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keycaps.scad
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keycaps.scad
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// Keycaps -- Contains the poly_keycap() module which can generate pretty much any kind of keycap.
use <utils.scad>
use <legends.scad>
// CONSTANTS
KEY_UNIT = 19.05; // Square that makes up the entire space of a key
// Draws the keycap without legends (because we need to do an intersection() of the keycap+legends to make sure legends conform to the correct shape)
module _poly_keycap(height=9.0, length=18, width=18,
wall_thickness=1.25, top_difference=6, top_x=0, top_y=0, dish_type="cylinder",
dish_tilt=-4, dish_depth=1, dish_x=0, dish_y=0, dish_z=-0.75, dish_thickness=2,
dish_fn=32, dish_corner_fn=64, dish_tilt_curve=false, stem_clips=false,
stem_walls_inset=0, stem_walls_tolerance=0.25,
polygon_layers=5, polygon_layer_rotation=10, polygon_curve=0, polygon_edges=4,
corner_radius=0.5, corner_radius_curve=0, polygon_rotation=false,
dish_division_x=4, dish_division_y=1, // Fancy schmancy control over spherical inverted dishes
dish_invert=false, debug=false) {
layer_x_adjust = top_x/polygon_layers;
layer_y_adjust = top_y/polygon_layers;
layer_tilt_adjust = dish_tilt/polygon_layers;
l_height = height/polygon_layers;
l_difference = (top_difference/polygon_layers);
// This (reduction_factor and height_adjust) attempts to make up for the fact that when you rotate a rectangle the corner goes *up* (not perfect but damned close!):
reduction_factor = dish_tilt_curve ? 2.25 : 2.35;
height_adjust = ((abs(width * sin(dish_tilt)) + abs(height * cos(dish_tilt))) - height)/polygon_layers/reduction_factor;
difference() {
for (l=[0:polygon_layers-1]) {
layer_height_adjust_below = (height_adjust*l);
layer_height_adjust_above = (height_adjust*(l+1));
tilt_below_curved = dish_tilt_curve ? layer_tilt_adjust * l: 0;
tilt_below_straight = dish_tilt_curve ? 0: layer_tilt_adjust * l;
tilt_above_curved = dish_tilt_curve ? layer_tilt_adjust * (l+1): 0;
tilt_above_straight = dish_tilt_curve ? 0: layer_tilt_adjust * (l+1);
tilt_below = layer_tilt_adjust * l;
tilt_above = layer_tilt_adjust * (l+1);
extra_corner_radius_below = (corner_radius*corner_radius_curve/polygon_layers)*l;
extra_corner_radius_above = (corner_radius*corner_radius_curve/polygon_layers)*(l+1);
corner_radius_below = corner_radius + extra_corner_radius_below;
corner_radius_above = corner_radius + extra_corner_radius_above;
reduction_factor_below = polygon_slice(l, polygon_curve, total_steps=polygon_layers);
reduction_factor_above = polygon_slice(l+1, polygon_curve, total_steps=polygon_layers);
curve_val_below = (top_difference - reduction_factor_below) * (l/polygon_layers);
curve_val_above = (top_difference - reduction_factor_above) * ((l+1)/polygon_layers);
if (polygon_rotation) {
hull() {
rotate([tilt_below_curved,0,polygon_layer_rotation*l]) {
translate([
layer_x_adjust*l,
layer_y_adjust*l,
l_height*l-layer_height_adjust_below])
rotate([tilt_below_straight,0,0]) {
if (polygon_edges==4) { // Normal key
xy = [length-curve_val_below,width-curve_val_below];
squarish_rpoly(xy=xy, h=0.01, r=corner_radius_below, center=false, $fn=dish_corner_fn);
} else { // We're doing something funky!
rpoly(
d=length-curve_val_below,
h=0.01, r=corner_radius_below,
edges=polygon_edges, center=false,
$fn=dish_corner_fn);
}
}
}
rotate([tilt_above_curved,0,polygon_layer_rotation*(l+1)]) {
translate([
layer_x_adjust*(l+1),
layer_y_adjust*(l+1),
l_height*(l+1)-layer_height_adjust_above])
rotate([tilt_above_straight,0,0]) {
if (polygon_edges==4) { // Normal key
xy = [length-curve_val_above,width-curve_val_above];
squarish_rpoly(
xy=xy, h=0.01, r=corner_radius_above,
center=false, $fn=dish_corner_fn);
} else { // We're doing something funky!
