Unity Tank turret rotation with mouse-CodePudding

I'm making a tank game in unity and I want to rotate tank's turret with mouse. The main Camera is a child of the turret.

I've tried this:

Ray dir = MainCamera.ScreenPointToRay(Input.mousePosition);
RaycastHit hit;
if (Physics.Raycast(dir, out hit)){}
Turret.transform.LookAt(hit.point);

But the turret starts to rotate infinitely. I think it's because of MainCamera is a child of Turret. So I don't know how to do this.

Can you help me?

CodePudding user response：

Calculate the angle between mouse and turret and rotate it with quaternion.lookat

CodePudding user response：

You can try something like this.

using UnityEngine;

public class Rotator : MonoBehaviour
{

    [SerializeField]
    private Camera _camera;

    [SerializeField] private float _rotationFactor = 0.01f;

    private Transform _cameraTransform;
    
    void Start()
    {
        _cameraTransform = _camera.transform;
    }

    void Update()
    {
        var screenCenter = new Vector3(Screen.width / 2.0f, Screen.height / 2.0f);
        // This prevents camera rotation when mouse is in 100 pixels circle in screen center.
        if (!(Input.mousePosition - screenCenter).magnitude < 100f) 
            return;
        
        var mouseWorldPos = _camera.ScreenToWorldPoint(Input.mousePosition   Vector3.forward);
        Debug.Log(mouseWorldPos);
        _camera.transform.rotation = Quaternion.Slerp(
            _camera.transform.rotation,
            Quaternion.LookRotation(mouseWorldPos - _cameraTransform.position),
            _rotationFactor);
    }
}