Assets/Scripts/ArmRotation.cs


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

public class ArmRotation : MonoBehaviour
{
    [SerializeField]
    private float angle;
    private Vector2 slope;

    // Start is called before the first frame update
    void Start()
    {
    }

    // Update is called once per frame
    void Update()
    {
        if(Input.GetMouseButtonDown(0))
        {
            RotateToFacePoint(Camera.main.ScreenToWorldPoint(Input.mousePosition));
        }
    }

    void RotateToFacePoint(Vector3 point)
    {
        slope = point - transform.position;
        slope.Normalize();
        angle = Mathf.Atan2(slope.y, slope.x) * Mathf.Rad2Deg;
        transform.rotation = Quaternion.AngleAxis(angle, Vector3.forward);
    }
}