rpoly(
d=length-curve_val_above,
h=0.01, r=corner_radius_above,
edges=polygon_edges, center=false,
$fn=dish_corner_fn);
}
}
}
}
} else {
if (is_odd(l)) {
hull() {
rotate([tilt_below_curved,0,polygon_layer_rotation*l]) {
translate([
layer_x_adjust*l,
layer_y_adjust*l,
l_height*l-layer_height_adjust_below])
rotate([tilt_below_straight,0,0]) {
if (polygon_edges==4) { // Normal key
xy = [length-curve_val_below,width-curve_val_below];
squarish_rpoly(
xy=xy, h=0.01,
r=corner_radius_below, center=false,
$fn=dish_corner_fn);
} else { // We're doing something funky!
rpoly(
d=length-curve_val_below,
h=0.01, r=corner_radius_below,
edges=polygon_edges, center=false,
$fn=dish_corner_fn);
}
}
}
rotate([tilt_above_curved,0,-polygon_layer_rotation*(l+1)]) {
translate([
layer_x_adjust*(l+1),
layer_y_adjust*(l+1),
l_height*(l+1)-layer_height_adjust_above])
rotate([tilt_above_straight,0,0]) {
if (polygon_edges==4) { // Normal key
xy = [length-curve_val_above,width-curve_val_above];
squarish_rpoly(
xy=xy, h=0.01,
r=corner_radius_above, center=false,
$fn=dish_corner_fn);
} else { // We're doing something funky!
rpoly(
d=length-curve_val_above,
h=0.01, r=corner_radius_above,
edges=polygon_edges, center=false,
$fn=dish_corner_fn);
}
}
}
}
} else { // Even-numbered polygon layer
hull() {
if (l == 0) { // First layer
rotate([
tilt_below_curved,
0,
-polygon_layer_rotation*l-layer_height_adjust_below]) {
translate([0,0,l_height*l])
rotate([tilt_below_straight,0,0]) {
if (polygon_edges==4) { // Normal key
xy = [length-curve_val_below,width-curve_val_below];
squarish_rpoly(
xy=xy, h=0.01,
r=corner_radius_below, center=false,
$fn=dish_corner_fn);
} else { // We're doing something funky!
rpoly(
d=length-curve_val_below,
h=0.01, r=corner_radius_below,
edges=polygon_edges, center=false,
$fn=dish_corner_fn);
}
}
}
} else {
rotate([tilt_below_curved,0,-polygon_layer_rotation*l]) {
translate([
layer_x_adjust*l,
layer_y_adjust*l,
l_height*l-layer_height_adjust_below])
rotate([tilt_below_straight,0,0]) {
if (polygon_edges==4) { // Normal key
xy = [length-curve_val_below,width-curve_val_below];
squarish_rpoly(
xy=xy, h=0.01,
r=corner_radius_below, center=false,
$fn=dish_corner_fn);
} else { // We're doing something funky!
rpoly(
d=length-curve_val_below,
h=0.01, r=corner_radius_below,
edges=polygon_edges, center=false,
$fn=dish_corner_fn);
}
}
}
}
rotate([tilt_above_curved,0,polygon_layer_rotation*(l+1)]) {
translate([
layer_x_adjust*(l+1),
layer_y_adjust*(l+1),
l_height*(l+1)-layer_height_adjust_above])
rotate([tilt_above_straight,0,0]) {
if (polygon_edges==4) { // Normal key
xy = [length-curve_val_above,width-curve_val_above];
squarish_rpoly(
xy=xy, h=0.01,
r=corner_radius_above, center=false,
$fn=dish_corner_fn);
} else { // We're doing something funky!
rpoly(
d=length-curve_val_above,
h=0.01, r=corner_radius_above,
edges=polygon_edges, center=false,
$fn=dish_corner_fn);
}
}
}
}
}
}
if (dish_depth != 0 && l == polygon_layers-1 && dish_invert) {
// Last layer; do the inverted dish if needed
rotate([tilt_above_curved,0,polygon_layer_rotation*(l+1)])
translate([top_x,top_y,height-layer_height_adjust_above])
rotate([tilt_above_straight,0,0]) {
if (dish_type == "sphere") {
hull() {
if (polygon_edges==4) { // Normal key
xy = [
length-curve_val_above-top_difference,
width-curve_val_above-top_difference];
squarish_rpoly(
xy=xy, h=0.1,
r=corner_radius_above, center=false,
$fn=dish_corner_fn);
} else { // We're doing something funky!
