MultiplayerCore (Steam/PC-Only)

A Beat Saber mod that implements core custom multiplayer functionality. This is a core mod and doesn't really add anything to the game without a custom server to support it's features. I Recommend BeatTogether.

Installation

Ensure you have the required mods.
Download the MultiplayerCore file listed under Assets Here.
- Optionally, you can get a development build by downloading the file listed under Artifacts Here (pick the topmost successful build).
- You must be logged into GitHub to download a development build.
Extract the zip file to your Beat Saber game directory (the one Beat Saber.exe is in).
- The MultiplayerCore.dll (and MultiplayerCore.pdb if it exists) should end up in your Plugins folder (NOT the one in Beat Saber_Data).
Optional: Edit Beat Saber IPA.json (in your UserData folder) and change Debug -> ShowCallSource to true. This will enable BSIPA to get file and line numbers from the PDB file where errors occur, which is very useful when reading the log files. This may have a slight impact on performance.

Lastly, check out other mods that depend on MultiplayerCore!

Requirements

These can be downloaded from BeatMods or using Mod Assistant.

BSIPA v4.1.4+
SongCore v3.9.3+
BeatSaverSharp v3.0.1+
SiraUtil 3.0.0+
BeatSaberMarkupLanguage 1.6.3+

Reporting Issues

The best way to report issues is to click on the Issues tab at the top of the GitHub page. This allows any contributor to see the problem and attempt to fix it, and others with the same issue can contribute more information. Please try the troubleshooting steps before reporting the issues listed there. Please only report issues after using the latest build, your problem may have already been fixed.
Include in your issue:
- A detailed explanation of your problem (you can also attach videos/screenshots)
- Important: The log file from the game session the issue occurred (restarting the game creates a new log file).
  - The log file can be found at Beat Saber\Logs\_latest.log (Beat Saber being the folder Beat Saber.exe is in).
If you ask for help on Discord, at least include your _latest.log file in your help request.

For Other Modders

How do I send and receive packets??? ok just do this oh yeah also you have to register the packet before you send it!!!!

// ok cool wanna make a packet?
public class WhateverTheFuckPacket : MpPacket {
    public override void Serialize(NetDataWriter writer)
    {
        // write data into packet
    }

    public override void Deserialize(NetDataReader reader)
    {
        // read data from packet
    }
}

// ok cool wanna send it and receive it now?
public class WhateverTheFuckManager : IInitializable, IDisposable
{
    [Inject]
    private readonly MpPacketSerializer _packetSerializer;

    public void Initialize()
        => _packetSerializer.RegisterCallback<WhateverTheFuckPacket>(HandlePacket);

    public void Dispose()
        => _packetSerializer.UnregisterCallback<WhateverTheFuckPacket>();

    public void Send()
    {
        // send (you can do this from anywhere really that the game can handle it but i prefer to do it here)
        _multiplayerSessionManager.Send(new WhateverTheFuckPacket());
    }

    public void HandlePacket(WhateverTheFuckPacket packet, IConnectedPlayer player)
    {
        // handle that shit fam 
    }
}

Contributing

Anyone can feel free to contribute bug fixes or enhancements to MultiplayerCore. Please keep in mind that this mod's purpose is to implement core functionality of modded multiplayer, so we will likely not be accepting enhancements that fall out of that scope. GitHub Actions for Pull Requests made from GitHub accounts that don't have direct access to the repository will fail. This is normal because the Action requires a Secret to download dependencies.

Building

Visual Studio 2022 with the BeatSaberModdingTools extension is the recommended development environment.

Check out the repository
Open MultiplayerCore.sln
Right-click the MultiplayerCore project, go to Beat Saber Modding Tools -> Set Beat Saber Directory
- This assumes you have already set the directory for your Beat Saber game folder in Extensions -> Beat Saber Modding Tools -> Settings...
- If you do not have the BeatSaberModdingTools extension, you will need to manually create a MultiplayerCore.csproj.user file to set the location of your game install. An example is showing below.
The project should now build.

Example csproj.user File:

<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="Current" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
  <PropertyGroup>
    <BeatSaberDir>Full\Path\To\Beat Saber</BeatSaberDir>
  </PropertyGroup>
</Project>

Donate

You can support development of MultiplayerCore by donating at the following links:

Goobwabber/MultiplayerCore