  </ol>
    </p>

    <h3 align = "center">
      Source Code:
    </h3>

    <p>
      <ul>
        <li>
          <a href = "polygonal_surface_display.m">polygonal_surface_display.m</a>
          the source code.
        </li>
      </ul>
    </p>

    <h3 align = "center">
      Examples and Tests:
    </h3>

    <p>
      <b>SPHERE_Q4</b> is a sphere, tiled with an 8 by 8 array of
      logically rectangular patches.
      <ul>
        <li>
          <a href = "../../data/polygonal_surface/sphere_q4_nod