rpoly(
d=length-curve_val_above-top_difference,
h=0.05, r=corner_radius_above,
edges=polygon_edges, center=false,
$fn=dish_corner_fn);
}
depth_step = dish_depth/polygon_layers;
depth_curve_factor = -dish_depth*4; // For this we use a fixed curve
amplitude = 1; // Sine wave amplitude
// To keep things simple we'll use the same number of polygon_layers from the main keycap:
for (bend_layer=[0:polygon_layers-1]) {
ratio = sin(bend_layer/(polygon_layers*2)*180) * amplitude;
depth_reduction_factor = polygon_slice(
bend_layer, depth_curve_factor, total_steps=polygon_layers);
depth_curve_val = (depth_step - depth_reduction_factor) * (bend_layer/polygon_layers);
adjusted_length = length - top_difference;
adjusted_width = width - top_difference;
layer_length = adjusted_length-(adjusted_length*ratio/dish_division_x);
layer_width = adjusted_width-(adjusted_width*ratio/dish_division_y);
layer_height = dish_depth*ratio;
translate([
0,
0,
depth_curve_val]) {
if (polygon_edges==4) { // Normal key
xy = [layer_length,layer_width];
squarish_rpoly(
xy=xy, h=0.01,
r=corner_radius_above*(1-ratio), center=false,
$fn=dish_corner_fn);
} else { // We're doing something funky!
rpoly(
d=layer_length, h=0.01,
r=corner_radius_above,
edges=polygon_edges, center=false,
$fn=dish_corner_fn);
}
}
}
}
} else if (dish_type == "cylinder") {
hull() {
if (polygon_edges==4) { // Normal key
xy = [length-curve_val_above-top_difference,width-curve_val_above-top_difference];
squarish_rpoly(
xy=xy, h=0.1,
r=corner_radius_above, center=false,
$fn=dish_corner_fn);
} else { // We're doing something funky!
rpoly(
d=length-curve_val_above-top_difference, h=0.1,
r=corner_radius_above, edges=polygon_edges,
center=false, $fn=dish_corner_fn);
}
depth_step = dish_depth/polygon_layers;
depth_curve_factor = -dish_depth*4; // For this we use a fixed curve
amplitude = 1; // Sine wave amplitude
// To keep things simple we'll use the same number of polygon_layers from the main keycap:
for (bend_layer=[0:polygon_layers-1]) {
ratio = sin(bend_layer/(polygon_layers*1.5)*180) * amplitude;
depth_reduction_factor = polygon_slice(
bend_layer, depth_curve_factor, total_steps=polygon_layers);
depth_curve_val = (depth_step - depth_reduction_factor) * (bend_layer/polygon_layers);
adjusted_length = length - top_difference;
adjusted_width = width - top_difference;
layer_length = adjusted_length-(adjusted_length*ratio/30);
layer_width = adjusted_width-(adjusted_width*ratio);
layer_height = dish_depth*ratio;
translate([
0,
0,
depth_curve_val]) {
if (polygon_edges==4) { // Normal key
xy = [layer_length,layer_width];
squarish_rpoly(
xy=xy, h=0.01,
r=corner_radius_above*(1-ratio), center=false,
$fn=dish_corner_fn);
} else { // We're doing something funky!
rpoly(
d=layer_length, h=0.01,
r=corner_radius_above,
edges=polygon_edges, center=false,
$fn=dish_corner_fn);
}
}
}
}
} else {
warning("inv_pyramid not supported for DISH_INVERT (dish_invert) yet");
}
}
}
}
// TODO: Instead of using cylinder() and sphere() to make these use 2D primitives like we do with the inverted dishes (so we don't have to crank up the $fn so high; to improve rendering speed)
// Do the dishes!
