MrGravity.Level.UpdateCollisionMatrix C# (CSharp) Méthode

        private void UpdateCollisionMatrix(GameObject obj, Vector2 oldPosition)
        {
            var newPosition = GridSpace.GetGridCoord(obj.MPosition);
            if (oldPosition.Equals(newPosition)) return;

            _mCollisionMatrix[(int)oldPosition.Y][(int)oldPosition.X].Remove(obj);
            if(!_mCollisionMatrix[(int)newPosition.Y][(int)newPosition.X].Contains(obj))
                _mCollisionMatrix[(int)newPosition.Y][(int)newPosition.X].Add(obj);
        }