Introducing samples for ARFoundation 2.2 and ARKit 3.

Assets/Scripts/Logger.cs

+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Text;
+using UnityEngine;
+using UnityEngine.UI;
+
+public class Logger : MonoBehaviour
+{
+    [SerializeField]
+    Text m_LogText;
+    public Text logText
+    {
+        get { return s_LogText; }
+        set
+        {
+            m_LogText = value;
+            s_LogText = value;
+        }
+    }
+
+    [SerializeField]
+    int m_VisibleMessageCount = 40;
+    public int visibleMessageCount
+    {
+        get { return s_VisibleMessageCount; }
+        set
+        {
+            m_VisibleMessageCount = value;
+            s_VisibleMessageCount = value;
+        }
+    }
+
+    int m_LastMessageCount;
+
+    static int s_VisibleMessageCount;
+
+    static Text s_LogText;
+
+    static List<string> s_Log = new List<string>();
+
+    static StringBuilder s_StringBuilder = new StringBuilder();
+
+    void Awake()
+    {
+        s_LogText = m_LogText;
+        s_VisibleMessageCount = m_VisibleMessageCount;
+        Log("Log console initialized.");
+    }
+
+    void Update()
+    {
+        lock (s_Log)
+        {
+            if (m_LastMessageCount != s_Log.Count)
+            {
+                s_StringBuilder.Clear();
+                var startIndex = Mathf.Max(s_Log.Count - s_VisibleMessageCount, 0);
+                for (int i = startIndex; i < s_Log.Count; ++i)
+                {
+                    s_StringBuilder.Append($"{i:000}> {s_Log[i]}\n");
+                }
+
+                s_LogText.text = s_StringBuilder.ToString();
+            }
+
+            m_LastMessageCount = s_Log.Count;
+        }
+    }
+
+    public static void Log(string message)
+    {
+        lock (s_Log)
+        {
+            if (s_Log == null)
+                s_Log = new List<string>();
+
+            s_Log.Add(message);
+        }
+    }
+}

Assets/Scripts/Logger.cs.meta

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Assets/Scripts/ReferencePointCreator.cs

+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.XR.ARFoundation;
+using UnityEngine.XR.ARSubsystems;
+
+[RequireComponent(typeof(ARReferencePointManager))]
+[RequireComponent(typeof(ARRaycastManager))]
+public class ReferencePointCreator : MonoBehaviour
+{
+    public void RemoveAllReferencePoints()
+    {
+        foreach (var referencePoint in m_ReferencePoints)
+        {
+            m_ReferencePointManager.RemoveReferencePoint(referencePoint);
+        }
+        m_ReferencePoints.Clear();
+    }
+
+    void Awake()
+    {
+        m_RaycastManager = GetComponent<ARRaycastManager>();
+        m_ReferencePointManager = GetComponent<ARReferencePointManager>();
+        m_ReferencePoints = new List<ARReferencePoint>();
+    }
+
+    void Update()
+    {
+        if (Input.touchCount == 0)
+            return;
+
+        var touch = Input.GetTouch(0);
+        if (touch.phase != TouchPhase.Began)
+            return;
+
+        if (m_RaycastManager.Raycast(touch.position, s_Hits, TrackableType.FeaturePoint))
+        {
+            // Raycast hits are sorted by distance, so the first one
+            // will be the closest hit.
+            var hitPose = s_Hits[0].pose;
+            var referencePoint = m_ReferencePointManager.AddReferencePoint(hitPose);
+            if (referencePoint == null)
+            {
+                Logger.Log("Error creating reference point");
+            }
+            else
+            {
+                m_ReferencePoints.Add(referencePoint);
+            }
+        }
+    }
+
+    static List<ARRaycastHit> s_Hits = new List<ARRaycastHit>();
+
+    List<ARReferencePoint> m_ReferencePoints;
+
+    ARRaycastManager m_RaycastManager;
+
+    ARReferencePointManager m_ReferencePointManager;
+}

Assets/Scripts/ReferencePointCreator.cs.meta

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