399 lines
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399 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_1noding.html">noding</a></li><li class="navelem"><a class="el" href="namespacegeos_1_1noding_1_1snapround.html">snapround</a></li><li class="navelem"><a class="el" href="classgeos_1_1noding_1_1snapround_1_1SnapRoundingIntersectionAdder.html">SnapRoundingIntersectionAdder</a></li> </ul>
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<div class="title">geos::noding::snapround::SnapRoundingIntersectionAdder Class Reference</div> </div>
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<p><code>#include <<a class="el" href="SnapRoundingIntersectionAdder_8h_source.html">SnapRoundingIntersectionAdder.h</a>></code></p>
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Inheritance diagram for geos::noding::snapround::SnapRoundingIntersectionAdder:</div>
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Collaboration diagram for geos::noding::snapround::SnapRoundingIntersectionAdder:</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:a86b29c45e0a31a9debccf1ea3b964fdf"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1noding_1_1snapround_1_1SnapRoundingIntersectionAdder.html#a86b29c45e0a31a9debccf1ea3b964fdf">SnapRoundingIntersectionAdder</a> (const <a class="el" href="classgeos_1_1geom_1_1PrecisionModel.html">geom::PrecisionModel</a> *newPm)</td></tr>
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<tr class="separator:a86b29c45e0a31a9debccf1ea3b964fdf"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a3b0d84f8e0188d0f8ff816fcd188bef5"><td class="memItemLeft" align="right" valign="top">std::unique_ptr< std::vector< <a class="el" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a> > > </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1noding_1_1snapround_1_1SnapRoundingIntersectionAdder.html#a3b0d84f8e0188d0f8ff816fcd188bef5">getIntersections</a> ()</td></tr>
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<tr class="separator:a3b0d84f8e0188d0f8ff816fcd188bef5"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:abe71f1c3b90735618af19808d8715116"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1noding_1_1snapround_1_1SnapRoundingIntersectionAdder.html#abe71f1c3b90735618af19808d8715116">processIntersections</a> (<a class="el" href="classgeos_1_1noding_1_1SegmentString.html">SegmentString</a> *e0, size_t segIndex0, <a class="el" href="classgeos_1_1noding_1_1SegmentString.html">SegmentString</a> *e1, size_t segIndex1) override</td></tr>
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<tr class="separator:abe71f1c3b90735618af19808d8715116"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a46913b592e89d6c6693ff0105c6250d2"><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1noding_1_1snapround_1_1SnapRoundingIntersectionAdder.html#a46913b592e89d6c6693ff0105c6250d2">isDone</a> () const override</td></tr>
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<tr class="separator:a46913b592e89d6c6693ff0105c6250d2"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="inherit_header pub_methods_classgeos_1_1noding_1_1SegmentIntersector"><td colspan="2" onclick="javascript:toggleInherit('pub_methods_classgeos_1_1noding_1_1SegmentIntersector')"><img src="closed.png" alt="-"/> Public Member Functions inherited from <a class="el" href="classgeos_1_1noding_1_1SegmentIntersector.html">geos::noding::SegmentIntersector</a></td></tr>
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<tr class="memitem:abaed578d309e9cc6816f532a12e6019e inherit pub_methods_classgeos_1_1noding_1_1SegmentIntersector"><td class="memItemLeft" align="right" valign="top">virtual </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1noding_1_1SegmentIntersector.html#abaed578d309e9cc6816f532a12e6019e">~SegmentIntersector</a> ()</td></tr>
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<tr class="separator:abaed578d309e9cc6816f532a12e6019e inherit pub_methods_classgeos_1_1noding_1_1SegmentIntersector"><td class="memSeparator" colspan="2"> </td></tr>
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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:a02bc62c4f96397d01355f41024ae786d"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1noding_1_1snapround_1_1SnapRoundingIntersectionAdder.html#a02bc62c4f96397d01355f41024ae786d">processNearVertex</a> (const <a class="el" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a> &p, <a class="el" href="classgeos_1_1noding_1_1SegmentString.html">SegmentString</a> *edge, size_t segIndex, const <a class="el" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a> &p0, const <a class="el" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a> &p1)</td></tr>
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Private Attributes</h2></td></tr>
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<tr class="memitem:a693dfb91bd54d0f522375e4540fa1b11"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classgeos_1_1algorithm_1_1LineIntersector.html">algorithm::LineIntersector</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1noding_1_1snapround_1_1SnapRoundingIntersectionAdder.html#a693dfb91bd54d0f522375e4540fa1b11">li</a></td></tr>
