OpenXRRuntimeSelector

Runtime Json Selector for Unity OpenXR

System Requirements

Unity

• 2020.2+

Platforms

• Windows

API Compatibility Level

• .NET 4.x
• .NET Standard 2.0 with Microsoft.Win32.Registry

Support Runtime

• Environment Variable (XR_RUNTIME_JSON)
• System Default
• Oculus
• WindowsMR
• SteamVR
• ViveVR
• Varjo

Installation

Add from OpenUPM | via scoped registry, recommended

To add OpenUPM to your project:

• open Edit/Project Settings/Package Manager
• add a new Scoped Registry:

Name: OpenUPM
URL:  https://package.openupm.com/
Scope(s): com.shiena

• click Save
• open Package Manager
• Select My Registries in dropdown top left
• Select OpenXR Runtime Selector and click Install

Add from GitHub | not recommended, no updates through PackMan

You can also add it directly from GitHub on Unity 2019.4+. Note that you won't be able to receive updates through Package Manager this way, you'll have to update manually.

• open Package Manager
• click +
• select Add from Git URL
• paste https://github.com/shiena/OpenXRRuntimeSelector.git
• click Add

Sample Code

If you start XR environment after setting a specific runtime JSON, that runtime will be used.

• Automatic XR loading

using OpenXRRuntimeJsons;

void SetOculusRuntimeFromAvailableRuntimes()
{
    // Get the available OpenXR runtime json
    IReadOnlyDictionary<OpenXRRuntimeType,string> openXRRuntimes = OpenXRRuntimeJson.GetRuntimeJsonPaths();
    if (openXRRuntimes.ContainsKey(OpenXRRuntimeType.Oculus))
    {
        // Use the Oculus OpenXR runtime
        OpenXRRuntimeJson.SetRuntimeJsonPath(OpenXRRuntimeType.Oculus);
    }
}

void SetCustomRuntimeJson(string jsonPath)
{
    if (!OpenXRRuntimeJson.SetRuntimeJsonPath(jsonPath))
    {
        Debug.Log($"{jsonPath} is not available");
    }
}

Sample Project

• OpenXRRuntimeSelectorSample

References

• https://github.com/KhronosGroup/OpenXR-SDK-Source/blob/master/specification/loader/runtime.adoc