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module obj2D() square([2,3], center=true);
// 3 variants of 3D scale of 2D object
scale([2,4/3,2]) obj2D();
translate([5,0,0]) scale([2,4/3]) obj2D();
translate([10,0,0]) scale(2) obj2D();
// Scale by zero; 2D object
linear_extrude() scale([0,0]) obj2D();
linear_extrude() scale([0,1]) obj2D();
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