acet()</a>
</p>

<p>If a point is interior to the convex hull of the input set, it
is interior to the adjacent vertices of the Delaunay
triangulation. This is demonstrated by the following pipe for
point 0:

<pre>
    qdelaunay &lt;data s FQ QV0 p | qconvex s Qb3:0B3:0 p
</pre>

<p>The first call to qdelaunay returns the neighboring points of
point 0 in the Delaunay triangulation. The second call to qconvex
returns the vertices of the convex hull of these points (after
dropping the lifted coordinate). If po