */ 
 module centered_tines(stem_support_height) {
   if ($key_length < 2) {
     translate([0,0,$stem_support_height / 2]) {
-      cube([total_key_width(), 0.5, $stem_support_height], center = true);
+      cube([total_key_width()*2, 0.5, $stem_support_height], center = true);
     }
   }
 
   translate([0,0,$stem_support_height / 2]) {
     cube([
       1,
-      total_key_height(),
+      total_key_height()*2,
       $stem_support_height
     ],
     center = true);
@@ -19,16 +22,13 @@ module centered_tines(stem_support_height) {
 }
 
 module tines_support(stem_type, stem_support_height, slop) {
-  extra_height = $extra_long_stem_support ? ($unit - total_key_height()) + 0.1 : -$wall_thickness/4; // fudge
-  extra_width = $extra_long_stem_support ? ($unit - total_key_width()) + 0.1 : -$wall_thickness/4;
-
   if (stem_type == "cherry" || stem_type == "costar_stabilizer") {
     difference () {
       union() {
         if ($key_length < 2) {
           translate([0,0,$stem_support_height / 2]) {
             cube([
-              total_key_width() + extra_width*2,
+              total_key_width()*2,
               0.5,
               $stem_support_height
             ], center = true);
@@ -40,14 +40,14 @@ module tines_support(stem_type, stem_support_height, slop) {
           translate([x,0,$stem_support_height / 2]) {
             cube([
               0.5,
-              total_key_height() + extra_height*2, // this is to extend past
+              total_key_height()*2, // this is to extend past
               $stem_support_height
             ], center = true);
           }
         }
       }
 
-      inside_cherry_cross(slop);
+      inside_cherry_cross($stem_inner_slop);
     }
   } else if (stem_type == "cherry_stabilizer") {
     difference () {
@@ -55,7 +55,7 @@ module tines_support(stem_type, stem_support_height, slop) {
         translate([x,0,$stem_support_height / 2]) {
           cube([
             1,
-            total_key_height($wall_thickness),
+            total_key_height()*2,
             $stem_support_height
           ], center = true);
         }
@@ -67,15 +67,19 @@ module tines_support(stem_type, stem_support_height, slop) {
     difference () {
       centered_tines(stem_support_height);
 
-      inside_cherry_cross(slop);
+      inside_cherry_cross($stem_inner_slop);
     }
   } else if (stem_type == "rounded_cherry") {
     difference () {
       centered_tines(stem_support_height);
 
-      inside_cherry_cross(slop);
+      inside_cherry_cross($stem_inner_slop);
     }
   } else if (stem_type == "alps"){
     centered_tines(stem_support_height);
+  } else if (stem_type == "choc"){
+    if ($key_length < 2) translate([0,0,$stem_support_height / 2]) cube([total_key_width(), 0.42, $stem_support_height], center = true);
+    /* translate([-5.7/2,0,$stem_support_height / 2]) cube([0.5, total_key_height(), $stem_support_height], center = true); */
+    /* translate([5.7/2,0,$stem_support_height / 2]) cube([0.5, total_key_height(), $stem_support_height], center = true); */
   }
 }

src/stems.scad

@@ -4,7 +4,7 @@ include <stems/box_cherry.scad>
 include <stems/alps.scad>
 include <stems/filled.scad>
 include <stems/cherry_stabilizer.scad>
-include <stems/custom.scad>
+include <stems/choc.scad>
 
 
 //whole stem, alps or cherry, trimmed to fit
@@ -21,6 +21,8 @@ module stem(stem_type, depth, slop, throw){
       filled_stem();
     } else if (stem_type == "cherry_stabilizer") {
       cherry_stabilizer_stem(depth, slop, throw);
+    } else if (stem_type == "choc") {
+      choc_stem(depth, slop, throw);
     } else if (stem_type == "disable") {
       children();
     } else {

src/stems/box_cherry.scad

@@ -11,6 +11,6 @@ module box_cherry_stem(depth, slop, throw) {
     }
 
     // inside cross
-    inside_cherry_cross(slop);
+    inside_cherry_cross($stem_inner_slop);
   }
 }

src/stems/cherry_stabilizer.scad

@@ -4,11 +4,11 @@ include <../functions.scad>
 // splits the stem into halves - allows easier fitment
 extra_vertical = 0.6;
 
