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<p><code>#include &lt;<a class="el" href="g_2LineBuilder_8h_source.html">LineBuilder.h</a>&gt;</code></p>
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Collaboration diagram for geos::operation::overlayng::LineBuilder:</div>
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Public Member Functions</h2></td></tr>
<tr class="memitem:a63c65c893ff29f6efc79ac066bae807d"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1overlayng_1_1LineBuilder.html#a63c65c893ff29f6efc79ac066bae807d">LineBuilder</a> (const <a class="el" href="classgeos_1_1operation_1_1overlayng_1_1InputGeometry.html">InputGeometry</a> *inputGeom, <a class="el" href="classgeos_1_1operation_1_1overlayng_1_1OverlayGraph.html">OverlayGraph</a> *p_graph, bool p_hasResultArea, int p_opCode, const <a class="el" href="classgeos_1_1geom_1_1GeometryFactory.html">geom::GeometryFactory</a> *geomFact)</td></tr>
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<tr class="memitem:aff0f53ad60ce73fa86953e9c1ca1d1b0"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1overlayng_1_1LineBuilder.html#aff0f53ad60ce73fa86953e9c1ca1d1b0">LineBuilder</a> (const <a class="el" href="classgeos_1_1operation_1_1overlayng_1_1LineBuilder.html">LineBuilder</a> &amp;)=delete</td></tr>
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<tr class="memitem:a8b6c43e0c89acd51a32f8c82781fadcd"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classgeos_1_1operation_1_1overlayng_1_1LineBuilder.html">LineBuilder</a> &amp;&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1overlayng_1_1LineBuilder.html#a8b6c43e0c89acd51a32f8c82781fadcd">operator=</a> (const <a class="el" href="classgeos_1_1operation_1_1overlayng_1_1LineBuilder.html">LineBuilder</a> &amp;)=delete</td></tr>
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<tr class="memitem:a767cc14f8dd0563d5c6c9b455b0fd667"><td class="memItemLeft" align="right" valign="top">std::vector&lt; std::unique_ptr&lt; <a class="el" href="classgeos_1_1geom_1_1LineString.html">geom::LineString</a> &gt; &gt;&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1overlayng_1_1LineBuilder.html#a767cc14f8dd0563d5c6c9b455b0fd667">getLines</a> ()</td></tr>
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<tr class="memitem:a474baef8804f588e4c4ac92594bef552"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1overlayng_1_1LineBuilder.html#a474baef8804f588e4c4ac92594bef552">setStrictMode</a> (bool p_isStrictResultMode)</td></tr>
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Private Member Functions</h2></td></tr>
<tr class="memitem:a822a2e18cbc8c3d1420e6bd7934763f8"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1overlayng_1_1LineBuilder.html#a822a2e18cbc8c3d1420e6bd7934763f8">markResultLines</a> ()</td></tr>
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<tr class="memitem:ab087d268eba844c285fdebe71a7a06cf"><td class="memItemLeft" align="right" valign="top"><a class="el" href="namespacegeos_1_1geom.html#ae55a225cd843a6b153a7b6ca5a4707c8">geom::Location</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1overlayng_1_1LineBuilder.html#ab087d268eba844c285fdebe71a7a06cf">effectiveLocation</a> (const <a class="el" href="classgeos_1_1operation_1_1overlayng_1_1OverlayLabel.html">OverlayLabel</a> *lbl, int geomIndex) const </td></tr>
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<tr class="memitem:a55555de08dec7f268d1367e0cc98765d"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1overlayng_1_1LineBuilder.html#a55555de08dec7f268d1367e0cc98765d">addResultLines</a> ()</td></tr>
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<tr class="memitem:ab4c413f6489a4323694815879c175db3"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1overlayng_1_1LineBuilder.html#ab4c413f6489a4323694815879c175db3">addResultLinesMerged</a> ()</td></tr>
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<tr class="memitem:aa83f58dc5394194b9e36b5ef577964db"><td class="memItemLeft" align="right" valign="top">std::unique_ptr&lt; <a class="el" href="classgeos_1_1geom_1_1LineString.html">geom::LineString</a> &gt;&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1overlayng_1_1LineBuilder.html#aa83f58dc5394194b9e36b5ef577964db">toLine</a> (<a class="el" href="classgeos_1_1operation_1_1overlayng_1_1OverlayEdge.html">OverlayEdge</a> *edge)</td></tr>
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<tr class="memitem:a34ed900d11b73ed93de8baab45953e97"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1overlayng_1_1LineBuilder.html#a34ed900d11b73ed93de8baab45953e97">addResultLinesForNodes</a> ()</td></tr>