tilt_above_curved = dish_tilt_curve ? layer_tilt_adjust * polygon_layers : 0;
tilt_above_straight = dish_tilt_curve ? 0 : layer_tilt_adjust * polygon_layers;
z_adjust = height_adjust*(polygon_layers+2);
extra_corner_radius = (corner_radius*corner_radius_curve/polygon_layers)*polygon_layers;
corner_radius_up_top = corner_radius + extra_corner_radius;
if (!dish_invert) { // Inverted dishes aren't subtracted like this
if (dish_type == "inv_pyramid") {
rotate([tilt_above_curved,0,0])
translate([dish_x+top_x,dish_y+top_y,height-dish_depth+dish_z-z_adjust-0.1])
rotate([tilt_above_straight,0,0])
squarish_rpoly(
xy1=[0.01,0.01],
xy2=[length-top_difference+0.5,width-top_difference+0.5],
h=dish_depth+0.1, r=corner_radius_up_top,
center=false, $fn=dish_fn);
// Cut off everything above the pyramid
translate([0,0,height/2+height+dish_z-0.02])
cube([length*2,width*2,height], center=true);
} else if (dish_type == "cylinder") {
// Cylindrical cutout option:
adjusted_key_length = length - top_difference;
adjusted_key_width = width - top_difference;
adjusted_dimension = length > width ? adjusted_key_length : adjusted_key_width;
chord_length = dish_depth > 0 ? (pow(adjusted_dimension,2) - 4 * pow(dish_depth,2)) / (8 * dish_depth) : 0;
rad = (pow(adjusted_dimension, 2) + 4 * pow(dish_depth, 2)) / (8 * dish_depth);
rotate([tilt_above_curved,0,0])
translate([dish_x+top_x,dish_y+top_y,chord_length+height+dish_z-z_adjust])
rotate([tilt_above_straight,0,0])
rotate([90, 0, 0])
cylinder(h=length*3, r=rad, center=true, $fn=dish_fn);
} else if (dish_type == "sphere") {
adjusted_key_length = length - top_difference;
adjusted_key_width = width - top_difference;
adjusted_dimension = length > width ? adjusted_key_length : adjusted_key_width;
rad = dish_depth > 0 ? (pow(adjusted_dimension, 2) + 4 * pow(dish_depth, 2)) / (8 * dish_depth) : 0;
rotate([tilt_above_curved,0,0])
translate([dish_x+top_x,dish_y+top_y,rad*2+height-dish_depth+dish_z-z_adjust])
rotate([tilt_above_straight,0,0])
sphere(r=rad*2, $fn=dish_fn);
}
}
}
}
// TODO: Document all these arguments
// NOTE: If polygon_curve or corner_radius_curve are 0 they will be ignored (respectively)
module poly_keycap(height=9.0, length=18, width=18,
wall_thickness=1.25, top_difference=6, top_x=0, top_y=0,
dish_tilt=-4, dish_tilt_curve=false, stem_clips=false,
stem_walls_inset=0, stem_walls_tolerance=0.25,
dish_depth=1, dish_x=0, dish_y=0,
dish_z=-0.75, dish_thickness=2,
dish_fn=32, dish_corner_fn=64,
dish_division_x=4, dish_division_y=1, // Fancy schmancy control over spherical inverted dishes
legends=[""], legend_font_sizes=[6], legend_fonts=["Roboto"], legend_carved=false,
legend_trans=[[0,0,0]], legend_trans2=[[0,0,0]], legend_scale=[[1,1,1]],
legend_rotation=[[0,0,0]], legend_rotation2=[[0,0,0]], legend_underset=[[0,0,0]],
polygon_layers=5, polygon_layer_rotation=10, polygon_curve=0,
polygon_edges=4, dish_type="cylinder", corner_radius=0.5, corner_radius_curve=0,
homing_dot_length=0, homing_dot_width=0,
homing_dot_x=0, homing_dot_y=0, homing_dot_z=0,
visualize_legends=false, polygon_rotation=false, key_rotation=[0,0,0],
dish_invert=false, uniform_wall_thickness=true, debug=false) {
layer_tilt_adjust = dish_tilt/polygon_layers;
// Inverted dish means we need to make the legend a little taller
legend_inverted_dish_adjustment = dish_invert ? dish_depth*1.25 : 0;
inverted_dish_adjustment = dish_invert ? dish_depth : 0;
if (debug) {
// NOTE: Tried to divide these up into logical sections; all related elements should be on one line
echo(height=height, length=length, width=width);
echo(wall_thickness=wall_thickness, top_difference=top_difference, top_x=top_x, top_y=top_y);
