Websocket Visualization Questions

[sezna]

I'm having trouble understanding what boundaries the viewport for the websocket example exist. Perhaps @Ameobea has some time to spell it out for me?

I want to remove the rng() for the largest entity that gets spawned in the middle's location, so it always starts roughly in the middle of the viewport. However, even with extensive trial and error, I cannot figure out what the appropriate x, y and z values are for this. This may be worth a new issue instead of this PR, though.