Why am I getting NullReferenceException: Object reference not set to an instance of an object WorldInteraction.GetInteraction () Error?

Questions & Answers
1

Error seems to be at Ray object declaration or upon calling GetInteraction() method. Well I think so.

// Use this for initialization
void Start()
{
    playerAgent = GetComponent<NavMeshAgent>();

}

// Update is called once per frame
void Update()
{
    if (Input.GetMouseButtonDown(0) && !UnityEngine.EventSystems.EventSystem.current.IsPointerOverGameObject())
        GetInteraction();
}

void GetInteraction()
{
    Ray interactionRay = Camera.main.ScreenPointToRay(Input.mousePosition);
    RaycastHit interactionInfo;
    if (Physics.Raycast(interactionRay, out interactionInfo, 100))
    {
        GameObject interactionObject = interactionInfo.collider.gameObject;
        if (interactionObject.tag == "Interactable Object")
        {
            Debug.Log(interactionInfo.collider.gameObject.name);
        }
        else
        {
            playerAgent.destination = interactionInfo.point;
        }
    }
}

91274-capture.png

I’ve set the canvas as an UI and EventSystem was created

I am following this guy: Level Design and Click to Move | Making a Simple RPG - Unity 5 Tutorial (Part 1) - YouTube

2

Instead, you can acess the transform of the object you hit. Maybe the object you hit doesn’t even have a collider, get the transform(wich is sure to have), and if works, do GetComponent; at least that code work for me…

RaycastHit hit;
Ray ray = mainCamera.ScreenPointToRay(new Vector3(Screen.width / 2, Screen.height / 2, 0)); // Also that part changes a bit.
if (Physics.Raycast(ray, out hit, 100)) {
	Transform tr = hit.transform; //Game object transform.
	Destroy(tr.gameObject); // Destroy the gameobject that was hit.
}

Hope that time works.