Unity のカメラとオブジェクト間の距離制御ラベルの表示と非表示を切り替える

public class DeviceNameItem : MonoBehaviour
{
    
    
    public Text Devicenametext;
    public RectTransform rect;
    private Camera mainCam;
    private TipItemModel ItemDate;
    private Vector3 mWorldTarget;
    private Canvas mCanvas;
    private string modelType = "";
    private float distance = 0f;
    private float currentAngle = 0;
    private bool isHover = false;
    private bool isShowLine = false;
    private float MaxSizeDistance = 9;
    public CanvasGroup mCanvasGroup;
    private void Start()
    {
    
    
        mainCam = Camera.main;
        rect = transform as RectTransform;
    }

    private void Update()
    {
    
    
        //transform.forward = mainCam.transform.forward;
        if (mWorldTarget==null||mCanvas==null)
        {
    
    
            return;
        }
        transform.localPosition = UnityTool.WorldToUGUILocalPosition(Camera.main, mWorldTarget, mCanvas);
        distance = Vector3.Distance(mWorldTarget, mainCam.transform.position);
        currentAngle = Vector3.Angle(mWorldTarget - mainCam.transform.position, mainCam.transform.forward);
      
            currentAngle = Vector3.Angle(mWorldTarget - mainCam.transform.position, mainCam.transform.forward);

        }
      
    }
    public void SetShowState(bool isShow)
    {
    
    
        //Debug.Log(isShow);
        mCanvasGroup.alpha = isShow ? 1 : 0;
        mCanvasGroup.blocksRaycasts = isShow;
    }
    public void SetDeviceName(TipItemModel item, string modelType)
    {
    
    
        ItemDate = item;
        this.modelType = modelType;
        Devicenametext.text = item.DeviceName;
        //Debug.Log(modelType);
      
    }
    public void SetTarget(Vector3 worldPos, Canvas canvas)
    {
    
    
        mWorldTarget = worldPos;
        mCanvas = canvas;
        transform.localPosition = UnityTool.WorldToUGUILocalPosition(Camera.main, worldPos, canvas);
        //  TipRect.sizeDelta = new Vector2(0,50);
        // SetShowState(true);
    }
}```