Fun story: the aim point for the bad guys is computed by putting a big sphere around the target and picking a point randomly off the surface...they’re literally programmed to miss youhttps://twitter.com/WritNelson/status/1115134673234079747 …
Sphere is a straight radius check and usually the simplest math you can do in 3D. You just add a random unit vector multiplied by radius to get the point on the edge of the sphere. A circle requires some sort of orientation in 3D space cuz it's a 2D shape
