Decoupled IDs from the spawning system.

Assets/Scenes/TestMap.unity

@@ -844,6 +844,7 @@ GameObject:
   m_Component:
   - component: {fileID: 605817615}
   - component: {fileID: 605817614}
+  - component: {fileID: 605817616}
   m_Layer: 0
   m_Name: World Root
   m_TagString: Untagged
@@ -862,6 +863,7 @@ MonoBehaviour:
   m_Script: {fileID: 11500000, guid: fb83f65c40e344c3b9bc2d83195fe69d, type: 3}
   m_Name: 
   m_EditorClassIdentifier: 
+  SyncDB: {fileID: 605817616}
   PCEntityPrefab: {fileID: 1306609719649024, guid: e8761b9491a974d1780e60dafbd372a2,
     type: 2}
   NPCEntityPrefab: {fileID: 1225554598977308, guid: 88dbba5a284f041afbfbb6e6f52935fa,
@@ -879,6 +881,17 @@ Transform:
   m_Father: {fileID: 0}
   m_RootOrder: 3
   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
+--- !u!114 &605817616
+MonoBehaviour:
+  m_ObjectHideFlags: 0
+  m_PrefabParentObject: {fileID: 0}
+  m_PrefabInternal: {fileID: 0}
+  m_GameObject: {fileID: 605817613}
+  m_Enabled: 1
+  m_EditorHideFlags: 0
+  m_Script: {fileID: 11500000, guid: 9d715320baa1f401ab0f46b603399dc3, type: 3}
+  m_Name: 
+  m_EditorClassIdentifier: 
 --- !u!1 &679442845
 GameObject:
   m_ObjectHideFlags: 0

Assets/Scripts/Spawner.cs

@@ -3,18 +3,16 @@ using System.Collections.Generic;
 using UnityEngine;
 
 public class Spawner : MonoBehaviour {
+    public SyncDB SyncDB;
     public GameObject PCEntityPrefab;
     public GameObject NPCEntityPrefab;
 
-    private int LastID = 0;
-    private Dictionary<int, GameObject> SpawnedEntities = new Dictionary<int, GameObject>();
-
     /// <summary>
     /// Spawns an entity and returns that entity.
     /// </summary>
     /// <param name="type">Type.</param>
     /// <param name="position">Position.</param>
-    public GameObject Spawn(EntityType type, Vector3 position) {
+    public GameObject Spawn(EntityType type, Vector3 position, uint[] ids) {
         GameObject Spawned = null;
         switch (type) {
         case EntityType.PC:
@@ -25,28 +23,18 @@ public class Spawner : MonoBehaviour {
             break;
         }
         if (Spawned != null) {
-            int ID = CreateID();
+            SyncDB.AddEntity(Spawned, ids);
-            Spawned.GetComponent<SyncBase>().ID = ID;
-            SpawnedEntities[ID] = Spawned;
         }
         return Spawned;
     }
 
-    public GameObject Get(int id) {
-        return SpawnedEntities[id];
-    }
-
     private void Start() {
-        Spawn(EntityType.PC, new Vector3());
+        Spawn(EntityType.PC, new Vector3(), new uint[]{ SyncDB.CreateID() });
     }
 
     private void Update() {
         if (Input.GetButtonDown("Jump") && !Term.IsVisible()) {
-            Spawn(EntityType.NPC, new Vector3(Random.Range(-1f, 1f), 0, Random.Range(-2f, 2f)));
+            Spawn(EntityType.NPC, new Vector3(Random.Range(-1f, 1f), 0, Random.Range(-2f, 2f)), new uint[]{ SyncDB.CreateID() });
         }
     }
-
-    private int CreateID() {
-        return LastID++;
-    }
 }

Assets/Scripts/SyncBase.cs

@@ -3,5 +3,5 @@ using System.Collections.Generic;
 using UnityEngine;
 
 public class SyncBase : MonoBehaviour {
-    public int ID;
+    public uint ID;
 }

Assets/Scripts/SyncDB.cs

@@ -0,0 +1,63 @@
+using System.Collections;
+using System.Collections.Generic;
+using System;
+using UnityEngine;
+
+public class SyncDB : MonoBehaviour {
+    private static readonly Type[] SyncableClasses = new Type[]{
+        typeof(Character)
+    };
+
+    private uint IDCounter = 0;
+    private Dictionary<uint, SyncBase> Database = new Dictionary<uint, SyncBase>();
+
+    public void AddEntity(GameObject gameObject, uint[] ids) {
+        int Index = 0;
+        for (int i = 0; i < SyncableClasses.Length; i++) {
+            SyncBase Syncable = (SyncBase) gameObject.GetComponent(SyncableClasses[i]);
+            if (Syncable != null) {
+                Syncable.ID = ids[Index];
+                Database[ids[Index++]] = Syncable;
+            }
+        }
+    }
+
+    public uint[] GetEntityIDs(GameObject gameObject) {
+        List<uint> IDs = new List<uint>();
+        for (int i = 0; i < SyncableClasses.Length; i++) {
+            SyncBase Syncable = (SyncBase) gameObject.GetComponent(SyncableClasses[i]);
+            if (Syncable != null) {
+                IDs.Add(Syncable.ID);
+            }
+        }
+        uint[] IDArray = new uint[IDs.Count];
+        for (int i = 0; i < IDs.Count; i++) {
+            IDArray[i] = IDs[i];
+        }
+        return IDArray;
+    }
+
+    public SyncBase Get(uint id) {
+        return Database[id];
+    }
+
+    public uint CreateID() {
+        uint ID;
+        try {
+            ID = IDCounter++;
+        } catch (OverflowException Ex) {
+            ID = 0;
+            IDCounter = 1;
+        }
+        while (Database.ContainsKey(ID) && Database.Keys.Count < uint.MaxValue && ID < uint.MaxValue) {
+            ID++;
+            if (ID < uint.MaxValue - 1) IDCounter = ID + 1;
+        }
+        if (Database.ContainsKey(ID)) {
+            // Somehow we've managed to fill up the whole database.
+            // I can't even imagine why or how.
+            Debug.LogError("!!!WARNING!!! The SyncDB is full. Update the game to use longs instead of uints. !!!WARNING!!!");
+        }
+        return ID;
+    }
+}

Assets/Scripts/SyncDB.cs.meta

@@ -0,0 +1,12 @@
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+guid: 9d715320baa1f401ab0f46b603399dc3
+timeCreated: 1494210838
+licenseType: Free
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: