Editing Solid modeling (section)

===Engineering===
{{Unreferenced section|date=January 2012}}
{{Main|Computer-aided engineering}}
[[File:Cobalt Properties window.png|frame|right|alt=Property window outlining the mass properties of a model in [[Cobalt (CAD program)|Cobalt]] | Mass properties window of a model in [[Cobalt (CAD program)|Cobalt]] ]]
Because CAD programs running on computers "understand" the true geometry comprising complex shapes, many attributes of/for a 3{{nbhyph}}D solid, such as its center of gravity, volume, and mass, can be quickly calculated. For instance, the cube with rounded edges shown at the top of this article measures 8.4&nbsp;mm from flat to flat. Despite its many radii and the shallow pyramid on each of its six faces, its properties are readily calculated for the designer, as shown in the screenshot at right.