[CardboardCarl]

This PR adds SynchronizedTimer, an extension of Godot's default Timer node that takes advantage of netfox's rollback system to synchronize the timers across multiple clients/servers.

How to use

You can use SynchronizedTimer just like a regular Timer node! Keep in mind, though, that start() will only start the timer locally. Once the authority calls start_remote.rpc(), all clients should automatically start the timer and keep in sync.

You can also adjust the sync interval, as well as a threshold for the maximum time drift allowed between the client and authority before forcing a synchronization.

Caveats

• It is not recommended that autostart be enabled for SynchronizedTimer nodes, as it may not allow the nodes to sync properly due to one node being added to the scene before the other.

• At this time, SynchronizedTimer has only been tested thoroughly with one_shot enabled, but I hope to test it further in the future. In my opinion, it's not a huge deal to be without this option for the moment, as the most likely use case will be with one-shot timers anyways (round/game start, countdowns, etc.).

Future Additions

• Compatibility with one_shot disabled

• alternate signals for reporting a server-confirmed timeout vs a local timeout signal

• (possibly) investigate ways to send less data with RPCs, such as by using NetworkEvents or something similar

Code 100% human-made, with some comments generated and human-edited. Happy to change anything if there's an issue.