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645 lines
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<li class="navelem"><a class="el" href="namespacegeos.html">geos</a></li><li class="navelem"><a class="el" href="namespacegeos_1_1operation.html">operation</a></li><li class="navelem"><a class="el" href="namespacegeos_1_1operation_1_1intersection.html">intersection</a></li><li class="navelem"><a class="el" href="classgeos_1_1operation_1_1intersection_1_1RectangleIntersectionBuilder.html">RectangleIntersectionBuilder</a></li> </ul>
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<div class="title">geos::operation::intersection::RectangleIntersectionBuilder Class Reference</div> </div>
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<p>Rebuild geometries from subpaths left by clipping with a rectangle.
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<a href="classgeos_1_1operation_1_1intersection_1_1RectangleIntersectionBuilder.html#details">More...</a></p>
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<p><code>#include <<a class="el" href="RectangleIntersectionBuilder_8h_source.html">RectangleIntersectionBuilder.h</a>></code></p>
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Collaboration diagram for geos::operation::intersection::RectangleIntersectionBuilder:</div>
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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:acf3ea11d830fbd31abf5aa3c8b5b6178"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1intersection_1_1RectangleIntersectionBuilder.html#acf3ea11d830fbd31abf5aa3c8b5b6178">~RectangleIntersectionBuilder</a> ()</td></tr>
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<tr class="separator:acf3ea11d830fbd31abf5aa3c8b5b6178"><td class="memSeparator" colspan="2"> </td></tr>
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</table><table class="memberdecls">
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pri-methods"></a>
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Private Member Functions</h2></td></tr>
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<tr class="memitem:abf6d587b88eac5e12f96b892919a6293"><td class="memItemLeft" align="right" valign="top">std::unique_ptr< <a class="el" href="classgeos_1_1geom_1_1Geometry.html">geom::Geometry</a> > </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1intersection_1_1RectangleIntersectionBuilder.html#abf6d587b88eac5e12f96b892919a6293">build</a> ()</td></tr>
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<tr class="memdesc:abf6d587b88eac5e12f96b892919a6293"><td class="mdescLeft"> </td><td class="mdescRight">Build the result geometry from partial results and clean up. <a href="#abf6d587b88eac5e12f96b892919a6293">More...</a><br /></td></tr>
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<tr class="separator:abf6d587b88eac5e12f96b892919a6293"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a761e194726a14c10c3f603cde5d2d7ea"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1intersection_1_1RectangleIntersectionBuilder.html#a761e194726a14c10c3f603cde5d2d7ea">reconnectPolygons</a> (const <a class="el" href="classgeos_1_1operation_1_1intersection_1_1Rectangle.html">Rectangle</a> &rect)</td></tr>
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<tr class="memdesc:a761e194726a14c10c3f603cde5d2d7ea"><td class="mdescLeft"> </td><td class="mdescRight">Build polygons from parts left by clipping one. <a href="#a761e194726a14c10c3f603cde5d2d7ea">More...</a><br /></td></tr>
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<tr class="separator:a761e194726a14c10c3f603cde5d2d7ea"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ad58f8807531a7e53e9cb39e1badc6108"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1intersection_1_1RectangleIntersectionBuilder.html#ad58f8807531a7e53e9cb39e1badc6108">reconnect</a> ()</td></tr>
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<tr class="memitem:a8a406bef2bfee831f2e573732b24b1b1"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1intersection_1_1RectangleIntersectionBuilder.html#a8a406bef2bfee831f2e573732b24b1b1">reverseLines</a> ()</td></tr>
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<tr class="separator:a8a406bef2bfee831f2e573732b24b1b1"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:aeaeb7f82ee08ea02a53545f23e11b8c3"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1intersection_1_1RectangleIntersectionBuilder.html#aeaeb7f82ee08ea02a53545f23e11b8c3">release</a> (<a class="el" href="classgeos_1_1operation_1_1intersection_1_1RectangleIntersectionBuilder.html">RectangleIntersectionBuilder</a> &parts)</td></tr>
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<tr class="separator:aeaeb7f82ee08ea02a53545f23e11b8c3"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a43ede4f5f740de7baf2b562f1cc28807"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1intersection_1_1RectangleIntersectionBuilder.html#a43ede4f5f740de7baf2b562f1cc28807">add</a> (<a class="el" href="classgeos_1_1geom_1_1Polygon.html">geom::Polygon</a> *g)</td></tr>