-module inside_cherry_stabilizer_cross(slop) {
+module inside_cherry_stabilizer_cross(slop, throw) {
   // inside cross
   // translation purely for aesthetic purposes, to get rid of that awful lattice
   translate([0,0,-SMALLEST_POSSIBLE]) {
-    linear_extrude(height = $stem_throw) {
+    linear_extrude(height = throw) {
       square(cherry_cross(slop, extra_vertical)[0], center=true);
       square(cherry_cross(slop, extra_vertical)[1], center=true);
     }
@@ -24,6 +24,6 @@ module cherry_stabilizer_stem(depth, slop, throw) {
       }
     }
 
-    inside_cherry_stabilizer_cross(slop);
+    inside_cherry_stabilizer_cross(slop, throw);
   }
 }

src/stems/choc.scad

@@ -0,0 +1,17 @@
+separation = 5.7;
+
+positions = [
+  [separation/2, 0],
+  [-separation/2, 0],
+];
+
+// TODO throw not used
+module choc_stem(depth, slop, throw){ 
+  for (position=positions) {
+    translate([position.x,position.y, depth/2]) single_choc_stem(depth, slop);
+  }
+}
+
+module single_choc_stem(depth, slop) {
+  cube([$choc_stem.x - slop, $choc_stem.y - slop, depth], center=true);
+}

src/stems/rounded_cherry.scad

@@ -7,6 +7,6 @@ module rounded_cherry_stem(depth, slop, throw) {
 
     // inside cross
     // translation purely for aesthetic purposes, to get rid of that awful lattice
-    inside_cherry_cross(slop);
+    inside_cherry_cross($stem_inner_slop);
   }
 }

src/supports/flared.scad

@@ -40,6 +40,14 @@ module flared(stem_type, loft, height) {
           square(outer_cherry_stabilizer_stem($stem_slop) - [2,2], center=true);
         }
       }
+    } else if (stem_type == "choc") {
+      // single support, just the stem
+      new_choc_scale = [scale_for_45(height, $choc_stem[0] + 5.7 - $stem_slop), scale_for_45(height, $choc_stem[1])];
+      translate([0,0,0]) linear_extrude(height=height, scale = new_choc_scale){
+        // TODO make a choc_stem() function so it can build in the slop
+        square([$choc_stem[0] + 5.7 - $stem_slop, $choc_stem[1] - $stem_slop], center=true);
+      }
+
     } else {
       // always render cherry if no stem type. this includes stem_type = false!
       // this avoids a bug where the keycap is rendered filled when not desired

yarn.lock

@@ -445,12 +445,12 @@ copy-descriptor@^0.1.0:
   integrity sha1-Z29us8OZl8LuGsOpJP1hJHSPV40=
 
 copy-props@^2.0.1:
-  version "2.0.4"
-  resolved "https://registry.yarnpkg.com/copy-props/-/copy-props-2.0.4.tgz#93bb1cadfafd31da5bb8a9d4b41f471ec3a72dfe"
-  integrity sha512-7cjuUME+p+S3HZlbllgsn2CDwS+5eCCX16qBgNC4jgSTf49qR1VKy/Zhl400m0IQXl/bPGEVqncgUUMjrr4s8A==
+  version "2.0.5"
+  resolved "https://registry.yarnpkg.com/copy-props/-/copy-props-2.0.5.tgz#03cf9ae328d4ebb36f8f1d804448a6af9ee3f2d2"
+  integrity sha512-XBlx8HSqrT0ObQwmSzM7WE5k8FxTV75h1DX1Z3n6NhQ/UYYAvInWYmG06vFt7hQZArE2fuO62aihiWIVQwh1sw==
   dependencies:
-    each-props "^1.3.0"
-    is-plain-object "^2.0.1"
+    each-props "^1.3.2"
+    is-plain-object "^5.0.0"
 
 core-util-is@~1.0.0:
   version "1.0.2"
@@ -538,7 +538,7 @@ duplexify@^3.6.0:
     readable-stream "^2.0.0"
     stream-shift "^1.0.0"
 
