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https://github.com/qgis/QGIS.git
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[FEATURE][processing] New algorithm to force right hand rule for polygons
This algorithm forces polygon geometries to respect the Right-Hand-Rule, in which the area that is bounded by a polygon is to the right of the boundary. In particular, the exterior ring is oriented in a clockwise direction and the interior rings in a counter-clockwise direction.
This commit is contained in:
Nyall Dawson
parent
1b79b9a140
commit
d1e09a2bc7
45
python/plugins/processing/tests/testdata/expected/force_rhr_multipolys.gml
vendored
Normal file
45
python/plugins/processing/tests/testdata/expected/force_rhr_multipolys.gml
vendored
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@ -0,0 +1,45 @@
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<?xml version="1.0" encoding="utf-8" ?>
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<ogr:FeatureCollection
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://ogr.maptools.org/ force_rhr_multipolys.xsd"
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xmlns:ogr="http://ogr.maptools.org/"
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xmlns:gml="http://www.opengis.net/gml">
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<gml:boundedBy>
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<gml:Box>
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<gml:coord><gml:X>0</gml:X><gml:Y>-1</gml:Y></gml:coord>
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<gml:coord><gml:X>9</gml:X><gml:Y>6</gml:Y></gml:coord>
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</gml:Box>
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</gml:boundedBy>
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<gml:featureMember>
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<ogr:force_rhr_multipolys fid="multipolys.0">
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<ogr:geometryProperty><gml:MultiPolygon srsName="EPSG:4326"><gml:polygonMember><gml:Polygon><gml:outerBoundaryIs><gml:LinearRing><gml:coordinates>2,1 2,2 3,2 3,3 4,3 4,1 2,1</gml:coordinates></gml:LinearRing></gml:outerBoundaryIs></gml:Polygon></gml:polygonMember></gml:MultiPolygon></ogr:geometryProperty>
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<ogr:Bname>Test</ogr:Bname>
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<ogr:Bintval>1</ogr:Bintval>
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<ogr:Bfloatval>0.123</ogr:Bfloatval>
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</ogr:force_rhr_multipolys>
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</gml:featureMember>
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<gml:featureMember>
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<ogr:force_rhr_multipolys fid="multipolys.1">
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<ogr:geometryProperty><gml:MultiPolygon srsName="EPSG:4326"><gml:polygonMember><gml:Polygon><gml:outerBoundaryIs><gml:LinearRing><gml:coordinates>7,-1 7,3 8,3 8,-1 7,-1</gml:coordinates></gml:LinearRing></gml:outerBoundaryIs></gml:Polygon></gml:polygonMember><gml:polygonMember><gml:Polygon><gml:outerBoundaryIs><gml:LinearRing><gml:coordinates>7,6 9,6 9,5 8,4 7,4 7,5 7,6</gml:coordinates></gml:LinearRing></gml:outerBoundaryIs></gml:Polygon></gml:polygonMember></gml:MultiPolygon></ogr:geometryProperty>
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<ogr:Bname xsi:nil="true"/>
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<ogr:Bintval xsi:nil="true"/>
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<ogr:Bfloatval xsi:nil="true"/>
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</ogr:force_rhr_multipolys>
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</gml:featureMember>
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<gml:featureMember>
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<ogr:force_rhr_multipolys fid="multipolys.2">
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<ogr:geometryProperty><gml:MultiPolygon srsName="EPSG:4326"><gml:polygonMember><gml:Polygon><gml:outerBoundaryIs><gml:LinearRing><gml:coordinates>0,0 0,1 1,1 1,0 0,0</gml:coordinates></gml:LinearRing></gml:outerBoundaryIs></gml:Polygon></gml:polygonMember></gml:MultiPolygon></ogr:geometryProperty>
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<ogr:Bname>Test</ogr:Bname>
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<ogr:Bintval>2</ogr:Bintval>
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<ogr:Bfloatval>-0.123</ogr:Bfloatval>
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</ogr:force_rhr_multipolys>
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</gml:featureMember>
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<gml:featureMember>
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<ogr:force_rhr_multipolys fid="multipolys.3">
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<ogr:Bname>Test</ogr:Bname>
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<ogr:Bintval>3</ogr:Bintval>
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<ogr:Bfloatval>0</ogr:Bfloatval>
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</ogr:force_rhr_multipolys>
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</gml:featureMember>
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</ogr:FeatureCollection>
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43
python/plugins/processing/tests/testdata/expected/force_rhr_multipolys.xsd
vendored
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43
python/plugins/processing/tests/testdata/expected/force_rhr_multipolys.xsd
vendored
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@ -0,0 +1,43 @@
