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add hollow_out_cylinder

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Justin Lin 2020-03-02 11:01:33 +08:00
parent b92eafd9ea
commit 5e8514ba43
1 changed files with 42 additions and 0 deletions
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examples/hollow_out/hollow_out_cylinder.scad Normal file
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use <hull_polyline3d.scad>;
use <bend_extrude.scad>;
use <experimental/tri_delaunay.scad>;
use <experimental/tri_bisectors.scad>;
use <experimental/ptf_bend.scad>;
size = [100, 40];
pt_nums = 20;
thickness = 1;
radius = 15;
fn = 12;
xs = rands(0, size[0], pt_nums);
ys = rands(0, size[1], pt_nums);
half_fn = fn / 2;
dx = size[0] / fn;
dy = size[1] / half_fn;
points = concat(
[
[0, 0], [size[0], 0],
[size[0], size[1]], [0, size[1]]
],
[for(i = [1:fn - 1]) [i * dx, 0]],
[for(i = [1:fn - 1]) [i * dx, size[1]]],
[for(i = [1:half_fn - 1]) [0, dy * i]],
[for(i = [1:half_fn - 1]) [size[0], dy * i]],
[for(i = [0:len(xs) - 1]) [xs[i], ys[i]]]
);
bisectors = [
for(tri = tri_delaunay(points))
each tri_bisectors([points[tri[0]], points[tri[1]], points[tri[2]]])
];
for(line = bisectors) {
pts = [for(p = line) ptf_bend(size, p, radius, 360)];
hull_polyline3d(
concat(pts, [pts[0]]),
thickness = thickness,
$fn = 4
);
}