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<tr class="memitem:a283fa08ee9894d2eee36c74dd4a1f0bb"><td class="memItemLeft" align="right" valign="top">std::unique_ptr< std::vector< <a class="el" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a> > > </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1noding_1_1snapround_1_1SnapRoundingIntersectionAdder.html#a283fa08ee9894d2eee36c74dd4a1f0bb">intersections</a></td></tr>
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<tr class="memitem:af9df99a17b5d8ced9cb90a6d033b3f3e"><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1noding_1_1snapround_1_1SnapRoundingIntersectionAdder.html#af9df99a17b5d8ced9cb90a6d033b3f3e">nearnessTol</a></td></tr>
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Static Private Attributes</h2></td></tr>
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<tr class="memitem:a6698f3a1ad24c3c96aeba0b63371d6bf"><td class="memItemLeft" align="right" valign="top">static constexpr int </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1noding_1_1snapround_1_1SnapRoundingIntersectionAdder.html#a6698f3a1ad24c3c96aeba0b63371d6bf">NEARNESS_FACTOR</a> = 100</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="inherited"></a>
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Additional Inherited Members</h2></td></tr>
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<tr class="inherit_header pro_methods_classgeos_1_1noding_1_1SegmentIntersector"><td colspan="2" onclick="javascript:toggleInherit('pro_methods_classgeos_1_1noding_1_1SegmentIntersector')"><img src="closed.png" alt="-"/> Protected Member Functions inherited from <a class="el" href="classgeos_1_1noding_1_1SegmentIntersector.html">geos::noding::SegmentIntersector</a></td></tr>
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<tr class="memitem:aad5d64d5214d60e5e867379dc7d9c9ea inherit pro_methods_classgeos_1_1noding_1_1SegmentIntersector"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1noding_1_1SegmentIntersector.html#aad5d64d5214d60e5e867379dc7d9c9ea">SegmentIntersector</a> ()</td></tr>
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<tr class="separator:aad5d64d5214d60e5e867379dc7d9c9ea inherit pro_methods_classgeos_1_1noding_1_1SegmentIntersector"><td class="memSeparator" colspan="2"> </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>Finds intersections between line segments which will be snap-rounded, and adds them as nodes to the segments.</p>
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<p>Intersections are detected and computed using full precision. Snapping takes place in a subsequent phase.</p>
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<p>The intersection points are recorded, so that HotPixels can be created for them.</p>
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<p>To avoid robustness issues with vertices which lie very close to line segments a heuristic is used: nodes are created if a vertex lies within a tolerance distance of the interior of a segment. The tolerance distance is chosen to be significantly below the snap-rounding grid size. This has empirically proven to eliminate noding failures. </p>
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<p>Definition at line <a class="el" href="SnapRoundingIntersectionAdder_8h_source.html#l00065">65</a> of file <a class="el" href="SnapRoundingIntersectionAdder_8h_source.html">SnapRoundingIntersectionAdder.h</a>.</p>
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</div><h2 class="groupheader">Constructor & Destructor Documentation</h2>
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<td class="memname">geos::noding::snapround::SnapRoundingIntersectionAdder::SnapRoundingIntersectionAdder </td>
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<td>(</td>
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<td class="paramtype">const <a class="el" href="classgeos_1_1geom_1_1PrecisionModel.html">geom::PrecisionModel</a> * </td>
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<td class="paramname"><em>newPm</em></td><td>)</td>
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<h2 class="groupheader">Member Function Documentation</h2>
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<td class="memname">std::unique_ptr<std::vector<<a class="el" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>> > geos::noding::snapround::SnapRoundingIntersectionAdder::getIntersections </td>
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<p>Definition at line <a class="el" href="SnapRoundingIntersectionAdder_8h_source.html#l00100">100</a> of file <a class="el" href="SnapRoundingIntersectionAdder_8h_source.html">SnapRoundingIntersectionAdder.h</a>.</p>
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<td class="memname">bool geos::noding::snapround::SnapRoundingIntersectionAdder::isDone </td>
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<td> const</td>
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<p>Always process all intersections </p>
