/// <summary>
/// Handles the SurfaceObserver's OnSurfaceChanged event.
/// </summary>
/// <param name="id">The identifier assigned to the surface which has changed.</param>
/// <param name="changeType">The type of change that occurred on the surface.</param>
/// <param name="bounds">The bounds of the surface.</param>
/// <param name="updateTime">The date and time at which the change occurred.</param>
private void SurfaceObserver_OnSurfaceChanged(UnityEngine.VR.WSA.SurfaceId id, UnityEngine.VR.WSA.SurfaceChange changeType, Bounds bounds, DateTime updateTime)
{
// Verify that the client of the Surface Observer is expecting updates.
if (ObserverState != ObserverStates.Running)
{
return;
}
switch (changeType)
{
case UnityEngine.VR.WSA.SurfaceChange.Added:
case UnityEngine.VR.WSA.SurfaceChange.Updated:
surfaceWorkQueue.Enqueue(id);
break;
case UnityEngine.VR.WSA.SurfaceChange.Removed:
SurfaceObject?removedSurface = RemoveSurfaceIfFound(id.handle, destroyGameObject: false);
if (removedSurface != null)
{
ReclaimSurface(removedSurface.Value);
}
break;
default:
Debug.LogErrorFormat("Unexpected {0} value: {1}.", changeType.GetType(), changeType);
break;
}
}
/// <summary>
/// Calls GetMeshAsync to update the SurfaceData and re-activate the surface object when ready.
/// </summary>
/// <param name="id">Identifier of the SurfaceData object to update.</param>
/// <param name="surface">The SurfaceData object to update.</param>
private void QueueSurfaceDataRequest(UnityEngine.VR.WSA.SurfaceId id, GameObject surface)
{
UnityEngine.VR.WSA.SurfaceData surfaceData = new UnityEngine.VR.WSA.SurfaceData(id,
surface.GetComponent <MeshFilter>(),
surface.GetComponent <UnityEngine.VR.WSA.WorldAnchor>(),
surface.GetComponent <MeshCollider>(),
TrianglesPerCubicMeter,
true);
surfaceWorkQueue.Enqueue(surfaceData);
}
/// <summary>
/// Handles the SurfaceObserver's OnSurfaceChanged event.
/// </summary>
/// <param name="id">The identifier assigned to the surface which has changed.</param>
/// <param name="changeType">The type of change that occurred on the surface.</param>
/// <param name="bounds">The bounds of the surface.</param>
/// <param name="updateTime">The date and time at which the change occurred.</param>
private void SurfaceObserver_OnSurfaceChanged(UnityEngine.VR.WSA.SurfaceId id, UnityEngine.VR.WSA.SurfaceChange changeType, Bounds bounds, System.DateTime updateTime)
{
// Verify that the client of the Surface Observer is expecting updates.
if (ObserverState != ObserverStates.Running)
{
return;
}
GameObject surface;
switch (changeType)
{
// Adding and updating are nearly identical. The only difference is if a new gameobject to contain
// the surface needs to be created.
case UnityEngine.VR.WSA.SurfaceChange.Added:
case UnityEngine.VR.WSA.SurfaceChange.Updated:
// Check to see if the surface is known to the observer.
// If so, we want to add it for cleanup after we get new meshes
// We do this because Unity doesn't properly cleanup baked collision data
if (surfaces.TryGetValue(id.handle, out surface))
{
pendingCleanup.Add(id.handle, surface);
surfaces.Remove(id.handle);
}
// Get an available surface object ready to be used
surface = GetSurfaceObject(id.handle, transform);
// Add the surface to our dictionary of known surfaces so
// we can interact with it later.
surfaces.Add(id.handle, surface);
// Add the request to create the mesh for this surface to our work queue.
QueueSurfaceDataRequest(id, surface);
break;
case UnityEngine.VR.WSA.SurfaceChange.Removed:
// Always process surface removal events.
// This code can be made more thread safe
if (surfaces.TryGetValue(id.handle, out surface))
{
surfaces.Remove(id.handle);
CleanupSurface(surface);
RemoveSurfaceObject(surface, false);
}
break;
}
// Event
if (SurfaceChanged != null)
{
SurfaceChanged(id, changeType, bounds, updateTime);
}
}
/// <summary>
/// Called once per frame.
/// </summary>
private void Update()
{
if ((ObserverState == ObserverStates.Running) && (outstandingMeshRequest == null))
{
if (surfaceWorkQueue.Count > 0)
{
// We're using a simple first-in-first-out rule for requesting meshes, but a more sophisticated algorithm could prioritize
// the queue based on distance to the user or some other metric.
UnityEngine.VR.WSA.SurfaceId surfaceID = surfaceWorkQueue.Dequeue();
string surfaceName = ("Surface-" + surfaceID.handle);
SurfaceObject newSurface;
UnityEngine.VR.WSA.WorldAnchor worldAnchor;
if (spareSurfaceObject == null)
{
newSurface = CreateSurfaceObject(
mesh: null,
objectName: surfaceName,
parentObject: transform,
meshID: surfaceID.handle,
drawVisualMeshesOverride: false
);
worldAnchor = newSurface.Object.AddComponent <UnityEngine.VR.WSA.WorldAnchor>();
}
else
{
newSurface = spareSurfaceObject.Value;
spareSurfaceObject = null;
Debug.Assert(!newSurface.Object.activeSelf);
newSurface.Object.SetActive(true);
Debug.Assert(newSurface.Filter.sharedMesh == null);
Debug.Assert(newSurface.Collider.sharedMesh == null);
newSurface.Object.name = surfaceName;
Debug.Assert(newSurface.Object.transform.parent == transform);
newSurface.ID = surfaceID.handle;
newSurface.Renderer.enabled = false;
worldAnchor = newSurface.Object.GetComponent <UnityEngine.VR.WSA.WorldAnchor>();
Debug.Assert(worldAnchor != null);
}
var surfaceData = new UnityEngine.VR.WSA.SurfaceData(
surfaceID,
newSurface.Filter,
worldAnchor,
newSurface.Collider,
TrianglesPerCubicMeter,
_bakeCollider: true
);
if (observer.RequestMeshAsync(surfaceData, SurfaceObserver_OnDataReady))
{
outstandingMeshRequest = newSurface;
}
else
{
Debug.LogErrorFormat("Mesh request for failed. Is {0} a valid Surface ID?", surfaceID.handle);
Debug.Assert(outstandingMeshRequest == null);
ReclaimSurface(newSurface);
}
}
else if ((Time.unscaledTime - updateTime) >= TimeBetweenUpdates)
{
observer.Update(SurfaceObserver_OnSurfaceChanged);
updateTime = Time.unscaledTime;
}
}
}
