Camera Rotation Controller

gistfile1.cs

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

public class CameraRotationController : MonoBehaviour
{
    public Transform cameraRigTransform;
    public float rotateSpeed = 10.0f; //rotation speed
    public float rotateDegrees = 90.0f; // degrees to rotate per hit

    private Quaternion _targetRot;
    private float targetAngle = 0.0f;

    void Start()
    {
        cameraRigTransform = GetComponent<Transform>();
    }

    void Update()
    {
        if (Input.GetKeyDown(KeyCode.E))
        {
            targetAngle = checkBounds(targetAngle + rotateDegrees);
            _targetRot = Quaternion.AngleAxis(targetAngle, cameraRigTransform.up);
        }
        if (Input.GetKeyDown(KeyCode.Q))
        {
            targetAngle = checkBounds(targetAngle - rotateDegrees);
            _targetRot = Quaternion.AngleAxis(targetAngle, cameraRigTransform.up);
        }
    }

    float checkBounds(float _angle)
    {
        if (_angle > 180.0f)
        {
            return -1f * rotateDegrees; // Example: -90.0f
        }
        else if (_angle < -180.0f)
        {
            return rotateDegrees; // Example: 90.0f
        }
        else
        {
            return _angle;
        }
    }

    void LateUpdate()
    {
        cameraRigTransform.rotation = Quaternion.Slerp(cameraRigTransform.rotation, _targetRot, Time.deltaTime * rotateSpeed);
    }
}