private void _HandleTrackingStateChange(AnchorManagerTrackingState oldState,
AnchorManagerTrackingState newState)
{
if (oldState == newState)
{
// There is no state change to process.
return;
}
else if (newState == AnchorManagerTrackingState.Tracking)
{
// Tracking has been (re-)established, any non-localized anchors that were not lost become localized and
// all localized anchors become tracked.
m_anchors.AddRange(m_nonLocalizedAnchors);
m_nonLocalizedAnchors.Clear();
_UpdateAnchorTrackingState(AnchorTrackingState.Tracking, m_anchors);
}
else if (newState == AnchorManagerTrackingState.TrackingNotLocalized)
{
// The device is tracking but not localized; meaning the device is on a separate map from localized
// anchors. Thus, localized anchors are lost.
_UpdateAnchorTrackingState(AnchorTrackingState.LostTracking, m_anchors);
}
else if (newState == AnchorManagerTrackingState.TrackingLost)
{
// Tracking is now lost and localized anchors should move to not tracking. Any non-localized anchors
// are now lost forever (stopped).
_UpdateAnchorTrackingState(AnchorTrackingState.LostTracking, m_anchors);
_UpdateAnchorTrackingState(AnchorTrackingState.StoppedTracking, m_nonLocalizedAnchors);
m_nonLocalizedAnchors.Clear();
}
}
private void _SetNewTrackingState(FrameTrackingState frameTrackingState, bool localized)
{
AnchorManagerTrackingState oldTrackingState = m_trackingState;
if (frameTrackingState == FrameTrackingState.LostTracking)
{
m_trackingState = AnchorManagerTrackingState.TrackingLost;
}
else if (frameTrackingState == FrameTrackingState.TrackingNotInitialized)
{
m_trackingState = AnchorManagerTrackingState.TrackingStopped;
}
else if (!localized)
{
m_trackingState = AnchorManagerTrackingState.TrackingNotLocalized;
}
else
{
m_trackingState = AnchorManagerTrackingState.Tracking;
}
_HandleTrackingStateChange(oldTrackingState, m_trackingState);
}
