470 lines
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470 lines
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<a href="#pub-methods">Public Member Functions</a> |
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<div class="title">geos::algorithm::HCoordinate Class Reference</div> </div>
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<p>Represents a homogeneous coordinate in a 2-D coordinate space.
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<a href="classgeos_1_1algorithm_1_1HCoordinate.html#details">More...</a></p>
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<p><code>#include <<a class="el" href="HCoordinate_8h_source.html">HCoordinate.h</a>></code></p>
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<table class="memberdecls">
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a>
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Public Member Functions</h2></td></tr>
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<tr class="memitem:a4a67749c1d316fcb7372d035fd7ca5ac"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1algorithm_1_1HCoordinate.html#a4a67749c1d316fcb7372d035fd7ca5ac">HCoordinate</a> ()</td></tr>
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<tr class="separator:a4a67749c1d316fcb7372d035fd7ca5ac"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a026be110f66ceccd96133b1c58f9ec4a"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1algorithm_1_1HCoordinate.html#a026be110f66ceccd96133b1c58f9ec4a">HCoordinate</a> (double _x, double _y, double _w)</td></tr>
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<tr class="separator:a026be110f66ceccd96133b1c58f9ec4a"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:acad3b93c19d3931858bbe2becd55dfaa"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1algorithm_1_1HCoordinate.html#acad3b93c19d3931858bbe2becd55dfaa">HCoordinate</a> (const <a class="el" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a> &p)</td></tr>
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<tr class="separator:acad3b93c19d3931858bbe2becd55dfaa"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:abead4c79fdda8c9d74760d447ea41c22"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1algorithm_1_1HCoordinate.html#abead4c79fdda8c9d74760d447ea41c22">HCoordinate</a> (const <a class="el" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a> &p1, const <a class="el" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a> &p2)</td></tr>
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<tr class="memdesc:abead4c79fdda8c9d74760d447ea41c22"><td class="mdescLeft"> </td><td class="mdescRight">Constructs a homogeneous coordinate which is the intersection of the lines define by the homogenous coordinates represented by two <a class="el" href="classgeos_1_1geom_1_1Coordinate.html">Coordinates</a>. <a href="#abead4c79fdda8c9d74760d447ea41c22">More...</a><br /></td></tr>
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<tr class="separator:abead4c79fdda8c9d74760d447ea41c22"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a05bc939350a0db33d52a2d1191c4aed3"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1algorithm_1_1HCoordinate.html#a05bc939350a0db33d52a2d1191c4aed3">HCoordinate</a> (const <a class="el" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a> &p1, const <a class="el" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a> &p2, const <a class="el" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a> &q1, const <a class="el" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a> &q2)</td></tr>
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<tr class="separator:a05bc939350a0db33d52a2d1191c4aed3"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a32f7c685de546adea70f653651b7e704"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1algorithm_1_1HCoordinate.html#a32f7c685de546adea70f653651b7e704">HCoordinate</a> (const <a class="el" href="classgeos_1_1algorithm_1_1HCoordinate.html">HCoordinate</a> &p1, const <a class="el" href="classgeos_1_1algorithm_1_1HCoordinate.html">HCoordinate</a> &p2)</td></tr>
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<tr class="memitem:acfafff6149c12be6412297de1b91da18"><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1algorithm_1_1HCoordinate.html#acfafff6149c12be6412297de1b91da18">getX</a> () const </td></tr>
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<tr class="memitem:a48ff57bc949a5694d27bc15c69a0f20f"><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1algorithm_1_1HCoordinate.html#a48ff57bc949a5694d27bc15c69a0f20f">getY</a> () const </td></tr>
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<tr class="memitem:ac42c55d80d4d2243572e939945904d52"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1algorithm_1_1HCoordinate.html#ac42c55d80d4d2243572e939945904d52">getCoordinate</a> (<a class="el" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a> &ret) const </td></tr>
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Static Public Member Functions</h2></td></tr>
