feat: IPhysicsEngine2D Events

Engine.Physics2D/Abstract/IPhysicsEngine2D.cs

@@ -5,6 +5,16 @@ namespace Syntriax.Engine.Physics2D.Abstract;
 /// </summary>
 public interface IPhysicsEngine2D
 {
+    /// <summary>
+    /// Event triggered when the <see cref="IPhysicsEngine2D"/> has done a single physics iteration.
+    /// </summary>
+    event OnPhysicsIterationDelegate? OnPhysicsIteration;
+
+    /// <summary>
+    /// Event triggered when the <see cref="IPhysicsEngine2D"/> has done a full physics step/>.
+    /// </summary>
+    event OnPhysicsStepDelegate? OnPhysicsStep;
+
     /// <summary>
     /// The number of iterations the <see cref="IPhysicsEngine2D"/> performs per step.
     /// </summary>
@@ -15,4 +25,7 @@ public interface IPhysicsEngine2D
     /// </summary>
     /// <param name="deltaTime">The time step.</param>
     void Step(float deltaTime);
+
+    delegate void OnPhysicsIterationDelegate(IPhysicsEngine2D sender, float iterationDeltaTime);
+    delegate void OnPhysicsStepDelegate(IPhysicsEngine2D sender, float stepDeltaTime);
 }

Engine.Physics2D/PhysicsEngine2D.cs

@@ -1,6 +1,5 @@
 using System.Collections.Generic;
 
-using Syntriax.Engine.Core;
 using Syntriax.Engine.Core.Abstract;
 using Syntriax.Engine.Physics2D.Abstract;
 
@@ -8,6 +7,9 @@ namespace Syntriax.Engine.Physics2D;
 
 public class PhysicsEngine2D : IPhysicsEngine2D
 {
+    public event IPhysicsEngine2D.OnPhysicsIterationDelegate? OnPhysicsIteration = null;
+    public event IPhysicsEngine2D.OnPhysicsStepDelegate? OnPhysicsStep = null;
+
     private readonly List<IRigidBody2D> rigidBodies = new(32);
     private readonly List<ICollider2D> colliders = new(64);
 
@@ -96,7 +98,9 @@ public class PhysicsEngine2D : IPhysicsEngine2D
                     }
                 }
             }
+            OnPhysicsIteration?.Invoke(this, intervalDeltaTime);
         }
+        OnPhysicsStep?.Invoke(this, deltaTime);
     }
 
     private static void StepRigidBody(IRigidBody2D rigidBody, float intervalDeltaTime)

Engine.Physics2D/PhysicsEngine2DCollector.cs

@@ -9,6 +9,8 @@ public class PhysicsEngine2DCollector : IPhysicsEngine2D, IAssignableGameManager
     public event IAssignable.OnUnassignedDelegate? OnUnassigned = null;
     public event IAssignableGameManager.OnGameManagerAssignedDelegate? OnGameManagerAssigned = null;
 
+    public event IPhysicsEngine2D.OnPhysicsIterationDelegate? OnPhysicsIteration = null;
+    public event IPhysicsEngine2D.OnPhysicsStepDelegate? OnPhysicsStep = null;
 
     private int _iterationPerStep = 1;
 
@@ -82,10 +84,14 @@ public class PhysicsEngine2DCollector : IPhysicsEngine2D, IAssignableGameManager
                     }
                 }
             }
+
+            OnPhysicsIteration?.Invoke(this, intervalDeltaTime);
         }
 
         foreach (IPhysicsUpdate physicsUpdate in physicsUpdateCollector)
             physicsUpdate.PhysicsUpdate(deltaTime);
+
+        OnPhysicsStep?.Invoke(this, deltaTime);
     }
 
     private static void StepRigidBody(IRigidBody2D rigidBody, float intervalDeltaTime)