public override void OnInspectorGUI()
    {
        DrawDefaultInspector();

        if (GUILayout.Button("generateMap"))
        {
            voxelBuilder.SyncPos();
            voxelBuilder.GenerateMap();
            SceneView.RepaintAll();
        }

        if (GUILayout.Button("Up"))
        {
            voxelBuilder.SetNowFloorIndex(1);
            SceneView.RepaintAll();
        }

        if (GUILayout.Button("Down"))
        {
            voxelBuilder.SetNowFloorIndex(-1);
            SceneView.RepaintAll();
        }
    }