在 Unity 中使用脚本重置相机的问题

Question

I want to centre the camera on the object and then, if player clicks on button (which will be added later) or outside of the pop-up which will be triggered by clicking on object (camera movement is just a first step).

My idea was to store the very first position of the camera and transform it back again if mouse is clicking outside of any clickable objects, but looks like it's not working.

void Update()
{
    Vector3 camoriginposition;
    if (Input.GetMouseButtonDown(0))
    {
        Camera cam = Camera.main;
        camoriginposition = Camera.main.transform.position;
        RaycastHit hit;
        Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
        if (Physics.Raycast(ray, out hit))
        {
            Rigidbody rb;
            if (rb = hit.transform.GetComponent<Rigidbody>())
            {
                Vector3 obj = rb.transform.position - new Vector3(0, -3, 2);
                cam.transform.position = obj;
                Debug.Log("curr cam pos" + cam.transform.position);
            }
            else
            {
                cam.transform.position = camoriginposition;
                Debug.Log("It triggers!");
            }
        }
    }
}

I receive the Debug.Log output, but looks like transform.position cannot be processed.

Do you have any ideas how to fix it?

Answer 1

I'm not sure what behaviour you are meaning by "not working", but maybe It's because you are declaring camoriginposition on every Update() , which would be definitely not the desired behaviour. Whenever you tries to store your cam's origin position to local variable, it will be gone when the Update() scope ends, and will be initialized again with new Update() call.

You have to seperate camoriginposition from Update() , like:

private Vector3 camoriginposition;

void Update()
{
    if (Input.GetMouseButtonDown(0))
    {
         ...
}

And, it seems like there are another problem. You are storing camoriginposition on every mouse click, but with your description, It seems like it should be stored when the ray actually hits the gameobject.

You should move camoriginposition = Camera.main.transform.position;

into

if (rb = hit.transform.GetComponent<Rigidbody>()) block.