1 files changed, 39 insertions, 0 deletions
diff --git a/Other/AstarPathfindingDemo/Packages/com.arongranberg.astar/Utilities/UnityReferenceHelper.cs b/Other/AstarPathfindingDemo/Packages/com.arongranberg.astar/Utilities/UnityReferenceHelper.cs
new file mode 100644
index 0000000..e4d895c
--- /dev/null
+++ b/Other/AstarPathfindingDemo/Packages/com.arongranberg.astar/Utilities/UnityReferenceHelper.cs
@@ -0,0 +1,39 @@
+using Pathfinding.Util;
+using UnityEngine;
+
+namespace Pathfinding {
+	[ExecuteInEditMode]
+	/// <summary>
+	/// Helper class to keep track of references to GameObjects.
+	/// Does nothing more than to hold a GUID value.
+	/// </summary>
+	[HelpURL("https://arongranberg.com/astar/documentation/stable/unityreferencehelper.html")]
+	public class UnityReferenceHelper : MonoBehaviour {
+		[HideInInspector]
+		[SerializeField]
+		private string guid;
+
+		public string GetGUID() => guid;
+
+		public void Awake () {
+			Reset();
+		}
+
+		public void Reset () {
+			if (string.IsNullOrEmpty(guid)) {
+				guid = Pathfinding.Util.Guid.NewGuid().ToString();
+				Debug.Log("Created new GUID - " + guid, this);
+			} else if (gameObject.scene.name != null) {
+				// Create a new GUID if there are duplicates in the scene.
+				// Don't do this if this is a prefab (scene.name == null)
+				foreach (UnityReferenceHelper urh in UnityCompatibility.FindObjectsByTypeUnsorted<UnityReferenceHelper>()) {
+					if (urh != this && guid == urh.guid) {
+						guid = Pathfinding.Util.Guid.NewGuid().ToString();
+						Debug.Log("Created new GUID - " + guid, this);
+						return;
+					}
+				}
+			}
+		}
+	}
+}