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111 lines
2.6 KiB
OpenSCAD
111 lines
2.6 KiB
OpenSCAD
model = "POLYGON"; // [POLYGON, BASE, BOTH]
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beginning_radius = 7.5;
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fn = 4;
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number_of_polygons = 10;
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height = 20;
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thickness = 1;
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spacing = thickness;
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slope = 0.825;
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base_height = height * 1.75;
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fidget_polygon(model, beginning_radius, fn, number_of_polygons, height, thickness, spacing, slope, base_height);
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module fidget_polygon(model, beginning_radius, fn, n, height, thickness, spacing, slope, base_height) {
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theta = 180 / fn;
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y = beginning_radius - beginning_radius * cos(theta);
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dr = y / cos(theta) + thickness + spacing;
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pw = pow((beginning_radius + dr) * sin(theta), 2);
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// function a(ri, ro, i) = acos((pow(ro, 2) + pow(ri, 2) - pw * pow(0.985, i)) / (2 * ro * ri));
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module drawPolygon(r) {
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circle(r, $fn = fn);
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}
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rs = [for(i = [0: n + 1]) beginning_radius + i * dr];
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//as = [for(i = [1: n]) a(rs[i - 1], rs[i], i) / 2];
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half_height = height / 2;
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s = [for(i = [1: n + 1]) (rs[i] + slope * half_height) / rs[i]];
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module half() {
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translate([0, 0, -half_height]) {
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linear_extrude(half_height, scale = s[0])
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difference() {
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drawPolygon(beginning_radius);
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drawPolygon(beginning_radius - thickness);
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}
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for(i = [1:n - 1]) {
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//rotate(as[i] * 2)
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linear_extrude(half_height, scale = s[i])
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difference() {
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drawPolygon(rs[i]);
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drawPolygon(rs[i] - thickness);
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}
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}
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}
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}
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if(model == "POLYGON" || model == "BOTH") {
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half();
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mirror([0, 0, 1])
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half();
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}
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// base
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ring_thickness = thickness * 1.5;
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module base_ring() {
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translate([0, 0, -ring_thickness])
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difference() {
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linear_extrude(ring_thickness, scale = 1.02)
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offset(ring_thickness / 3, $fn = n)
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drawPolygon(rs[n] * s[n] - thickness);
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linear_extrude(thickness * 4, center = true)
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drawPolygon(rs[n] * s[n] - ring_thickness);
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}
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}
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if(model == "BASE" || model == "BOTH") {
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color("white") {
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// plate
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translate([0, 0, -half_height])
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linear_extrude(half_height, scale = s[n])
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difference() {
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drawPolygon(rs[n]);
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drawPolygon(rs[n] - thickness);
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}
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// ring
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base_ring();
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mirror([0, 0, 1])
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base_ring();
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*translate([0, 0, -base_height + ring_thickness])
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mirror([0, 0, 1])
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scale([1, 1, 1.5])
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base_ring();
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// stick
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d = rs[n] * s[n];
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off_h = -base_height + ring_thickness;
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a = 180 / fn;
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stick_r = thickness * 5;
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stick_h = base_height - ring_thickness;
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for(i = [0:fn - 1]) {
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rotate(360 / fn * i)
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translate([d + thickness * 1.5, 0, off_h])
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rotate(a) {
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linear_extrude(stick_h)
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circle(stick_r, $fn = fn);
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translate([0, 0, stick_h])
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linear_extrude(ring_thickness, scale = 0.75)
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circle(stick_r, $fn = fn);
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}
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}
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}
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}
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} |