>The word Atreides refers to one of the sons of Atreus—Agamemnon and Menelaus. The plural form Atreidae or Atreidai refers to both sons collectively; in English, the form Atreides (the same form as the singular) is often used.
## Case
-The case design is written in OpenSCAD with the intention of 3D printing or laser cutting it, and is easily tweakable to your liking with the variables included in the top of the file.
+The case design is written in OpenSCAD with the intention of laser cutting it, and is easily tweakable to your liking with the variables included in the top of the file. The main parameters are:
+ - `angle`, one half of the angle between the left and the right groups of keys
+ - `n_rows`, `n_cols`, number of rows and columns to use
+ - `staggering_offsets`, column staggering offsets
+ - `cable_hole_width`, width of the hole for the USB cable
+ - `hand_separation`, distance between the left and the right groups of keys
+ - `screw_hole_radius`, radius of screw holes
+ - `use_notched_holes` (boolean), whether notched Cherry MX switch holes are desired
+
+See the comments in `atreides_case.scad` for details.
+
+To use, open this script in OpenSCAD, select **Compile and Render (CGAL)** in the **Design** menu, then select **Export as DXF...**.
Wood cases should be finished with sandpaper and lacquer, shellac, or polyurethane.
--- /dev/null
+// -*- mode: c -*-
+/* All distances are in mm. */
+
+/* set output quality */
+$fn = 50;
+
+/* Distance between key centers. */
+column_spacing = 19;
+row_spacing = column_spacing;
+
+/* This number should exceed row_spacing and column_spacing. The
+ default gives a 1mm = (20mm - 19mm) gap between keycaps and cuts in
+ the top plate.*/
+key_hole_size = 20;
+
+/* rotation angle; the angle between the halves is twice this
+ number */
+angle = 10;
+
+/* The radius of screw holes. Holes will be slightly bigger due
+ to the cut width. */
+screw_hole_radius = 1.5;
+/* Each screw hole is a hole in a "washer". How big these "washers"
+ should be depends on the material used: this parameter and the
+ `switch_hole_size` determine the spacer wall thickness. */
+washer_radius = 4 * screw_hole_radius;
+
+/* This constant allows tweaking the location of the screw holes near
+ the USB cable. Only useful with small `angle` values. Try the value
+ of 10 with angle=0. */
+back_screw_hole_offset = 0;
+
+/* Distance between halves. */
+hand_separation = 0;
+
+/* The approximate size of switch holes. Used to determine how
+ thick walls can be, i.e. how much room around each switch hole to
+ leave. See spacer(). */
+switch_hole_size = 14;
+
+/* Sets whether the case should use notched holes. As far as I can
+ tell these notches are not all that useful... */
+use_notched_holes = true;
+
+/* Number of rows and columns in the matrix. You need to update
+ staggering_offsets if you change n_cols. */
+n_rows = 4;
+n_cols = 5;
+
+/* Number of thumb keys (per hand), try 1 or 2. */
+n_thumb_keys = 1;
+
+/* The width of the USB cable hole in the spacer. */
+cable_hole_width = 12;
+
+/* Vertical column staggering offsets. The first element should
+ be zero. */
+staggering_offsets = [0, 5, 11, 6, 3];
+
+/* Whether or not to split the spacer into quarters. */
+quarter_spacer = false;
+
+/* Where the top/bottom split of a quartered spacer will be. */
+spacer_quartering_offset = 60;
+
+module rz(angle, center=undef) {
+ /* Rotate children `angle` degrees around `center`. */
+ translate(center) {
+ rotate(angle) {
+ translate(-center) {
+ for (i=[0:$children-1])
+ children(i);
+ }
+ }
+ }
+}
+
+/* Compute coordinates of a point obtained by rotating p angle degrees
+ around center. Used to compute locations of screw holes near the
+ USB cable hole. */