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<tr class="separator:a43ede4f5f740de7baf2b562f1cc28807"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:acdacc25934c6befd91a64d418ce1e182"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1intersection_1_1RectangleIntersectionBuilder.html#acdacc25934c6befd91a64d418ce1e182">add</a> (<a class="el" href="classgeos_1_1geom_1_1LineString.html">geom::LineString</a> *g)</td></tr>
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<tr class="memitem:a7519b538b9ff2cff8c6bd09b44c2d50a"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1intersection_1_1RectangleIntersectionBuilder.html#a7519b538b9ff2cff8c6bd09b44c2d50a">add</a> (<a class="el" href="classgeos_1_1geom_1_1Point.html">geom::Point</a> *g)</td></tr>
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<tr class="memitem:a204c642c87709b20c705aee95471d872"><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1intersection_1_1RectangleIntersectionBuilder.html#a204c642c87709b20c705aee95471d872">empty</a> () const </td></tr>
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<tr class="memitem:a69d5735811622263bbb89fe195f96a18"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1intersection_1_1RectangleIntersectionBuilder.html#a69d5735811622263bbb89fe195f96a18">clear</a> ()</td></tr>
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<tr class="memitem:abd98ed6f36d52f230d353a4d87df418c"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1intersection_1_1RectangleIntersectionBuilder.html#abd98ed6f36d52f230d353a4d87df418c">close_boundary</a> (const <a class="el" href="classgeos_1_1operation_1_1intersection_1_1Rectangle.html">Rectangle</a> &rect, std::vector< <a class="el" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a> > *ring, double x1, double y1, double x2, double y2)</td></tr>
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<tr class="memdesc:abd98ed6f36d52f230d353a4d87df418c"><td class="mdescLeft"> </td><td class="mdescRight">Close a ring clockwise along rectangle edges. <a href="#abd98ed6f36d52f230d353a4d87df418c">More...</a><br /></td></tr>
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<tr class="memitem:a1245b31ef590a15c696b4b7e7fe8a9b3"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1intersection_1_1RectangleIntersectionBuilder.html#a1245b31ef590a15c696b4b7e7fe8a9b3">close_ring</a> (const <a class="el" href="classgeos_1_1operation_1_1intersection_1_1Rectangle.html">Rectangle</a> &rect, std::vector< <a class="el" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a> > *ring)</td></tr>
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<tr class="memitem:ac873005e873567f5ff590e8ebb6512c9"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1intersection_1_1RectangleIntersectionBuilder.html#ac873005e873567f5ff590e8ebb6512c9">RectangleIntersectionBuilder</a> (const <a class="el" href="classgeos_1_1geom_1_1GeometryFactory.html">geom::GeometryFactory</a> &f)</td></tr>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pri-attribs"></a>
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Private Attributes</h2></td></tr>
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<tr class="memitem:a3d9416ce3cab8eb643b24aeaeaf60d2a"><td class="memItemLeft" align="right" valign="top">std::list< <a class="el" href="classgeos_1_1geom_1_1Polygon.html">geom::Polygon</a> * > </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1intersection_1_1RectangleIntersectionBuilder.html#a3d9416ce3cab8eb643b24aeaeaf60d2a">polygons</a></td></tr>
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<tr class="separator:a3d9416ce3cab8eb643b24aeaeaf60d2a"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a1da9eb6640b683b7551d41f51193bdf6"><td class="memItemLeft" align="right" valign="top">std::list< <a class="el" href="classgeos_1_1geom_1_1LineString.html">geom::LineString</a> * > </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1intersection_1_1RectangleIntersectionBuilder.html#a1da9eb6640b683b7551d41f51193bdf6">lines</a></td></tr>
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<tr class="memitem:adf397d9d962e22bdb4cc55bf8cbcacf9"><td class="memItemLeft" align="right" valign="top">std::list< <a class="el" href="classgeos_1_1geom_1_1Point.html">geom::Point</a> * > </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1intersection_1_1RectangleIntersectionBuilder.html#adf397d9d962e22bdb4cc55bf8cbcacf9">points</a></td></tr>
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<tr class="memitem:a627a74327d39f7184017b28a382ac6fb"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="classgeos_1_1geom_1_1GeometryFactory.html">geom::GeometryFactory</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1intersection_1_1RectangleIntersectionBuilder.html#a627a74327d39f7184017b28a382ac6fb">_gf</a></td></tr>
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</table><table class="memberdecls">
