Question

层次：

ARCamera

Image target

 -Canvas

首先启动Canvas不显示（很好）

找到跟踪图像目标，画布显示

但是如果跟踪图像目标丢失，画布总是显示为卡住。

我是更改脚本并看到另一个教程

所以，我是从 defaultTrackableEventHandler.cs 复制脚本到 canvas.cs

这是来自 DefaultTrackableEventHandler.cs的脚本canvas.cs

我的画布名称是“信息”（如果需要）。

/*==============================================================================
Copyright (c) 2010-2014 Qualcomm Connected Experiences, Inc.
All Rights Reserved.
Confidential and Proprietary - Qualcomm Connected Experiences, Inc.
==============================================================================*/

using UnityEngine;

namespace Vuforia
{
/// <summary>
/// A custom handler that implements the ITrackableEventHandler interface.
/// </summary>
public class canvas : MonoBehaviour,
ITrackableEventHandler
{
#region PRIVATE_MEMBER_VARIABLES

private TrackableBehaviour mTrackableBehaviour;

#endregion // PRIVATE_MEMBER_VARIABLES



#region UNTIY_MONOBEHAVIOUR_METHODS

void Start()
{
  mTrackableBehaviour = GetComponent<TrackableBehaviour>();
  if (mTrackableBehaviour)
  {
   mTrackableBehaviour.RegisterTrackableEventHandler(this);
  }
}

#endregion // UNTIY_MONOBEHAVIOUR_METHODS



#region PUBLIC_METHODS

/// <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();
  }
}

#endregion // PUBLIC_METHODS



#region PRIVATE_METHODS


private void OnTrackingFound()
{

   Canvas[] canvasComponents = GetComponentsInChildren<Canvas>(true);

   // Enable canvas objects
   foreach (Canvas component in canvasComponents)
   {
    component.enabled = true;
   }

}


private void OnTrackingLost()
{

   Canvas[] canvasComponents = GetComponentsInChildren<Canvas>(true);

   // Disable canvas objects
   foreach (Canvas component in canvasComponents)
   {
    component.enabled = false;
   }

}

#endregion // PRIVATE_METHODS
}
}

Answer 1

转到您的资产下的DefaultTrackableEventHandler.cs - ＆gt; Vuforia - ＆GT;脚本文件夹。你会发现两种方法，即OnTrackingFound（），OnTrackingLost（）。

在OnTrackingFound（）下，添加以下代码。

Canvas[] canvasComponents = GetComponentsInChildren<Canvas>(true);

            //Enable canvas:
            foreach(Canvas component in canvasComponents)
            {
               component.enabled=true;
            }

在OnTrackingLost（）下，添加以下行

  Canvas[] canvasComponents = GetComponentsInChildren<Canvas>(true);

 // Disable canvas:
            foreach (Canvas component in canvasComponents)
            {
                component.enabled = false;
            }

注意：确保您的Canvas必须位于项目层次结构中的ImageTarget文件夹中！

那就是它！你定了！检查一下！

当轨迹图像目标丢失时，AR Vuforia Canvas始终显示并卡住

1 个答案: