diff --git a/Game/Physics2D/Collider2DAABBBehaviour.cs b/Game/Physics2D/Collider2DAABBBehaviour.cs
index cfabc2a..bd1f73c 100644
--- a/Game/Physics2D/Collider2DAABBBehaviour.cs
+++ b/Game/Physics2D/Collider2DAABBBehaviour.cs
@@ -14,6 +14,11 @@ public class Collider2DAABBBehaviour(Vector2 lowerBound, Vector2 upperBound) : B
     public Vector2 LowerBound { get; } = lowerBound;
     public Vector2 UpperBound { get; } = upperBound;
 
+
+    private Vector2 worldLowerBound = lowerBound;
+    private Vector2 worldUpperBound = upperBound;
+
+
     private IRigidBody2D? _rigidBody2D = null;
 
     public IRigidBody2D? RigidBody2D
@@ -35,8 +40,8 @@ public class Collider2DAABBBehaviour(Vector2 lowerBound, Vector2 upperBound) : B
 
     public bool CheckCollision(Vector2 point, ICollider2D otherCollider)
     {
-        if (point.X >= LowerBound.X + Transform.Position.X && point.X <= UpperBound.X + Transform.Position.X &&
-            point.Y >= LowerBound.Y + Transform.Position.Y && point.Y <= UpperBound.Y + Transform.Position.Y)
+        if (point.X >= worldLowerBound.X && point.X <= worldUpperBound.X &&
+            point.Y >= worldLowerBound.Y && point.Y <= worldUpperBound.Y)
             return true;
 
         return false;
@@ -44,6 +49,7 @@ public class Collider2DAABBBehaviour(Vector2 lowerBound, Vector2 upperBound) : B
 
     public void Recalculate()
     {
-        throw new NotImplementedException();
+        worldLowerBound = LowerBound + Transform.Position;
+        worldUpperBound = UpperBound + Transform.Position;
     }
 }
diff --git a/Game/Physics2D/PhysicsEngine2D.cs b/Game/Physics2D/PhysicsEngine2D.cs
index c0a4ad7..59b1d93 100644
--- a/Game/Physics2D/PhysicsEngine2D.cs
+++ b/Game/Physics2D/PhysicsEngine2D.cs
@@ -45,7 +45,7 @@ public class PhysicsEngine2D : IPhysicsEngine2D
     {
         float intervalDeltaTime = deltaTime / IterationCount;
 
-        for (int i = 0; i < IterationCount; i++)
+        for (int iterationIndex = 0; iterationIndex < IterationCount; iterationIndex++)
         {
             foreach (var rigidBody in rigidBodies)
                 StepRigidBody(rigidBody, intervalDeltaTime);
@@ -54,6 +54,15 @@ public class PhysicsEngine2D : IPhysicsEngine2D
             foreach (var collider in colliders)
                 collider.Recalculate();
 
+            for (int ix = colliders.Count - 1; ix >= 0; ix--)
+            {
+                ICollider2D colliderX = colliders[ix];
+                for (int iy = colliders.Count - 1; iy >= ix + 1; iy--)
+                {
+                    ICollider2D colliderY = colliders[iy];
+
+                }
+            }
         }
     }