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flat-sided keycaps 

make square_shape and rounded_square_shape use trapezoids as their top surface, perfectly shaped so that the sides of the keycap are flat, and can be used as a printing surface
This commit is contained in:
Bob 2020-03-20 19:10:24 -04:00
parent ed1b8841fb
commit 4b9cb50e48
2 changed files with 30 additions and 20 deletions
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32
src/shapes/rounded_square.scad
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@ -1,26 +1,20 @@
include <../libraries/rounded_rectangle_profile.scad>
module rounded_square_shape(size, delta, progress, center = true) {
width = size[0];
height = size[1];
offset(r=$corner_radius){
square_shape([size.x - $corner_radius*2, size.y - $corner_radius*2], delta, progress);
}
}
width_difference = delta[0];
height_difference = delta[1];
// computed values for this slice
extra_width_this_slice = (width_difference) * progress;
extra_height_this_slice = (height_difference) * progress;
extra_corner_radius_this_slice = ($corner_radius);
offset(r=extra_corner_radius_this_slice){
square(
[
width - extra_width_this_slice - extra_corner_radius_this_slice * 2,
height - extra_height_this_slice - extra_corner_radius_this_slice * 2
],
center=center
);
}
module square_shape(size, delta, progress) {
alpha = sin($top_tilt) * (top_total_key_height() - $corner_radius * 2) * 0.5;
gamma = ($width_difference * alpha) / ($total_depth+alpha);
polygon(points=[
[-size.x /2 + delta.x * progress/2 , -size.y / 2 + delta.y * progress/2],
[size.x / 2 - delta.x * progress/2,-size.y / 2 + delta.y * progress/2],
[size.x / 2 - delta.x * progress/2 + gamma * progress, size.y / 2 - delta.y * progress/2],
[-size.x / 2 + delta.x * progress/2 - gamma * progress, size.y / 2 - delta.y * progress/2]
]);
}
// for skin

18
src/shapes/square.scad
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@ -1,3 +1,19 @@
module square_shape(size, delta, progress){
module square_shape_old(size, delta, progress){
square(size - delta * progress, center = true);
}
/*
[-size.x /2,-size.y / 2],
[size.x / 2,-size.y / 2],
[size.x / 2, size.y / 2],
[-size.x / 2, size.y / 2] */
module square_shape(size, delta, progress) {
alpha = sin($top_tilt) * (top_total_key_height() - $corner_radius * 2) * 0.5;
gamma = ($width_difference * alpha) / ($total_depth+alpha);
polygon(points=[
[-size.x /2 + delta.x * progress/2 , -size.y / 2 + delta.y * progress/2],
[size.x / 2 - delta.x * progress/2,-size.y / 2 + delta.y * progress/2],
[size.x / 2 - delta.x * progress/2 + gamma * progress, size.y / 2 - delta.y * progress/2],
[-size.x / 2 + delta.x * progress/2 - gamma * progress, size.y / 2 - delta.y * progress/2]
]);
}