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44 lines
1.1 KiB
OpenSCAD
44 lines
1.1 KiB
OpenSCAD
use <hull_polyline3d.scad>;
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length = 100;
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diff_scale = 0.125;
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diameter = 2;
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n = 30;
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$fn = 6;
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module square_pursuit_3d(length, diff_scale, diameter, n) {
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function inter_p(p1, p2, leng, d) =
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let(
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vp = p2 - p1,
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u = vp / leng
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)
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p1 + u * d;
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module _square_pursuit_3d(pts, diff_scale, diameter, n) {
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if(n != 0) {
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vp = pts[1] - pts[0];
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leng = norm(vp);
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d = leng * diff_scale;
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npts = [for(i = [0:3]) inter_p(pts[i], pts[(i + 1) % 4], leng, d)];
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hull_polyline3d(concat(npts, [npts[3], npts[0]]), diameter);
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_square_pursuit_3d(npts, diff_scale, diameter, n - 1);
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}
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}
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half_length = length / 2;
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pts = [
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[0, 0, 0],
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[length, 0, 0],
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[half_length, half_length, sqrt(2) * half_length],
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[0, length, 0]
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];
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hull_polyline3d(concat(pts, [pts[3], pts[0]]), diameter);
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_square_pursuit_3d(pts, diff_scale, diameter, n - 1);
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}
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square_pursuit_3d(length, diff_scale, diameter, n); |