feat: Added Basic Camera

Engine.Core/GameManager.cs

@@ -12,6 +12,7 @@ namespace Syntriax.Engine.Core;
 
 public class GameManager : IEntity
 {
+    public Action<GameManager>? OnCameraChanged { get; set; } = null;
     public Action<IInitialize>? OnInitialized { get; set; } = null;
     public Action<IInitialize>? OnFinalized { get; set; } = null;
     public Action<IAssignable>? OnUnassigned { get; set; } = null;
@@ -24,6 +25,7 @@ public class GameManager : IEntity
     private IStateEnable _stateEnable = null!;
     private GameObjectFactory _gameObjectFactory = null!;
     private bool _initialized = false;
+    private ICamera _camera = null!;
 
     private GameObjectFactory GameObjectFactory
     {
@@ -52,6 +54,19 @@ public class GameManager : IEntity
         }
     }
 
+    public ICamera Camera
+    {
+        get => _camera;
+        set
+        {
+            if (_camera == value)
+                return;
+
+            _camera = value;
+            OnCameraChanged?.Invoke(this);
+        }
+    }
+
     public void RegisterGameObject(IGameObject gameObject)
     {
         if (_gameObjects.Contains(gameObject))
@@ -136,7 +151,7 @@ public class GameManager : IEntity
 
     public void Draw(SpriteBatch spriteBatch)
     {
-        spriteBatch.Begin();
+        spriteBatch.Begin(SpriteSortMode.Deferred, transformMatrix: Camera.MatrixTransform);
 
         foreach (var drawable in _drawables)
             drawable.Draw(spriteBatch);