add unity doc.

unity/PICO-Unity-Integration-SDK-release_3.4.0/Runtime/BuildingBlocks/PXRSample_SpatialAnchor.cs

@@ -0,0 +1,105 @@
+using Unity.XR.PXR;
+using UnityEngine;
+using UnityEngine.UI;
+using UnityEngine.XR.Interaction.Toolkit;
+
+public class PXRSample_SpatialAnchor : MonoBehaviour
+{
+    [HideInInspector]
+    public ulong anchorHandle;
+    [SerializeField]
+    private Text anchorID;
+    [SerializeField]
+    private GameObject savedIcon;
+    [SerializeField]
+    private GameObject uiCanvas;
+
+    [SerializeField] private Button btnPersist;
+    [SerializeField] private Button btnDestroyAnchor;
+    [SerializeField] private Button btnDeleteAnchor;
+
+    private void Awake()
+    {
+        //uiCanvas.SetActive(false);
+        uiCanvas.SetActive(true);
+        uiCanvas.GetComponent<Canvas>().worldCamera = Camera.main;
+
+        btnPersist.onClick.AddListener(OnBtnPressedPersist);
+        btnDestroyAnchor.onClick.AddListener(OnBtnPressedDestroy);
+        btnDeleteAnchor.onClick.AddListener(OnBtnPressedUnPersist);
+    }
+
+    protected void OnEnable()
+    {
+    }
+
+    protected void OnDisable()
+    {
+
+    }
+
+    private void Start()
+    {
+        
+    }
+
+
+    private void Update()
+    {
+        if (uiCanvas.activeSelf)
+        {
+            uiCanvas.transform.LookAt(new Vector3(uiCanvas.transform.position.x * 2 - Camera.main.transform.position.x, uiCanvas.transform.position.y * 2 - Camera.main.transform.position.y, uiCanvas.transform.position.z * 2 - Camera.main.transform.position.z), Vector3.up);
+        }
+    }
+
+    private void LateUpdate()
+    {
+        var result = PXR_MixedReality.LocateAnchor(anchorHandle, out var position, out var rotation);
+        if (result == PxrResult.SUCCESS)
+        {
+            transform.position = position;
+            transform.rotation = rotation;
+        }
+        else
+        {
+            PXRSample_SpatialAnchorManager.Instance.SetLogInfo("LocateSpatialAnchor:" + result.ToString());
+        }
+    }
+
+    private async void OnBtnPressedPersist()
+    {
+        var result = await PXR_MixedReality.PersistSpatialAnchorAsync(anchorHandle);
+        PXRSample_SpatialAnchorManager.Instance.SetLogInfo("PersistSpatialAnchorAsync:" + result.ToString());
+        if (result == PxrResult.SUCCESS)
+        {
+            ShowSaveIcon();
+        }
+    }
+
+    private void OnBtnPressedDestroy()
+    {
+        PXRSample_SpatialAnchorManager.Instance.DestroySpatialAnchor(anchorHandle);
+    }
+
+    private async void OnBtnPressedUnPersist()
+    {
+        var result = await PXR_MixedReality.UnPersistSpatialAnchorAsync(anchorHandle);
+        PXRSample_SpatialAnchorManager.Instance.SetLogInfo("UnPersistSpatialAnchorAsync:" + result.ToString());
+        if (result == PxrResult.SUCCESS)
+        {
+            OnBtnPressedDestroy();
+        }
+    }
+
+    public void SetAnchorHandle(ulong handle)
+    {
+        anchorHandle = handle;
+        anchorID.text = "ID: " + anchorHandle;
+    }
+
+    public void ShowSaveIcon()
+    {
+        savedIcon.SetActive(true);
+    }
+
+}