+function rz_fun(p, angle, center) = [cos(angle) * (p[0] - center[0]) - sin(angle) * (p[1] - center[1]) + center[0],
+ sin(angle) * (p[0] - center[0]) + cos(angle) * (p[1] - center[1])+ center[1]];
+
+module switch_hole(position, notches=use_notched_holes) {
+ /* Cherry MX switch hole with the center at `position`. Sizes come
+ from the ErgoDox design. */
+ hole_size = 13.97;
+ notch_width = 3.5001;
+ notch_offset = 4.2545;
+ notch_depth = 0.8128;
+ translate(position) {
+ union() {
+ square([hole_size, hole_size], center=true);
+ if (notches == true) {
+ translate([0, notch_offset]) {
+ square([hole_size+2*notch_depth, notch_width], center=true);
+ }
+ translate([0, -notch_offset]) {
+ square([hole_size+2*notch_depth, notch_width], center=true);
+ }
+ }
+ }
+ }
+};
+
+module regular_key(position, size) {
+ /* Create a hole for a regular key. */
+ translate(position) {
+ square([size, size], center=true);
+ }
+}
+
+module thumb_key(position, size) {
+ /* Create a hole for a 1x1.5 unit thumb key. */
+ translate(position) {
+ scale([1, 1.5]) {
+ translate(-position) {
+ regular_key(position, size);
+ }
+ }
+ }
+}
+
+module column (bottom_position, switch_holes, key_size=key_hole_size) {
+ /* Create a column of keys. */
+ translate(bottom_position) {
+ for (i = [0:(n_rows-1)]) {
+ if (switch_holes == true) {
+ switch_hole([0, i*column_spacing]);
+ } else {
+ regular_key([0, i*column_spacing], key_size);
+ }
+ }
+ }
+}
+
+module rotate_half() {
+ /* Rotate the right half of the keys around the top left corner of
+ the thumb key. Assumes that the thumb key is a 1x1.5 key and that
+ it is shifted 0.5*column_spacing up relative to the nearest column. */
+ rotation_y_offset = 1.75 * column_spacing;
+ for (i=[0:$children-1]) {
+ rz(angle, [hand_separation, rotation_y_offset]) {
+ children(i);
+ }
+ }
+}
+
+module add_hand_separation() {
+ /* Shift everything right to get desired hand separation. */
+ for (i=[0:$children-1]) {
+ translate([0.5*hand_separation, /* we get back the full separation
+ because of mirroring */
+ 0]) children(i);
+ }
+}
+
+module right_half (switch_holes=true, key_size=key_hole_size) {
+ /* Create switch holes or key holes for the right half of the
+ keyboard. Different key_sizes are used in top_plate() and
+ spacer(). */
+ x_offset = 0.5 * row_spacing;
+ y_offset = 0.5 * column_spacing;
+ thumb_key_offset = y_offset + 0.5 * column_spacing;
+ rotate_half() {
+ add_hand_separation() {
+ for (j=[0:(n_thumb_keys-1)]) {
+ if (switch_holes == true) {
+ switch_hole([x_offset + j*row_spacing, thumb_key_offset]);
+ } else {
+ thumb_key([x_offset + j*row_spacing, thumb_key_offset], key_size);
+ }
+ }
+ for (j=[0:(n_cols-1)]) {
+ column([x_offset + (j+n_thumb_keys)*row_spacing, y_offset + staggering_offsets[j]], switch_holes, key_size);
+ }
+ }
+ }
+}
+
+module screw_hole(radius, offset_radius, position, direction) {
+ /* Create a screw hole of radius `radius` at a location
+ `offset_radius` from `position`, (diagonally), in the direction
+ `direction`. Oh, what a mess this is. */
+ /* direction is the 2-element vector specifying to which side of
+ position to move to, [-1, -1] for bottom left, etc. */
+
+ /* radius_offset is the offset in the x (or y) direction so that
+ we're offset_radius from position */
+ radius_offset = offset_radius / sqrt(2);
+ /* key_hole_offset if the difference between key spacing and key
+ hole edge */
+ key_hole_offset = 0.5*(row_spacing - key_hole_size);
+ x = position[0] + (radius_offset - key_hole_offset) * direction[0];
+ y = position[1] + (radius_offset - key_hole_offset) * direction[1];
+ translate([x,y]) {
+ circle(radius);
+ }
+}
+
+module right_screw_holes(hole_radius) {
+ /* coordinates of the back right screw hole before rotation... */
+ back_right = [(n_cols+n_thumb_keys)*row_spacing,
+ staggering_offsets[n_cols-1] + n_rows * column_spacing];
