"UnityException: Transform child out of bounds" - I am getting this error always whenever I am trying to run the code. Please help !!!

Questions & Answers
1

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.XR.ARFoundation;
using UnityEngine.XR.ARSubsystems;

public class Placer : MonoBehaviour
{
[Header(“AR”)]
[SerializeField] ARRaycastManager raycastManager;
[SerializeField] GameObject blindsPrefab;
[SerializeField] Camera raycastCamera;
private GameObject visual;

private List<ARRaycastHit> hits = new List<ARRaycastHit>();

// Start is called before the first frame update
void Start()
{
	raycastManager = FindObjectOfType<ARRaycastManager>();
	visual = transform.GetChild(0).gameObject;
	visual.SetActive(false);
}

// Update is called once per frame
void Update()
{
	if (Input.GetMouseButton(0) && !IsClickOverUI())
	{
		Ray ray = raycastCamera.ScreenPointToRay(Input.mousePosition);
		if (raycastManager.Raycast(ray, hits, TrackableType.Planes))
		{
			Pose pose = hits[0].pose;
			foreach (GameObject gameObject in blindsPrefab)
			{
				if (FindObjectOfType<ToggleAR>().isOn)
				{
					gameObject.transform.SetPositionAndRotation(pose.position, pose.rotation);
					if (!visual.activeInHierarchy)
						visual.SetActive(true);
				}
			}
		}
	}
}

bool IsClickOverUI()
{
	PointerEventData pointerEventData = new PointerEventData(EventSystem.current);
	pointerEventData.position = Input.mousePosition;

	List<RaycastResult> raycastResults = new List<RaycastResult>();
	EventSystem.current.RaycastAll(pointerEventData, raycastResults);
	for (int i = 0; i < raycastResults.Count; i++)
	{
		if (raycastResults*.gameObject.GetComponent<MouseOverClickThrough>() != null)*

  •   	{*

  •   		raycastResults.RemoveAt(i);*

  •   		i--;*

  •   	}*

  •   }*

  •   return raycastResults.Count > 0;*
  • }*
    }
2

I like to iterate backwards through lists if I am removing elements.

for(int i = raycastResult.Count; i >= 0; i--) {
    //stuff
}