Hide Coordinates

Hide Coordinates ================ Server-side Fabric mod to prevent sending real coordinates to the client. Based on and partly copied from the Spigot version CoordinateOffset by (https://github.com/joshuaprince). Credit also goes to (https://github.com/patbox) for a small sample of code I used from Polymer! Features --- * Players' coordinates are offset so that the location they entered the current world (join, teleport, portal or respawn) is shown to them as 0, 0. * Admins can use `/coordoffset get` to find their own offset. * Admins can use `/coordoffset set ` to change their own offset such that the specified pos is in the 0,0 chunk for them, or `/coordoffset set none` to disable the offset. * Any worldborder wall is only sent to players who can see it. This is to prevent client-side mods from instantly figuring out the offset from world border center information. Why? --- The gamerule `reducedDebugInfo` hides coordinates from the debug screen, but this can be easily circumvented using a client-side mod. This mod hides the coordinates for real by offsetting all coordinates sent to the client. A server that wants to actually enforce the gamerule `reducedDebugInfo` without an honour system will need a mod like this. This is my attempt at an implementation :) Disclaimer --- I'm a new modder. I needed this for a server I'm working on and made it as a learning opportunity. Therefore the mod doesn't have all the features, the code is quite messy, and there could be bugs or crashes. But I still figured it might be useful to some others. Feel free to use the code as you please, and improvement suggestions are welcome! Known issues: * The main feature missing here from CoordinateOffset are the vast configuration options. Offsets are always set so you spawn in chunk 0,0 and this resets on death and dimension change. * Worldborder growing or shrinking looks really weird. * It's possible that I missed some packets that need the offset, let me know!