+ /* and after */
+ tmp = rz_fun(back_right, angle, [0, 2.25*column_spacing]);
+
+ nudge = 0.75;
+
+ rotate_half() {
+ add_hand_separation() {
+ screw_hole(hole_radius, washer_radius,
+ [row_spacing, 0],
+ [-nudge, -nudge]);
+ screw_hole(hole_radius, washer_radius,
+ [(n_cols+n_thumb_keys)*row_spacing, staggering_offsets[n_cols-1]],
+ [nudge, -nudge]);
+ screw_hole(hole_radius, washer_radius,
+ back_right,
+ [nudge, nudge]);
+ }
+ }
+
+ /* add the screw hole near the cable hole */
+ translate([washer_radius - tmp[0] - 0.5*hand_separation,
+ back_screw_hole_offset]) {
+ rotate_half() {
+ add_hand_separation() {
+ screw_hole(hole_radius,
+ washer_radius,
+ back_right,
+ [nudge, nudge]);
+ }
+ }
+ }
+}
+
+module screw_holes(hole_radius) {
+ /* Create all the screw holes. */
+ right_screw_holes(hole_radius);
+ mirror ([1,0,0]) { right_screw_holes(hole_radius); }
+}
+
+module left_half(switch_holes=true, key_size=key_hole_size) {
+ mirror ([1,0,0]) { right_half(switch_holes, key_size); }
+}
+
+module bottom_plate() {
+ /* bottom layer of the case */
+ difference() {
+ hull() { screw_holes(washer_radius); }
+ screw_holes(screw_hole_radius);
+ }
+}
+
+module top_plate() {
+ /* top layer of the case */
+ difference() {
+ bottom_plate();
+ right_half(false);
+ left_half(false);
+ }
+}
+
+module switch_plate() {
+ /* the switch plate */
+ difference() {
+ bottom_plate();
+ right_half();
+ left_half();
+ }
+}
+
+module spacer() {
+ /* Create a spacer. */
+ difference() {
+ union() {
+ difference() {
+ bottom_plate();
+ hull() {
+ right_half(switch_holes=false, key_size=switch_hole_size + 3);
+ left_half(switch_holes=false, key_size=switch_hole_size + 3);
+ }
+ /* add the USB cable hole: */
+ translate([-0.5*cable_hole_width, 2*column_spacing]) {
+ square([cable_hole_width, (2*n_rows) * column_spacing]);
+ }
+ }
+ screw_holes(washer_radius);
+ }
+ screw_holes(screw_hole_radius);
+ }
+}
+
+module spacer_quadrant(spacer_quadrant_number) {
+ /* Cut a quarter of a spacer. */
+ translate([0, spacer_quartering_offset]) {
+ intersection() {
+ translate([0, -spacer_quartering_offset]) { spacer(); }
+ rotate([0, 0, spacer_quadrant_number * 90]) { square([1000, 1000]); }
+ }
+ }
+}
+
+module quartered_spacer()
+{
+ /* Assemble all four quarters of a spacer. */
+ spacer_quadrant(0);
+ spacer_quadrant(1);
+ translate([-5,-10]) spacer_quadrant(2);
+ translate([5,-10]) spacer_quadrant(3);
+}
+
+/* Create all four layers. */
+top_plate();
+translate([300, 0]) { switch_plate(); }
+translate([0, 150]) { bottom_plate(); }
+translate([300, 150]) {
+ if (quarter_spacer == true) {
+ quartered_spacer();
+ }
+ else {
+ spacer();
+ }
+}
+++ /dev/null
-# OpenSCAD Atreides case design
-
-This directory contains an OpenSCAD script `atreides_case.scad` that generates Atreides case designs using a number of parameters.
-
-The main parameters are:
-
--`angle` : one half of the angle between the left and the right groups of keys
-- `n_rows`, `n_cols` : number of rows and columns to use
-- `staggering_offsets` : column staggering offsets
-- `cable_hole_width` : width of the hole for the USB cable
-- `hand_separation` : distance between the left and the right groups of keys
-- `screw_hole_radius` : radius of screw holes
-- `use_notched_holes` (boolean) : whether notched Cherry MX switch holes are desired
-
-See comments in `atreides_case.scad` for details.
-
-To use, open this script in OpenSCAD, select **Compile and Render (CGAL)** in the **Design** menu, then select **Export as DXF...**.
-
-Use Inkscape to convert to SVG, if necessary.
-
-Please note that the OpenSCAD version of the case is not a direct port of the canonical DXF; the screw placement is a little bit different, and the curve of the bottom edge sticks out a bit more.
