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Merge branch 'lenbok-more-sa-curves' of git://github.com/Lenbok/openSCAD-projects into Lenbok-lenbok-more-sa-curves

This commit is contained in:
Robert Sheldon 2018-06-04 21:16:35 -04:00
parent bc70ca109b aaf8bf10aa
commit aa3fed7755
2 changed files with 65 additions and 10 deletions
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8
src/settings.scad
View File

@ -77,6 +77,14 @@ $dish_overdraw_height = 0;
$height_slices = 1; $height_slices = 1;
// this enables some fancy and currently hardcoded logic to bow the sides and corners of SA keycaps // this enables some fancy and currently hardcoded logic to bow the sides and corners of SA keycaps
$enable_side_sculpting = false; $enable_side_sculpting = false;
// this enables even more fancy and hardcoded logic for corner bowing of SA keycaps. (Also needs enable_side_sculpting to be true)
$enable_more_side_sculpting = false;
// When sculpting sides, how much in should the tops come
$side_sculpting_factor = 2.5;
// When sculpting corners, how much extra radius should be added
$corner_sculpting_factor = 1;
// When doing more side sculpting corners, how much extra radius should be added
$more_side_sculpting_factor = 0.4;
//minkowski radius. radius of sphere used in minkowski sum for minkowski_key function. 1.75 for G20 //minkowski radius. radius of sphere used in minkowski sum for minkowski_key function. 1.75 for G20
$minkowski_radius = .33; $minkowski_radius = .33;

67
src/shapes/rounded_square.scad
View File

@ -1,8 +1,8 @@
// side sculpting functions // side sculpting functions
// bows the sides out on stuff like SA and DSA keycaps // bows the sides out on stuff like SA and DSA keycaps
function side_sculpting(progress) = (1 - progress) * 2.5; function side_sculpting(progress) = (1 - progress) * $side_sculpting_factor;
// makes the rounded corners of the keycap grow larger as they move upwards // makes the rounded corners of the keycap grow larger as they move upwards
function corner_sculpting(progress) = pow(progress, 2); function corner_sculpting(progress) = pow(progress, 2) * $corner_sculpting_factor;
module rounded_square_shape(size, delta, progress, center = true) { module rounded_square_shape(size, delta, progress, center = true) {
width = size[0]; width = size[0];
@ -20,13 +20,60 @@ module rounded_square_shape(size, delta, progress, center = true) {
extra_height_this_slice = (height_difference - extra_side_size) * progress; extra_height_this_slice = (height_difference - extra_side_size) * progress;
extra_corner_radius_this_slice = ($corner_radius + extra_corner_size); extra_corner_radius_this_slice = ($corner_radius + extra_corner_size);
offset(r=extra_corner_radius_this_slice){ square_size = [width - extra_width_this_slice, height - extra_height_this_slice];
square( offset(r = extra_corner_radius_this_slice) offset(r = -extra_corner_radius_this_slice) {
[ if ($enable_more_side_sculpting != false && progress > 0) {
width - extra_width_this_slice - extra_corner_radius_this_slice * 2, side_rounded_square(square_size, r = $more_side_sculpting_factor * progress);
height - extra_height_this_slice - extra_corner_radius_this_slice * 2 } else {
], square(square_size, center=center);
center=center }
);
} }
} }
// Brings in a square at each corner by r, applied over the length of each side.
module side_rounded_square(size, r) {
if ($enable_more_side_sculpting == "slow") {
side_rounded_square_slow(size, r);
} else {
side_rounded_square_fast(size, r);
}
}
module side_rounded_square_fast(size, r) {
iw = size.x - 2 * r;
ih = size.y - 2 * r;
resolution = 100;
sr = r / resolution * 2;
sh = ih / resolution;
sw = iw / resolution;
union() {
translate([-iw/2, 0]) scale([sr, sh]) circle(d = resolution);
translate([iw/2, 0]) scale([sr, sh]) circle(d = resolution);
translate([0, -ih/2]) scale([sw, sr]) circle(d = resolution);
translate([0, ih/2]) scale([sw, sr]) circle(d = resolution);
square([iw, ih], center=true);
}
}
module side_rounded_square_slow(size, r) {
// These two from: https://openscadsnippetpad.blogspot.co.nz/2017/05/circle-defined-by-three-points.html
function len3(v) = sqrt(pow(v.x, 2) + pow(v.y, 2));
function circle_by_three_points(A, B, C) = let (
yD_b = C.y - B.y, xD_b = C.x - B.x, yD_a = B.y - A.y,
xD_a = B.x - A.x, aS = yD_a / xD_a, bS = yD_b / xD_b,
cex = (aS * bS * (A.y - C.y) + bS * (A.x + B.x) - aS * (B.x + C.x)) / (2 * (bS - aS)),
cey = -1 * (cex - (A.x + B.x) / 2) / aS + (A.y + B.y) / 2
)
[cex, cey];
w = size.x - r * 2;
h = size.y - r * 2;
cw = circle_by_three_points([-w / 2, 0], [0, r], [w / 2, 0]);
rw = len3([w / 2, 0] - cw);
ch = circle_by_three_points([0, -h / 2], [r, 0], [0, h / 2]);
rh = len3([0, h / 2] - ch);
intersection() {
translate(cw + [0, h / 2]) circle(r = rw, $fa=1);
translate(cw * -1 + [0, -h / 2]) circle(r = rw, $fa=1);
translate(ch + [w / 2, 0]) circle(r = rh, $fa=1);
translate(ch * -1 + [-w / 2, 0]) circle(r = rh, $fa=1);
}
}