77 lines
3.0 KiB
HTML
77 lines
3.0 KiB
HTML
<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>Polygon 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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//lets construct a 10x10 rectangle shaped polygon<br>
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typedef gtl::polygon_data<int> Polygon;<br>
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typedef gtl::polygon_traits<Polygon>::point_type Point;<br>
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Point pts[] = {gtl::construct<Point>(0, 0),<br>
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gtl::construct<Point>(10, 0),<br>
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gtl::construct<Point>(10, 10),<br>
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gtl::construct<Point>(0, 10) };<br>
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Polygon poly;<br>
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gtl::set_points(poly, pts, pts+4);<br>
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<br>
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//now lets see what we can do with this polygon<br>
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assert(gtl::area(poly) == 100.0f);<br>
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assert(gtl::contains(poly, gtl::construct<Point>(5, 5)));<br>
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assert(!gtl::contains(poly, gtl::construct<Point>(15, 5)));<br>
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gtl::rectangle_data<int> rect;<br>
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assert(gtl::extents(rect, poly)); //get bounding box of poly<br>
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assert(gtl::equivalence(rect, poly)); //hey, that's slick<br>
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assert(gtl::winding(poly) == gtl::COUNTERCLOCKWISE);<br>
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assert(gtl::perimeter(poly) == 40.0f);<br>
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<br>
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//add 5 to all coords of poly<br>
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gtl::convolve(poly, gtl::construct<Point>(5, 5));<br>
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//multiply all coords of poly by 2<br>
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gtl::scale_up(poly, 2);<br>
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gtl::set_points(rect, gtl::point_data<int>(10, 10),<br>
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gtl::point_data<int>(30, 30));<br>
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assert(gtl::equivalence(poly, rect));<br>
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return 0;<br>
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}<br>
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//Now you know how to use the built in polygon data type<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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