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  <title>Boost Polygon Library: Point Concept</title>
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      <div style="padding: 5px;" align="center"> <img
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 title="www.boost.org home page" href="http://www.boost.org/"
 tabindex="2" style="border: medium none ;"> </a> </div>
      <div style="margin: 5px;">
      <h3 class="navbar">Contents</h3>
      <ul>
        <li><a href="index.htm">Boost.Polygon Main Page</a></li>
        <li><a href="gtl_design_overview.htm">Design Overview</a></li>
        <li><a href="gtl_isotropy.htm">Isotropy</a></li>
        <li><a href="gtl_coordinate_concept.htm">Coordinate Concept</a></li>
        <li><a href="gtl_interval_concept.htm">Interval Concept</a></li>
        <li>Point Concept</li>
        <li><a href="gtl_segment_concept.htm">Segment Concept</a></li>
        <li><a href="gtl_rectangle_concept.htm">Rectangle Concept</a></li>
        <li><a href="gtl_polygon_90_concept.htm">Polygon 90 Concept</a></li>
        <li><a href="gtl_polygon_90_with_holes_concept.htm">Polygon 90
With Holes Concept</a></li>
        <li><a href="gtl_polygon_45_concept.htm">Polygon 45 Concept</a></li>
        <li><a href="gtl_polygon_45_with_holes_concept.htm">Polygon 45
With Holes Concept</a></li>
        <li><a href="gtl_polygon_concept.htm">Polygon Concept</a></li>
        <li><a href="gtl_polygon_with_holes_concept.htm">Polygon With
Holes Concept</a></li>
        <li><a href="gtl_polygon_90_set_concept.htm">Polygon 90 Set
Concept</a></li>
        <li><a href="gtl_polygon_45_set_concept.htm">Polygon 45 Set
Concept</a></li>
        <li><a href="gtl_polygon_set_concept.htm">Polygon Set Concept</a></li>
        <li><a href="gtl_connectivity_extraction_90.htm">Connectivity
Extraction 90</a></li>
        <li><a href="gtl_connectivity_extraction_45.htm">Connectivity
Extraction 45</a></li>
        <li><a href="gtl_connectivity_extraction.htm">Connectivity
Extraction</a></li>
        <li><a href="gtl_property_merge_90.htm">Property Merge 90</a></li>
        <li><a href="gtl_property_merge_45.htm">Property Merge 45</a></li>
        <li><a href="gtl_property_merge.htm">Property Merge</a></li>
        <li><a href="voronoi_main.htm">Voronoi Main Page<br />
          </a></li>
        <li><a href="voronoi_benchmark.htm">Voronoi Benchmark</a><br />
        </li>
        <li><a href="voronoi_builder.htm">Voronoi Builder</a></li>
        <li><a href="voronoi_diagram.htm">Voronoi Diagram</a></li>
      </ul>
      <h3 class="navbar">Other Resources</h3>
      <ul>
        <li><a href="GTL_boostcon2009.pdf">GTL Boostcon 2009 Paper</a></li>
        <li><a href="GTL_boostcon_draft03.pdf">GTL Boostcon 2009
Presentation</a></li>
        <li><a href="analysis.htm">Performance Analysis</a></li>
        <li><a href="gtl_tutorial.htm">Layout Versus Schematic Tutorial</a></li>
        <li><a href="gtl_minkowski_tutorial.htm">Minkowski Sum Tutorial</a></li>
        <li><a href="voronoi_basic_tutorial.htm">Voronoi Basic Tutorial</a></li>
        <li><a href="voronoi_advanced_tutorial.htm">Voronoi Advanced
Tutorial</a></li>
      </ul>
      </div>
      <h3 class="navbar">Polygon Sponsor</h3>
      <div style="padding: 5px;" align="center"> <img
 src="images/intlogo.gif" border="0" height="51" width="127" /><a
 title="www.adobe.com home page" href="http://www.adobe.com/"
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<!-- End Header --><br />
      <p>
      </p>
      <h1>Point Concept</h1>
      <p> </p>
      <p> The point concept tag is <font face="Courier New">
point_concept</font></p>
      <p> To register a user defined type as a model of point concept,
specialize the geometry concept meta-function for that type.&nbsp; In
the example below <span
 style="font-family: Courier New,Courier,monospace;">CPoint</span> is
registered as a model of point&nbsp; concept.</p>
      <p> <font face="Courier New">template &lt;&gt;<br />
struct geometry_concept&lt;CPoint&gt; { typedef point_concept type; };</font></p>
      <p> The semantic of a point is that it has an x and y
coordinate.&nbsp; A std::pair&lt;int, int&gt;, boost::tuple&lt;int,
int&gt; or boost::array&lt;int, 2&gt; could all be made models of point
by simply providing indirect access to their elements through traits,
however, these objects cannot be made a model of both point and
interval in the same compilation unit, for obvious reason that
duplicate specialization of the geometry_concept struct is illegal, but
also because it would make overloading generic function by concept
ambiguous if a type modeled more than one concept.</p>
      <p> Below is shown the default point traits.&nbsp; Specialization
