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My continuing problem using WorldAnchorStore data
Gosh I feel I am very foolish not to get this issue solved when working on it for so long. To explain the situation, my US buddy has a HoloLens and I just have to use the HoloLens Emulator. So have to rely on both devices being reliably interchangeable in regards to what I am trying to achieve. In a nutshell , I am still finding it very difficult to use the WorldAnchorStore on the Emulator. I followed (perhaps incorrectly) the example suggested by the moderator Partick who, on the 26th April suggested a class called PersistoMatic which saves the WorldAnchor _variable only when the public boolean value _isLocated is true. A procedure is delegated to look at the tracking changes and then the isLocated variable is re-examined. Inspired by this piece of code I rejigged it to work in my environment.
static public WorldAnchorStore anchorStore = null;
void Start()
{
WorldAnchorStore.GetAsync(StoreLoad);
}
private void StoreLoad(WorldAnchorStore store)
{
anchorStore = store;
}
Now I have a series of static procedures which are called inside a MonBehaviour Class. One of these is to create a sphere:-
static public GameObject create_sphere(Vector3 pos)
{
var m = GameObject.CreatePrimitive(PrimitiveType.Sphere);
if (pos!=Vector3.zero)m.transform.position = pos;
comment = "";
WorldAnchor anchor = null;
m.AddComponent<MeshFilter>();
m.AddComponent<BoxCollider>();
m.AddComponent<MeshRenderer>();
m.transform.localScale = Vector3.one * 0.04f;
if (anchor_now)
{
anchor_now = false;
anchor = m.AddComponent<WorldAnchor>();
anchor.transform.localScale = m.transform.localScale;
if (anchor != null)
{
//we always seem to get to this point
save_anchor_point(anchor);
if (anchor.isLocated)
{
//currently this never gets called!
comment = "world anchor is located";
posmarker.logmessage(comment);
}
}
else
{
comment = "not added worldanchor";
}
}
else comment = "Click";
return m;
}
static public bool save_anchor_point(WorldAnchor wa)
{
var sa= new saveanka(wa, anchorStore);
return sa.saved;
}
The class which deals with storing the WorldAnchor is below
public class saveanka
{
WorldAnchor wa;
WorldAnchorStore was;
bool issaved = false;
public saveanka(WorldAnchor wa,WorldAnchorStore was)
{
this.wa = wa;
this.was = was;
if (wa.isLocated)
{
wa.tag = System.DateTime.Now.TimeOfDay.TotalMilliseconds.ToString();
posmarker.comment = "added world anchor id: " + wa.tag;
posmarker.logmessage(posmarker.comment);
issaved = was.Save(wa.tag, wa);
tellitsok = true;
}
else
{
wa.OnTrackingChanged += wa_OnTrackingChanged;
}
}
private void wa_OnTrackingChanged(WorldAnchor wa, bool located)
{
if (wa.isLocated)
{
//Debug.Log("Saving persisted position in callback");
wa.tag = System.DateTime.Now.TimeOfDay.TotalMilliseconds.ToString();
posmarker.comment = "added and located world anchor id: " + wa.tag;
issaved = was.Save(wa.tag, wa);
if (issaved) tellitsok = true;
//Debug.Log("saved: " + saved);
wa.OnTrackingChanged -= wa_OnTrackingChanged;
}
}
bool tellitsok
{
set
{
addcomment.comment = "anchor saved ok at: " + wa.transform.position.ToString();
value = true;
}
}
public bool saved
{
get
{
return issaved;
}
}
public bool located
{
get
{
return wa.isLocated;
}
}
}
A sample set of anchor points looks like this on the Emulator:-
So in summary my question is:- _Does the WorldAnchor ever get the isLocated boolen set to true when using the Emulator or do I have to use the real HoloLens?
_
Many thanks in advance.