73 lines
1.5 KiB
OpenSCAD
73 lines
1.5 KiB
OpenSCAD
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// https://en.wikipedia.org/wiki/Bitruncated_cubic_honeycomb
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module _trunc_octa() {
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octapoints = [
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[+1, 0, 0],
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[-1, 0, 0],
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[0, +1, 0],
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[0, -1, 0],
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[0, 0, +1],
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[0, 0, -1]
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];
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octafaces = [
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[4, 2, 0],
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[4, 0, 3],
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[4, 3, 1],
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[4, 1, 2],
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[5, 0, 2],
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[5, 3, 0],
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[5, 1, 3],
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[5, 2, 1]
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];
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intersection() {
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scale(3) {
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polyhedron(points=octapoints, faces=octafaces);
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}
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cube(size=4, center=true);
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}
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}
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module _hollow_trunc_octa(wall) {
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difference() {
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_trunc_octa();
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scale(1 - wall)
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_trunc_octa();
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}
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}
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module _3d_honeycomb(cells, wall) {
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translate([2, 2, 2])
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for (xi = [0 : cells[0] - 1]) {
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translate([xi * 4, 0, 0])
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for (yi = [0 : cells[1] - 1]) {
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translate([0, yi * 4, 0])
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for (zi = [0 : cells[2] - 1]) {
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offset = (zi % 2 == 0) ? 0 : 2;
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translate([offset, offset, zi * 2])
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_hollow_trunc_octa(wall=wall);
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}
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}
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}
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}
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module 3d_honeycomb(dims, wall=0.2) {
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intersection() {
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translate([-2, -2, -2])
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rotate([45, 0, 0])
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_3d_honeycomb([
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ceil(dims[0] / 4) + 1,
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ceil(dims[1] / 4) + 1,
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ceil(dims[2] / 2) + 1,
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], wall=wall);
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cube(dims);
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}
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}
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//scale(2)
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3d_honeycomb([16, 16, 16], wall=0.1);
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