echo(dish_tilt=dish_tilt, dish_depth=dish_depth, dish_x=dish_x, dish_y=dish_y, dish_z=dish_z, dish_thickness=dish_thickness, dish_fn=dish_fn, dish_type=dish_type, dish_invert=dish_invert);
// Really don't need to have this spit out 90% of the time... Just uncomment if you really need to see loads and loads and LOADS of debug:
// echo(legends=legends, legend_font_sizes=legend_font_sizes, legend_fonts=legend_fonts);
// echo(legend_trans=legend_trans, legend_trans2=legend_trans2);
// echo(legend_rotation=legend_rotation, legend_rotation2=legend_rotation2);
echo(polygon_layers=polygon_layers, polygon_layer_rotation=polygon_layer_rotation, polygon_rotation=polygon_rotation, polygon_curve=polygon_curve, polygon_edges=polygon_edges, corner_radius=corner_radius, corner_radius_curve=corner_radius_curve);
// These should be obvious enough that you don't need to see their values spit out in the console:
// echo(visualize_legends=visualize_legends, key_rotation=key_rotation);
echo(stem_clips=stem_clips, stem_walls_inset=stem_walls_inset);
}
rotate(key_rotation) {
difference() {
_poly_keycap(
height=height, length=length, width=width, wall_thickness=wall_thickness,
top_difference=top_difference, dish_tilt=dish_tilt,
dish_tilt_curve=dish_tilt_curve, stem_clips=stem_clips,
stem_walls_inset=stem_walls_inset,
top_x=top_x, top_y=top_y, dish_depth=dish_depth,
dish_x=dish_x, dish_y=dish_y, dish_z=dish_z,
dish_thickness=dish_thickness, dish_fn=dish_fn,
dish_corner_fn=dish_corner_fn,
polygon_layers=polygon_layers, polygon_layer_rotation=polygon_layer_rotation,
polygon_edges=polygon_edges, polygon_curve=polygon_curve,
dish_type=dish_type, corner_radius=corner_radius,
dish_division_x=dish_division_x, dish_division_y=dish_division_y,
corner_radius_curve=corner_radius_curve, polygon_rotation=polygon_rotation,
dish_invert=dish_invert);
tilt_above_curved = dish_tilt_curve ? layer_tilt_adjust * polygon_layers : 0;
// Take care of the legends
for (i=[0:1:len(legends)-1]) {
legend = legends[i] ? legends[i]: "";
rotation = legend_rotation[i] ? legend_rotation[i] : (legend_rotation[0] ? legend_rotation[0]: [0,0,0]);
rotation2 = legend_rotation2[i] ? legend_rotation2[i] : (legend_rotation2[0] ? legend_rotation2[0]: [0,0,0]);
trans = legend_trans[i] ? legend_trans[i] : (legend_trans[0] ? legend_trans[0]: [0,0,0]);
trans2 = legend_trans2[i] ? legend_trans2[i] : (legend_trans2[0] ? legend_trans2[0]: [0,0,0]);
font_size = legend_font_sizes[i] ? legend_font_sizes[i]: legend_font_sizes[0];
font = legend_fonts[i] ? legend_fonts[i] : (legend_fonts[0] ? legend_fonts[0]: "Roboto");
l_scale = legend_scale[i] ? legend_scale[i] : legend_scale[0];
underset = legend_underset[i] ? legend_underset[i] : (
legend_underset[0] ? legend_underset[0]: [0,0,0]);
if (visualize_legends) {
%translate(underset) {
translate(trans2) rotate(rotation2)
translate(trans) rotate(rotation)
scale(l_scale)
rotate([tilt_above_curved,0,0])
color([0.5,0.5,0.5,0.75]) difference() {
draw_legend(legend, font_size, font, height+legend_inverted_dish_adjustment);
// Make sure the preview matches the curve of the dish on the bottom
if (legend_carved) {
translate([0,0,-height+dish_depth-dish_z])
_poly_keycap(
height=height, length=length, width=width,
wall_thickness=wall_thickness,
top_difference=top_difference, dish_tilt=dish_tilt,
dish_tilt_curve=dish_tilt_curve, stem_clips=stem_clips,
stem_walls_inset=stem_walls_inset,
top_x=top_x, top_y=top_y, dish_depth=dish_depth,
dish_x=dish_x, dish_y=dish_y, dish_z=dish_z,
dish_division_x=dish_division_x,
dish_division_y=dish_division_y,
dish_thickness=dish_thickness+0.1, dish_fn=dish_fn,
