update

Assets/FPS/Scripts/Game/Actor.cs

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+using UnityEngine;
+
+namespace Unity.FPS.Game
+{
+    // This class contains general information describing an actor (player or enemies).
+    // It is mostly used for AI detection logic and determining if an actor is friend or foe
+    public class Actor : MonoBehaviour
+    {
+        [Tooltip("Represents the affiliation (or team) of the actor. Actors of the same affiliation are friendly to each other")]
+        public int Affiliation;
+
+        [Tooltip("Represents point where other actors will aim when they attack this actor")]
+        public Transform AimPoint;
+
+        ActorsManager m_ActorsManager;
+
+        void Start()
+        {
+            m_ActorsManager = GameObject.FindFirstObjectByType<ActorsManager>();
+            DebugUtility.HandleErrorIfNullFindObject<ActorsManager, Actor>(m_ActorsManager, this);
+
+            // Register as an actor
+            if (!m_ActorsManager.Actors.Contains(this))
+            {
+                m_ActorsManager.Actors.Add(this);
+            }
+        }
+
+        void OnDestroy()
+        {
+            // Unregister as an actor
+            if (m_ActorsManager)
+            {
+                m_ActorsManager.Actors.Remove(this);
+            }
+        }
+    }
+}