试图在两点之间进行 lerp 但得到 NullReferenceException [unity]

Question

I'm trying to lerp between two points in my script but i get NullReferenceException
here is the code:

    Transform  endPos;
    float speed;
 void Start()
    {
       endPos.position = new Vector3(0, -1, 1);

    }
 void  Update()
    {
    transform.position = Vector3.Lerp(transform.position, endPos.position, speed * Time.deltaTime);
    }     

Interesting thing is that when i set the transform to public and set it in editor it works.
I even tried to use it through creating a gameObject and set the postion through there but no luck.
so how can i do it through script and not editor?
Thanks.

Answer 1

It is happening because your endPos transform is null when you try to set its position. Use Vector3 instead of transform. Edit your code like this

    Vector3 endPos;
    float speed;

    void Start()
    {
       endPos = new Vector3(0, -1, 1);    
    }

    void Update()
    {
       transform.position = Vector3.Lerp(transform.position, endPos, speed * Time.deltaTime);
    }