[This is no longer maintained]

A cooler implementation can be found https://github.com/Unity-Technologies/arfoundation-samples#arcollaborationdata

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UnityARKitMultipeerConnectivity

Using the MultipeerConnectivity framework to share AR world between nearby devices.

This is a reimplementation of Apple's sample code with Unity.

Usage

1. From Source
   • Clone or download and copy Assets/UnityMultipeerConnectivity, Assets/UnitySwift (and Assets/UnityARKitPlugin) directories to your own project.

Example code

Send ARWorldMap

public static class ARWorldMapSender
{
    public static void SendARWorld()
    {
        var mcSession = UnityMCSessionNativeInterface.GetMcSessionNativeInterface();
        var arSession = UnityARSessionNativeInterface.GetARSessionNativeInterface();

        arSession.GetCurrentWorldMapAsync(worldMap => {
            mcSession.SendToAllPeers(worldMap.SerializeToByteArray());
        });
    }
}

Receive ARWorldMap and relocalize

public class ARWorldMapReceiver : MonoBehaviour
{
    [SerializeField] UnityARCameraManager arCameraManager;

    void Start()
    {
        UnityMCSessionNativeInterface.GetMcSessionNativeInterface().DataReceivedEvent += OnDataReceived;
    }

    void OnDataReceived(byte[] data)
    {
        var worldMap = ARWorldMap.SerializeFromByteArray(data);
        UnityARSessionNativeInterface.ARSessionShouldAttemptRelocalization = true;
        var config = arCameraManager.sessionConfiguration;
        config.worldMap = worldMap;
        UnityARSessionRunOption runOption =
            UnityARSessionRunOption.ARSessionRunOptionRemoveExistingAnchors |
            UnityARSessionRunOption.ARSessionRunOptionResetTracking;
        UnityARSessionNativeInterface.GetARSessionNativeInterface()
            .RunWithConfigAndOptions(config, runOption);
    }
}

And more

See Examples.

Using neuecc/MessagePack-CSharp as serializer in this example. If you want to add or modify MessagePackObject, you need pre-code generation on Unity iOS. For more, see https://github.com/neuecc/MessagePack-CSharp/blob/master/doc/aot.md

note: Generated code path is Assets/Examples/Common/Scripts/Generated/MessagePackGenerated.cs

Requirements

• Unity 2017.1+
  • Examples are dependent on Unity 2018.2+
• iOS 12.0+
• Xcode 10.0+