pan><span class="special">::</span><span class="identifier">convex_hull</span><span class="special">(</span><span class="identifier">poly</span><span class="special">,</span> <span class="identifier">hull</span><span class="special">);</span>

    <span class="keyword">using</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">dsv</span><span class="special">;</span>
    <span class="identif