put data on <tt>stdin</tt> consists of:</p>
<ul>
    <li>dimension
    <li>number of points</li>
    <li>point coordinates</li>
</ul>

<p>Use I/O redirection (e.g., qdelaunay &lt; data.txt), a pipe (e.g., rbox 10 | qdelaunay),
or the '<a href="qh-optt.html#TI">TI</a>' option (e.g., qdelaunay TI data.txt).

<p>For example, this is four cocircular points inside a square.  Its Delaunay
triangulation contains 8 triangles and one four-sided
figure.
<p>
<blockquote>
<tt>rbox s 4 W0 c G1 D2 &gt; data</tt>
<blockqu