// allviews zip tgz include module zip(){ difference(){ cylinder(r=10,h=20,$fn=80); for (f=[1:4]){ translate([0,0,f*4]) cylinder(r=12,h=1,$fn=80); } } } module tgz(){ } module main_view(view){ if (view=="zip"){ zip(); }else if (view=="tgz"){ tgz(); } }