避免在EXTENDED_TRACKING模式下重置目标的正确代码是什么

Question

我使用模型目标显示3d的增加。直到一切顺利每当检测到目标时，我都会使用“时间轴/可播放导演”来跟随时间轴。我的问题如下：因为我使用跟踪器设备扩展模式，所以当跟踪器模式切换到扩展跟踪器模式时会重新触发目标，因此，我希望仅在丢失跟踪时才触发目标，而不是在目标进入扩展模式跟踪器时才触发目标。如果我删除时间轴，则它变为正常，也就是说，扩展跟踪模式可以协同工作。有人帮我吗谢谢

protected override void OnTrackingFound()
{
    base.OnTrackingFound();

    // Play Timeline when target is found
    GetComponent<PlayableDirector>().Play();

}

protected override void OnTrackingLost()
{
    base.OnTrackingLost();

    // Stop Timeline when target is lost
    GetComponent<PlayableDirector>().Stop();
}

Answer 1

我猜你的脚本是基于DefaultTrackableEventHandler的

/// <summary>
/// Implementation of the ITrackableEventHandler function called when the
/// tracking state changes.
/// </summary>
public void OnTrackableStateChanged(TrackableBehaviour.Status previousStatus, TrackableBehaviour.Status newStatus)
{
    if (newStatus == TrackableBehaviour.Status.DETECTED ||
        newStatus == TrackableBehaviour.Status.TRACKED ||
        newStatus == TrackableBehaviour.Status.EXTENDED_TRACKED)
    {
        OnTrackingFound();
    }
    else
    {
        OnTrackingLost();
    }
}

如您所见，当跟踪在OnTrackingFound，DETECTED和TRACKED之间变化时，也会调用EXTENDED_TRACKED。>

---

据我所知，无需太多更改，您只需检查PlayableDirector是否已经在播放中

// Better reference this already via the Inspector
[SerializeField] private PlayableDirector director;

private void Awake()
{
    if(!director) director = GetComponent<PlayableDirector>();
} 

protected override void OnTrackingFound()
{
    base.OnTrackingFound();

    // Play Timeline when target is found
    if(director.state != PlayableState.Playing) director.Play();

}

protected override void OnTrackingLost()
{
    base.OnTrackingLost();

    // Stop Timeline when target is lost
   directory.Stop();
}

Answer 2

这是DefaultTrackableEventHandler脚本中的代码

Answer 3

我将尝试您的建议，谢谢！