    set line width.


    <h3>Parameters:</h3>
    <ul>
        <li><span class="parameter">w</span>
            <span class="types"><span class="type">number</span></span>
         line width (in pixels, floats permitted)
        </li>
    </ul>





</dd>
    <dt>
    <a name = "line_cap"></a>
    <strong>line_cap (style)</strong>
    </dt>
    <dd>
    set line cap style.


    <h3>Parameters:</h3>
    <ul>
        <li><span class="parameter">style</span>
         line cap style string ("butt", "round" o