91 lines
2.8 KiB
HTML
91 lines
2.8 KiB
HTML
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
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<title>Point Usage</title>
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</head>
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<body>
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<p><font face="Courier New">/*<br>
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Copyright 2008 Intel Corporation<br>
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<br>
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Use, modification and distribution are subject to the Boost Software License,<br>
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Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at<br>
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http://www.boost.org/LICENSE_1_0.txt).<br>
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*/<br>
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#include <boost/polygon/polygon.hpp><br>
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#include <cassert><br>
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namespace gtl = boost::polygon;<br>
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using namespace boost::polygon::operators;<br><br>
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int main() {<br>
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//constructing a gtl point<br>
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typedef gtl::point_data<int> Point;<br>
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int x = 10;<br>
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int y = 20;<br>
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Point pt(x, y);<br>
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assert(gtl::x(pt) == 10);<br>
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assert(gtl::y(pt) == 20);<br>
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<br>
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//a quick primer in isotropic point access<br>
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typedef gtl::orientation_2d O;<br>
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using gtl::HORIZONTAL;<br>
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using gtl::VERTICAL;<br>
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O o = HORIZONTAL;<br>
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assert(gtl::x(pt) == gtl::get(pt, o));<br>
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<br>
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o = o.get_perpendicular();<br>
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assert(o == VERTICAL);<br>
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assert(gtl::y(pt) == gtl::get(pt, o));<br>
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<br>
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gtl::set(pt, o, 30);<br>
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assert(gtl::y(pt) == 30);<br>
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<br>
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//using some of the library functions<br>
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Point pt2(10, 30);<br>
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assert(gtl::equivalence(pt, pt2));<br>
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<br>
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gtl::transformation<int> tr(gtl::axis_transformation::SWAP_XY);<br>
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gtl::transform(pt, tr);<br>
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assert(gtl::equivalence(pt, Point(30, 10)));<br>
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<br>
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gtl::transformation<int> tr2 = tr.inverse();<br>
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assert(tr == tr2); //SWAP_XY is its own inverse transform<br>
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<br>
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gtl::transform(pt, tr2);<br>
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assert(gtl::equivalence(pt, pt2)); //the two points are equal again<br>
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<br>
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gtl::move(pt, o, 10); //move pt 10 units in y<br>
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assert(gtl::euclidean_distance(pt, pt2) == 10.0f);<br>
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<br>
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gtl::move(pt, o.get_perpendicular(), 10); //move pt 10 units in x<br>
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assert(gtl::manhattan_distance(pt, pt2) == 20);<br>
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<br>
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return 0;<br>
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}<br>
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</font></p>
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<table class="docinfo" rules="none" frame="void" id="table1">
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<colgroup>
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<col class="docinfo-name"><col class="docinfo-content">
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</colgroup>
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<tbody vAlign="top">
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<tr>
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<th class="docinfo-name">Copyright:</th>
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<td>Copyright <20> Intel Corporation 2008-2010.</td>
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</tr>
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<tr class="field">
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<th class="docinfo-name">License:</th>
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<td class="field-body">Distributed under the Boost Software License,
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Version 1.0. (See accompanying file <tt class="literal">
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<span class="pre">LICENSE_1_0.txt</span></tt> or copy at
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<a class="reference" target="_top" href="http://www.boost.org/LICENSE_1_0.txt">
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http://www.boost.org/LICENSE_1_0.txt</a>)</td>
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</tr>
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</table>
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</body>
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</html>
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