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using UnityEngine;
using UnityEngine.XR.ARFoundation;
#if UNITY_IOS && !UNITY_EDITOR
using Unity.iOS.Multipeer;
using UnityEngine.XR.ARKit;
#endif
[RequireComponent(typeof(ARSession))]
public class CollaborativeSession : MonoBehaviour
{
[SerializeField]
[Tooltip("The name for this network service. It should be 15 characters or less and can contain ASCII, lowercase letters, numbers, and hyphens.")]
string m_ServiceType;
/// <summary>
/// The name for this network service.
/// See <a href="https://developer.apple.com/documentation/multipeerconnectivity/mcnearbyserviceadvertiser">MCNearbyServiceAdvertiser</a>
/// for the purpose of and restrictions on this name.
/// </summary>
public string serviceType
{
get { return m_ServiceType; }
set { m_ServiceType = value; }
}
ARSession m_ARSession;
void DisableNotSupported(string reason)
{
enabled = false;
Logger.Log(reason);
}
void OnEnable()
{
#if UNITY_IOS && !UNITY_EDITOR
var subsystem = GetSubsystem();
if (!ARKitSessionSubsystem.supportsCollaboration || subsystem == null)
{
DisableNotSupported("Collaborative sessions require iOS 13.");
return;
}
subsystem.collaborationEnabled = true;
m_MCSession.Enabled = true;
#else
DisableNotSupported("Collaborative sessions are an ARKit 3 feature; This platform does not support them.");
#endif
}
#if UNITY_IOS && !UNITY_EDITOR
MCSession m_MCSession;
ARKitSessionSubsystem GetSubsystem()
{
if (m_ARSession == null)
return null;
return m_ARSession.subsystem as ARKitSessionSubsystem;
}
void Awake()
{
m_ARSession = GetComponent<ARSession>();
m_MCSession = new MCSession(SystemInfo.deviceName, m_ServiceType);
}
void OnDisable()
{
m_MCSession.Enabled = false;
var subsystem = GetSubsystem();
if (subsystem != null)
subsystem.collaborationEnabled = false;
}
void Update()
{
var subsystem = GetSubsystem();
if (subsystem == null)
return;
// Check for new collaboration data
while (subsystem.collaborationDataCount > 0)
{
using (var collaborationData = subsystem.DequeueCollaborationData())
{
CollaborationNetworkingIndicator.NotifyHasCollaborationData();
if (m_MCSession.ConnectedPeerCount == 0)
continue;
using (var serializedData = collaborationData.ToSerialized())
using (var data = NSData.CreateWithBytesNoCopy(serializedData.bytes))
{
m_MCSession.SendToAllPeers(data, collaborationData.priority == ARCollaborationDataPriority.Critical
? MCSessionSendDataMode.Reliable
: MCSessionSendDataMode.Unreliable);
CollaborationNetworkingIndicator.NotifyOutgoingDataSent();
// Only log 'critical' data as 'optional' data tends to come every frame
if (collaborationData.priority == ARCollaborationDataPriority.Critical)
{
Logger.Log($"Sent {data.Length} bytes of collaboration data.");
}
}
}
}
// Check for incoming data
while (m_MCSession.ReceivedDataQueueSize > 0)
{
CollaborationNetworkingIndicator.NotifyIncomingDataReceived();
using (var data = m_MCSession.DequeueReceivedData())
using (var collaborationData = new ARCollaborationData(data.Bytes))
{
if (collaborationData.valid)
{
subsystem.UpdateWithCollaborationData(collaborationData);
if (collaborationData.priority == ARCollaborationDataPriority.Critical)
{
Logger.Log($"Received {data.Bytes.Length} bytes of collaboration data.");
}
}
else
{
Logger.Log($"Received {data.Bytes.Length} bytes from remote, but the collaboration data was not valid.");
}
}
}
}
void OnDestroy()
{
m_MCSession.Dispose();
}
#endif
}