Free-look Camera Controller

freelook.cs

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

public class FreeLook : MonoBehaviour
{
    public float mouseSpeed = 10f;
    public float minYaw = -40;
    public float maxYaw = 40;
    public float minPitch = 0;
    public float maxPitch = 20;

    public float turnSpeed = 10;

    [Header("Toggle")]
    public bool mouseLook;

    float _xAngle = 0F;
    float _yAngle = 0F;

    Quaternion _origRot;
    Quaternion _toRot;

    private void Start()
    {
        _origRot = _toRot = transform.localRotation;
    }

    private void Update()
    {
        if (mouseLook)
        {
            TurnHeadDelta(Input.GetAxis("Mouse X") * mouseSpeed, Input.GetAxis("Mouse Y") * mouseSpeed);
        }
        UpdateLookDir();
    }

    void TurnHeadTo(Vector2 toAngles)
    {
        var deltaX = toAngles.x - _xAngle;
        var deltaY = toAngles.y - _yAngle;
        TurnHeadDelta(deltaX, deltaY);
    }

    void TurnHeadDelta(float deltaHorizontal, float deltaVertical)
    {
        _xAngle += deltaHorizontal;
        _yAngle += deltaVertical;

        _xAngle = ClampAngle(_xAngle, minYaw, maxYaw);
        _yAngle = ClampAngle(_yAngle, minPitch, maxPitch);

        Quaternion xRot = Quaternion.AngleAxis(_xAngle, Vector3.up);
        Quaternion yRot = Quaternion.AngleAxis(_yAngle, -Vector3.right);
        _toRot = xRot * yRot * _origRot;
    }

    void UpdateLookDir()
    {
        if (Quaternion.Angle(transform.localRotation, _toRot) >= .01f)
        {
            transform.localRotation = Quaternion.RotateTowards(
                transform.localRotation,
                _toRot,
                turnSpeed);
        }
        else
        {
            transform.localRotation = _toRot;
        }
    }

    public static float ClampAngle(float angle, float min, float max)
    {
        if (angle < -360F)
            angle += 360F;
        if (angle > 360F)
            angle -= 360F;
        return Mathf.Clamp(angle, min, max);
    }

    public void RestToOriginal()
    {
        TurnHeadTo(Vector2.zero);
    }

    #region Helper
    [Header("Quick Dirs")]
    public Vector2 WestAngles = new Vector2(-40, 15);
    public Vector2 EastAngles = new Vector2(40, 15);
    public Vector2 NorthAngles = new Vector2(0, 20);

    void LookAtWestSeat()
    {
        TurnHeadTo(WestAngles);
    }

    void LookAtEastSeat()
    {
        TurnHeadTo(EastAngles);
    }

    void LookAtNorthSeat()
    {
        TurnHeadTo(NorthAngles);
    }
    #endregion
}