+++ /dev/null
-// -*- mode: c -*-
-/* All distances are in mm. */
-
-/* set output quality */
-$fn = 50;
-
-/* Distance between key centers. */
-column_spacing = 19;
-row_spacing = column_spacing;
-
-/* This number should exceed row_spacing and column_spacing. The
- default gives a 1mm = (20mm - 19mm) gap between keycaps and cuts in
- the top plate.*/
-key_hole_size = 20;
-
-/* rotation angle; the angle between the halves is twice this
- number */
-angle = 10;
-
-/* The radius of screw holes. Holes will be slightly bigger due
- to the cut width. */
-screw_hole_radius = 1.5;
-/* Each screw hole is a hole in a "washer". How big these "washers"
- should be depends on the material used: this parameter and the
- `switch_hole_size` determine the spacer wall thickness. */
-washer_radius = 4 * screw_hole_radius;
-
-/* This constant allows tweaking the location of the screw holes near
- the USB cable. Only useful with small `angle` values. Try the value
- of 10 with angle=0. */
-back_screw_hole_offset = 0;
-
-/* Distance between halves. */
-hand_separation = 0;
-
-/* The approximate size of switch holes. Used to determine how
- thick walls can be, i.e. how much room around each switch hole to
- leave. See spacer(). */
-switch_hole_size = 14;
-
-/* Sets whether the case should use notched holes. As far as I can
- tell these notches are not all that useful... */
-use_notched_holes = true;
-
-/* Number of rows and columns in the matrix. You need to update
- staggering_offsets if you change n_cols. */
-n_rows = 4;
-n_cols = 5;
-
-/* Number of thumb keys (per hand), try 1 or 2. */
-n_thumb_keys = 1;
-
-/* The width of the USB cable hole in the spacer. */
-cable_hole_width = 12;
-
-/* Vertical column staggering offsets. The first element should
- be zero. */
-staggering_offsets = [0, 5, 11, 6, 3];
-
-/* Whether or not to split the spacer into quarters. */
-quarter_spacer = false;
-
-/* Where the top/bottom split of a quartered spacer will be. */
-spacer_quartering_offset = 60;
-
-module rz(angle, center=undef) {
- /* Rotate children `angle` degrees around `center`. */
- translate(center) {
- rotate(angle) {
- translate(-center) {
- for (i=[0:$children-1])
- children(i);
- }
- }
- }
-}
-
-/* Compute coordinates of a point obtained by rotating p angle degrees
- around center. Used to compute locations of screw holes near the
- USB cable hole. */
-function rz_fun(p, angle, center) = [cos(angle) * (p[0] - center[0]) - sin(angle) * (p[1] - center[1]) + center[0],
- sin(angle) * (p[0] - center[0]) + cos(angle) * (p[1] - center[1])+ center[1]];
-
-module switch_hole(position, notches=use_notched_holes) {
- /* Cherry MX switch hole with the center at `position`. Sizes come
- from the ErgoDox design. */
- hole_size = 13.97;
- notch_width = 3.5001;
- notch_offset = 4.2545;
- notch_depth = 0.8128;
- translate(position) {
- union() {
- square([hole_size, hole_size], center=true);
- if (notches == true) {
- translate([0, notch_offset]) {
- square([hole_size+2*notch_depth, notch_width], center=true);
- }
- translate([0, -notch_offset]) {
- square([hole_size+2*notch_depth, notch_width], center=true);
- }
- }
- }
- }
-};
-
-module regular_key(position, size) {
- /* Create a hole for a regular key. */
- translate(position) {
- square([size, size], center=true);
- }
-}
-
-module thumb_key(position, size) {
- /* Create a hole for a 1x1.5 unit thumb key. */
- translate(position) {
- scale([1, 1.5]) {
- translate(-position) {
- regular_key(position, size);
- }
- }
- }
-}
-
-module column (bottom_position, switch_holes, key_size=key_hole_size) {
- /* Create a column of keys. */
- translate(bottom_position) {
- for (i = [0:(n_rows-1)]) {
- if (switch_holes == true) {
- switch_hole([0, i*column_spacing]);
- } else {
- regular_key([0, i*column_spacing], key_size);
- }
- }
- }
-}
-
