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add ivory_ball_fern_leaf

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Justin Lin 2021-08-19 16:36:42 +08:00
parent 0dc5544e2e
commit d8a444099f
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examples/ivory_ball_fern_leaf.scad Normal file
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use <hull_polyline3d.scad>;
use <hollow_out.scad>;
use <util/dedup.scad>;
use <turtle/lsystem2.scad>;
use <experimental/ptf_c2sphere.scad>;
$fn = 48;
radius = 36;
thickness = 2;
spacing = 3;
drill_angle = 38;
support_thickness = 1;
ivory_ball_fern_leaf(radius, thickness, spacing, drill_angle, support_thickness);
module ivory_ball_fern_leaf(radius, thickness, spacing, drill_angle, support_thickness) {
module fern_ball(radius, thickness, fern_n, thickness_scale) {
function fern(n = 8, angle = 4, leng = 1, heading = 0, start = [0, 0]) =
let(
axiom = "EEEA",
rules = [
["A", "[++++++++++++++EC]B+B[--------------ED]B+BA"],
["C", "[---------EE][+++++++++EE]B+C"],
["D", "[---------EE][+++++++++EE]B-D"]
]
)
lsystem2(axiom, rules, n, angle, leng, heading, start, forward_chars = "ABCDE");
r = radius * sin(drill_angle / 2) / 2;
fern = [
for(line = dedup(fern(n = fern_n)))
[
ptf_c2sphere(line[0] + [r, 0], radius * 0.99),
ptf_c2sphere(line[1] + [r, 0], radius * 0.99)
]
];
module ferns(n) {
a_step = 360 / n;
for(i = [0:n - 1]) {
rotate(i * a_step)
for(line = fern) {
hull_polyline3d(
line,
thickness * thickness_scale,
$fn = 5
);
}
}
}
color("black")
difference() {
sphere(radius);
sphere(radius - thickness);
}
union() {
ferns(4);
mirror([1, 0, 0])
mirror([0, 0, 1])
ferns(4);
mirror([0, 1, 1])
ferns(2);
mirror([0, 1, 0])
mirror([0, 1, 1])
ferns(2);
}
}
r_step = thickness + spacing;
radiuses = [radius, radius - r_step, radius - r_step * 2];
fidget_ball_drill_support(radius, thickness, spacing, support_thickness) {
fern_ball(radiuses[0], thickness, fern_n = 5, thickness_scale = 0.75);
mirror([0, 1, 1]) fern_ball(radiuses[1], thickness, fern_n = 4, thickness_scale = 0.65);
mirror([1, 1, 0]) fern_ball(radiuses[2], thickness, fern_n = 3, thickness_scale = 0.55);
};
}
module fidget_ball_drill_support(radius, thickness, spacing, support_thickness) {
module drill(deep, drill_angle) {
a = drill_angle / 2;
r = deep * tan(a);
difference() {
children(0);
union() {
for(i = [0:3]) {
rotate([90 * i, 0, 0])
translate([0, 0, -deep])
linear_extrude(deep, scale = 0.01)
circle(r);
}
for(i = [90, -90]) {
rotate([0, i, 0])
translate([0, 0, -deep])
linear_extrude(deep, scale = 0.01)
circle(r);
}
for(i = [0:3]) {
rotate([0, 54.7356, 45 + i * 90])
translate([0, 0, -deep])
linear_extrude(deep, scale = 0.01)
circle(r);
rotate([0, -125.2644, 45 + i * 90])
translate([0, 0, -deep])
linear_extrude(deep, scale = 0.01)
circle(r);
}
}
}
}
module support(i, sphere_r, height, support_thickness, drill_angle) {
a = drill_angle / 2;
support_r = 2 * sphere_r * sin(a / 2) ^ 2;
sina = sin(a);
tana = tan(a);
translate([0, 0, -sphere_r])
rotate_extrude()
translate([sphere_r * sina, 0])
polygon([[0, support_r], [-.75, support_r], [-tana * support_r - support_thickness, 0], [-tana * support_r, 0]]);
translate([0, 0, -sphere_r - height * i])
linear_extrude(height * i)
hollow_out(support_thickness)
circle(sphere_r * sina - tana * support_r);
}
r_step = thickness + spacing;
drill(radius, drill_angle)
for(i = [0:$children - 1]) {
children(i);
}
for(i = [0:$children - 1]) {
support(i, radius - r_step * i, r_step, support_thickness, drill_angle);
}
}