of these traits is required for types that don't conform to the default
behavior.</p>
      <p style="font-family: Courier New,Courier,monospace;"> template
&lt;typename T&gt;<br />
struct point_traits {<br />
&nbsp;&nbsp;&nbsp;&nbsp; typedef typename T::coordinate_type
coordinate_type;<br />
      <br />
&nbsp;&nbsp;&nbsp;&nbsp; static coordinate_type get(const T&amp; point,
orientation_2d orient) {<br />
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; return
point.get(orient);
      <br />
&nbsp;&nbsp;&nbsp;&nbsp; }<br />
};<br />
      <br />
template &lt;typename T&gt;<br />
struct point_mutable_traits {<br />
&nbsp;&nbsp;&nbsp;&nbsp; typedef typename T::coordinate_type
coordinate_type;<br />
      <br />
&nbsp;&nbsp;&nbsp;&nbsp; static void set(T&amp; point, orientation_2d
orient, typename point_traits&lt;T&gt;::coordinate_type value) {<br />
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
point.set(orient, value);
      <br />
&nbsp;&nbsp;&nbsp;&nbsp; }<br />
&nbsp;&nbsp;&nbsp;&nbsp; static T construct(typename
point_traits&lt;T&gt;::coordinate_type x_value,<br />
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
typename point_traits&lt;T&gt;::coordinate_type y_value) {<br />
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; return
T(x_value, y_value);
      <br />
&nbsp;&nbsp;&nbsp;&nbsp; }<br />
};</p>
      <p> Example code <a href="gtl_custom_point.htm">custom_point.cpp</a>
demonstrates how to map a user defined point class to the library
point_concept</p>
      <h2>Functions</h2>
      <table id="table1" border="1" width="100%">
        <tbody>
          <tr>
            <td width="586"><font face="Courier New">template
&lt;typename PointType&gt;<br />
coordinate_type <b>get</b>(const PointType&amp; point,<br />
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
orientation_2d)</font></td>
            <td>Expects a model of point. Returns the x or y coordinate
of the point, depending on the orientation_2d value.<br />
&nbsp;</td>
          </tr>
          <tr>
            <td width="586"><font face="Courier New">template
&lt;typename PointType&gt;<br />
void <b>set</b>(PointType&amp; point, orientation_2d,<br />
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; coordinate_type)</font></td>
            <td>Expects a model of point. Sets the x or y coordinate of
the point to the coordinate, depending on the orientation_2d&nbsp;
value. </td>
          </tr>
          <tr>
            <td width="586"><font face="Courier New">template
&lt;typename PointType&gt;<br />
PointType <b>construct</b>(coordinate_type x,<br />
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
coordinate_type y)</font></td>
            <td>Construct an object that is a model of point given x
and y coordinate values.</td>
          </tr>
          <tr>
            <td width="586"><font face="Courier New">template
&lt;typename PointType1, typename PointType2&gt;<br />
PointType1&amp; <b>assign</b>(PointType1&amp; left,<br />
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
const PointType2&amp; right)</font></td>
            <td>Copies data from right object that models point into
left object that models point.</td>
          </tr>
          <tr>
            <td width="586"><font face="Courier New">template
&lt;typename PointType1, typename PointType2&gt;<br />
bool <b>equivalence</b>(const </font><font face="Courier New">PointType1</font><font
 face="Courier New">&amp; point1,<br />
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
const </font><font face="Courier New">PointType2</font><font
 face="Courier New">&amp; point2)</font></td>
            <td>Given two objects that model point, compares and
returns true if their x and y values are respectively equal to each
other.</td>
          </tr>
          <tr>
            <td width="586"><font face="Courier New">template
&lt;typename PointType&gt;<br />
coordinate_type <b>x</b>(const </font><font face="Courier New">PointType</font><font
 face="Courier New">&amp; point)</font></td>
            <td>Returns the x coordinate of an object that models point.</td>
          </tr>
          <tr>
            <td width="586"><font face="Courier New">template
&lt;typename </font><font face="Courier New">PointType</font><font
 face="Courier New">&gt;<br />
coordinate_type <b>y</b>(const </font><font face="Courier New">PointType</font><font
 face="Courier New">&amp; point)</font></td>
            <td>Returns the y coordinate of an object that models point.</td>
          </tr>
          <tr>
            <td width="586"><font face="Courier New">template
&lt;typename </font><font face="Courier New">PointType</font><font
 face="Courier New">&gt;<br />
void <b>x</b>(p</font><font face="Courier New">PointType</font><font
