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<p><font face="Courier New">/*<br>
Copyright 2008 Intel Corporation<br>
<br>
Use, modification and distribution are subject to the Boost Software License,<br>
Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at<br>
http://www.boost.org/LICENSE_1_0.txt).<br>
*/<br>
#include &lt;boost/polygon/polygon.hpp&gt;<br>
#include &lt;cassert&gt;<br>
namespace gtl = boost::polygon;<br>
using namespace boost::polygon::operators;<br><br>
int main() {<br>
&nbsp; //constructing a gtl point<br>
&nbsp; typedef gtl::point_data&lt;int&gt; Point;<br>
&nbsp; int x = 10;<br>
&nbsp; int y = 20;<br>
&nbsp; Point pt(x, y);<br>
&nbsp; assert(gtl::x(pt) == 10);<br>
&nbsp; assert(gtl::y(pt) == 20);<br>
&nbsp; <br>
&nbsp; //a quick primer in isotropic point access<br>
&nbsp; typedef gtl::orientation_2d O;<br>
&nbsp; using gtl::HORIZONTAL;<br>
&nbsp; using gtl::VERTICAL;<br>
&nbsp; O o = HORIZONTAL;<br>
&nbsp; assert(gtl::x(pt) == gtl::get(pt, o));<br>
&nbsp; <br>
&nbsp; o = o.get_perpendicular();<br>
&nbsp; assert(o == VERTICAL);<br>
&nbsp; assert(gtl::y(pt) == gtl::get(pt, o));<br>
<br>
&nbsp; gtl::set(pt, o, 30);<br>
&nbsp; assert(gtl::y(pt) == 30);<br>
<br>
&nbsp; //using some of the library functions<br>
&nbsp; Point pt2(10, 30);<br>
&nbsp; assert(gtl::equivalence(pt, pt2));<br>
<br>
&nbsp; gtl::transformation&lt;int&gt; tr(gtl::axis_transformation::SWAP_XY);<br>
&nbsp; gtl::transform(pt, tr);<br>
&nbsp; assert(gtl::equivalence(pt, Point(30, 10)));<br>
<br>
&nbsp; gtl::transformation&lt;int&gt; tr2 = tr.inverse();<br>
&nbsp; assert(tr == tr2); //SWAP_XY is its own inverse transform<br>
<br>
&nbsp; gtl::transform(pt, tr2);<br>
&nbsp; assert(gtl::equivalence(pt, pt2)); //the two points are equal again<br>
<br>
&nbsp; gtl::move(pt, o, 10); //move pt 10 units in y<br>
&nbsp; assert(gtl::euclidean_distance(pt, pt2) == 10.0f);<br>
<br>
&nbsp; gtl::move(pt, o.get_perpendicular(), 10); //move pt 10 units in x<br>
&nbsp; assert(gtl::manhattan_distance(pt, pt2) == 20);<br>
<br>
&nbsp; return 0;<br>
}<br>
&nbsp;</font></p>


<table class="docinfo" rules="none" frame="void" id="table1">
	<colgroup>
		<col class="docinfo-name"><col class="docinfo-content">
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		<tr>
			<th class="docinfo-name">Copyright:</th>
			<td>Copyright © Intel Corporation 2008-2010.</td>
		</tr>
		<tr class="field">
			<th class="docinfo-name">License:</th>
			<td class="field-body">Distributed under the Boost Software License, 
			Version 1.0. (See accompanying file <tt class="literal">
			<span class="pre">LICENSE_1_0.txt</span></tt> or copy at
			<a class="reference" target="_top" href="http://www.boost.org/LICENSE_1_0.txt">
			http://www.boost.org/LICENSE_1_0.txt</a>)</td>
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