From ffa0128813abbb9f79ea99cc0e116fa0af5577e7 Mon Sep 17 00:00:00 2001
From: Syntriax <syntriax@gmail.com>
Date: Thu, 26 Sep 2024 18:55:15 +0300
Subject: [PATCH] feat: IPhysicsUpdate

---
 Engine.Physics2D/Abstract/IPhysicsUpdate.cs  | 15 +++++++++++++++
 Engine.Physics2D/PhysicsEngine2DCollector.cs |  6 ++++++
 2 files changed, 21 insertions(+)
 create mode 100644 Engine.Physics2D/Abstract/IPhysicsUpdate.cs

diff --git a/Engine.Physics2D/Abstract/IPhysicsUpdate.cs b/Engine.Physics2D/Abstract/IPhysicsUpdate.cs
new file mode 100644
index 0000000..c5ac3cf
--- /dev/null
+++ b/Engine.Physics2D/Abstract/IPhysicsUpdate.cs
@@ -0,0 +1,15 @@
+using Syntriax.Engine.Core.Abstract;
+
+namespace Syntriax.Engine.Physics2D.Abstract;
+
+/// <summary>
+/// Represents a <see cref="IBehaviour"/> that listens to physics simulation update phase.
+/// </summary>
+public interface IPhysicsUpdate : IBehaviour
+{
+    /// <summary>
+    /// Updates the physics state of the object based on the elapsed time since the last update.
+    /// </summary>
+    /// <param name="delta">The time elapsed since the last physics update, typically in seconds.</param>
+    void PhysicsUpdate(float delta);
+}
diff --git a/Engine.Physics2D/PhysicsEngine2DCollector.cs b/Engine.Physics2D/PhysicsEngine2DCollector.cs
index 0cc60ab..c7eb131 100644
--- a/Engine.Physics2D/PhysicsEngine2DCollector.cs
+++ b/Engine.Physics2D/PhysicsEngine2DCollector.cs
@@ -17,6 +17,7 @@ public class PhysicsEngine2DCollector : IPhysicsEngine2D, IAssignableGameManager
 
     protected BehaviourCollector<IRigidBody2D> rigidBodyCollector = new();
     protected BehaviourCollector<ICollider2D> colliderCollector = new();
+    protected BehaviourCollector<IPhysicsUpdate> physicsUpdateCollector = new();
 
 
     public int IterationPerStep { get => _iterationPerStep; set => _iterationPerStep = value < 1 ? 1 : value; }
@@ -82,6 +83,9 @@ public class PhysicsEngine2DCollector : IPhysicsEngine2D, IAssignableGameManager
                 }
             }
         }
+
+        foreach (IPhysicsUpdate physicsUpdate in physicsUpdateCollector)
+            physicsUpdate.PhysicsUpdate(deltaTime);
     }
 
     private static void StepRigidBody(IRigidBody2D rigidBody, float intervalDeltaTime)
@@ -98,6 +102,7 @@ public class PhysicsEngine2DCollector : IPhysicsEngine2D, IAssignableGameManager
         if (GameManager is not null)
             return false;
 
+        physicsUpdateCollector.Assign(gameManager);
         colliderCollector.Assign(gameManager);
         rigidBodyCollector.Assign(gameManager);
 
@@ -112,6 +117,7 @@ public class PhysicsEngine2DCollector : IPhysicsEngine2D, IAssignableGameManager
         if (GameManager is null)
             return false;
 
+        physicsUpdateCollector.Unassign();
         colliderCollector.Unassign();
         rigidBodyCollector.Unassign();