refactor: behaviour collector Count and indexer accessors added

Engine.Core/Abstract/IBehaviourCollector.cs

@@ -1,5 +1,3 @@
-using System.Collections.Generic;
-
 namespace Syntriax.Engine.Core;
 
 /// <summary>
@@ -19,6 +17,16 @@ public interface IBehaviourCollector<T> : IHasUniverse where T : class
     /// </summary>
     event RemovedEventHandler? OnRemoved;
 
+    /// <summary>
+    /// Amount of <typeparamref name="T"/> collected.
+    /// </summary>
+    int Count { get; }
+
+    /// <summary>
+    /// Get a <typeparamref name="T"/> collected by it's index.
+    /// </summary>
+    T this[System.Index index] { get; }
+
     /// <summary>
     /// Delegate for handling the <see cref="OnCollected"/> event.
     /// </summary>

Engine.Core/ActiveBehaviourCollector.cs

@@ -1,4 +1,3 @@
-using System;
 using System.Collections;
 using System.Collections.Generic;
 
@@ -16,7 +15,6 @@ public class ActiveBehaviourCollector<T> : IBehaviourCollector<T> where T : clas
     protected readonly List<T> activeBehaviours = new(32);
     protected readonly Dictionary<IActive, T> monitoringActiveToBehaviour = new(32);
 
-    public IReadOnlyList<T> Behaviours => activeBehaviours;
     public IUniverse Universe { get; private set; } = null!;
 
     public ActiveBehaviourCollector() { }
@@ -117,4 +115,7 @@ public class ActiveBehaviourCollector<T> : IBehaviourCollector<T> where T : clas
         OnUnassigned?.Invoke(this);
         return true;
     }
+
+    public int Count => activeBehaviours.Count;
+    public T this[System.Index index] => activeBehaviours[index];
 }

Engine.Core/BehaviourCollector.cs

@@ -1,4 +1,3 @@
-using System;
 using System.Collections;
 using System.Collections.Generic;
 
@@ -14,7 +13,6 @@ public class BehaviourCollector<T> : IBehaviourCollector<T> where T : class
 
     protected readonly List<T> behaviours = new(32);
 
-    public IReadOnlyList<T> Behaviours => behaviours;
     public IUniverse Universe { get; private set; } = null!;
 
     public BehaviourCollector() { }
@@ -96,4 +94,7 @@ public class BehaviourCollector<T> : IBehaviourCollector<T> where T : class
         OnUnassigned?.Invoke(this);
         return true;
     }
+
+    public int Count => behaviours.Count;
+    public T this[System.Index index] => behaviours[index];
 }

Engine.Core/Systems/DrawManager.cs

@@ -11,20 +11,20 @@ public class DrawManager : UniverseObject
 
     private void OnPreDraw(IUniverse sender)
     {
-        for (int i = preDrawEntities.Behaviours.Count - 1; i >= 0; i--)
-            preDrawEntities.Behaviours[i].PreDraw();
+        for (int i = preDrawEntities.Count - 1; i >= 0; i--)
+            preDrawEntities[i].PreDraw();
     }
 
     private void OnDraw(IUniverse sender)
     {
-        for (int i = drawEntities.Behaviours.Count - 1; i >= 0; i--)
-            drawEntities.Behaviours[i].Draw();
+        for (int i = drawEntities.Count - 1; i >= 0; i--)
+            drawEntities[i].Draw();
     }
 
     private void OnPostDraw(IUniverse sender)
     {
-        for (int i = postDrawEntities.Behaviours.Count - 1; i >= 0; i--)
-            postDrawEntities.Behaviours[i].PostDraw();
+        for (int i = postDrawEntities.Count - 1; i >= 0; i--)
+            postDrawEntities[i].PostDraw();
     }
 
     protected override void OnEnteringUniverse(IUniverse universe)

Engine.Core/Systems/UpdateManager.cs

@@ -46,20 +46,20 @@ public class UpdateManager : UniverseObject
             toCallFirstFrameUpdates.RemoveAt(i);
         }
 
-        for (int i = preUpdateEntities.Behaviours.Count - 1; i >= 0; i--)
-            preUpdateEntities.Behaviours[i].PreUpdate();
+        for (int i = preUpdateEntities.Count - 1; i >= 0; i--)
+            preUpdateEntities[i].PreUpdate();
     }
 
     private void OnUpdate(IUniverse sender, UniverseTime engineTime)
     {
-        for (int i = updateEntities.Behaviours.Count - 1; i >= 0; i--)
-            updateEntities.Behaviours[i].Update();
+        for (int i = updateEntities.Count - 1; i >= 0; i--)
+            updateEntities[i].Update();
     }
 
     private void OnPostUpdate(IUniverse sender, UniverseTime engineTime)
     {
-        for (int i = postUpdateEntities.Behaviours.Count - 1; i >= 0; i--)
-            postUpdateEntities.Behaviours[i].PostUpdate();
+        for (int i = postUpdateEntities.Count - 1; i >= 0; i--)
+            postUpdateEntities[i].PostUpdate();
     }
 
     private void OnFirstFrameCollected(IBehaviourCollector<IFirstFrameUpdate> sender, IFirstFrameUpdate behaviourCollected)