-each-props@^1.3.0:
+each-props@^1.3.2:
   version "1.3.2"
   resolved "https://registry.yarnpkg.com/each-props/-/each-props-1.3.2.tgz#ea45a414d16dd5cfa419b1a81720d5ca06892333"
   integrity sha512-vV0Hem3zAGkJAyU7JSjixeU66rwdynTAa1vofCrSA5fEln+m67Az9CcnkVD776/fsN/UjIWmBDoNRS6t6G9RfA==
@@ -1013,9 +1013,9 @@ homedir-polyfill@^1.0.1:
     parse-passwd "^1.0.0"
 
 hosted-git-info@^2.1.4:
-  version "2.8.8"
-  resolved "https://registry.yarnpkg.com/hosted-git-info/-/hosted-git-info-2.8.8.tgz#7539bd4bc1e0e0a895815a2e0262420b12858488"
-  integrity sha512-f/wzC2QaWBs7t9IYqB4T3sR1xviIViXJRJTWBlx2Gf3g0Xi5vI7Yy4koXQ1c9OYDGHN9sBy1DQ2AB8fqZBWhUg==
+  version "2.8.9"
+  resolved "https://registry.yarnpkg.com/hosted-git-info/-/hosted-git-info-2.8.9.tgz#dffc0bf9a21c02209090f2aa69429e1414daf3f9"
+  integrity sha512-mxIDAb9Lsm6DoOJ7xH+5+X4y1LU/4Hi50L9C5sIswK3JzULS4bwk1FvjdBgvYR4bzT4tuUQiC15FE2f5HbLvYw==
 
 inflight@^1.0.4:
   version "1.0.6"
@@ -1178,6 +1178,11 @@ is-plain-object@^2.0.1, is-plain-object@^2.0.3, is-plain-object@^2.0.4:
   dependencies:
     isobject "^3.0.1"
 
+is-plain-object@^5.0.0:
+  version "5.0.0"
+  resolved "https://registry.yarnpkg.com/is-plain-object/-/is-plain-object-5.0.0.tgz#4427f50ab3429e9025ea7d52e9043a9ef4159344"
+  integrity sha512-VRSzKkbMm5jMDoKLbltAkFQ5Qr7VDiTFGXxYFXXowVj387GeGNOCsOH6Msy00SGZ3Fp84b1Naa1psqgcCIEP5Q==
+
 is-relative@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/is-relative/-/is-relative-1.0.0.tgz#a1bb6935ce8c5dba1e8b9754b9b2dcc020e2260d"
@@ -1624,9 +1629,9 @@ path-is-absolute@^1.0.0:
   integrity sha1-F0uSaHNVNP+8es5r9TpanhtcX18=
 
 path-parse@^1.0.6:
-  version "1.0.6"
-  resolved "https://registry.yarnpkg.com/path-parse/-/path-parse-1.0.6.tgz#d62dbb5679405d72c4737ec58600e9ddcf06d24c"
-  integrity sha512-GSmOT2EbHrINBf9SR7CDELwlJ8AENk3Qn7OikK4nFYAu3Ote2+JYNVvkpAEQm3/TLNEJFD/xZJjzyxg3KBWOzw==
+  version "1.0.7"
+  resolved "https://registry.yarnpkg.com/path-parse/-/path-parse-1.0.7.tgz#fbc114b60ca42b30d9daf5858e4bd68bbedb6735"
+  integrity sha512-LDJzPVEEEPR+y48z93A0Ed0yXb8pAByGWo/k5YYdYgpY2/2EsOsksJrq7lOHxryrVOn1ejG6oAp8ahvOIQD8sw==
 
 path-root-regex@^0.1.0:
   version "0.1.2"
@@ -2348,9 +2353,9 @@ xtend@~4.0.0, xtend@~4.0.1:
   integrity sha512-LKYU1iAXJXUgAXn9URjiu+MWhyUXHsvfp7mcuYm9dSUKK0/CjtrUwFAxD82/mCWbtLsGjFIad0wIsod4zrTAEQ==
 
 y18n@^3.2.1:
-  version "3.2.1"
-  resolved "https://registry.yarnpkg.com/y18n/-/y18n-3.2.1.tgz#6d15fba884c08679c0d77e88e7759e811e07fa41"
-  integrity sha1-bRX7qITAhnnA136I53WegR4H+kE=
+  version "3.2.2"
+  resolved "https://registry.yarnpkg.com/y18n/-/y18n-3.2.2.tgz#85c901bd6470ce71fc4bb723ad209b70f7f28696"
+  integrity sha512-uGZHXkHnhF0XeeAPgnKfPv1bgKAYyVvmNL1xlKsPYZPaIHxGti2hHqvOCQv71XMsLxu1QjergkqogUnms5D3YQ==
 
 yargs-parser@^5.0.0:
   version "5.0.1"