/// <summary>
/// Derived classes will call this method at the beginning of a Unity frame so that the Subsystem
/// can feed the face events up to their subscribers at the right time in the Unity frame.
/// </summary>
protected static void OnBeginFrame()
{
foreach (var faceAddedEventArgs in s_FacesAddedThisFrame)
{
XRFaceSubsystem faceSubsystem = faceAddedEventArgs.xrFaceSubsystem;
if (faceSubsystem.faceAdded != null)
{
faceSubsystem.faceAdded.Invoke(faceAddedEventArgs);
}
}
foreach (var faceUpdatedEventArgs in s_FacesUpdatedThisFrame)
{
XRFaceSubsystem faceSubsystem = faceUpdatedEventArgs.xrFaceSubsystem;
if (faceSubsystem.faceUpdated != null)
{
faceSubsystem.faceUpdated.Invoke(faceUpdatedEventArgs);
}
}
foreach (var faceRemovedEventArgs in s_FacesRemovedThisFrame)
{
XRFaceSubsystem faceSubsystem = faceRemovedEventArgs.xrFaceSubsystem;
if (faceSubsystem.faceRemoved != null)
{
faceSubsystem.faceRemoved.Invoke(faceRemovedEventArgs);
}
}
s_FacesAddedThisFrame.Clear();
s_FacesUpdatedThisFrame.Clear();
s_FacesRemovedThisFrame.Clear();
}
/// <summary>
/// Derived classes will call this method to inform the subsystem of each face removed this frame
/// </summary>
/// <param name="xrFace"><see cref="XRFace"/> that was removed.</param>
/// <param name="faceSubsystem"><see cref="XRFaceSubsystem"/> this face belongs to.</param>
protected static void InvokeFaceRemovedCallback(XRFace xrFace, XRFaceSubsystem faceSubsystem)
{
var faceRemovedEventArgs = new FaceRemovedEventArgs
{
xrFace = xrFace,
xrFaceSubsystem = faceSubsystem
};
s_FacesRemovedThisFrame.Add(faceRemovedEventArgs);
}