 face="Courier New">&amp; point, coordinate_type )</font></td>
            <td>Sets the x coordinate of the object that models point
to the coordinate value.&nbsp; </td>
          </tr>
          <tr>
            <td width="586"><font face="Courier New">template
&lt;typename </font><font face="Courier New">PointType</font><font
 face="Courier New">&gt;<br />
void <b>y</b>(</font><font face="Courier New">PointType</font><font
 face="Courier New">&amp; point, coordinate_type )</font></td>
            <td>Sets the y coordinate of the object that models point
to the coordinate value.&nbsp; </td>
          </tr>
          <tr>
            <td width="586"><font face="Courier New">template
&lt;typename </font><font face="Courier New">PointType</font><font
 face="Courier New">&gt;<br />
point_type&amp; <b>scale_up</b>(</font><font face="Courier New">PointType</font><font
 face="Courier New">&amp; point, <br />
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
unsigned_area_type factor)</font></td>
            <td>Multiplies x and y coordinate of an object that models
point by unsigned factor.</td>
          </tr>
          <tr>
            <td width="586"><font face="Courier New">template
&lt;typename </font><font face="Courier New">PointType</font><font
 face="Courier New">&gt;<br />
point_type&amp; <b>scale_down</b>(</font><font face="Courier New">PointType</font><font
 face="Courier New">&amp; point, <br />
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
unsigned_area_type factor)</font></td>
            <td>Divides x and y coordinate of an object that models
point by unsigned factor.</td>
          </tr>
          <tr>
            <td width="586"><font face="Courier New">template
&lt;typename </font><font face="Courier New">PointType</font><font
 face="Courier New">, typename scaling_type&gt;<br />
point_type&amp; <b>scale</b>(</font><font face="Courier New">PointType</font><font
 face="Courier New">&amp; point,<br />
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
const scaling_type&amp; factor) </font></td>
            <td>Calls the scale member function of scaling type on the
x and y value of an object that models point and sets the point to the
scaled values.</td>
          </tr>
          <tr>
            <td width="586"><font face="Courier New">template
&lt;typename </font><font face="Courier New">PointType</font><font
 face="Courier New">, typename transform_type&gt;<br />
point_type&amp; <b>transform</b>(</font><font face="Courier New">PointType</font><font
 face="Courier New">&amp; point,<br />
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
const transform_type&amp; transform) </font></td>
            <td>Calls the transform member function of transform type
on the x and y value of an object that models point and sets the point
to the transformed values.</td>
          </tr>
          <tr>
            <td width="586"><font face="Courier New">template
&lt;typename </font><font face="Courier New">PointType</font><font
 face="Courier New">&gt;<br />
point_type&amp; <b>move</b>(</font><font face="Courier New">PointType</font><font
 face="Courier New">&amp; point, orientation_2d,<br />
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
coordinate_difference displacement)</font></td>
            <td>Adds displacement value to the coordinate of an object
that models point indicated by the orientation_2d.</td>
          </tr>
          <tr>
            <td width="586"><font face="Courier New">template
&lt;typename </font><font face="Courier New">PointType</font><font
 face="Courier New">1, typename PointType2&gt;<br />
            </font><font face="Courier New">PointType</font><font
 face="Courier New">1</font><font face="Courier New">&amp; <b>convolve</b>(</font><font
 face="Courier New">PointType</font><font face="Courier New">1</font><font
 face="Courier New">&amp; a,<br />
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
const </font><font face="Courier New">PointType2</font><font
 face="Courier New">&amp; b)</font></td>
            <td>Adds x coordinate of b to x coordinate of a and adds y
coordinate of b to y coordinate of a.</td>
          </tr>
          <tr>
            <td width="586"><font face="Courier New">template
&lt;typename </font><font face="Courier New">PointType</font><font
 face="Courier New">1</font><font face="Courier New">, typename </font><font
 face="Courier New">PointType</font><span
 style="font-family: Courier New;">2</span><font face="Courier New">&gt;<br />
            </font><font face="Courier New">PointType</font><font
 face="Courier New">1</font><font face="Courier New">,</font><font
 face="Courier New">&amp; <b>deconvolve</b>(</font><font
 face="Courier New">PointType</font><font face="Courier New">1</font><font
