Child object rotation upside down when facing left

I have an empty object called "Player", which has several child objects. When turning left or right I rotate the Player object but when I make the player look towards the mouse, I rotate several child objects (aka TopBody). Problem is, when facing left the rotation is upside down. It works perfectly when facing right tho.

Code (csharp):

1.  
2. foreach(GameObject GO in TopBody)
3. {
4.        Vector3 diff = Camera.main.ScreenToWorldPoint(Input.mousePosition) - transform.position;              
5.        diff.Normalize();
6.  
7.        float rot_z = Mathf.Atan2(diff.y, diff.x) * Mathf.Rad2Deg;
8.  
9.        //rot_z 0 = right, 90 = up, 180  = left
10.        if (rot_z < 180 && rot_z > 90) //left-up //this is the part that doesn't work so well
11.        {
12.              if (!isFacingLeft)
13.              {
14.                     RotateLeft();
15.              }
16.              GO.transform.rotation = Quaternion.Euler(0f, 0f, rot_z);
17.          }
18.  
19.          if(rot_z < 90 && rot_z > 0) //right-up //this part works perfectly
20.          {
21.                 if (isFacingLeft) RotateRight();
22.                 GO.transform.rotation = Quaternion.Euler(0f, 0f, rot_z);
23.           }
24.  }
25.  

I've tried changing rotation values but so far nothing has worked.
I also tried this:

Code (csharp):

1.  
2. /*Vector3 temp = GO.transform.position;
3.              temp.y += 180;
4.              temp.z = rot_z;
5.               GO.transform.eulerAngles = temp;*/
6.  

This part turns the object right way, but the aim is mirrored (when aiming high left, the rotation is low left and aiming low left rotation is high left, if that makes any sense."

Any help is appreciated!

 

You can calculate a quaternion much easier with just Quaternion.LookRotation. In your case you would use something like..

Code (CSharp):

1. Vector3 mousePos = Camera.main.ScreenToWorldPoint(Input.mousePosition);
2. Quaternion targetRot = Quaternion.LookRotation(transform.forward, mousePos - transform.position);
3. foreach (GameObject GO in TopBody)
4. {
5.     GO.transform.rotation = targetRot;
6. }

 

That worked well enough for me, had to do some adjustments but thank you.