projects / ceph.git / blame
| Commit | Line | Data |
|---|---|---|
| 7c673cae FG |
1 | <html> |
| 2 | ||
| 3 | <head> | |
| 4 | <meta http-equiv="Content-Type" content="text/html; charset=windows-1252"> | |
| 5 | <title>Point Usage</title> | |
| 6 | </head> | |
| 7 | ||
| 8 | <body> | |
| 9 | ||
| 10 | <p><font face="Courier New">/*<br> | |
| 11 | Copyright 2008 Intel Corporation<br> | |
| 12 | <br> | |
| 13 | Use, modification and distribution are subject to the Boost Software License,<br> | |
| 14 | Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at<br> | |
| 15 | http://www.boost.org/LICENSE_1_0.txt).<br> | |
| 16 | */<br> | |
| 17 | #include <boost/polygon/polygon.hpp><br> | |
| 18 | #include <cassert><br> | |
| 19 | namespace gtl = boost::polygon;<br> | |
| 20 | using namespace boost::polygon::operators;<br><br> | |
| 21 | int main() {<br> | |
| 22 | //constructing a gtl point<br> | |
| 23 | typedef gtl::point_data<int> Point;<br> | |
| 24 | int x = 10;<br> | |
| 25 | int y = 20;<br> | |
| 26 | Point pt(x, y);<br> | |
| 27 | assert(gtl::x(pt) == 10);<br> | |
| 28 | assert(gtl::y(pt) == 20);<br> | |
| 29 | <br> | |
| 30 | //a quick primer in isotropic point access<br> | |
| 31 | typedef gtl::orientation_2d O;<br> | |
| 32 | using gtl::HORIZONTAL;<br> | |
| 33 | using gtl::VERTICAL;<br> | |
| 34 | O o = HORIZONTAL;<br> | |
| 35 | assert(gtl::x(pt) == gtl::get(pt, o));<br> | |
| 36 | <br> | |
| 37 | o = o.get_perpendicular();<br> | |
| 38 | assert(o == VERTICAL);<br> | |
| 39 | assert(gtl::y(pt) == gtl::get(pt, o));<br> | |
| 40 | <br> | |
| 41 | gtl::set(pt, o, 30);<br> | |
| 42 | assert(gtl::y(pt) == 30);<br> | |
| 43 | <br> | |
| 44 | //using some of the library functions<br> | |
| 45 | Point pt2(10, 30);<br> | |
| 46 | assert(gtl::equivalence(pt, pt2));<br> | |
| 47 | <br> | |
| 48 | gtl::transformation<int> tr(gtl::axis_transformation::SWAP_XY);<br> | |
| 49 | gtl::transform(pt, tr);<br> | |
| 50 | assert(gtl::equivalence(pt, Point(30, 10)));<br> | |
| 51 | <br> | |
| 52 | gtl::transformation<int> tr2 = tr.inverse();<br> | |
| 53 | assert(tr == tr2); //SWAP_XY is its own inverse transform<br> | |
| 54 | <br> | |
| 55 | gtl::transform(pt, tr2);<br> | |
| 56 | assert(gtl::equivalence(pt, pt2)); //the two points are equal again<br> | |
| 57 | <br> | |
| 58 | gtl::move(pt, o, 10); //move pt 10 units in y<br> | |
| 59 | assert(gtl::euclidean_distance(pt, pt2) == 10.0f);<br> | |
| 60 | <br> | |
| 61 | gtl::move(pt, o.get_perpendicular(), 10); //move pt 10 units in x<br> | |
| 62 | assert(gtl::manhattan_distance(pt, pt2) == 20);<br> | |
| 63 | <br> | |
| 64 | return 0;<br> | |
| 65 | }<br> | |
| 66 | </font></p> | |
| 67 | ||
| 68 | ||
| 69 | <table class="docinfo" rules="none" frame="void" id="table1"> | |
| 70 | <colgroup> | |
| 71 | <col class="docinfo-name"><col class="docinfo-content"> | |
| 72 | </colgroup> | |
| 73 | <tbody vAlign="top"> | |
| 74 | <tr> | |
| 75 | <th class="docinfo-name">Copyright:</th> | |
| 76 |