td">=</span><span class="hl num">1</span><span class="hl std">)</span>
</pre></div>
</div></div>
    <p class="img">
      <img src="figure/offset-x-spline-1.svg" width="30%">
    </p>
    <p>
    In order to render a variable-width X-spline, we must be able to
    calculate locations along the boundary of the variable-width X-spline.
    This document focuses on the function <code>grid.offsetXspline</code>
    from the 'vwline' package, which uses a generalised offset curve approach
    to calculate the bo