How to get the component of an object received by raycast?

Question

Unity

There is the following code:

private void Attack()
{
    if (Input.GetMouseButtonDown(0))
    {
        Ray ray = Camera.main.ScreenPointToRay(new Vector2(Input.mousePosition.x, Input.mousePosition.y));
        RaycastHit _hit;
        if (Physics.Raycast(ray, out _hit))
        {
            if (_hit.collider.tag == "tree")
            {
                Hp tt = _hit.GetComponent("Hp") as Hp;
                if (tt != null)
                {
                    tt._curHealth -= 1;
                }
                Debug.Log("Этот объект с тэгом tree");
            }
        }
    }
}

Question: why can't I get the component from _hit? Maybe I'm doing something wrong?

Answer 1

RaycastHit is a struct that does not have a GetComponent method. RaycastHit.transform has such a method :

private void Attack()
{
    if (Input.GetMouseButtonDown(0))
    {
        Ray ray = Camera.main.ScreenPointToRay(new Vector2(Input.mousePosition.x, Input.mousePosition.y));
        RaycastHit _hit;
        if (Physics.Raycast(ray, out _hit))
        {
            if (_hit.collider.tag == "tree")
            {
                Hp tt = _hit.transform.GetComponent<Hp>();
                if (tt != null)
                {
                    tt._curHealth -= 1;
                }
                Debug.Log("Этот объект с тэгом tree");
            }
        }
    }
}

And don't use GetComponent with a string argument, use the generic method like above, otherwise your code will break if you decide to rename the class.