Как сделать что бы родительский обьект оставался статичным?

using UnityEngine;
using UnityEngine.UI;
using UnityEngine.EventSystems;
 
public class MainTankMoving : MonoBehaviour, IDragHandler, IPointerUpHandler, IPointerDownHandler {
    [SerializeField]
    private Image bgjoystick;
    [SerializeField]
    private Image joystick;
    private Vector2 inputVector;
 
    public GameObject BGjoystick;
    public GameObject joystickk;
 
    public GameObject mainTank;
    public float tankSpeed;
    public float rotationSpeed;
    Vector2 tankmove;
 
    Vector2 inputvectorfake;
    
    void Start()
    {
        inputVector = Vector2.zero;
        bgjoystick = GetComponent<Image>();
        joystick = transform.GetChild(0).GetComponent<Image>();
    }
 
    void FixedUpdate()
    {
        BGjoystick.transform.eulerAngles = new Vector3(0f, 0f, mainTank.transform.rotation.eulerAngles.z);
        joystickk.transform.eulerAngles = new Vector3(0f, 0f, mainTank.transform.rotation.eulerAngles.z - mainTank.transform.rotation.eulerAngles.z);
        tankmove = inputVector;
 
        if (inputVector.y > 0.5f & inputVector.y == 0.5f)
            tankmove.y = 1f ;
        if (inputVector.y < -0.5f & inputVector.y == -0.5f)
            tankmove.y = -1f;
        if (inputVector.y > -0.5f & inputVector.y < 0.5f)
        {
            tankmove = new Vector2(inputVector.x * 2, inputVector.y * 2);
        }
 
        mainTank.transform.Rotate(-Vector3.forward * rotationSpeed * tankmove.x * 0.3f * tankmove.y*3);
        mainTank.transform.Translate(Vector2.up * tankSpeed * tankmove * 0.01f);
    }
 
    public virtual void OnPointerUp (PointerEventData ped)
    {
        tankmove = Vector2.zero;
        inputVector = Vector2.zero;
        joystick.rectTransform.anchoredPosition = Vector2.zero;
    }
 
    public virtual void OnPointerDown(PointerEventData ped)
    {
        OnDrag(ped);
    }
 
    public virtual void OnDrag(PointerEventData ped)
    {
        Vector2 pos;
        if (RectTransformUtility.ScreenPointToLocalPointInRectangle(bgjoystick.rectTransform, ped.position, ped.pressEventCamera, out pos))
        {
            pos.x = (pos.x / joystick.rectTransform.sizeDelta.x);
            pos.y = (pos.y / joystick.rectTransform.sizeDelta.y);
 
            inputVector = new Vector2(pos.x*2,pos.y*2);
            inputVector = (inputVector.magnitude > 1.0f) ? inputVector.normalized : inputVector;
 
            joystick.rectTransform.anchoredPosition = new Vector2(inputVector.x * (bgjoystick.rectTransform.sizeDelta.x / 2), inputVector.y * (bgjoystick.rectTransform.sizeDelta.y / 2));
        }
    }
    
}