Unity - problem with arms rotation and flip, body flip and shotting - 2d shooter - unity3d

Question

I'm starting out with a small shooting game but I have a problem with my character. The arms have to rotate 360º but the body only right or left (depending on where the rotation of the arms by the mouse).
What I got so far is what you see in the video below but I have two big problems and with the help of tutorials.
I was able to rotate and flip my arms but not the body.
Also, when it fires to the right the bullets exit correctly from the firepoint that I created but after the arms flip to the left the bullets (and the weapon fire) are no longer aligned.
Is this approach that I have tried is not the best for this problem?
I appreciate your help.
Game link: https://vimeo.com/310853740
Here my arm rotation script:
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class ArmRotation : MonoBehaviour
{
SpriteRenderer spriteRend;
void Awake()
{
spriteRend = GetComponent<SpriteRenderer>();
}
void Update()
{
AimArmAtMouse();
}
void AimArmAtMouse()
{
Vector2 mousePosition = (Vector2)Camera.main.ScreenToWorldPoint(Input.mousePosition);
Vector2 armToMouse = mousePosition - (Vector2)transform.position;
float rotationZ = Vector2.SignedAngle(transform.right, armToMouse);
transform.Rotate(0f, 0f, rotationZ);
FlipArm(Vector2.SignedAngle(transform.right, Vector2.right));
}
void FlipArm(float rotation)
{
if (rotation < -90f || rotation > 90f)
{
spriteRend.flipY = true;
}
else
{
spriteRend.flipY = false;
}
}
}

Answer 1

It's because you don't flip the firepoint when you flip the sprite. I re-wrote you script to include a reference to the firepoint. I also added a 'FlipFirePoint' function which gets called by your 'FlipArm' function. It should fix your alignment issue.
using UnityEngine;
public class ArmRotation : MonoBehaviour
{
SpriteRenderer spriteRend;
public Transform firePoint;
void Awake()
{
spriteRend = GetComponent<SpriteRenderer>();
}
void Update()
{
AimArmAtMouse();
}
void AimArmAtMouse()
{
Vector2 mousePosition = (Vector2)Camera.main.ScreenToWorldPoint(Input.mousePosition);
Vector2 armToMouse = mousePosition - (Vector2)transform.position;
float rotationZ = Vector2.SignedAngle(transform.right, armToMouse);
transform.Rotate(0f, 0f, rotationZ);
FlipArm(Vector2.SignedAngle(transform.right, Vector2.right));
}
void FlipArm(float rotation)
{
if (rotation < -90f || rotation > 90f)
{
spriteRend.flipY = true;
FlipFirePoint(true);
}
else
{
spriteRend.flipY = false;
FlipFirePoint(false);
}
}
void FlipFirePoint(bool flip)
{
var pos = firePoint.localPosition;
pos.x = Mathf.Abs(pos.x) * (flip ? -1 : 1);
firePoint.localPosition = pos;
}
}

Answer 2

#Sean, I separated the main_body from the arms and made a new script just for body rotation but now it happens to me this:
My test char
The code:
void Update()
{
Flip();
}
void Flip()
{
Vector3 theScale = transform.localScale;
Vector3 pos = new Vector3(Input.mousePosition.x, Input.mousePosition.y, 0);
float WorldXPos = Camera.main.ScreenToWorldPoint(pos).x;
if (WorldXPos > gameObject.transform.position.x)
{
theScale.x = 1;
transform.localScale = theScale;
}
else
{
theScale.x = -1;
transform.localScale = theScale;
}
}}
Almost there but not yet i need😁