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WiVRn is an OpenXR streaming application built around Monado. It wirelessly connects a standalone VR headset to a Linux computer. If your headset is not wireless, look at [[VR#Monado|Monado]] instead.
WiVRn is an OpenXR streaming application built around Monado. It wirelessly connects a standalone VR headset to a Linux computer. If your headset is not wireless, look at [[VR#Monado|Monado]] instead.


Example usage of the WiVRn module:<syntaxhighlight lang="nix">
  services.wivrn = {
    enable = true;
    openFirewall = true;


    # Write information to /etc/xdg/openxr/1/active_runtime.json, VR applications
 
    # will automatically read this and work with WiVRn (Note: This does not currently
Example usage of the WiVRn module:
    # apply for games run in Valve's Proton)
 
{{File|/etc/nixos/configuration.nix|nix|3=services.wivrn = {
  enable = true;
  openFirewall = true;
 
  # Write information to /etc/xdg/openxr/1/active_runtime.json, VR applications
  # will automatically read this and work with WiVRn (Note: This does not currently
  # apply for games run in Valve's Proton)
     defaultRuntime = true;
     defaultRuntime = true;


    # Run WiVRn as a systemd service on startup
  # Run WiVRn as a systemd service on startup
    autoStart = true;
  autoStart = true;


    # Config for WiVRn (https://github.com/WiVRn/WiVRn/blob/master/docs/configuration.md)
  # Config for WiVRn (https://github.com/WiVRn/WiVRn/blob/master/docs/configuration.md)
    config = {
  config = {
      enable = true;
    enable = true;
      json = {
    json = {
        # 1.0x foveation scaling
      # 1.0x foveation scaling
        scale = 1.0;
      scale = 1.0;
        # 100 Mb/s
      # 100 Mb/s
        bitrate = 100000000;
      bitrate = 100000000;
        encoders = [
      encoders = [
          {
        {
            encoder = "vaapi";
          encoder = "vaapi";
            codec = "h265";
          codec = "h265";
            # 1.0 x 1.0 scaling
          # 1.0 x 1.0 scaling
            width = 1.0;
          width = 1.0;
            height = 1.0;
          height = 1.0;
            offset_x = 0.0;
          offset_x = 0.0;
            offset_y = 0.0;
          offset_y = 0.0;
          }
        }
        ];
      ];
      };
     };
     };
   };
   };
};}}


</syntaxhighlight>
Like Monado, you will also have to add the launch argument for WiVRn to allow access to the socket: <code>PRESSURE_VESSEL_FILESYSTEMS_RW=$XDG_RUNTIME_DIR/wivrn/comp_ipc %command%</code>


=== WiVRn + Steam ===
== Envision ==
For each VR game, go to Properties > Launch Options and put:<syntaxhighlight lang="shell">
Envision is an orchestrator for the FOSS VR stack. It handles the building and configuration of Monado, WiVRn, OpenComposite, and other utilities of the FOSS VR stack such as the Lighthouse driver, OpenHMD, Survive, and WMR. You can enable it with the Envision module:
PRESSURE_VESSEL_FILESYSTEMS_RW=$XDG_RUNTIME_DIR/wivrn/comp_ipc %command%
{{File|/etc/nixos/configuration.nix|nix|3=programs.envision = {
</syntaxhighlight>This will tell [[Steam#Proton|Proton]]/[[Steam|Steam]] to use WiVRn when that game is ran.
  enable = true;
  openFirewall = true; # This is set true by default
};}}


== SteamVR ==
== SteamVR ==
Retrieved from "https://wiki.nixos.org/wiki/VR"