SOOQANAHOOI

ublic class CustomRaycaster : MonoBehaviour
{
    public GameObject hovered;
    public GameObject hitObject;
    public enum HoverState{Hover, None};
    public HoverState hover_state = HoverState.None;

    void Update ()
    {
        bool isHit;
        PointerEventData pointerData = new PointerEventData(EventSystem.current);
        pointerData.position = Input.mousePosition;

        List<RaycastResult> results = new List<RaycastResult>();
        EventSystem.current.RaycastAll(pointerData, results);

        if (results.Count > 0)
        {
            Debug.Log ("UI");
            hitObject = results[0].gameObject;
            isHit = true;
        }
        else
        {
            RaycastHit hitInfo = new RaycastHit();
            Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
            isHit = (Physics.Raycast(ray, out hitInfo));
            if (isHit)
            {
                Debug.Log ("Object");
                hitObject = hitInfo.collider.gameObject;
            }
        }
        Hover(isHit);
    }

    protected void Hover(bool isHit)
    {
        if (isHit) //it is a hit - if new hit, change hovered
        {
            if (hover_state == HoverState.None)
            {
                hitObject.SendMessage("OnMouseEnter", SendMessageOptions.DontRequireReceiver);
                hovered = hitObject;
            }
            hover_state = HoverState.Hover;
        }
        else
        {
            if (hover_state == HoverState.Hover)
            {
                hovered.SendMessage("OnMouseExit", SendMessageOptions.DontRequireReceiver);
            }
            hover_state = HoverState.None;
        }
        if (hover_state == HoverState.Hover)
        {
            hitObject.SendMessage("OnMouseOver", SendMessageOptions.DontRequireReceiver);
        }
    }
}