refactor: rewritten MonoGameWindow to take in a universe as a constructor parameter

Engine.Integration/Engine.Integration.MonoGame/MonoGameWindow.cs

@@ -5,38 +5,31 @@ using Syntriax.Engine.Core;
 
 namespace Syntriax.Engine.Integration.MonoGame;
 
-public abstract class MonoGameWindow : Game
+public class MonoGameWindow : Game
 {
     public GraphicsDeviceManager Graphics { get; protected set; } = null!;
     public IUniverse Universe { get; protected set; } = null!;
     public ColorRGB BackgroundColor { get; set; } = new ColorRGB(35, 20, 35);
 
-    public MonoGameWindow()
+    public MonoGameWindow(IUniverse? universe = null)
     {
         Preserver.Preserve();
         Graphics = new GraphicsDeviceManager(this);
         Content.RootDirectory = "Content";
         IsMouseVisible = true;
-        Universe = new Universe();
+        Universe = universe ?? new Universe();
+
+        Universe.InstantiateUniverseObject().SetUniverseObject("Window Container")
+            .BehaviourController.AddBehaviour<MonoGameWindowContainer>(this);
     }
 
-    protected abstract void PopulateUniverse(IUniverse universe);
     protected override void Initialize()
     {
         Universe.Initialize();
-        Universe.InstantiateUniverseObject().SetUniverseObject("Window Container")
-            .BehaviourController.AddBehaviour<MonoGameWindowContainer>(this);
-
-        PopulateUniverse(Universe);
 
         base.Initialize();
     }
 
-    protected override void LoadContent()
-    {
-        // TODO: use this.Content to load your game content here
-    }
-
     protected override void Update(GameTime gameTime)
     {
         Universe.Update(gameTime.ToEngineTime());