Add connecting room method

src/ManiaMap.Tests/TestDoorConnection.cs

@@ -36,5 +36,22 @@ public void TestGetDoorPosition()
                 Assert.IsNull(position);
             }
         }
+
+        [TestMethod]
+        public void TestGetConnectingRoom()
+        {
+            var results = Samples.BigLayoutSample.Generate(12345, Console.WriteLine);
+            Assert.IsTrue(results.Success);
+            var layout = results.GetOutput<Layout>("Layout");
+
+            foreach (var connection in layout.DoorConnections.Values)
+            {
+                var toRoom = connection.ToRoom;
+                var fromRoom = connection.FromRoom;
+                Assert.AreEqual(connection.GetConnectingRoom(toRoom), fromRoom);
+                Assert.AreEqual(connection.GetConnectingRoom(fromRoom), toRoom);
+                Assert.AreEqual(connection.GetConnectingRoom(new Uid(int.MaxValue)), new Uid(-1, -1, -1));
+            }
+        }
     }
 }

src/ManiaMap/DoorConnection.cs

@@ -97,5 +97,19 @@ public DoorPosition GetDoorPosition(Uid roomId)
                 return ToDoor;
             return null;
         }
+
+        /// <summary>
+        /// Returns the ID of the connecting room, e.g. the "to room" if the "from room" ID is specified and vice versa.
+        /// If the specified room ID does not exist in the connection, returns Uid(-1, -1, -1).
+        /// </summary>
+        /// <param name="roomId">The room ID.</param>
+        public Uid GetConnectingRoom(Uid roomId)
+        {
+            if (roomId == FromRoom)
+                return ToRoom;
+            if (roomId == ToRoom)
+                return FromRoom;
+            return new Uid(-1, -1, -1);
+        }
     }
 }

src/ManiaMap/Generators/LayoutGraphSelector.cs

@@ -16,7 +16,7 @@ public class LayoutGraphSelector : IPipelineStep
         /// A delegate returning a LayoutGraph.
         /// </summary>
         public delegate LayoutGraph LayoutGraphDelegate();
-        
+
         /// <summary>
         /// Draws a random layout graph and adds a copy to the results output dictionary.
         /// 

src/ManiaMap/ManiaMap.csproj

@@ -14,7 +14,7 @@
     <RepositoryUrl>https://github.com/mpewsey/ManiaMap</RepositoryUrl>
     <PackageTags>procedural-generation;roguelike;metroidvania;videogames</PackageTags>
     <PackageLicenseExpression>BSD-3-Clause</PackageLicenseExpression>
-	<VersionPrefix>2.4.0</VersionPrefix>
+	<VersionPrefix>2.5.0</VersionPrefix>
 	<Configurations>Debug;Release;Unity</Configurations>
 	<PackageProjectUrl>https://mpewsey.github.io/ManiaMap/</PackageProjectUrl>
 	<GenerateDocumentationFile>True</GenerateDocumentationFile>