コーネルボックスを作るUnityEditor拡張

using UnityEngine;
using UnityEditor;

public class ConelBoxGenerator
{
    [MenuItem ("Tools/Else/ConelboxGenerate")]
    static void Ceate ()
    {
        var conelbox = new GameObject ().transform;
        conelbox.name = "conelbox";
        SetPosition (conelbox, 0, 0, 0);
        //Left
        var plane0 = GameObject.CreatePrimitive (PrimitiveType.Plane).transform;
        SetPosition (plane0, -5, 0, 0);
        SetRotation (plane0, 0, 0, -90);
        //right
        var plane1 = GameObject.CreatePrimitive (PrimitiveType.Plane).transform;
        SetPosition (plane1, 5, 0, 0);
        SetRotation (plane1, 0, 0, 90);
        //up
        var plane2 = GameObject.CreatePrimitive (PrimitiveType.Plane).transform;
        SetPosition (plane2, 0, 5, 0);
        SetRotation (plane2, 0, 0, 180);
        //down
        var plane3 = GameObject.CreatePrimitive (PrimitiveType.Plane).transform;
        SetPosition (plane3, 0, -5, 0);
        SetRotation (plane3, 0, 0, 0);
        //back
        var plane4 = GameObject.CreatePrimitive (PrimitiveType.Plane).transform;
        SetPosition (plane4, 0, 0, -5);
        SetRotation (plane4, 90, 0, 0);
        //front
        var plane5 = GameObject.CreatePrimitive (PrimitiveType.Plane).transform;
        SetPosition (plane5, 0, 0, 5);
        SetRotation (plane5, -90, 0, 0);

        plane0.SetParent (conelbox, false);
        plane1.SetParent (conelbox, false);
        plane2.SetParent (conelbox, false);
        plane3.SetParent (conelbox, false);
        plane4.SetParent (conelbox, false);
        plane5.SetParent (conelbox, false);
        plane0.gameObject.isStatic = true;
        plane1.gameObject.isStatic = true;
        plane2.gameObject.isStatic = true;
        plane3.gameObject.isStatic = true;
        plane4.gameObject.isStatic = true;
        plane5.gameObject.isStatic = true;
        conelbox.gameObject.isStatic = true;

    }

    static void SetRotation (Transform transform, int x, int y, int z)
    {
        transform.rotation = Quaternion.Euler (x, y, z);
    }

    static void SetPosition (Transform transform, int x, int y, int z)
    {
        transform.position = new Vector3 (x, y, z);
    }
}