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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:ad2b514c8884b03852eb0a609f0193c53"><td class="memItemLeft" align="right" valign="top">class </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1intersection_1_1RectangleIntersectionBuilder.html#ad2b514c8884b03852eb0a609f0193c53">RectangleIntersection</a></td></tr>
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</table>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
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<div class="textblock"><p>Rebuild geometries from subpaths left by clipping with a rectangle. </p>
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<p>The <a class="el" href="classgeos_1_1operation_1_1intersection_1_1RectangleIntersectionBuilder.html" title="Rebuild geometries from subpaths left by clipping with a rectangle. ">RectangleIntersectionBuilder</a> is used to maintain lists of polygons, linestrings and points left from clipping a <a class="el" href="classgeos_1_1geom_1_1Geometry.html" title="Basic implementation of Geometry, constructed and destructed by GeometryFactory. ">geom::Geometry</a> with a <a class="el" href="classgeos_1_1operation_1_1intersection_1_1Rectangle.html" title="Clipping rectangle. ">Rectangle</a>. Once all clipping has been done, the class builds a valid <a class="el" href="classgeos_1_1geom_1_1Geometry.html" title="Basic implementation of Geometry, constructed and destructed by GeometryFactory. ">geom::Geometry</a> from the components.</p>
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<dl class="section note"><dt>Note</dt><dd>This is a utility class needed by <a class="el" href="classgeos_1_1operation_1_1intersection_1_1RectangleIntersection.html" title="Speed-optimized clipping of a Geometry with a rectangle. ">RectangleIntersection</a>, and is not intended for public use. </dd></dl>
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<p>Definition at line <a class="el" href="RectangleIntersectionBuilder_8h_source.html#l00063">63</a> of file <a class="el" href="RectangleIntersectionBuilder_8h_source.html">RectangleIntersectionBuilder.h</a>.</p>
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</div><h2 class="groupheader">Constructor & Destructor Documentation</h2>
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<a class="anchor" id="acf3ea11d830fbd31abf5aa3c8b5b6178"></a>
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<td class="memname">geos::operation::intersection::RectangleIntersectionBuilder::~RectangleIntersectionBuilder </td>
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<td>(</td>
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<td class="paramname"></td><td>)</td>
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<td class="memname">geos::operation::intersection::RectangleIntersectionBuilder::RectangleIntersectionBuilder </td>
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<td>(</td>
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<td class="paramtype">const <a class="el" href="classgeos_1_1geom_1_1GeometryFactory.html">geom::GeometryFactory</a> & </td>
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<td class="paramname"><em>f</em></td><td>)</td>
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<p>Definition at line <a class="el" href="RectangleIntersectionBuilder_8h_source.html#l00149">149</a> of file <a class="el" href="RectangleIntersectionBuilder_8h_source.html">RectangleIntersectionBuilder.h</a>.</p>
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<h2 class="groupheader">Member Function Documentation</h2>
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<td class="memname">void geos::operation::intersection::RectangleIntersectionBuilder::add </td>
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<td>(</td>
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<td class="paramtype"><a class="el" href="classgeos_1_1geom_1_1Polygon.html">geom::Polygon</a> * </td>
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<td class="memname">void geos::operation::intersection::RectangleIntersectionBuilder::add </td>
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<td>(</td>
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<td class="memname">void geos::operation::intersection::RectangleIntersectionBuilder::add </td>
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<td>(</td>
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<td class="memname">std::unique_ptr<<a class="el" href="classgeos_1_1geom_1_1Geometry.html">geom::Geometry</a>> geos::operation::intersection::RectangleIntersectionBuilder::build </td>
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<p>Build the result geometry from partial results and clean up. </p>
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<p>Close a ring clockwise along rectangle edges. </p>
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<p>Only the 4 corners and x1,y1 need to be considered. The possible cases are:</p>
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<p>x1,y1 corner1 x1,y1 corner1 corner2 x1,y1 corner1 corner2 corner3 x1,y1 corner1 corner2 corner3 corner4 x1,y1 </p>
