Hitbox

A Bounding Box is the area of a Structure that takes damage.

Bounding Boxes can be displayed via the use of the console command cg_drawBBOX, if cheats are enabled (for example if you're in devmap mode).

It's important to know that the Bounding Box of the Egg and Node are different from the graphics: To hit one of these spawn buildings, you have to hit at their bottom. This is especially important for humans. Newbies tend to shoot somewhere above the bottom into the visible body of the Egg, but that does not do any damage. There also is no hit-effect or -sound, so it's easy to figure out.