connect multiple rooms with doors

Assets/Escape Room Engine/Engine/Scripts/Passage.cs

@@ -1,17 +1,47 @@
-namespace Escape_Room_Engine.Engine.Scripts
+using System;
+using Escape_Room_Engine.Engine.Scripts.Modules;
+using UnityEngine;
+using Logger = Escape_Room_Engine.Engine.Scripts.Utilities.Logger;
+using LogType = Escape_Room_Engine.Engine.Scripts.Utilities.LogType;
+
+namespace Escape_Room_Engine.Engine.Scripts
 {
     public class Passage
     {
         internal DoorModule fromOut, toIn;
+        /// <summary>
+        /// The room relative (<i>RR</i>) position of this passage.
+        /// </summary>
+        internal Vector2Int rrPosition;
+
+        internal Passage(DoorModule from)
+        {
+            ConnectFrom(from);
+        }
+
+        protected Passage() {}
 
         internal void ConnectFrom(DoorModule door)
         {
             fromOut = door;
+            rrPosition = fromOut.RrPosition;
+            
+            Logger.Log($"Connected passage from {door} at {rrPosition} (RR).", LogType.PassageConnection);
         }
 
-        internal void ConnectTo(DoorModule door)
+        internal virtual void ConnectTo(DoorModule door)
         {
+            if (fromOut == null)
+            {
+                throw new Exception("Cannot connect passage to entrance if it hasn't been connected to an exit first.");
+            }
+
             toIn = door;
+            
+            // to make sure the origin of the player doesn't move, the two doors must be placed in the same location
+            toIn.PlaceRoomRelative(rrPosition);
+            
+            Logger.Log($"Connected passage to {door} at {rrPosition} (RR).", LogType.PassageConnection);
         }
     }
 }