public override void OnInspectorGUI()
    {
        MeshCreator meshCreator = target as MeshCreator;

        meshCreator.width  = EditorGUILayout.FloatField("Width", meshCreator.width);
        meshCreator.height = EditorGUILayout.FloatField("Height", meshCreator.height);
        meshCreator.length = EditorGUILayout.FloatField("Length", meshCreator.length);

        if (GUILayout.Button("Generate Quad"))
        {
            meshCreator.CreateQuadMesh();
        }

        if (GUILayout.Button("Generate Cube"))
        {
            meshCreator.CreateCubeMesh();
        }
    }