-module rotate_half() {
- /* Rotate the right half of the keys around the top left corner of
- the thumb key. Assumes that the thumb key is a 1x1.5 key and that
- it is shifted 0.5*column_spacing up relative to the nearest column. */
- rotation_y_offset = 1.75 * column_spacing;
- for (i=[0:$children-1]) {
- rz(angle, [hand_separation, rotation_y_offset]) {
- children(i);
- }
- }
-}
-
-module add_hand_separation() {
- /* Shift everything right to get desired hand separation. */
- for (i=[0:$children-1]) {
- translate([0.5*hand_separation, /* we get back the full separation
- because of mirroring */
- 0]) children(i);
- }
-}
-
-module right_half (switch_holes=true, key_size=key_hole_size) {
- /* Create switch holes or key holes for the right half of the
- keyboard. Different key_sizes are used in top_plate() and
- spacer(). */
- x_offset = 0.5 * row_spacing;
- y_offset = 0.5 * column_spacing;
- thumb_key_offset = y_offset + 0.5 * column_spacing;
- rotate_half() {
- add_hand_separation() {
- for (j=[0:(n_thumb_keys-1)]) {
- if (switch_holes == true) {
- switch_hole([x_offset + j*row_spacing, thumb_key_offset]);
- } else {
- thumb_key([x_offset + j*row_spacing, thumb_key_offset], key_size);
- }
- }
- for (j=[0:(n_cols-1)]) {
- column([x_offset + (j+n_thumb_keys)*row_spacing, y_offset + staggering_offsets[j]], switch_holes, key_size);
- }
- }
- }
-}
-
-module screw_hole(radius, offset_radius, position, direction) {
- /* Create a screw hole of radius `radius` at a location
- `offset_radius` from `position`, (diagonally), in the direction
- `direction`. Oh, what a mess this is. */
- /* direction is the 2-element vector specifying to which side of
- position to move to, [-1, -1] for bottom left, etc. */
-
- /* radius_offset is the offset in the x (or y) direction so that
- we're offset_radius from position */
- radius_offset = offset_radius / sqrt(2);
- /* key_hole_offset if the difference between key spacing and key
- hole edge */
- key_hole_offset = 0.5*(row_spacing - key_hole_size);
- x = position[0] + (radius_offset - key_hole_offset) * direction[0];
- y = position[1] + (radius_offset - key_hole_offset) * direction[1];
- translate([x,y]) {
- circle(radius);
- }
-}
-
-module right_screw_holes(hole_radius) {
- /* coordinates of the back right screw hole before rotation... */
- back_right = [(n_cols+n_thumb_keys)*row_spacing,
- staggering_offsets[n_cols-1] + n_rows * column_spacing];
- /* and after */
- tmp = rz_fun(back_right, angle, [0, 2.25*column_spacing]);
-
- nudge = 0.75;
-
- rotate_half() {
- add_hand_separation() {
- screw_hole(hole_radius, washer_radius,
- [row_spacing, 0],
- [-nudge, -nudge]);
- screw_hole(hole_radius, washer_radius,
- [(n_cols+n_thumb_keys)*row_spacing, staggering_offsets[n_cols-1]],
- [nudge, -nudge]);
- screw_hole(hole_radius, washer_radius,
- back_right,
- [nudge, nudge]);
- }
- }
-
- /* add the screw hole near the cable hole */
- translate([washer_radius - tmp[0] - 0.5*hand_separation,
- back_screw_hole_offset]) {
- rotate_half() {
- add_hand_separation() {
- screw_hole(hole_radius,
- washer_radius,
- back_right,
- [nudge, nudge]);
- }
- }
- }
-}
-
-module screw_holes(hole_radius) {
- /* Create all the screw holes. */
- right_screw_holes(hole_radius);
- mirror ([1,0,0]) { right_screw_holes(hole_radius); }
-}
-
-module left_half(switch_holes=true, key_size=key_hole_size) {
- mirror ([1,0,0]) { right_half(switch_holes, key_size); }
-}
-
-module bottom_plate() {
- /* bottom layer of the case */
- difference() {
- hull() { screw_holes(washer_radius); }
- screw_holes(screw_hole_radius);
- }
-}
-
-module top_plate() {
- /* top layer of the case */
- difference() {
- bottom_plate();
- right_half(false);
- left_half(false);
- }
-}
-
-module switch_plate() {
- /* the switch plate */
- difference() {
- bottom_plate();
- right_half();
