public void CameraUpdateFollow(Camera camera, float movement_time, Vector3 offset)
    {
        for (int i = 0; i < following_items.Count; ++i)
        {
            CameraFollowItem curr_item = following_items[i];

            if (curr_item.GetCamera() == camera)
            {
                curr_item.SetMovementTime(movement_time);
                curr_item.SetOffset(offset);
            }
        }
    }