Unity converts world coordinates to UI coordinates

Unity objects are in world coordinates, and a series of transformations are required to align objects in the UI with objects in the world.

private void ShowTowerUpgrade(TowerCtrl ctrl)
{
    towerCtrl = ctrl;//3D世界里的物体        
    transform.localPosition = WorldPointToUILocalPoint(ctrl.transform.position);
}    

private Vector3 WorldPointToUILocalPoint(Vector3 point)
{
    //将世界坐标转为屏幕坐标
    Vector3 screenPoint = Camera.main.WorldToScreenPoint(point);

    //将屏幕坐标转换到RectTransform的局部坐标中
    Vector2 uiPosition;
    RectTransformUtility.ScreenPointToLocalPointInRectangle(transform.parent.GetComponent<RectTransform>(), screenPoint, UIManager.Instance.UICamera, out uiPosition);
    return uiPosition;
}

This code is hung on m_Upgrade in the UI, so the transform in the code refers to the transform of m_Upgrade