rotate 2d circle on z axis ?

Questions & Answers
1

i wrote a code that rotates circle on z axis with mouse touch , but the result is like the circle looks at mouse cursor which is not what im looking for , so im going to show you the code samples , code 1 and code 2 :
code1 : which what is the one i use for 2D circle or wheel , and its the one that has result of which the wheel rotates by looking at mouse

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class pss_wheel : MonoBehaviour
{
    [Header("Degree of rotation offset. *360")]
    public float offset = 180.0f;
    Vector3 mPrevPos = Vector3.zero;
    Vector3 mPosDelta = Vector3.zero;
    bool mIsTouching = false;
    void Update()
    {
        if (Input.GetMouseButton(0))
        {
            if (!mIsTouching)
            {
                mPrevPos = Input.mousePosition;
            }
            mIsTouching = true;    
            mPosDelta = Input.mousePosition - mPrevPos;
            transform.Rotate(transform.up, -Vector3.Dot(mPosDelta, Camera.main.transform.right), Space.Self);   
            Vector3 difference = Camera.main.ScreenToWorldPoint(Input.mousePosition) - transform.position;
            difference.Normalize(); 
            float rotationZ = Mathf.Atan2(difference.y, difference.x) * Mathf.Rad2Deg;   
            transform.rotation = Quaternion.Euler(0f, 0f, rotationZ - (90 + offset));
        }
        else
        {
            mIsTouching = false;
        }
        mPrevPos = Input.mousePosition;
    }
}

Code 2 : this one works perfectly fine but for a 3d wheel on a 2d view

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Wheel_physics : MonoBehaviour
{
    Vector3 mPrevPos = Vector3.zero;
    Vector3 mPosDelta = Vector3.zero;
    bool mIsTouching = false; 
    void Update()
    {
        if (Input.GetMouseButton(0))
        {
            if (!mIsTouching)
            {
                mPrevPos = Input.mousePosition;
            }
            mIsTouching = true;    
            mPosDelta = Input.mousePosition - mPrevPos;
            transform.Rotate(transform.up, -Vector3.Dot(mPosDelta, Camera.main.transform.right), Space.World);
        }
        else
        {
            mIsTouching = false;
        }

        mPrevPos = Input.mousePosition;
    }      
    void OnCollisionEnter(Collision collision)
    {
        if (collision.gameObject.name == "yellow_s")
        {              
            Destroy(collision.gameObject);
        }
    }
};

what im looking for is i want to achieve the results of code 2 but using the 2D wheel , or a way to improve code to give me the same results as code 2 , sorry for the long request , but i’ll be appreciated !

2

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class final_wheel : MonoBehaviour
{
Vector3 mPrevPos = Vector3.zero;
Vector3 mPosDelta = Vector3.zero;
bool mIsTouching = false;

// Update is called once per frame
void Update()
{

    if (Input.GetMouseButtonDown(0))
    {
        mPrevPos = Input.mousePosition;
    }
    else if (Input.GetMouseButton(0))
    {
        mPosDelta = Input.mousePosition - mPrevPos;

        Vector3 proj = Camera.main.WorldToScreenPoint(transform.position);

        if (proj.y > Input.mousePosition.y)
        {
            transform.Rotate(transform.forward, Vector3.Dot(mPosDelta, Camera.main.transform.right), Space.World);
        }
        else
        {
            transform.Rotate(transform.forward, -Vector3.Dot(mPosDelta, Camera.main.transform.right), Space.World);
        }

        if (proj.x > Input.mousePosition.x)
        {
            transform.Rotate(Camera.main.transform.forward, -Vector3.Dot(mPosDelta, Camera.main.transform.up), Space.World);
        }
        else
        {
            transform.Rotate(Camera.main.transform.forward, Vector3.Dot(mPosDelta, Camera.main.transform.up), Space.World);
        }

        mPrevPos = Input.mousePosition;
    }

}

}