ass="paramtype">float&#160;</td>
          <td class="paramname"><em>a</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
</div>
<div class="memdoc">
<p>Clears the rendering surface to the specified color.</p>
<dl><dt><b>Parameters:</b></dt><dd>
  <table class="params">
    <tr><td class="paramname">r</td><td></td></tr>
    <tr><td class="paramname">g</td><td></td></tr>
    <tr><td class="paramname">b</td><td></td></t