- left_half();
- }
-}
-
-module spacer() {
- /* Create a spacer. */
- difference() {
- union() {
- difference() {
- bottom_plate();
- hull() {
- right_half(switch_holes=false, key_size=switch_hole_size + 3);
- left_half(switch_holes=false, key_size=switch_hole_size + 3);
- }
- /* add the USB cable hole: */
- translate([-0.5*cable_hole_width, 2*column_spacing]) {
- square([cable_hole_width, (2*n_rows) * column_spacing]);
- }
- }
- screw_holes(washer_radius);
- }
- screw_holes(screw_hole_radius);
- }
-}
-
-module spacer_quadrant(spacer_quadrant_number) {
- /* Cut a quarter of a spacer. */
- translate([0, spacer_quartering_offset]) {
- intersection() {
- translate([0, -spacer_quartering_offset]) { spacer(); }
- rotate([0, 0, spacer_quadrant_number * 90]) { square([1000, 1000]); }
- }
- }
-}
-
-module quartered_spacer()
-{
- /* Assemble all four quarters of a spacer. */
- spacer_quadrant(0);
- spacer_quadrant(1);
- translate([-5,-10]) spacer_quadrant(2);
- translate([5,-10]) spacer_quadrant(3);
-}
-
-/* Create all four layers. */
-top_plate();
-translate([300, 0]) { switch_plate(); }
-translate([0, 150]) { bottom_plate(); }
-translate([300, 150]) {
- if (quarter_spacer == true) {
- quartered_spacer();
- }
- else {
- spacer();
- }
-}
+++ /dev/null
-# OpenSCAD Atreides case design
-
-This directory contains a copy `atreides_3D.scad` of the original OpenSCAD script `atreides_case.scad` that generates Atreides case designs using a number of parameters and is rendered for 3D printing.
-
-The main parameters are:
-
- - `angle` : one half of the angle between the left and the right groups of keys
- - `n_rows`, `n_cols` : number of rows and columns to use
- - `staggering_offsets` : column staggering offsets
- - `cable_hole_width` : width of the hole for the USB cable
- - `hand_separation` : distance between the left and the right groups of keys
- - `screw_hole_radius` : radius of screw holes
- - `use_notched_holes` (boolean) : whether notched Cherry MX switch holes are desired
-
-See comments in `atreides_case.scad` for details.
-
-To use, open this script in OpenSCAD, select **Compile and Render (CGAL)** in the **Design** menu, then select **Export as DXF...**.
-
-Use OpenSCAD to export .stl as necessary.
-
-Please note that the OpenSCAD version of the case is not a direct port of the canonical DXF; the screw placement is a little bit different, and the curve of the bottom edge sticks out a bit more.
+++ /dev/null
-// -*- mode: c -*-
-/* All distances are in mm. */
-
-/* set output quality */
-$fn = 50;
-
-/* Distance between key centers. */
-column_spacing = 19;
-row_spacing = column_spacing;
-
-/* This number should exceed row_spacing and column_spacing. The
- default gives a 1mm = (20mm - 19mm) gap between keycaps and cuts in
- the top plate.*/
-key_hole_size = 20;
-
-/* rotation angle; the angle between the halves is twice this
- number */
-angle = 10;
-
-/* The radius of screw holes. Holes will be slightly bigger due
- to the cut width. */
-screw_hole_radius = 1.5;
-/* Each screw hole is a hole in a "washer". How big these "washers"
- should be depends on the material used: this parameter and the
- `switch_hole_size` determine the spacer wall thickness. */
-washer_radius = 4 * screw_hole_radius;
-
-/* This constant allows tweaking the location of the screw holes near
- the USB cable. Only useful with small `angle` values. Try the value
- of 10 with angle=0. */
-back_screw_hole_offset = 0;
-
-/* Distance between halves. */
-hand_separation = 0;
-
-/* The approximate size of switch holes. Used to determine how
- thick walls can be, i.e. how much room around each switch hole to
- leave. See spacer(). */
-switch_hole_size = 14;
-
-/* Sets whether the case should use notched holes. As far as I can
- tell these notches are not all that useful... */
