rework dimensions and orientation into Placement, optimise requirements to work on previous candidates, use vec3 for positions

Assets/Engine/Runtime/Engine.cs

@@ -56,7 +56,7 @@ namespace EscapeRoomEngine.Engine.Runtime
             Logger.Log("Generating room...", LogType.RoomGeneration);
             
             // get the last entrance from the newest room or create a spawn passage with no entrance door for where the player will start
-            var entrance = NumberOfRooms > 0 ? _rooms.Last().exit : new Passage(new DoorModule(null, theme.spawnDoor), true);
+            var entrance = NumberOfRooms > 0 ? _rooms.Last().exit : new Passage(new DoorModule(null, theme.spawnDoor));
             
             var room = new Room(entrance);
             _rooms.Add(room);