 face="Courier New">&amp; a,<br />
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
const </font><font face="Courier New">PointType</font><span
 style="font-family: Courier New;">2</span><font face="Courier New">&gt;</font><font
 face="Courier New">&amp; b)</font></td>
            <td>Subtracts x coordinate of b from x coordinate of a and
subtracts y coordinate of b from y coordinate of a. </td>
          </tr>
          <tr>
            <td width="586"><font face="Courier New">template
&lt;typename </font><font face="Courier New">PointType</font><font
 face="Courier New">1</font><font face="Courier New">, typename </font><font
 face="Courier New">PointType</font><span
 style="font-family: Courier New;">2</span><font face="Courier New">&gt;<br />
distance_type <b>euclidean_distance</b>(<br />
&nbsp;&nbsp;&nbsp; const </font><font face="Courier New">PointType</font><font
 face="Courier New">1</font><font face="Courier New">&amp;, const </font><font
 face="Courier New">PointType</font><span
 style="font-family: Courier New;">2</span><font face="Courier New">&amp;)</font></td>
            <td>Returns the distance from an object that models point
to a second object that models point.</td>
          </tr>
          <tr>
            <td width="586"><font face="Courier New">template &lt;</font><font
 face="Courier New">typename </font><font face="Courier New">PointType</font><font
 face="Courier New">1</font><font face="Courier New">, typename </font><font
 face="Courier New">PointType</font><span
 style="font-family: Courier New;">2</span><font face="Courier New">&gt;<br />
coordinate_difference <b>euclidean_distance</b>(<br />
&nbsp;&nbsp;&nbsp; const </font><font face="Courier New">PointType</font><font
 face="Courier New">1</font><font face="Courier New">&amp;, </font><font
 face="Courier New">const PointType</font><span
 style="font-family: Courier New;">2&amp;,</span><font
 face="Courier New"> orientation_2d)</font></td>
            <td>Returns the distance from an object that models point
to a coordinate in the given orientation_2d.</td>
          </tr>
          <tr>
            <td width="586"><font face="Courier New">template &lt;</font><font
 face="Courier New">typename </font><font face="Courier New">PointType</font><font
 face="Courier New">1</font><font face="Courier New">, typename </font><font
 face="Courier New">PointType</font><span
 style="font-family: Courier New;">2</span><font face="Courier New">&gt;<br />
coordinate_difference <b>manhattan_distance</b>(<br />
&nbsp;&nbsp;&nbsp; </font><font face="Courier New">const </font><font
 face="Courier New">PointType</font><font face="Courier New">1</font><font
 face="Courier New">&amp;, </font><font face="Courier New">const
PointType</font><span style="font-family: Courier New;">2&amp;</span><font
 face="Courier New">)</font></td>
            <td>Returns the distance in x plus the distance in y from
an object that models point to a second object that models point.</td>
          </tr>
          <tr>
            <td width="586"><font face="Courier New">template &lt;</font><font
 face="Courier New">typename </font><font face="Courier New">PointType</font><font
 face="Courier New">1</font><font face="Courier New">, typename </font><font
 face="Courier New">PointType</font><span
 style="font-family: Courier New;">2</span><font face="Courier New">&gt;<br />
coordinate_difference <b>distance_squared</b>(<br />
&nbsp;&nbsp;&nbsp; </font><font face="Courier New">const </font><font
 face="Courier New">PointType</font><font face="Courier New">1</font><font
 face="Courier New">&amp;, </font><font face="Courier New">const
PointType</font><span style="font-family: Courier New;">2&amp;</span><font
 face="Courier New">)</font></td>
            <td>Returns the square of the distance in x plus the square
of the distance in y from an object that models point to a second
object that models point.</td>
          </tr>
        </tbody>
      </table>
      <h1>Point Data</h1>
      <p> </p>
      <p>The library provides a model of point concept declared
      <font face="Courier New">template&lt;typename T&gt; point_data </font>where
T is the coordinate type.</p>
      <p>This data type is used internally when a point is needed and
is available to the library user who finds it convenient to use a
library point data type instead of providing their own.&nbsp; The data
type is implemented to be convenient to use with the library traits.</p>
      <p>Example code <a href="gtl_point_usage.htm">point_usage.cpp</a>
demonstrates using the library provided point data type and functions</p>
      <h2>Members</h2>
      <table id="table2" border="1" width="100%">
        <tbody>
          <tr>
            <td width="586"><b><font face="Courier New">coordinate_type</font></b></td>
