Camera on circle editor

//Editor code
using UnityEngine;
using UnityEditor;

[CustomEditor(typeof(CameraOnRails))]
public class CurveForCamera : Editor {
    void OnSceneGUI() {
        CameraOnRails cameraOnRails = target as CameraOnRails;

        Vector3 v = new Vector3(cameraOnRails.radius*Mathf.Cos(2f*Mathf.PI*cameraOnRails.posInCurve),
                                0f,
                                cameraOnRails.radius*Mathf.Sin(2f*Mathf.PI*cameraOnRails.posInCurve));
        v+= cameraOnRails.transform.position;

        if(cameraOnRails.cameraTransform!=null){
            cameraOnRails.cameraTransform.position = v;
            v = cameraOnRails.transform.position+new Vector3(0f,cameraOnRails.cameraSlope,0f);
            cameraOnRails.cameraTransform.LookAt(v);
        }


        int n = cameraOnRails.numberSegments;



        for(int i=0;i<(n-1);i++){

            Vector3 v1 = new Vector3(cameraOnRails.radius*Mathf.Cos(2f*Mathf.PI*i/(n-1)),
                                     0f,
                                     cameraOnRails.radius*Mathf.Sin(2f*Mathf.PI*i/(n-1)));

            Vector3 v2 = new Vector3(cameraOnRails.radius*Mathf.Cos(2f*Mathf.PI*(i+1)/(n-1)),
                                     0f,
                                     cameraOnRails.radius*Mathf.Sin(2f*Mathf.PI*(i+1)/(n-1)));

            Handles.color = Color.green;
            Handles.DrawLine(v1+cameraOnRails.transform.position,v2+cameraOnRails.transform.position);
        }

    }
}


//Scene code
using UnityEngine;
using System.Collections;

[ExecuteInEditMode]
public class CameraOnRails : MonoBehaviour {

    [RangeAttribute(10,50)]
    public int numberSegments;
    public float radius;
    public Transform cameraTransform;
    [RangeAttribute(0.0f, 2.0f)]
    public float posInCurve;

    [RangeAttribute(-20f,20f)]
    public float cameraSlope;
}