         <a class="citerefentry" href="gluTessBeginPolygon"><span class="citerefentry"><span class="refentrytitle">gluTessBeginPolygon</span></span></a> and <code class="function">gluTessEndPolygon</code> delimit the
            definition of a convex, concave, or self-intersecting polygon. Within
            each <a class="citerefentry" href="gluTessBeginPolygon"><span class="citerefentry"><span class="refentrytitle">gluTessBeginPolygon</span></span></a>/<code class="function">gluTessEndPolygon</code> pair