-use_notched_holes = true;
-
-/* Number of rows and columns in the matrix. You need to update
- staggering_offsets if you change n_cols. */
-n_rows = 4;
-n_cols = 5;
-
-/* Number of thumb keys (per hand), try 1 or 2. */
-n_thumb_keys = 1;
-
-/* The width of the USB cable hole in the spacer. */
-cable_hole_width = 12;
-
-/* Vertical column staggering offsets. The first element should
- be zero. */
-staggering_offsets = [0, 5, 11, 6, 3];
-
-/* Whether or not to split the spacer into quarters. */
-quarter_spacer = false;
-
-/* Where the top/bottom split of a quartered spacer will be. */
-spacer_quartering_offset = 60;
-
-module rz(angle, center=undef) {
- /* Rotate children `angle` degrees around `center`. */
- translate(center) {
- rotate(angle) {
- translate(-center) {
- for (i=[0:$children-1])
- children(i);
- }
- }
- }
-}
-
-/* Compute coordinates of a point obtained by rotating p angle degrees
- around center. Used to compute locations of screw holes near the
- USB cable hole. */
-function rz_fun(p, angle, center) = [cos(angle) * (p[0] - center[0]) - sin(angle) * (p[1] - center[1]) + center[0],
- sin(angle) * (p[0] - center[0]) + cos(angle) * (p[1] - center[1])+ center[1]];
-
-module switch_hole(position, notches=use_notched_holes) {
- /* Cherry MX switch hole with the center at `position`. Sizes come
- from the ErgoDox design. */
- hole_size = 13.97;
- notch_width = 3.5001;
- notch_offset = 4.2545;
- notch_depth = 0.8128;
- translate(position) {
- union() {
- translate([0,0,-1])
- cube([hole_size, hole_size,50], center=true);
- if (notches == true) {
- translate([0, notch_offset,-1]) {
- cube([hole_size+2*notch_depth, notch_width,50], center=true);
- }
- translate([0, -notch_offset,-1]) {
- cube([hole_size+2*notch_depth, notch_width,50], center=true);
- }
- }
- }
- }
-};
-
-module regular_key(position, size) {
- /* Create a hole for a regular key. */
- translate(position) {
- cube([size, size,50], center=true);
- }
-}
-
-module thumb_key(position, size) {
- /* Create a hole for a 1x1.5 unit thumb key. */
- translate(position) {
- scale([1, 1.5]) {
- translate(-position) {
- regular_key(position, size);
- }
- }
- }
-}
-
-module column (bottom_position, switch_holes, key_size=key_hole_size) {
- /* Create a column of keys. */
- translate(bottom_position) {
- for (i = [0:(n_rows-1)]) {
- if (switch_holes == true) {
- switch_hole([0, i*column_spacing,-1]);
- } else {
- regular_key([0, i*column_spacing,-1], key_size);
- }
- }
- }
-}
-
-module rotate_half() {
- /* Rotate the right half of the keys around the top left corner of
- the thumb key. Assumes that the thumb key is a 1x1.5 key and that
- it is shifted 0.5*column_spacing up relative to the nearest column. */
- rotation_y_offset = 1.75 * column_spacing;
- for (i=[0:$children-1]) {
- rz(angle, [hand_separation, rotation_y_offset]) {
- children(i);
- }
- }
-}
-
-module add_hand_separation() {
- /* Shift everything right to get desired hand separation. */
- for (i=[0:$children-1]) {
- translate([0.5*hand_separation, /* we get back the full separation
- because of mirroring */
- 0]) children(i);
- }
-}
-
-module right_half (switch_holes=true, key_size=key_hole_size) {
- /* Create switch holes or key holes for the right half of the
- keyboard. Different key_sizes are used in top_plate() and
- spacer(). */
- x_offset = 0.5 * row_spacing;
- y_offset = 0.5 * column_spacing;
- thumb_key_offset = y_offset + 0.5 * column_spacing;
- rotate_half() {
- add_hand_separation() {
- for (j=[0:(n_thumb_keys-1)]) {
- if (switch_holes == true) {
- switch_hole([x_offset + j*row_spacing, thumb_key_offset,-1]);
- } else {
- thumb_key([x_offset + j*row_spacing, thumb_key_offset,-1], key_size);
- }
- }
- for (j=[0:(n_cols-1)]) {
- column([x_offset + (j+n_thumb_keys)*row_spacing, y_offset + staggering_offsets[j]], switch_holes, key_size);