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<tr class="memitem:a4509819cf86bc038283db02f804a4386"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1overlayng_1_1LineBuilder.html#a4509819cf86bc038283db02f804a4386">addResultLinesRings</a> ()</td></tr>
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<tr class="memitem:acf46da8dd904aab10ab0e6b95c27ce78"><td class="memItemLeft" align="right" valign="top">std::unique_ptr&lt; <a class="el" href="classgeos_1_1geom_1_1LineString.html">geom::LineString</a> &gt;&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1overlayng_1_1LineBuilder.html#acf46da8dd904aab10ab0e6b95c27ce78">buildLine</a> (<a class="el" href="classgeos_1_1operation_1_1overlayng_1_1OverlayEdge.html">OverlayEdge</a> *node)</td></tr>
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<tr class="memitem:ae3fee0a79be9f82d60eb2131aac18b12"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classgeos_1_1operation_1_1overlayng_1_1OverlayEdge.html">OverlayEdge</a> *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1overlayng_1_1LineBuilder.html#ae3fee0a79be9f82d60eb2131aac18b12">nextLineEdgeUnvisited</a> (<a class="el" href="classgeos_1_1operation_1_1overlayng_1_1OverlayEdge.html">OverlayEdge</a> *node) const </td></tr>
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<tr class="memitem:a98c93e77ef0b6384e31627273b345dee"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1overlayng_1_1LineBuilder.html#a98c93e77ef0b6384e31627273b345dee">degreeOfLines</a> (<a class="el" href="classgeos_1_1operation_1_1overlayng_1_1OverlayEdge.html">OverlayEdge</a> *node) const </td></tr>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pri-attribs"></a>
Private Attributes</h2></td></tr>
<tr class="memitem:a975c961663c3b1d35d766ce2607812e3"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classgeos_1_1operation_1_1overlayng_1_1OverlayGraph.html">OverlayGraph</a> *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1overlayng_1_1LineBuilder.html#a975c961663c3b1d35d766ce2607812e3">graph</a></td></tr>
<tr class="separator:a975c961663c3b1d35d766ce2607812e3"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a30bbb13235ed7c920d30a9e006a139a5"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1overlayng_1_1LineBuilder.html#a30bbb13235ed7c920d30a9e006a139a5">opCode</a></td></tr>
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<tr class="memitem:aab82b70e72894f086eea75c36f56e7e4"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="classgeos_1_1geom_1_1GeometryFactory.html">geom::GeometryFactory</a> *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1overlayng_1_1LineBuilder.html#aab82b70e72894f086eea75c36f56e7e4">geometryFactory</a></td></tr>
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<tr class="memitem:a1169b936e665421a99bafebdd54e0934"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1overlayng_1_1LineBuilder.html#a1169b936e665421a99bafebdd54e0934">hasResultArea</a></td></tr>
<tr class="separator:a1169b936e665421a99bafebdd54e0934"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a9d46a2891085bebe5902fc431aace984"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1overlayng_1_1LineBuilder.html#a9d46a2891085bebe5902fc431aace984">inputAreaIndex</a></td></tr>
<tr class="separator:a9d46a2891085bebe5902fc431aace984"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a4c8a4794ff675ba57f3b4faef0805668"><td class="memItemLeft" align="right" valign="top">std::vector&lt; std::unique_ptr&lt; <a class="el" href="classgeos_1_1geom_1_1LineString.html">geom::LineString</a> &gt; &gt;&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1overlayng_1_1LineBuilder.html#a4c8a4794ff675ba57f3b4faef0805668">lines</a></td></tr>
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<tr class="memitem:ab8ed9ea3378ed1c58c95193ec9ff0c8f"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1overlayng_1_1LineBuilder.html#ab8ed9ea3378ed1c58c95193ec9ff0c8f">isAllowMixedResult</a> = ! <a class="el" href="classgeos_1_1operation_1_1overlayng_1_1OverlayNG.html#acd97de26f1e416ead4c73073977c5a6b">OverlayNG::STRICT_MODE_DEFAULT</a></td></tr>
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<tr class="memitem:a577594fe0ed835532713720037e8d7db"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1overlayng_1_1LineBuilder.html#a577594fe0ed835532713720037e8d7db">isAllowCollapseLines</a> = ! <a class="el" href="classgeos_1_1operation_1_1overlayng_1_1OverlayNG.html#acd97de26f1e416ead4c73073977c5a6b">OverlayNG::STRICT_MODE_DEFAULT</a></td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>Finds and builds overlay result lines from the overlay graph. Output linework has the following semantics:</p>
