mirror of https://github.com/vitalif/openscad
33 lines
743 B
OpenSCAD
33 lines
743 B
OpenSCAD
// Menger Sponge
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// By Nathan Hellweg, Emmett Lalish and Marius Kintel May 13, 2013
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// CC-BY-SA license
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// Size of edge of sponge
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D=100;
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// Fractal depth (number of iterations)
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n=3;
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module menger() {
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difference() {
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cube(D, center=true);
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for (v=[[0,0,0], [0,0,90], [0,90,0]])
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rotate(v) menger_negative(side=D, maxside=D, level=n);
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}
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}
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module menger_negative(side=1, maxside=1, level=1) {
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l=side/3;
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cube([maxside*1.1, l, l], center=true);
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if (level > 1) {
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for (i=[-1:1], j=[-1:1])
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if (i || j)
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translate([0, i*l, j*l])
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menger_negative(side=l, maxside=maxside, level=level-1);
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}
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}
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difference() {
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rotate([45, atan(1/sqrt(2)), 0]) menger();
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translate([0,0,-D]) cube(2*D, center=true);
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}
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