Rotations

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

public class Rotations : MonoBehaviour {

    public enum RotationMode { Euler, Slerp, LookRotation}
    public RotationMode rotationMode;
    public Quaternion quaternion;
    public float RollZ;
    public float PitchX;
    public float YawY;

    public Transform lookAtSphere;

    void Update()
    {

        RollZ = transform.localRotation.eulerAngles.z;
        YawY = transform.localRotation.eulerAngles.y;
        PitchX = transform.localRotation.eulerAngles.x;

        switch (rotationMode)
        {

            case RotationMode.Euler:
                {
                    transform.rotation *= Quaternion.Euler(0, 0, 0.5f);
                    quaternion = transform.rotation;
                    break;

                }
            case RotationMode.Slerp:
                {
                    transform.rotation = Quaternion.Slerp(transform.rotation,Quaternion.Euler(0.1f,1.0f,1.0f),2f* Time.deltaTime);
                    quaternion = transform.rotation;
                    break;
                }
            case RotationMode.LookRotation:
                {
                    transform.rotation = Quaternion.LookRotation(transform.position - lookAtSphere.position, Vector3.left);
                    quaternion = transform.rotation;
                    break;
                }

            default:
                break;

        }
    }

}