lass="identifier">polygon</span><span class="special">&lt;</span><span class="identifier">point</span><span class="special">,</span> <span class="keyword">false</span><span class="special">,</span> <span class="keyword">false</span><span class="special">&gt;</span> <span class="identifier">polygon</span><span class="special">;</span> <span class="comment">// ccw, open polygon</span>
    <span class="keyword">typedef</span> <span class="identifier">boost</span><span class="special">::</span><span class="iden