So camViewportHalfX would be the equivalent to camera.viewportWidth / 2?

What is camViewportHalfX and camViewportHalfY?

Isn't that a system-wide network change?

https://fontlibrary.org has a lot of open source fonts. You might be able to use some of those, depending on licensing and the opinions of lawyers. :P

Proper time management is a skill and is a pretty big topic. It isn't really unique to game developers and many books have been written on the topic.

No such thing as "necro" on SE. Case in point, my comment. :P

@MAnd Agreed on all points. I've used this method to spawn entities at a pretty high scale, and it works well if care is taken. :)

Be careful in your implementation of this algorithm. If implemented poorly, it won't scale well (I learned the hard way!). Also be especially careful about that last step. You'll need to add a condition under which it gives up trying to spawn a new entity. You don't want to this cycle going on forever because there are no good places to spawn! :)