WPS does not update the device position while running

Bug Reports
1

When running a simple WPS scene and trying to place multiple objects at different positions using the AR World Positioning Manager and it’s OriginLatitude / Longitude method, the latitude and longitude values will not be updated after the initial start of the app.

Example: I used the script below to spawn cubes with a random material. However when trying to place multiple cubes at different locations, only the very first lat and long values will be used. When I restart the app at a different location, it’s now that different location.

using System;
using System.Collections;
using System.Collections.Generic;
using Niantic.Experimental.Lightship.AR.WorldPositioning;
using Unity.VisualScripting;
using UnityEngine;
using UnityEngine.InputSystem;
using UnityEngine.UI;
using Random = UnityEngine.Random;

public class PlaceNewObjectInfront : MonoBehaviour
{
    [SerializeField] private GameObject _objectToSpawn;

    [SerializeField] private ARWorldPositioningObjectHelper _positioningObjectHelper;
    
    [SerializeField] private Camera mainCam;

    [SerializeField] private Button placeObject;

    [SerializeField] private ARWorldPositioningManager _positioningManager;

    [SerializeField] private List<Material> _materials;

    private List<GameObject> instantiatedObjects;

   
    
    void Start()
    {
        instantiatedObjects = new();
        placeObject.onClick.AddListener(PlaceDownObject);
        StartCoroutine(PrintPosition());
    }


    IEnumerator PrintPosition()
    {
        while (true)
        {
            Debug.Log("Position is => long :"  + _positioningManager.WorldTransform.OriginLongitude + 
                      " lat: " + _positioningManager.WorldTransform.OriginLatitude + 
                      " Alt : " + _positioningManager.WorldTransform.OriginAltitude);

            yield return new WaitForSeconds(.7f);
        }

    }
    
    
    void PlaceDownObject()
    {
        // Vector3 position = mainCam.transform.position;

        GameObject newObject = Instantiate(_objectToSpawn);
        newObject.GetComponent<MeshRenderer>().material = _materials[Random.Range(0, _materials.Count-1)];

        newObject.name = $"{newObject.name} {instantiatedObjects.Count}"; 
        instantiatedObjects.Add(newObject);
        
        var lat = _positioningManager.WorldTransform.OriginLatitude;
        var longitude =  _positioningManager.WorldTransform.OriginLongitude;
        var altitude =  0;
        
        _positioningObjectHelper.AddOrUpdateObject(newObject, lat, longitude , altitude , Quaternion.identity );
        Debug.Log("(NO DEBUG) Adding Object " + newObject + " at Latitude:" + lat + " Longitude:  " + longitude + " Altitude: " + altitude);
        
    }
}
2

Hello! The reason it isn’t currently working is because you are sending the origin’s latitude and longitude as the update location for your object. Are you trying to spawn a WPS Object when a user clicks on the screen? If so you’d have to derive the longitude and latitude from the click position and pass that in as the parameters for the AddOrUpdateObject Method.

3

But shouldn’t the origin be the current position of the user? So e.g. I place a cube at my position then walk down the street and click place again, shouldn’t the origin position have changed to my new location and place the cube there?

4

This topic was automatically closed 2 hours after the last reply. New replies are no longer allowed.

5

If you are looking to track the current position of the user, I can recommend accessing the **ARWorldPositioningCameraHelper **script. It tracks the current longitude and latitude of the camera which might be of better use to you. The origin is simply the origin of the world coordinate system.

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