Unity ARFoundation 图像跟踪预制位置
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【中文标题】Unity ARFoundation 图像跟踪预制位置【英文标题】:Unity ARFoundation image tracking prefab location 【发布时间】:2019-11-23 23:55:12 【问题描述】:我正在尝试扫描标记并将 3D 对象放在该标记上。到目前为止,这是有效的,但我似乎无法在脚本(arFoundation 脚本)中找到一个位置,当找到 referenceImage 时放置预制件。获取 referenceImage 位置也很有用,因此我可以自己在该位置实例化对象。
任何帮助将不胜感激
我正在使用:
ARFoundation 2.2.0 preview
ARCore 2.1.0 preview
ARKit 2.2.0 preview
Unity 2019.1.8f1
//TrackedImageInfoManager.cs SCRIPT
public void OnTrackedImagesChanged(ARTrackedImagesChangedEventArgs eventArgs)
/*ARTrackedImage trackedImage = null;//SOME CODE FROM FORUMS, could this be better than below uncommented code?
for (int i = 0; i < eventArgs.added.Count; i++)
trackedImage = eventArgs.added[i];
// instantiate AR object, set trackedImage.transform
// use a Dictionary, the key could be the trackedImage, or the name of the reference image -> trackedImage.referenceImage.name
// the value of the Dictionary is the AR object you instantiate.
for (int i = 0; i < eventArgs.updated.Count; i++)
trackedImage = eventArgs.updated[i];
if (trackedImage.trackingState == TrackingState.Tracking)
//if (trackedImage.trackingState != TrackingState.None)
// set AR object to active, use Dictionary to get AR object based on trackedImage
// you can also include TrackingState.Limited by checking for None
else
// set active to false
for (int i = 0; i < eventArgs.removed.Count; i++)
// destroy AR object, or set active to false. Use Dictionary.
*/
//END HERE
//WORKING CODE STARTS HERE
foreach ( var trackedImage in eventArgs.added)
trackedImage.transform.localScale = new Vector3(0.1f , 0.1f , 0.1f);//when object is instaniated, this handles it scale
//trackedImage.transform.localPosition
UpdateInfo(trackedImage);
foreach( var trackedImage in eventArgs.updated)
UpdateInfo(trackedImage);
我需要找到一种方法来处理实例化的预制件,或者只是获取将实例化的位置(在 referenceImage 上)并自己实例化它。
【问题讨论】:
【参考方案1】: if (trackedImage.trackingState == TrackingState.Tracking)
// do something
这行代码可以跟踪更新问题。
【讨论】:
【参考方案2】:默认 Prefeb 在 ARTrackedImageManager 中设置为 trackedImagePrefab , 如果您想在每个新图像轨道上实例化自己的预制件,您可以像这样更改代码
void UpdateInfo(ARTrackedImage trackedImage)
if (trackedImage.trackingState != TrackingState.Tracking)
if(trackedImage.referenceImage.name == "ABC")
Instantiate(prefab1, transform.position, transform.rotation);
else if(trackedImage.referenceImage.name == "XYZ")
Instantiate(prefab2, transform.position, transform.rotation);
else
// Destroy object if you dont want to keep
希望这段代码对你有所帮助。
【讨论】:
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