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ImageTrackingObjectManager.cs
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ImageTrackingObjectManager.cs
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using System;
using UnityEngine;
using UnityEngine.XR.ARFoundation;
using UnityEngine.XR.ARSubsystems;
public class ImageTrackingObjectManager : MonoBehaviour
{
[SerializeField]
[Tooltip("Image manager on the AR Session Origin")]
ARTrackedImageManager m_ImageManager;
/// <summary>
/// Get the <c>ARTrackedImageManager</c>
/// </summary>
public ARTrackedImageManager ImageManager
{
get => m_ImageManager;
set => m_ImageManager = value;
}
[SerializeField]
[Tooltip("Reference Image Library")]
XRReferenceImageLibrary m_ImageLibrary;
/// <summary>
/// Get the <c>XRReferenceImageLibrary</c>
/// </summary>
public XRReferenceImageLibrary ImageLibrary
{
get => m_ImageLibrary;
set => m_ImageLibrary = value;
}
[SerializeField]
[Tooltip("Prefab for tracked 1 image")]
GameObject m_OnePrefab;
/// <summary>
/// Get the one prefab
/// </summary>
public GameObject onePrefab
{
get => m_OnePrefab;
set => m_OnePrefab = value;
}
GameObject m_SpawnedOnePrefab;
/// <summary>
/// get the spawned one prefab
/// </summary>
public GameObject spawnedOnePrefab
{
get => m_SpawnedOnePrefab;
set => m_SpawnedOnePrefab = value;
}
[SerializeField]
[Tooltip("Prefab for tracked 2 image")]
GameObject m_TwoPrefab;
/// <summary>
/// get the two prefab
/// </summary>
public GameObject twoPrefab
{
get => m_TwoPrefab;
set => m_TwoPrefab = value;
}
GameObject m_SpawnedTwoPrefab;
/// <summary>
/// get the spawned two prefab
/// </summary>
public GameObject spawnedTwoPrefab
{
get => m_SpawnedTwoPrefab;
set => m_SpawnedTwoPrefab = value;
}
int m_NumberOfTrackedImages;
NumberManager m_OneNumberManager;
NumberManager m_TwoNumberManager;
static Guid s_FirstImageGUID;
static Guid s_SecondImageGUID;
void OnEnable()
{
s_FirstImageGUID = m_ImageLibrary[0].guid;
s_SecondImageGUID = m_ImageLibrary[1].guid;
m_ImageManager.trackedImagesChanged += ImageManagerOnTrackedImagesChanged;
}
void OnDisable()
{
m_ImageManager.trackedImagesChanged -= ImageManagerOnTrackedImagesChanged;
}
void ImageManagerOnTrackedImagesChanged(ARTrackedImagesChangedEventArgs obj)
{
// added, spawn prefab
foreach(ARTrackedImage image in obj.added)
{
if (image.referenceImage.guid == s_FirstImageGUID)
{
m_SpawnedOnePrefab = Instantiate(m_OnePrefab, image.transform.position, image.transform.rotation);
m_OneNumberManager = m_SpawnedOnePrefab.GetComponent<NumberManager>();
}
else if (image.referenceImage.guid == s_SecondImageGUID)
{
m_SpawnedTwoPrefab = Instantiate(m_TwoPrefab, image.transform.position, image.transform.rotation);
m_TwoNumberManager = m_SpawnedTwoPrefab.GetComponent<NumberManager>();
}
}
// updated, set prefab position and rotation
foreach(ARTrackedImage image in obj.updated)
{
// image is tracking or tracking with limited state, show visuals and update it's position and rotation
if (image.trackingState == TrackingState.Tracking)
{
if (image.referenceImage.guid == s_FirstImageGUID)
{
m_OneNumberManager.Enable3DNumber(true);
m_SpawnedOnePrefab.transform.SetPositionAndRotation(image.transform.position, image.transform.rotation);
}
else if (image.referenceImage.guid == s_SecondImageGUID)
{
m_TwoNumberManager.Enable3DNumber(true);
m_SpawnedTwoPrefab.transform.SetPositionAndRotation(image.transform.position, image.transform.rotation);
}
}
// image is no longer tracking, disable visuals TrackingState.Limited TrackingState.None
else
{
if (image.referenceImage.guid == s_FirstImageGUID)
{
m_OneNumberManager.Enable3DNumber(false);
}
else if (image.referenceImage.guid == s_SecondImageGUID)
{
m_TwoNumberManager.Enable3DNumber(false);
}
}
}
// removed, destroy spawned instance
foreach(ARTrackedImage image in obj.removed)
{
if (image.referenceImage.guid == s_FirstImageGUID)
{
Destroy(m_SpawnedOnePrefab);
}
else if (image.referenceImage.guid == s_SecondImageGUID)
{
Destroy(m_SpawnedTwoPrefab);
}
}
}
public int NumberOfTrackedImages()
{
m_NumberOfTrackedImages = 0;
foreach (ARTrackedImage image in m_ImageManager.trackables)
{
if (image.trackingState == TrackingState.Tracking)
{
m_NumberOfTrackedImages++;
}
}
return m_NumberOfTrackedImages;
}
}