            <td>T</td>
          </tr>
          <tr>
            <td width="586"><font face="Courier New"><b>point_data</b>()</font></td>
            <td>Default constructs the two coordinate values of the
point.</td>
          </tr>
          <tr>
            <td width="586"><font face="Courier New"><b>point_data</b>(T
x, T y)</font></td>
            <td>Constructs an interval with two coordinates.</td>
          </tr>
          <tr>
            <td width="586"><font face="Courier New"><b>point_data</b>(const
point_data&amp; that)</font></td>
            <td>Copy construct</td>
          </tr>
          <tr>
            <td width="586"><font face="Courier New">point_data&amp; <b>operator=</b>(const
point_data&amp; that)</font></td>
            <td>Assignment operator.</td>
          </tr>
          <tr>
            <td width="586"><font face="Courier New">template
&lt;typename PointType&gt;<br />
point_data&amp; <b>operator=</b>(const PointType&amp; that) const</font></td>
            <td>Assign from an object that is a model of point.</td>
          </tr>
          <tr>
            <td width="586"><font face="Courier New">bool<b> operator==</b>(const
            </font><font face="Courier New">point_data</font><font
 face="Courier New">&amp; that) const</font></td>
            <td>Equality operator overload.<br />
            </td>
          </tr>
          <tr>
            <td width="586"><font face="Courier New">bool<b> operator!=</b>(const
            </font><font face="Courier New">point_data</font><font
 face="Courier New">&amp; that) const</font></td>
            <td>Inequality operator overload.</td>
          </tr>
          <tr>
            <td width="586"><font face="Courier New"><b> </b>bool<b>
operator&lt;</b>(const </font><font face="Courier New">point_data</font><font
 face="Courier New">&amp; that) const</font></td>
            <td>Compares y coordinates then x coordinates to break ties.</td>
          </tr>
          <tr>
            <td width="586"><font face="Courier New"><b> </b>bool<b>
operator&lt;=</b>(const </font><font face="Courier New">point_data</font><font
 face="Courier New">&amp; that) const</font></td>
            <td>Compares y coordinates then x coordinates to break ties.</td>
          </tr>
          <tr>
            <td width="586"><font face="Courier New"><b> </b>bool<b>
operator&gt;</b>(const </font><font face="Courier New">point_data</font><font
 face="Courier New">&amp; that) const</font></td>
            <td>Compares low coordinates then high coordinates to break
ties.</td>
          </tr>
          <tr>
            <td width="586"><font face="Courier New">bool<b>
operator&gt;=</b>(const </font><font face="Courier New">point_data</font><font
 face="Courier New">&amp; that) const</font></td>
            <td>Compares low coordinates then high coordinates to break
ties.</td>
          </tr>
          <tr>
            <td width="586"><font face="Courier New">T <b>get</b>(orientation_2d
orient) const</font></td>
            <td>Get the coordinate in the given orientation.</td>
          </tr>
          <tr>
            <td width="586"><font face="Courier New">T <b>x</b>() const</font></td>
            <td>Get the coordinate in the horizontal orientation.</td>
          </tr>
          <tr>
            <td width="586"><font face="Courier New">T <b>y</b>() const</font></td>
            <td>Get the coordinate in the vertical orientation.</td>
          </tr>
          <tr>
            <td width="586"><font face="Courier New">void <b>set</b>(orientation_2d
orient, T value)</font></td>
            <td>Sets the coordinate in the given orientation to the
value.</td>
          </tr>
          <tr>
            <td width="586"><font face="Courier New">void <b>x</b>(T
value)</font></td>
            <td>Sets the coordinate in the horizontal orientation to
the value.</td>
          </tr>
          <tr>
            <td width="586"><font face="Courier New">void <b>y</b>(T
value)</font></td>
            <td>Sets the coordinate in the vertical orientation to the
value.</td>
          </tr>
        </tbody>
      </table>
      </td>
    </tr>
    <tr>
      <td style="background-color: rgb(238, 238, 238);" nowrap="1"
 valign="top"> &nbsp;</td>
      <td
 style="padding-left: 10px; padding-right: 10px; padding-bottom: 10px;"
 valign="top" width="100%">
      <table class="docinfo" id="table3" frame="void" rules="none">
        <colgroup> <col class="docinfo-name" /><col
 class="docinfo-content" /> </colgroup> <tbody valign="top">
          <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>
          </tr>
        </tbody>
      </table>
      </td>
    </tr>
  </tbody>
</table>
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