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<p>Reimplemented from <a class="el" href="classgeos_1_1noding_1_1SegmentIntersector.html#a2402e2ce3a39edad9f5d283be73b5d1d">geos::noding::SegmentIntersector</a>.</p>
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<p>Definition at line <a class="el" href="SnapRoundingIntersectionAdder_8h_source.html#l00116">116</a> of file <a class="el" href="SnapRoundingIntersectionAdder_8h_source.html">SnapRoundingIntersectionAdder.h</a>.</p>
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<td class="memname">void geos::noding::snapround::SnapRoundingIntersectionAdder::processIntersections </td>
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<td>(</td>
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<td class="paramtype"><a class="el" href="classgeos_1_1noding_1_1SegmentString.html">SegmentString</a> * </td>
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<td class="paramname"><em>e0</em>, </td>
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<td class="paramtype">size_t </td>
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<td class="paramtype"><a class="el" href="classgeos_1_1noding_1_1SegmentString.html">SegmentString</a> * </td>
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<p>This method is called by clients of the <a class="el" href="classgeos_1_1noding_1_1SegmentIntersector.html">SegmentIntersector</a> class to process intersections for two segments of the <a class="el" href="classgeos_1_1noding_1_1SegmentString.html">SegmentString</a>s being intersected. Note that some clients (such as MonotoneChains) may optimize away this call for segment pairs which they have determined do not intersect (e.g. by an disjoint envelope test). </p>
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<p>Implements <a class="el" href="classgeos_1_1noding_1_1SegmentIntersector.html#ab37c13c8ccf0a75ad60df76fab4e4175">geos::noding::SegmentIntersector</a>.</p>
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<td class="memname">void geos::noding::snapround::SnapRoundingIntersectionAdder::processNearVertex </td>
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<td>)</td>
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<p>If an endpoint of one segment is near the interior of the other segment, add it as an intersection. EXCEPT if the endpoint is also close to a segment endpoint (since this can introduce "zigs" in the linework).</p>
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<p>This resolves situations where a segment A endpoint is extremely close to another segment B, but is not quite crossing. Due to robustness issues in orientation detection, this can result in the snapped segment A crossing segment B without a node being introduced. </p>
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<h2 class="groupheader">Member Data Documentation</h2>
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<td class="memname">std::unique_ptr<std::vector<<a class="el" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>> > geos::noding::snapround::SnapRoundingIntersectionAdder::intersections</td>
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<p>Definition at line <a class="el" href="SnapRoundingIntersectionAdder_8h_source.html#l00075">75</a> of file <a class="el" href="SnapRoundingIntersectionAdder_8h_source.html">SnapRoundingIntersectionAdder.h</a>.</p>
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<td class="memname"><a class="el" href="classgeos_1_1algorithm_1_1LineIntersector.html">algorithm::LineIntersector</a> geos::noding::snapround::SnapRoundingIntersectionAdder::li</td>
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<p>Definition at line <a class="el" href="SnapRoundingIntersectionAdder_8h_source.html#l00074">74</a> of file <a class="el" href="SnapRoundingIntersectionAdder_8h_source.html">SnapRoundingIntersectionAdder.h</a>.</p>
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<td class="memname">constexpr int geos::noding::snapround::SnapRoundingIntersectionAdder::NEARNESS_FACTOR = 100</td>
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<p>The division factor used to determine nearness distance tolerance for interior intersection detection. </p>
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<p>Definition at line <a class="el" href="SnapRoundingIntersectionAdder_8h_source.html#l00072">72</a> of file <a class="el" href="SnapRoundingIntersectionAdder_8h_source.html">SnapRoundingIntersectionAdder.h</a>.</p>
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<td class="memname">double geos::noding::snapround::SnapRoundingIntersectionAdder::nearnessTol</td>
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<p>Definition at line <a class="el" href="SnapRoundingIntersectionAdder_8h_source.html#l00077">77</a> of file <a class="el" href="SnapRoundingIntersectionAdder_8h_source.html">SnapRoundingIntersectionAdder.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="SnapRoundingIntersectionAdder_8h_source.html">SnapRoundingIntersectionAdder.h</a></li>
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