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Use round poly in poly gates

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Quinn
2022-01-09 15:53:50 -08:00
parent bfd9286a51
commit 7d8e4617c8
4 changed files with 40 additions and 67 deletions
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poly_gates.scad
+8 -66
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@@ -1,75 +1,17 @@
$fn = 32;
gate_height = 50;
include<math.scad>;
include<shapes.scad>;
include<round_poly.scad>;
sq_poly = let(corner = 1 / sqrt(2)) [
[-corner, -corner],
[corner, -corner],
[corner, corner],
[-corner, corner],
];
function throw_travel(throw) = gate_height * tan(throw);
oct_poly = let(corner = 1 / sqrt(2))[
[-corner, -corner],
[0,-1],
[corner, -corner],
[1,0],
[corner, corner],
[0,1],
[-corner, corner],
[-1,0],
];
octn_poly = let(corner = 1 / sqrt(2 / 1.2))[
[-corner, -corner],
[0,-1],
[corner, -corner],
[1,0],
[corner, corner],
[0,1],
[-corner, corner],
[-1,0],
];
function scale_xy(xy, m) = [ for (i = m) [i.x * xy, i.y * xy]];
function add_z(z, m) = [ for (i = m) concat(i, z) ];
function throw_end(throw, base_offset) = base_offset + gate_height * tan(throw);
function throw_polygons(shape, throw, base_offset = 0) = let(b_scale = base_offset < 0 ? 1 : base_offset)[
add_z(0, scale_xy(b_scale, shape)),
add_z(gate_height, scale_xy(throw_end(throw, base_offset), shape))
];
function throw_points(shape, throw, base_offset = 0) = let(polys = throw_polygons(shape, throw, base_offset)) [
for(i = [0,len(polys) - 1]) each polys[i]
];
function throw_faces(points) = let(length = len(points), half = len(points) / 2) [
[for(i = [0:half - 1]) i],
[half, half + 1, 1, 0],
[for(i = [length - 1:-1:half]) i],
for(i = [1:half - 2]) [half + i, half + i + 1, i + 1, i],
[length - 1, half, 0, half - 1]
];
function lerp(a,b,t) = a + (b - a) * t;
module shape_gate (shape, throw, shaft_r, sharpness = 1) {
corner_r = shaft_r * sharpness;
corner_offset = shaft_r - corner_r;
points = throw_points(shape, throw, corner_offset);
minkowski(){
polyhedron(points, throw_faces(points));
cylinder(1, corner_r);
module shape_gate (shape, throw, shaft_r, sharpness = 0) {
hull(){
round_poly(shape, shaft_r, sharpness);
}
}
sharpness = $t;
echo(sharpness);
shape_gate(sq_poly, 10, 9 / 2, 1);
shape_gate(sqr_poly, 10, 9 / 2, 1);