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<td class="memname">void geos::operation::intersection::RectangleIntersectionBuilder::close_ring </td>
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<td class="memname">void geos::operation::intersection::RectangleIntersectionBuilder::reconnect </td>
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<p>Reconnect disjointed parts</p>
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<p>When we clip a LinearRing we may get multiple linestrings. Often the first and last ones can be reconnected to simplify output.</p>
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<p>Sample clip with a rectangle 0,0 –> 10,10 without reconnecting:</p>
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<p>Input: POLYGON ((5 10,0 0,10 0,5 10)) Output: MULTILINESTRING ((5 10,0 0),(10 0,5 10)) Desired: LINESTRING (10 0,5 10,0 0)</p>
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<p>TODO: If there is a very sharp spike from inside the rectangle outside, and then back in, it is possible that the intersection points at the edge are equal. In this case we could reconnect the linestrings. The task is the same we're already doing for the 1st/last linestrings, we'd just do it for any adjacent pair as well. </p>
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<td class="memname">void geos::operation::intersection::RectangleIntersectionBuilder::reconnectPolygons </td>
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<p>Build polygons from parts left by clipping one. </p>
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<ol type="1">
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<li>Build exterior ring(s) from lines</li>
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<td class="memname">void geos::operation::intersection::RectangleIntersectionBuilder::release </td>
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<p>Export parts to another container </p>
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<td class="memname">void geos::operation::intersection::RectangleIntersectionBuilder::reverseLines </td>
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<h2 class="groupheader">Friends And Related Function Documentation</h2>
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<td class="memname">friend class <a class="el" href="classgeos_1_1operation_1_1intersection_1_1RectangleIntersection.html">RectangleIntersection</a></td>
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<p>Definition at line <a class="el" href="RectangleIntersectionBuilder_8h_source.html#l00065">65</a> of file <a class="el" href="RectangleIntersectionBuilder_8h_source.html">RectangleIntersectionBuilder.h</a>.</p>
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<h2 class="groupheader">Member Data Documentation</h2>
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<td class="memname">const <a class="el" href="classgeos_1_1geom_1_1GeometryFactory.html">geom::GeometryFactory</a>& geos::operation::intersection::RectangleIntersectionBuilder::_gf</td>
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<p>Definition at line <a class="el" href="RectangleIntersectionBuilder_8h_source.html#l00152">152</a> of file <a class="el" href="RectangleIntersectionBuilder_8h_source.html">RectangleIntersectionBuilder.h</a>.</p>
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<td class="memname">std::list<<a class="el" href="classgeos_1_1geom_1_1LineString.html">geom::LineString</a>*> geos::operation::intersection::RectangleIntersectionBuilder::lines</td>
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<p>Definition at line <a class="el" href="RectangleIntersectionBuilder_8h_source.html#l00126">126</a> of file <a class="el" href="RectangleIntersectionBuilder_8h_source.html">RectangleIntersectionBuilder.h</a>.</p>
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<td class="memname">std::list<<a class="el" href="classgeos_1_1geom_1_1Point.html">geom::Point</a>*> geos::operation::intersection::RectangleIntersectionBuilder::points</td>
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<p>Definition at line <a class="el" href="RectangleIntersectionBuilder_8h_source.html#l00127">127</a> of file <a class="el" href="RectangleIntersectionBuilder_8h_source.html">RectangleIntersectionBuilder.h</a>.</p>
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<td class="memname">std::list<<a class="el" href="classgeos_1_1geom_1_1Polygon.html">geom::Polygon</a>*> geos::operation::intersection::RectangleIntersectionBuilder::polygons</td>
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<p>Definition at line <a class="el" href="RectangleIntersectionBuilder_8h_source.html#l00125">125</a> of file <a class="el" href="RectangleIntersectionBuilder_8h_source.html">RectangleIntersectionBuilder.h</a>.</p>
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<hr/>The documentation for this class was generated from the following file:<ul>
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