<ul>
<li>Linework is fully noded</li>
<li>Lines are as long as possible between nodes</li>
</ul>
<p>Various strategies are possible for how to merge graph edges into lines. This implementation uses the approach of having output lines run contiguously from node to node. For rings a node point is chosen arbitrarily.</p>
<p>Another possible strategy would be to preserve input linework as far as possible (i.e. any sections of input lines which are not coincident with other linework would be preserved).</p>
<p>It would also be possible to output LinearRings, if the input is a LinearRing and is unchanged. This will require additional info from the input linework.</p>
<dl class="section author"><dt>Author</dt><dd>Martin Davis </dd></dl>
<p>Definition at line <a class="el" href="g_2LineBuilder_8h_source.html#l00070">70</a> of file <a class="el" href="g_2LineBuilder_8h_source.html">g/LineBuilder.h</a>.</p>
</div><h2 class="groupheader">Constructor &amp; Destructor Documentation</h2>
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<td class="paramtype">const <a class="el" href="classgeos_1_1operation_1_1overlayng_1_1InputGeometry.html">InputGeometry</a> *&#160;</td>
<td class="paramname"><em>inputGeom</em>, </td>
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<td class="paramtype"><a class="el" href="classgeos_1_1operation_1_1overlayng_1_1OverlayGraph.html">OverlayGraph</a> *&#160;</td>
<td class="paramname"><em>p_graph</em>, </td>
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<td class="paramname"><em>p_hasResultArea</em>, </td>
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<td class="paramtype">const <a class="el" href="classgeos_1_1geom_1_1GeometryFactory.html">geom::GeometryFactory</a> *&#160;</td>
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<p>Definition at line <a class="el" href="g_2LineBuilder_8h_source.html#l00163">163</a> of file <a class="el" href="g_2LineBuilder_8h_source.html">g/LineBuilder.h</a>.</p>
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<td class="memname">geos::operation::overlayng::LineBuilder::LineBuilder </td>
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<td class="paramtype">const <a class="el" href="classgeos_1_1operation_1_1overlayng_1_1LineBuilder.html">LineBuilder</a> &amp;&#160;</td>
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<h2 class="groupheader">Member Function Documentation</h2>
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<td class="memname">void geos::operation::overlayng::LineBuilder::addResultLines </td>
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<td class="memname">void geos::operation::overlayng::LineBuilder::addResultLinesForNodes </td>
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<p>Adds lines which form rings (i.e. have only degree-2 vertices). </p>
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<td class="memname">std::unique_ptr&lt;<a class="el" href="classgeos_1_1geom_1_1LineString.html">geom::LineString</a>&gt; geos::operation::overlayng::LineBuilder::buildLine </td>
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<p>Traverses edges from edgeStart which lie in a single line (have degree = 2).</p>
<p>The direction of the linework is preserved as far as possible. Specifically, the direction of the line is determined by the start edge direction. This implies that if all edges are reversed, the created line will be reversed to match. (Other more complex strategies would be possible. E.g. using the direction of the majority of segments, or preferring the direction of the A edges.) </p>
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<p>Computes the degree of the line edges incident on a node </p>
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<td class="memname"><a class="el" href="namespacegeos_1_1geom.html#ae55a225cd843a6b153a7b6ca5a4707c8">geom::Location</a> geos::operation::overlayng::LineBuilder::effectiveLocation </td>
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<p>Determines the effective location for a line, for the purpose of overlay operation evaluation. Line edges and Collapses are reported as INTERIOR so they may be included in the result if warranted by the effect of the operation on the two edges. (For instance, the intersection of line edge and a collapsed boundary is included in the result). </p>
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<p>Checks if the topology indicated by an edge label determines that this edge should be part of a result line.</p>
<p>Note that the logic here relies on the semantic that for intersection lines are only returned if there is no result area components. </p>
