Networking between VR players code compatible with the OQ toolkit, with server discovery in Local Area Networks
The main dependency is on the Oculus Quest VR Toolkit:
https://github.com/NeoSpark314/godot_oculus_quest_toolkit/tree/master/OQ_Toolkit
The source code of this is small, so it has been duplicated into this repository.
The library also depends on a new version of the Godot Oculus Mobile Plugin than in
the asset store, so this has also been committed into addons/godot_ovrmobile.
The other dependency you need to fetch from the AssetLib in order to run this
on a PCVR (ie not the Quest VR) is OpenVR module. Only install the files that
are in the addons directory.
Hit the 'G' key to toggle the Doppelganger, which is your avatar played back at a different position. This will be useful for developing compression and interpolation features and to see what you look like.
You can run this between two instances of Godot on the same computer (don't forget to change the Editor -> Settings -> Network -> Debug -> Remote port if you want to see the debug messages from both instances).
Then hit '1' on the first instance to set it as the Server, and '2' on the second instance to set it as the client "Local network". The Server instance will then broadcast a UDP packet with the phrase "OQServer_here!" on 255.255.255.255 port 4546 every 2 seconds, and the client instance will listen for it to get its ipnumber, whereupon it will automatically connect using ENET and implement the stages described in https://docs.godotengine.org/en/stable/tutorials/networking/high_level_multiplayer.html
Use the right mouse button to drag the view to see the other player avatar in the area, and perform motions described by the VR simulator keys.
Instructions are the same as above. Make sure both are connected to the same Local (Wifi) network. The Quest2 can operate either as a Server or a Client. Hand tracking is enabled.
Put your server url or ipnumber in the list of remoteservers. Then log on to your server use a screen instance and do:
wget https://github.com/goatchurchprime/OQ_Networking_Demo/releases/download/v0.2/OQ_Networking_Demo.pck
./Godot_v3.2.3-stable_linux_headless.64 --main-pack OQ_Networking_Demo.pck
The theory of networked players is as follows. Firstly, the HMD and hand/controller positions must be mapped to a self-contained, possibly invisible, avatar instance. Then the positions and pose of this avatar is transmitted to its peers. The NetworkGateway module is responsible for all the setting up, player connections, initializations, and disconnections.
This version has no motion compression or frame interpolation. The positions are simply sampled at 4 times a second, transmitted and replayed.
To fit with the modular design of the OQ_Toolkit, avatar modules (as they develop) should be self-contained and interchangeable. They are not strictly humanoid. For example, a Beep Saber avatar will have long retractable appendages for hands.