 also have z coordinates.</p>
<h2><a name="label-66" id="label-66">class Polygon</a></h2><!-- RDLabel: "class Polygon" -->
<p>Polygon is one (or more) closed arc.</p>
<dl>
<dt><a name="label-67" id="label-67"><code>Polygon::new <var>point</var>, <var>point</var>, ...</code></a></dt><!-- RDLabel: "Polygon::new point, point, ..." -->
<dd>
Constructs a object with single polygon.</dd>
<dt><a name="label-68" id="label-68"><code>Polygon::new [<var>point</var>, <var>point</var>, ...], [<var>point</var>, <var>poin