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<tr class="memitem:ae95ed7130fb60c0fca2d49f5f020a881"><td class="memItemLeft" align="right" valign="top">static void </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1algorithm_1_1HCoordinate.html#ae95ed7130fb60c0fca2d49f5f020a881">intersection</a> (const <a class="el" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a> &p1, const <a class="el" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a> &p2, const <a class="el" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a> &q1, const <a class="el" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a> &q2, <a class="el" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a> &ret)</td></tr>
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<tr class="memdesc:ae95ed7130fb60c0fca2d49f5f020a881"><td class="mdescLeft"> </td><td class="mdescRight">Computes the (approximate) intersection point between two line segments using homogeneous coordinates. <a href="#ae95ed7130fb60c0fca2d49f5f020a881">More...</a><br /></td></tr>
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Public Attributes</h2></td></tr>
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<tr class="memitem:aaffba09a457501dddd625ead26ee6268"><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1algorithm_1_1HCoordinate.html#aaffba09a457501dddd625ead26ee6268">x</a></td></tr>
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<tr class="memitem:add131771cc964e3257da99f961d61241"><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1algorithm_1_1HCoordinate.html#add131771cc964e3257da99f961d61241">y</a></td></tr>
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<tr class="memitem:a6f4c1058ee12120cec05069e87ec9a9f"><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1algorithm_1_1HCoordinate.html#a6f4c1058ee12120cec05069e87ec9a9f">w</a></td></tr>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="friends"></a>
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Friends</h2></td></tr>
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<tr class="memitem:ac2d4ad5bbaf48dcfdb8eaa7c42a3732e"><td class="memItemLeft" align="right" valign="top">std::ostream & </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1algorithm_1_1HCoordinate.html#ac2d4ad5bbaf48dcfdb8eaa7c42a3732e">operator<<</a> (std::ostream &o, const <a class="el" href="classgeos_1_1algorithm_1_1HCoordinate.html">HCoordinate</a> &c)</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
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<div class="textblock"><p>Represents a homogeneous coordinate in a 2-D coordinate space. </p>
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<p><a class="el" href="classgeos_1_1algorithm_1_1HCoordinate.html" title="Represents a homogeneous coordinate in a 2-D coordinate space. ">HCoordinate</a> are used as a clean way of computing intersections between line segments. </p>
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<p>Definition at line <a class="el" href="HCoordinate_8h_source.html#l00044">44</a> of file <a class="el" href="HCoordinate_8h_source.html">HCoordinate.h</a>.</p>
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</div><h2 class="groupheader">Constructor & Destructor Documentation</h2>
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<p>Constructs a homogeneous coordinate which is the intersection of the lines define by the homogenous coordinates represented by two <a class="el" href="classgeos_1_1geom_1_1Coordinate.html">Coordinates</a>. </p>
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<dl class="params"><dt>Parameters</dt><dd>
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<td class="memname">void geos::algorithm::HCoordinate::getCoordinate </td>
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<td class="memname">double geos::algorithm::HCoordinate::getX </td>
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<td class="memname">double geos::algorithm::HCoordinate::getY </td>
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<p>Computes the (approximate) intersection point between two line segments using homogeneous coordinates. </p>
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<dl class="section note"><dt>Note</dt><dd>this algorithm is not numerically stable; i.e. it can produce intersection points which lie outside the envelope of the line segments themselves. In order to increase the precision of the calculation input points should be normalized before passing them to this routine. </dd></dl>
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<h2 class="groupheader">Member Data Documentation</h2>
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<p>Definition at line <a class="el" href="HCoordinate_8h_source.html#l00066">66</a> of file <a class="el" href="HCoordinate_8h_source.html">HCoordinate.h</a>.</p>
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<p>Definition at line <a class="el" href="HCoordinate_8h_source.html#l00066">66</a> of file <a class="el" href="HCoordinate_8h_source.html">HCoordinate.h</a>.</p>
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<p>Definition at line <a class="el" href="HCoordinate_8h_source.html#l00066">66</a> of file <a class="el" href="HCoordinate_8h_source.html">HCoordinate.h</a>.</p>
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<hr/>The documentation for this class was generated from the following file:<ul>
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<li><a class="el" href="HCoordinate_8h_source.html">HCoordinate.h</a></li>
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