Unity Editor Rotation Script

using UnityEditor;
using UnityEngine;

[ExecuteInEditMode]
public class EditorRotationScript : MonoBehaviour
{
    [SerializeField]
    private float m_rotationRadius = 1f;

    [SerializeField]
    [Range(-300.0f, 300.0f)]
    private float m_rotationSpeed = 1f;

    private double m_lastTime = 0f;
    private Vector3 m_oP;
    private Quaternion m_oR;
    private float m_currentRotation = 0f;

    private void OnEnable()
    {
        EditorApplication.update += Update;
        m_lastTime = EditorApplication.timeSinceStartup;
        m_oP = transform.position;
        m_oR = transform.rotation;
        m_currentRotation = 0f;
    }

    private void OnDisable()
    {
        EditorApplication.update -= Update;
        transform.position = m_oP;
        transform.rotation = m_oR;
    }

    private void Update()
    {
        double delta = EditorApplication.timeSinceStartup - m_lastTime;
        m_lastTime = EditorApplication.timeSinceStartup;
        m_currentRotation += (float)(m_rotationSpeed * delta);

        transform.position = new Vector3(m_oP.x + m_rotationRadius * Mathf.Cos(m_currentRotation), m_oP.y, m_oP.z + m_rotationRadius * Mathf.Sin(m_currentRotation));
    }
}