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add base

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Justin Lin
2021-06-07 11:31:57 +08:00
parent 9e25b59584
commit abe2fe661a
1 changed files with 65 additions and 7 deletions
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72
examples/spiral_polygons/fidget_polygon.scad
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@@ -1,3 +1,4 @@
model = "POLYGON"; // [POLYGON, BASE, BOTH]
beginning_radius = 7.5; beginning_radius = 7.5;
fn = 4; fn = 4;
number_of_polygons = 10; number_of_polygons = 10;
@@ -5,10 +6,11 @@ height = 20;
thickness = 1.5; thickness = 1.5;
spacing = 0.5 * thickness; spacing = 0.5 * thickness;
slope = 1.2; slope = 1.2;
base_height = height * 1.75;
fidget_polygon(beginning_radius, fn, number_of_polygons, height, thickness, spacing, slope); fidget_polygon(model, beginning_radius, fn, number_of_polygons, height, thickness, spacing, slope, base_height);
module fidget_polygon(beginning_radius, fn, n, height, thickness, spacing, slope) { module fidget_polygon(model, beginning_radius, fn, n, height, thickness, spacing, slope, base_height) {
theta = 180 / fn; theta = 180 / fn;
y = beginning_radius - beginning_radius * cos(theta); y = beginning_radius - beginning_radius * cos(theta);
@@ -21,12 +23,12 @@ module fidget_polygon(beginning_radius, fn, n, height, thickness, spacing, slope
circle(r, $fn = fn); circle(r, $fn = fn);
} }
rs = [for(i = [0: n]) beginning_radius + i * dr]; rs = [for(i = [0: n + 1]) beginning_radius + i * dr];
//as = [for(i = [1: n]) a(rs[i - 1], rs[i], i) / 2]; //as = [for(i = [1: n]) a(rs[i - 1], rs[i], i) / 2];
half_height = height / 2; half_height = height / 2;
s = [for(i = [1: n]) (rs[i] + slope * half_height) / rs[i]]; s = [for(i = [1: n + 1]) (rs[i] + slope * half_height) / rs[i]];
module half() { module half() {
translate([0, 0, -half_height]) { translate([0, 0, -half_height]) {
@@ -47,7 +49,63 @@ module fidget_polygon(beginning_radius, fn, n, height, thickness, spacing, slope
} }
} }
half(); if(model == "POLYGON" || model == "BOTH") {
mirror([0, 0, 1]) half();
half(); mirror([0, 0, 1])
half();
}
// base
ring_thickness = thickness * 1.5;
module base_ring() {
translate([0, 0, -ring_thickness])
difference() {
linear_extrude(ring_thickness, scale = 1.02)
offset(ring_thickness / 3, $fn = n)
drawPolygon(rs[n] * s[n] - thickness);
linear_extrude(thickness * 4, center = true)
drawPolygon(rs[n] * s[n] - ring_thickness);
}
}
if(model == "BASE" || model == "BOTH") {
color("white") {
// plate
translate([0, 0, -half_height])
linear_extrude(half_height, scale = s[n])
difference() {
drawPolygon(rs[n]);
drawPolygon(rs[n] - thickness);
}
// ring
base_ring();
mirror([0, 0, 1])
base_ring();
translate([0, 0, -base_height + ring_thickness])
mirror([0, 0, 1])
scale([1, 1, 1.5])
base_ring();
// stick
d = rs[n] * s[n];
off_h = -base_height + ring_thickness;
a = 180 / fn;
stick_r = thickness * 1.75;
stick_h = base_height - ring_thickness;
for(i = [0:fn - 1]) {
rotate(360 / fn * i)
translate([d, 0, off_h])
rotate(a) {
linear_extrude(stick_h)
circle(stick_r, $fn = fn);
translate([0, 0, stick_h])
linear_extrude(ring_thickness, scale = 0.75)
circle(stick_r, $fn = fn);
}
}
}
}
} }