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<?xml version="1.0" encoding="UTF-8"?>
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<xs:schema targetNamespace="http://ogr.maptools.org/" xmlns:ogr="http://ogr.maptools.org/" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:gml="http://www.opengis.net/gml" elementFormDefault="qualified" version="1.0">
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<xs:import namespace="http://www.opengis.net/gml" schemaLocation="http://schemas.opengis.net/gml/2.1.2/feature.xsd"/>
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<xs:element name="FeatureCollection" type="ogr:FeatureCollectionType" substitutionGroup="gml:_FeatureCollection"/>
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<xs:complexType name="FeatureCollectionType">
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<xs:complexContent>
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<xs:extension base="gml:AbstractFeatureCollectionType">
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<xs:attribute name="lockId" type="xs:string" use="optional"/>
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<xs:attribute name="scope" type="xs:string" use="optional"/>
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</xs:extension>
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</xs:complexContent>
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</xs:complexType>
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<xs:element name="force_rhr_multipolys" type="ogr:force_rhr_multipolys_Type" substitutionGroup="gml:_Feature"/>
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<xs:complexType name="force_rhr_multipolys_Type">
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<xs:complexContent>
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<xs:extension base="gml:AbstractFeatureType">
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<xs:sequence>
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<xs:element name="geometryProperty" type="gml:MultiPolygonPropertyType" nillable="true" minOccurs="0" maxOccurs="1"/>
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<xs:element name="Bname" nillable="true" minOccurs="0" maxOccurs="1">
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<xs:simpleType>
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<xs:restriction base="xs:string">
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<xs:maxLength value="4"/>
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</xs:restriction>
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</xs:simpleType>
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</xs:element>
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<xs:element name="Bintval" nillable="true" minOccurs="0" maxOccurs="1">
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<xs:simpleType>
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<xs:restriction base="xs:integer">
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<xs:totalDigits value="10"/>
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</xs:restriction>
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</xs:simpleType>
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</xs:element>
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<xs:element name="Bfloatval" nillable="true" minOccurs="0" maxOccurs="1">
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<xs:simpleType>
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<xs:restriction base="xs:decimal">
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</xs:restriction>
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</xs:simpleType>
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</xs:element>
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</xs:sequence>
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</xs:extension>
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</xs:complexContent>
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</xs:complexType>
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</xs:schema>
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61
python/plugins/processing/tests/testdata/expected/force_rhr_polys.gml
vendored
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61
python/plugins/processing/tests/testdata/expected/force_rhr_polys.gml
vendored
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@ -0,0 +1,61 @@
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<?xml version="1.0" encoding="utf-8" ?>
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<ogr:FeatureCollection
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://ogr.maptools.org/ force_rhr_polys.xsd"
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xmlns:ogr="http://ogr.maptools.org/"
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xmlns:gml="http://www.opengis.net/gml">
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<gml:boundedBy>
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<gml:Box>
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<gml:coord><gml:X>-1</gml:X><gml:Y>-3</gml:Y></gml:coord>
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<gml:coord><gml:X>10</gml:X><gml:Y>6</gml:Y></gml:coord>
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</gml:Box>
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</gml:boundedBy>
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<gml:featureMember>
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<ogr:force_rhr_polys fid="polys.0">
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<ogr:geometryProperty><gml:Polygon srsName="EPSG:4326"><gml:outerBoundaryIs><gml:LinearRing><gml:coordinates>-1,-1 -1,3 3,3 3,2 2,2 2,-1 -1,-1</gml:coordinates></gml:LinearRing></gml:outerBoundaryIs></gml:Polygon></ogr:geometryProperty>
