How can Raycast interact with UI elements?

Unity Engine
1

I created a Raycast that shoots from an object(not main camera) and I want it to hit UI elements. Example below.

1601×714 152 KB

UI outlined in orange, big grey plane is a test object, red head is placed upon user’s head and green is DrawRay of my raycast attached to an eye. I am trying to make it so user looks at a UI button and raycast can hit that button.

I’ve been playing around with Graphic raycast but nothing seems to work. Grey plane is still being hit by the raycast. I tried playing with OnPointerEnter but the thing is that my eye raycast is not a mouse/finger touch and is a second pointer.

Any ideas how to make it work with either isPointerOverGameObject or Graphic Raycaster or any other method?? Or how to create a second pointer that will be the eye raycast?
Current code below.

private void FixedUpdate()
{
    GraphicRaycaster gr = this.GetComponent<GraphicRaycaster>();

    PointerEventData pointerData = new PointerEventData(EventSystem.current);

    pointerData.position = Input.mousePosition;

    List<RaycastResult> results = new List<RaycastResult>();
    gr.Raycast(pointerData, results);
    //EventSystem.current.RaycastAll(pointerData, results);
    if (results.Count > 0)
    {
        if (results[0].gameObject.tag == "Test tag")
        {
            Debug.Log("test");
        }
    }




    //----- Failed Graphic raycast experiments above; working RaycastHit below --------


    RaycastHit hit;


        Debug.DrawRay(transform.position, transform.forward * -10000f, Color.green);

        if (Physics.Raycast(transform.position, transform.forward * -1, out hit))
        {

            Debug.Log(hit.transform.name);
        }



}
unity3d raycasting
2

You should create a input module and use the EventSystem raycast methods instead