dish_corner_fn=dish_corner_fn,
polygon_layers=polygon_layers,
polygon_layer_rotation=polygon_layer_rotation,
polygon_edges=polygon_edges, polygon_curve=polygon_curve,
dish_type=dish_type, corner_radius=corner_radius,
corner_radius_curve=corner_radius_curve,
polygon_rotation=polygon_rotation,
dish_invert=dish_invert);
}
}
}
} else {
// NOTE: This translate([0,0,0.001]) call is just to fix preview rendering
translate(underset) translate([0,0,0.001]) intersection() {
translate(trans2) rotate(rotation2)
translate(trans) rotate(rotation)
scale(l_scale)
rotate([tilt_above_curved,0,0])
difference() {
draw_legend(legend, font_size, font, height+legend_inverted_dish_adjustment);
if (legend_carved) {
translate([0,0,-height+dish_depth-dish_z])
_poly_keycap(
height=height, length=length, width=width,
wall_thickness=wall_thickness,
top_difference=top_difference, dish_tilt=dish_tilt,
dish_tilt_curve=dish_tilt_curve, stem_clips=stem_clips,
stem_walls_inset=stem_walls_inset,
top_x=top_x, top_y=top_y, dish_depth=dish_depth,
dish_x=dish_x, dish_y=dish_y, dish_z=dish_z,
dish_division_x=dish_division_x,
dish_division_y=dish_division_y,
dish_thickness=dish_thickness+0.1, dish_fn=dish_fn,
dish_corner_fn=dish_corner_fn,
polygon_layers=polygon_layers,
polygon_layer_rotation=polygon_layer_rotation,
polygon_edges=polygon_edges, polygon_curve=polygon_curve,
dish_type=dish_type, corner_radius=corner_radius,
corner_radius_curve=corner_radius_curve,
polygon_rotation=polygon_rotation,
dish_invert=dish_invert);
}
}
_poly_keycap(
height=height, length=length, width=width,
wall_thickness=wall_thickness,
top_difference=top_difference,
dish_tilt=dish_tilt,
dish_tilt_curve=dish_tilt_curve, stem_clips=stem_clips,
stem_walls_inset=stem_walls_inset,
top_x=top_x, top_y=top_y, dish_depth=dish_depth,
dish_x=dish_x, dish_y=dish_y, dish_z=dish_z,
dish_division_x=dish_division_x,
dish_division_y=dish_division_y,
dish_thickness=dish_thickness+0.1, dish_fn=dish_fn,
dish_corner_fn=dish_corner_fn,
polygon_layers=polygon_layers,
polygon_layer_rotation=polygon_layer_rotation,
polygon_edges=polygon_edges, polygon_curve=polygon_curve,
dish_type=dish_type, corner_radius=corner_radius,
corner_radius_curve=corner_radius_curve,
polygon_rotation=polygon_rotation,
dish_invert=dish_invert);
}
}
}
// Interior cutout (i.e. make room inside the keycap)
// TODO: Add support for snap-fit stems with uniform_wall_thickness
if (uniform_wall_thickness) { // Make the interior match the shape of the dish
translate([0,0,-0.001]) {
_poly_keycap(
height=height-wall_thickness, length=length-wall_thickness*2,
width=width-wall_thickness*2, wall_thickness=wall_thickness,
top_difference=top_difference,
dish_tilt=dish_tilt,
dish_tilt_curve=dish_tilt_curve, stem_clips=stem_clips,
stem_walls_inset=stem_walls_inset,
top_x=top_x, top_y=top_y, dish_depth=dish_depth,
dish_x=dish_x, dish_y=dish_y, dish_z=dish_z,
dish_thickness=dish_thickness, dish_fn=dish_fn,
dish_corner_fn=dish_corner_fn,
polygon_layers=polygon_layers,
polygon_layer_rotation=polygon_layer_rotation,
polygon_edges=polygon_edges, polygon_curve=polygon_curve,
dish_type=dish_type, corner_radius=corner_radius/1.25,
dish_division_x=dish_division_x, dish_division_y=dish_division_y,
corner_radius_curve=corner_radius_curve,
polygon_rotation=polygon_rotation,
dish_invert=dish_invert);
}
if (stem_clips) {
warning("STEM_SNAP_FIT/stem_clips does not currently wortk with UNIFORM_WALL_THICKNESS");
}
} else { // Trapezoidal interior cutout (keeps things simple)
difference() {
corner_radius_factor = ((corner_radius*corner_radius_curve/polygon_layers)*polygon_layers)/1.5;
