Add collisions to A2 corridors

Start implementation of fading ambient audio in/out on level load

Zennysoft.Game.Ma/src/map/dungeon/code/Altar.cs

@@ -1,14 +1,14 @@
 using Chickensoft.AutoInject;
 using Chickensoft.Introspection;
 using Godot;
-using System.Collections.Immutable;
 using System.Linq;
+using Zennysoft.Game.Abstractions;
 using Zennysoft.Ma.Adapter;
 
 namespace Zennysoft.Game.Ma;
 
 [Meta(typeof(IAutoNode))]
-public partial class Altar : Node3D, IDungeonFloor
+public partial class Altar : SpecialFloor, IDungeonFloor
 {
   public override void _Notification(int what) => this.Notify(what);
 
@@ -22,18 +22,26 @@ public partial class Altar : Node3D, IDungeonFloor
 
   [Node] private Area3D NoExitArea { get; set; } = default!;
 
-  public ImmutableList<IDungeonRoom> Rooms => [];
+  [Node] private Node DimmableAudio { get; set; } = default!;
 
   [Export] public Resource Dialogue { get; set; } = default!;
 
-  public bool FloorIsLoaded { get; set; }
-
   public void OnResolved()
   {
     Show();
     Exit.AreaEntered += Exit_AreaEntered;
     NoExitArea.AreaEntered += NoExitArea_AreaEntered;
     FloorIsLoaded = true;
+    var dimmableAudio = DimmableAudio.GetChildren().OfType<IDimmableAudioStreamPlayer>();
+    foreach (var dimmable in dimmableAudio)
+      dimmable.FadeIn();
+  }
+
+  public override void FadeOutAudio()
+  {
+    var dimmableAudio = DimmableAudio.GetChildren().OfType<IDimmableAudioStreamPlayer>();
+    foreach (var dimmable in dimmableAudio)
+      dimmable.FadeOut();
   }
 
   private void _player_PointUpFinished()
@@ -53,7 +61,4 @@ public partial class Altar : Node3D, IDungeonFloor
   }
 
   public void ExitReached() => Game.FloorExitReached();
-  public void InitializeDungeon() { return; }
-
-  public (Vector3 Rotation, Vector3 Position) GetPlayerSpawnPoint() { return (PlayerSpawnPoint.Rotation, new Vector3(PlayerSpawnPoint.GlobalPosition.X, 0, PlayerSpawnPoint.GlobalPosition.Z)); }
 }