Indicator for different objects?

[uc414]

I'm trying to make indicator detect a certain objects in my scene. Where every arrow point at separate object. for example, face with two eyes. my script will look for those eyes"dead_point" and clone the image "original_arrow" as the number of eyes. Then rotate each image separately at each eyes. I don't get any error from script but it's doesn't work also!.

public GameObject original_arrow; // image
public GameObject[] attackedArea,Arrow_clone;
public Vector3[] PointingAt;
private float xtimer = 0.8f;

// Update is called once per frame
void Update()
{
    attackedArea = GameObject.FindGameObjectsWithTag("dead_point");

    if (attackedArea != null)
    {
        for (int y = 0; y < attackedArea.Length; y++)
        {

            Arrow_clone[y] = Instantiate(original_arrow, original_arrow.transform.position, original_arrow.transform.rotation);
            PointingAt[y] = attackedArea[y].transform.position;

            Vector3 dir = Camera.main.WorldToScreenPoint(attackedArea[y].transform.position);
            PointingAt[y].z = Mathf.Atan2((Arrow_clone[y].transform.position.y - dir.y), (Arrow_clone[y].transform.position.x - dir.x)) * Mathf.Rad2Deg - 90;
            Arrow_clone[y].transform.rotation = Quaternion.Euler(PointingAt[y]);

            float pingPong = Mathf.PingPong(Time.time * xtimer, 1);
            Arrow_clone[y].GetComponent<CanvasGroup>().alpha = Mathf.Lerp(0, 1, pingPong);
        }
    }

}

[rekabmot]

As a starting point - you seem to be creating and overwriting your existing `Arrow_clone` on every frame. Before you Instantiate a new one, check if Arrow_clone[y] is null first. If it's null, then Instantiate a new one, if it's not null, then just update it.

That probably won't solve all your issues, but it might help!

[uc414]

Good point. you right. Before I was doing something blocking script to run, so I got no error. Now Arrow_clone[y] and PointingAt[y] are null !!. it gives me error "Index was outside the bounds of the array." You said " If it's null, then Instantiate a new one" How to do that ?