use vcad :: { centered_cube , centered_cylinder , bolt_pattern }; let plate = centered_cube ( " plate " , 120 . 0 ); let bore = centered_cylinder ( " bore " , 15 . 0 ); let wall = centered_cube ( " wall " , 60 . 0 , 32 );A radial vent pattern cut from a disc — one slot, repeated eight times:let slot = centered_cube ( " slot " , 15 . unwrap (); let mut scene = Scene :: new ( " mascot " ); scene .