translate([0,0,-0.001]) difference() {
squarish_rpoly(
xy1=[length-wall_thickness*2,width-wall_thickness*2],
xy2=[length-wall_thickness*2-top_difference-corner_radius_factor,
width-wall_thickness*2-top_difference-corner_radius_factor],
xy2_offset=[top_x,top_y],
h=height, r=corner_radius, center=false,
$fn=dish_corner_fn);
// TEMPORARILY DISABLED NORTHEAST INDICATOR SINCE IT WAS CAUSING PROBLEMS:
// This adds a northeast (back right) indicator so you can tell which side is which with symmetrical keycaps
// if (wall_thickness > 0) {
// translate([
// length-wall_thickness*2-0.925,
// width-wall_thickness*2-1.125,
// 0]) squarish_rpoly(
// xy1=[length-wall_thickness*2,width-wall_thickness*2],
// xy2=[length-wall_thickness*2-top_difference,width-wall_thickness*2-top_difference],
// xy2_offset=[top_x,top_y],
// h=height, r=corner_radius/2, center=false);
// }
clip_width = wall_thickness*2;
clip_height = 2;
clip_tolerance = 0.05; // Just the tiniest smidge is all that's necessary
height_factor = top_difference*(stem_walls_inset/height);
// NOTE: The top half of the clip gets cut off so the clip_height is really 1 (when set to 2)
if (stem_clips) {
translate([
length/6,
-width/2+clip_width/2+height_factor,
stem_walls_inset-clip_height/2-clip_tolerance])
difference() {
cube([length/5,clip_width,clip_height], center=true);
translate([0,0,-clip_height/1.333])
rotate([45,0,0])
cube([length,10,clip_height], center=true);
// Cut off a bit of an angle at the side so there's no printing in mid-air when printing a keycap on its side:
translate([clip_width,0,clip_width/2])
rotate([0,-key_rotation[1],0])
cube([clip_height,clip_height*2,clip_width], center=true);
}
translate([
-length/6,
-width/2+clip_width/2+height_factor,
stem_walls_inset-clip_height/2-clip_tolerance])
difference() {
cube([length/5,clip_width,clip_height], center=true);
translate([0,0,-clip_height/1.333])
rotate([45,0,0])
cube([length,10,clip_height], center=true);
translate([clip_width,0,clip_width/2])
rotate([0,-key_rotation[1],0])
cube([clip_height,clip_height*2,clip_width], center=true);
}
// Mirror the clips on the other side
mirror([0,1,0]) {
translate([
length/6,
-width/2+clip_width/2+height_factor,
stem_walls_inset-clip_height/2-clip_tolerance])
difference() {
cube([length/5,clip_width,clip_height], center=true);
translate([0,0,-clip_height/1.333])
rotate([45,0,0])
cube([length,10,clip_height], center=true);
translate([clip_width,0,clip_width/2])
rotate([0,-key_rotation[1],0])
cube([
clip_height,
clip_height*2,
clip_width], center=true);
}
translate([
-length/6,
-width/2+clip_width/2+height_factor,
stem_walls_inset-clip_height/2-clip_tolerance])
difference() {
cube([length/5,clip_width,clip_height], center=true);
translate([0,0,-clip_height/1.333])
rotate([45,0,0])
cube([length,10,clip_height], center=true);
translate([clip_width,0,clip_width/2])
rotate([0,-key_rotation[1],0])
cube([
clip_height,
clip_height*2,
clip_width], center=true);
}
}
}
}
// Cut off the top (of the interior--to make it the right height)
translate([0,0,height/2+height-dish_depth-dish_thickness+inverted_dish_adjustment])
cube([length*2,width*2,height], center=true);
}
}
}
// NOTE: ADA compliance calls for ~0.5mm-tall braille dots so that's why there's a -0.5mm below
if (homing_dot_length && homing_dot_width) { // Add "homing dots"
dot_corner_radius = homing_dot_length > homing_dot_width ? homing_dot_width/2.05 : homing_dot_length/2.05;
translate([homing_dot_x, homing_dot_y, height-dish_depth+homing_dot_z-0.5])
squarish_rpoly(
xy=[homing_dot_length,homing_dot_width],
h=dish_depth, r=dot_corner_radius, center=false);
}
}
}