Using computer aided design (CAD) allows the user to quickly make changes ... defined and is ready to extrude. To turn our flat 2D shape into a 3D model, you will need to extrude it.

Machines such as lathes, routers, lasers, water jets, and plasma tables often use two-dimensional models (2D CAM software). By contrast, most milling machines use three-dimensional models (3D CAM ...

Drawing programs and 2D CAD programs allow objects to be drawn on an X-Y scale as if they were drawn on paper. Although 3D images can be drawn in 2D programs, their views are static. They can be ...