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<td class="memname"><a class="el" href="classgeos_1_1operation_1_1overlayng_1_1OverlayEdge.html">OverlayEdge</a>* geos::operation::overlayng::LineBuilder::nextLineEdgeUnvisited </td>
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<td class="memname"><a class="el" href="classgeos_1_1operation_1_1overlayng_1_1LineBuilder.html">LineBuilder</a>&amp; geos::operation::overlayng::LineBuilder::operator= </td>
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<td class="memname">void geos::operation::overlayng::LineBuilder::setStrictMode </td>
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<p>Definition at line <a class="el" href="g_2LineBuilder_8h_source.html#l00178">178</a> of file <a class="el" href="g_2LineBuilder_8h_source.html">g/LineBuilder.h</a>.</p>
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<td class="memname">std::unique_ptr&lt;<a class="el" href="classgeos_1_1geom_1_1LineString.html">geom::LineString</a>&gt; geos::operation::overlayng::LineBuilder::toLine </td>
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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::overlayng::LineBuilder::geometryFactory</td>
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<p>Definition at line <a class="el" href="g_2LineBuilder_8h_source.html#l00077">77</a> of file <a class="el" href="g_2LineBuilder_8h_source.html">g/LineBuilder.h</a>.</p>
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<td class="memname"><a class="el" href="classgeos_1_1operation_1_1overlayng_1_1OverlayGraph.html">OverlayGraph</a>* geos::operation::overlayng::LineBuilder::graph</td>
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<p>Definition at line <a class="el" href="g_2LineBuilder_8h_source.html#l00075">75</a> of file <a class="el" href="g_2LineBuilder_8h_source.html">g/LineBuilder.h</a>.</p>
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<p>Definition at line <a class="el" href="g_2LineBuilder_8h_source.html#l00078">78</a> of file <a class="el" href="g_2LineBuilder_8h_source.html">g/LineBuilder.h</a>.</p>
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<p>Definition at line <a class="el" href="g_2LineBuilder_8h_source.html#l00079">79</a> of file <a class="el" href="g_2LineBuilder_8h_source.html">g/LineBuilder.h</a>.</p>
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<td class="memname">bool geos::operation::overlayng::LineBuilder::isAllowCollapseLines = ! <a class="el" href="classgeos_1_1operation_1_1overlayng_1_1OverlayNG.html#acd97de26f1e416ead4c73073977c5a6b">OverlayNG::STRICT_MODE_DEFAULT</a></td>
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<p>Allow lines created by area topology collapses to appear in the result. True provides the original JTS semantics. </p>
<p>Definition at line <a class="el" href="g_2LineBuilder_8h_source.html#l00095">95</a> of file <a class="el" href="g_2LineBuilder_8h_source.html">g/LineBuilder.h</a>.</p>
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<td class="memname">bool geos::operation::overlayng::LineBuilder::isAllowMixedResult = ! <a class="el" href="classgeos_1_1operation_1_1overlayng_1_1OverlayNG.html#acd97de26f1e416ead4c73073977c5a6b">OverlayNG::STRICT_MODE_DEFAULT</a></td>
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<p>Indicates whether intersections are allowed to produce heterogeneous results including proper boundary touches. This does not control inclusion of touches along collapses. True provides the original JTS semantics. </p>
<p>Definition at line <a class="el" href="g_2LineBuilder_8h_source.html#l00088">88</a> of file <a class="el" href="g_2LineBuilder_8h_source.html">g/LineBuilder.h</a>.</p>
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<td class="memname">std::vector&lt;std::unique_ptr&lt;<a class="el" href="classgeos_1_1geom_1_1LineString.html">geom::LineString</a>&gt; &gt; geos::operation::overlayng::LineBuilder::lines</td>
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<p>Definition at line <a class="el" href="g_2LineBuilder_8h_source.html#l00080">80</a> of file <a class="el" href="g_2LineBuilder_8h_source.html">g/LineBuilder.h</a>.</p>
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<p>Definition at line <a class="el" href="g_2LineBuilder_8h_source.html#l00076">76</a> of file <a class="el" href="g_2LineBuilder_8h_source.html">g/LineBuilder.h</a>.</p>
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<hr/>The documentation for this class was generated from the following file:<ul>
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