Unity Tank turret rotation with mouse

Ivan K 0
Viewed 38

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?

game-development c# unity3d
2 Answers

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

userQnx310

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);
    }
}
userHlTI0
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