Unity中x>4的瓦片点击不显示子物体渲染器问题求助

我是Unity新手，正在学习开发技巧，以下代码肯定有更优实现方式。我通过x、y变量构建嵌套循环，实例化一批瓦片，每个瓦片内包含一个仅在点击时才显示的子物体（带渲染器）。

目前遇到异常：x>4的瓦片点击后，子物体虽存在但无法显示渲染器；奇怪的是，当将boardSizeY设置为6或更小时，所有x值对应的瓦片点击逻辑都能正常工作。

我已排查x、y的使用场景，也通过删减代码尝试定位问题，但仍毫无头绪，希望能有人指明排查方向。

相关脚本 #

CaselleTerreno.cs（挂载在游戏对象上的组件） #

using UnityEngine;
using TMPro;

public class CaselleTerreno : MonoBehaviour
{
    public GameObject tilePrefab;
    private int boardSizeX = 10;
    private int boardSizeY = 8;
    public float tileSize = 1f;
    public Sprite[] spriteSheet;
    public SpriteRenderer spriteRenderer;
    public int sliceIndex;
    public GameObject activeChild;
    public GameObject RightPane;
    public TextMeshProUGUI rightText;

    public GameObject overTileObject;
    private SpriteRenderer overTileObjectSpriteRenderer;
    private float randRange;
    private int OnTileObject;
    public static class MyConstants
    {
        public static readonly string[,] DATA = {
        {"31", " spreaded remains",         "0", "0", "0", "0"},
        {"32", "  inhanimate creature",     "10", "20", "30", "40"},
        {"33", "n empty space",             "0", "0", "0", "0"},
        {"34", " dead creature",             "10", "20", "30", "40"},
        {"35", " metallic container",       "11", "21", "31", "41"},
        {"36", " dead bush",                "12", "22", "32", "42"},
        {"37", " abandoned metal object",   "13", "23", "33", "43"},
        {"38", "n half open trapdoor",      "14", "24", "34", "44"},
        {"39", " cocoon of a giant insect", "15", "25", "35", "45"},
        {"40", " strange hard box",         "16", "26", "36", "46"},
        {"41", " strange vial",             "17", "27", "37", "47"},
        {"42", " giant boulder",            "18", "28", "38", "48"},
        {"43", " tuft of grass",            "19", "29", "39", "49"},
        {"44", " bizzarre succulent",       "10", "20", "30", "40"},
        {"45", " skeletal remain",          "11", "21", "31", "41"},
        {"46", " colony of arthropods",     "12", "22", "32", "42"},
        {"47", " packet",                   "13", "23", "33", "43"},
        {"48", " plant",                    "14", "24", "34", "44"},
        {"49", " bush with colorful berries", "15", "25", "35", "45"},
        {"50", " fruit tree",               "16", "26", "36", "46"},
        {"51", " lively tree",              "17", "27", "37", "47"},
        {"52", " dry tree",                 "18", "28", "38", "48"}
    };
    }

    void Start()
    {
        spriteSheet = Resources.LoadAll<Sprite>("TilesAtlasTerrain3");
        RightPane = GameObject.Find("RightPane");
        rightText = RightPane.transform.Find("Canvas/RightText").GetComponent<TextMeshProUGUI>();

        for (int x = 0; x < boardSizeX; x++)
        {
            for (int y = 0; y < boardSizeY; y++)
            {
                randRange = Random.Range(0, 4) * 90f;
                GameObject tile = Instantiate(tilePrefab, new Vector3(x * tileSize, y * tileSize, 0), Quaternion.identity);
                tile.name = "Tile " + x + "_" + y;
                tile.transform.parent = transform;
                tile.GetComponent<TerrainTileScript>().rightText = rightText;
                activeChild = tile.transform.Find("SelectedRenderLayer").gameObject;
                activeChild.SetActive(false);
                spriteRenderer = tile.GetComponent<SpriteRenderer>();
                if (Random.Range(0, 100) < 85){   
                    sliceIndex = 0;               }
                else {
                    sliceIndex = Random.Range(0, 30);
                }
                spriteRenderer.sprite = spriteSheet[sliceIndex];
                spriteRenderer.transform.Rotate(Vector3.forward, randRange, Space.Self);

                if (Random.Range(0f, 1f) < 0.725f)
                {
                    OnTileObject = Random.Range(34, 53);
                } 
                else
                {
                    OnTileObject = 33;
                }
                overTileObject = tile.transform.Find("OverTileObject").gameObject;
                overTileObjectSpriteRenderer = overTileObject.GetComponent<SpriteRenderer>();
                overTileObjectSpriteRenderer.sprite = spriteSheet[OnTileObject];
                overTileObject.transform.Rotate(Vector3.forward, 360f - randRange, Space.Self);

                tile.GetComponent<TerrainTileScript>().descOnTileObj = MyConstants.DATA[OnTileObject -31, 1];
            }
        }
    }
}

TerrainTileScript.cs（TerrainTile资源的脚本） #

using UnityEngine;
using TMPro;

public class TerrainTileScript : MonoBehaviour
{
    public TextMeshProUGUI rightText;
    public string descOnTileObj;

    private void OnMouseDown()
    {
        rightText.text = "Clicked tile: " + name+ "\n";
        
        CaselleTerreno caselleTerreno = GetComponentInParent<CaselleTerreno>();
        GameObject activeChild = caselleTerreno.activeChild;
        if (activeChild != null)
        {
            activeChild.SetActive(false);
        }
        activeChild = transform.Find("SelectedRenderLayer").gameObject;
        activeChild.SetActive(true);
        caselleTerreno.activeChild = activeChild;

        GameObject OverActiveChild = transform.Find("OverTileObject").gameObject;
        SpriteRenderer spriteRenderer = OverActiveChild.GetComponent<SpriteRenderer>();
        if (spriteRenderer != null)
        {
            string spriteName = spriteRenderer.sprite.name;
            string indexString = spriteName.Substring(spriteName.Length - 2, 2);
            rightText.text += "(contiene " + indexString + ")\n";
            rightText.text += "There is a" + descOnTileObj + " here.\n";
        }
    }
}

排查方向 #

• 检查CaselleTerreno中全局变量activeChild的覆盖问题：实例化所有瓦片时该变量会被逐个覆盖，点击瓦片时依赖它关闭上一个激活的子物体，可能出现逻辑错误。建议改为让每个瓦片自行管理激活状态，或用集合保存所有激活的子物体。
• 验证transform.Find("SelectedRenderLayer")的有效性：在OnMouseDown中添加Debug.Log(activeChild)，确认x>4的瓦片是否真的找到了子物体，排查命名或层级错误。
• 检查渲染遮挡与相机视口：确认x>4的瓦片及其子物体是否在相机视野内，子物体的Z轴位置是否被父瓦片遮挡，可尝试调整子物体Z值测试。
• 确认OnMouseDown触发：在OnMouseDown开头添加Debug.Log("点击瓦片：" + name)，检查x>4的瓦片是否能正常触发点击事件，排查碰撞体是否缺失或范围异常。
• 检查数组索引越界：OnTileObject = Random.Range(34,53)，确认spriteSheet长度是否≥53，数组越界会导致内存异常，引发不可预测行为。
• 检查父物体变换：瓦片父物体的缩放、旋转等变换是否导致x>4的瓦片位置偏移，子物体超出相机范围。

内容的提问来源于stack exchange，提问作者Muni Dr. Fractal