FreeCAD

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// CSG.scad - Basic example of CSG usage
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translate([-24,0,0]) {
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    union() {
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        cube(15, center=true);
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        sphere(10);
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    }
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}
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intersection() {
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    cube(15, center=true);
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    sphere(10);
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}
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translate([24,0,0]) {
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    difference() {
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        cube(15, center=true);
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        sphere(10);
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    }
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}
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echo(version=version());
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// Written by Marius Kintel <marius@kintel.net>
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//
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// To the extent possible under law, the author(s) have dedicated all
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// copyright and related and neighboring rights to this software to the
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// public domain worldwide. This software is distributed without any
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// warranty.
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//
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// You should have received a copy of the CC0 Public Domain
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// Dedication along with this software.
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// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
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