can't save WorldAnchor

ar4ds

i can't add WorldAnchor into WorldAnchorStore
attachment is an Unity Project, and tap event will call add WorldAnchor.
my environment is unity5.6 + Hololens Enumerator.

---

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.VR.WSA.Input;
using UnityEngine.VR.WSA;
using UnityEngine.VR.WSA.Persistence;
using UnityEngine.UI;

public class Test : MonoBehaviour
{
public Transform prefabTran;
public Text text;
List was = new List();
WorldAnchorStore store;
GestureRecognizer gestureR;

void Start()
{
    InitGesture();
    WorldAnchorStore.GetAsync(myAsyncDelegate);
    WorldStoreInstance();
}

void InitGesture()
{
    gestureR = new GestureRecognizer();
    gestureR.SetRecognizableGestures(GestureSettings.Tap);
    gestureR.TappedEvent += myTapEvent;
    gestureR.StartCapturingGestures();
}

private void myTapEvent(InteractionSourceKind source, int tapCount, Ray headRay)
{
    UpdateInfo();
}

int i = 0;
void UpdateInfo()
{
    InitWAStore();
    text.text = ++i + "Count = " + store.anchorCount + " in " + was.Count + "\n";
    string[] ids = store.GetAllIds();
    foreach (string id in ids)
    {
        text.text += id + "\t";
    }
}

public void WorldStoreInstance()
{
    CreateSpheres();
    UpdateInfo();
}

void CreateSpheres()
{
    for (int x = -1; x < 2; x++)
    {
        for (int y = -1; y < 2; y++)
        {
            for (int z = 10; z < 13; z++)
            {
                Transform t = Instantiate(prefabTran, new Vector3(x, y, z), Quaternion.identity);
                t.name = x.ToString() + y.ToString() + z.ToString();
                was.Add(t.GetComponent<WorldAnchor>());
            }
        }
    }
}

void InitWAStore()
{
    for(int i = 0; i < was.Count; i++)
    {
        store.Save(was[i].gameObject.name, was[i]);
    }
}

public void myAsyncDelegate(WorldAnchorStore store){
    this.store = store;
}

}

stepan_stulov

Hey, @ar4ds

You don't seem to be adding actual WorldAnchor component to your spheres before saving them. Check your "was" list, it must be filled with nulls. Unless the prefab already contains that component, but as far as I know you want to add that component in runtime.

t.gameObject.AddComponent<WorldAnchor>();