- }
- }
- }
-}
-
-module screw_hole(radius, offset_radius, position, direction) {
- /* Create a screw hole of radius `radius` at a location
- `offset_radius` from `position`, (diagonally), in the direction
- `direction`. Oh, what a mess this is. */
- /* direction is the 2-element vector specifying to which side of
- position to move to, [-1, -1] for bottom left, etc. */
-
- /* radius_offset is the offset in the x (or y) direction so that
- we're offset_radius from position */
- radius_offset = offset_radius / sqrt(2);
- /* key_hole_offset if the difference between key spacing and key
- hole edge */
- key_hole_offset = 0.5*(row_spacing - key_hole_size);
- x = position[0] + (radius_offset - key_hole_offset) * direction[0];
- y = position[1] + (radius_offset - key_hole_offset) * direction[1];
- translate([x,y,0]) {
- cylinder(r1=radius,r2=radius,h=3);
- }
-}
-
-module right_screw_holes(hole_radius) {
- /* coordinates of the back right screw hole before rotation... */
- back_right = [(n_cols+n_thumb_keys)*row_spacing,
- staggering_offsets[n_cols-1] + n_rows * column_spacing];
- /* and after */
- tmp = rz_fun(back_right, angle, [0, 2.25*column_spacing]);
-
- nudge = 0.75;
-
- rotate_half() {
- add_hand_separation() {
- screw_hole(hole_radius, washer_radius,
- [row_spacing, 0],
- [-nudge, -nudge]);
- screw_hole(hole_radius, washer_radius,
- [(n_cols+n_thumb_keys)*row_spacing, staggering_offsets[n_cols-1]],
- [nudge, -nudge]);
- screw_hole(hole_radius, washer_radius,
- back_right,
- [nudge, nudge]);
- }
- }
-
- /* add the screw hole near the cable hole */
- translate([washer_radius - tmp[0],
- back_screw_hole_offset]) {
- rotate_half() {
- add_hand_separation() {
- screw_hole(hole_radius,
- washer_radius,
- back_right,
- [nudge, nudge]);
- }
- }
- }
-}
-
-module screw_holes(hole_radius) {
- /* Create all the screw holes. */
- right_screw_holes(hole_radius);
- mirror ([1,0,0]) { right_screw_holes(hole_radius); }
-}
-
-module left_half(switch_holes=true, key_size=key_hole_size) {
- mirror ([1,0,0]) { right_half(switch_holes, key_size); }
-}
-
-module bottom_plate() {
- /* bottom layer of the case */
- difference() {
- hull() { screw_holes(washer_radius); }
- screw_holes(screw_hole_radius);
- }
-}
-
-module top_plate() {
- /* top layer of the case */
- difference() {
- bottom_plate();
- right_half(false);
- left_half(false);
- }
-}
-
-module switch_plate() {
- /* the switch plate */
- difference() {
- bottom_plate();
- right_half();
- left_half();
- }
-}
-
-module spacer() {
- /* Create a spacer. */
- difference() {
- union() {
- difference() {
- bottom_plate();
- hull() {
- right_half(switch_holes=false, key_size=switch_hole_size + 3);
- left_half(switch_holes=false, key_size=switch_hole_size + 3);
- }
- /* add the USB cable hole: */
- translate([-0.5*cable_hole_width, 2*column_spacing,0]) {
- cube([cable_hole_width, (2*n_rows) * column_spacing,50]);
- }
- }
- screw_holes(washer_radius);
- }
- screw_holes(screw_hole_radius);
- }
-}
-
-module spacer_quadrant(spacer_quadrant_number) {
- /* Cut a quarter of a spacer. */
- translate([0, spacer_quartering_offset]) {
- intersection() {
- translate([0, -spacer_quartering_offset]) { spacer(); }
- rotate([0, 0, spacer_quadrant_number * 90]) { cube([1000, 1000,3]); }
- }
- }
-}
-
-module quartered_spacer()
-{
- /* Assemble all four quarters of a spacer. */
- spacer_quadrant(0);
- spacer_quadrant(1);
- translate([-5,-10]) spacer_quadrant(2);
- translate([5,-10]) spacer_quadrant(3);
-}
-
-/* Create all four layers. */
-
-translate([0,0,9]) top_plate();
-translate([0, 0, 6]) { switch_plate(); }
-translate([300, 0,0]) { bottom_plate(); }
-translate([0,0,3]) spacer();
-translate([0, 0,0]) {
- if (quarter_spacer == true) {
- quartered_spacer();
- }
- else {
- spacer();
- }
-
-}
projects / atreides.git / commitdiff