Limit entity position updates to a player's visible screen area to prevent cheating #45
Description
As someone has pointed out, they are able to modify the HTML (or something to this effect) and expand the viewing area of PIXI.js to show beyond the normal game area.
This "cheat" was also present in the original game, and can actually be advantageous as it gives the player more information.
I believe an easy fix for this is that when we ask for the changed state entries, we would have to do some additional processing where we create a changed state array for each connected player. If some plane's position is being updated and the x/y is not within a certain threshold of the player, null out the x/y update being sent to that player.