How to Raycast to point and cloud particle in ARFoundation?

I want to know the exact real-world location of a particular point cloud particle. So, I tried to raycast the point cloud particle, but it gives the wrong results.
Here's my previous workaround:

Code (CSharp):

1.         if (Input.touchCount > 0 )
2.         {
3.             Touch touch = Input.GetTouch(0);
4.          
5.             var hits = new List<ARRaycastHit>();
6.             Ray ray = Camera.main.ScreenPointToRay(touch.position);
7.             raycastManager.Raycast(ray, hits, TrackableType.FeaturePoint);
8.             if (Input.touchCount == 1 && Input.GetTouch(0).phase == TouchPhase.Began && PrefabToPlace != null)
9.             {
10.                 Pose p = hits[0].pose;
11.                 _ShowAndroidToastMessage("Hit at : " + (p.position.z) +  " ciunt L "+ hits.Count);
12.                 var obj = Instantiate(PrefabToPlace, pose.position, pose.rotation);
13.                 obj.name = PrefabToPlace.name;
14.                 obj.transform.parent = ParentAR.transform;
15.  
16.                 PrefabToPlace = null;
17.  
18.             }
19.         }

Please suggest a way to achieve this.

 

hi everyone ,
i'm still looking for a solution for this problem : knowing the exact real-world location of a particular point cloud particle.
any idea ?
thanks

 

Here is an example script. Drop references to Raycast Manager and Origin and you're good to go.

Code (CSharp):

1. using System.Collections.Generic;
2. using System.Linq;
3. using JetBrains.Annotations;
4. using UnityEngine;
5. using UnityEngine.XR.ARFoundation;
6. using UnityEngine.XR.ARSubsystems;
7. using Input = UnityEngine.Input;
8.  
9.  
10. namespace ARFoundationRemoteExample.Runtime {
11.     public class MultiTouchRaycastExample : MonoBehaviour {
12.         [SerializeField] ARRaycastManager raycastManager = null;
13.         [SerializeField] ARSessionOrigin origin = null;
14.         [CanBeNull] [SerializeField] GameObject optionalPointerPrefab = null;
15.         [SerializeField] bool disablePointersOnTouchEnd = false;
16.         [SerializeField] TrackableType trackableTypeMask = TrackableType.FeaturePoint;
17.  
18.         readonly Dictionary<int, Transform> pointers = new Dictionary<int, Transform>();
19.  
20.  
21.         void Update() {
22.             for (int i = 0; i < Input.touchCount; i++) {  
23.                 var touch = Input.GetTouch(i);
24.                 var pointer = getPointer(touch.fingerId);
25.                 var touchPhase = touch.phase;
26.                 if (touchPhase == TouchPhase.Ended || touchPhase == TouchPhase.Canceled) {
27.                     if (disablePointersOnTouchEnd) {
28.                         pointer.gameObject.SetActive(false);
29.                     }
30.                 } else {
31.                     var ray = origin.camera.ScreenPointToRay(touch.position);
32.                     var hits = new List<ARRaycastHit>();
33.                     var hasHit = raycastManager.Raycast(ray, hits, trackableTypeMask);
34.                     if (hasHit) {
35.                         var pose = hits.First().pose;
36.                         pointer.position = pose.position;
37.                         pointer.rotation = pose.rotation;
38.                     }
39.                    
40.                     pointer.gameObject.SetActive(hasHit);
41.                 }
42.             }
43.         }
44.  
45.         Transform getPointer(int fingerId) {
46.             if (pointers.TryGetValue(fingerId, out var existing)) {
47.                 return existing;
48.             } else {
49.                 var newPointer = createNewPointer();
50.                 pointers[fingerId] = newPointer;
51.                 return newPointer;
52.             }
53.         }
54.        
55.         Transform createNewPointer() {
56.             var result = instantiatePointer();
57.             result.parent = transform;
58.             return result;
59.         }
60.  
61.         Transform instantiatePointer() {
62.             if (optionalPointerPrefab != null) {
63.                 return Instantiate(optionalPointerPrefab).transform;
64.             } else {
65.                 var result = GameObject.CreatePrimitive(PrimitiveType.Sphere).transform;
66.                 result.localScale = Vector3.one * 0.05f;
67.                 return result;
68.             }
69.         }
70.     }
71. }
72.