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<ogr:name>aaaaa</ogr:name>
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<ogr:intval>33</ogr:intval>
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<ogr:floatval>44.123456</ogr:floatval>
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</ogr:force_rhr_polys>
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</gml:featureMember>
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<gml:featureMember>
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<ogr:force_rhr_polys fid="polys.1">
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<ogr:geometryProperty><gml:Polygon srsName="EPSG:4326"><gml:outerBoundaryIs><gml:LinearRing><gml:coordinates>5,5 6,4 4,4 5,5</gml:coordinates></gml:LinearRing></gml:outerBoundaryIs></gml:Polygon></ogr:geometryProperty>
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<ogr:name>Aaaaa</ogr:name>
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<ogr:intval>-33</ogr:intval>
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<ogr:floatval>0</ogr:floatval>
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</ogr:force_rhr_polys>
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</gml:featureMember>
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<gml:featureMember>
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<ogr:force_rhr_polys fid="polys.2">
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<ogr:geometryProperty><gml:Polygon srsName="EPSG:4326"><gml:outerBoundaryIs><gml:LinearRing><gml:coordinates>2,5 2,6 3,6 3,5 2,5</gml:coordinates></gml:LinearRing></gml:outerBoundaryIs></gml:Polygon></ogr:geometryProperty>
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<ogr:name>bbaaa</ogr:name>
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<ogr:intval xsi:nil="true"/>
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<ogr:floatval>0.123</ogr:floatval>
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</ogr:force_rhr_polys>
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</gml:featureMember>
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<gml:featureMember>
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<ogr:force_rhr_polys fid="polys.3">
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<ogr:geometryProperty><gml:Polygon srsName="EPSG:4326"><gml:outerBoundaryIs><gml:LinearRing><gml:coordinates>6,1 10,1 10,-3 6,-3 6,1</gml:coordinates></gml:LinearRing></gml:outerBoundaryIs><gml:innerBoundaryIs><gml:LinearRing><gml:coordinates>7,0 7,-2 9,-2 9,0 7,0</gml:coordinates></gml:LinearRing></gml:innerBoundaryIs></gml:Polygon></ogr:geometryProperty>
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<ogr:name>ASDF</ogr:name>
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<ogr:intval>0</ogr:intval>
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<ogr:floatval xsi:nil="true"/>
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</ogr:force_rhr_polys>
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</gml:featureMember>
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<gml:featureMember>
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<ogr:force_rhr_polys fid="polys.4">
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<ogr:name xsi:nil="true"/>
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<ogr:intval>120</ogr:intval>
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<ogr:floatval>-100291.43213</ogr:floatval>
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</ogr:force_rhr_polys>
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</gml:featureMember>
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<gml:featureMember>
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<ogr:force_rhr_polys fid="polys.5">
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<ogr:geometryProperty><gml:Polygon srsName="EPSG:4326"><gml:outerBoundaryIs><gml:LinearRing><gml:coordinates>3,2 6,1 6,-3 2,-1 2,2 3,2</gml:coordinates></gml:LinearRing></gml:outerBoundaryIs></gml:Polygon></ogr:geometryProperty>
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<ogr:name>elim</ogr:name>
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<ogr:intval>2</ogr:intval>
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<ogr:floatval>3.33</ogr:floatval>
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</ogr:force_rhr_polys>
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</gml:featureMember>
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</ogr:FeatureCollection>
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43
python/plugins/processing/tests/testdata/expected/force_rhr_polys.xsd
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43
python/plugins/processing/tests/testdata/expected/force_rhr_polys.xsd
vendored
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@ -0,0 +1,43 @@
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<?xml version="1.0" encoding="UTF-8"?>
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<xs:schema targetNamespace="http://ogr.maptools.org/" xmlns:ogr="http://ogr.maptools.org/" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:gml="http://www.opengis.net/gml" elementFormDefault="qualified" version="1.0">
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<xs:import namespace="http://www.opengis.net/gml" schemaLocation="http://schemas.opengis.net/gml/2.1.2/feature.xsd"/>
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<xs:element name="FeatureCollection" type="ogr:FeatureCollectionType" substitutionGroup="gml:_FeatureCollection"/>
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<xs:complexType name="FeatureCollectionType">
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<xs:complexContent>
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<xs:extension base="gml:AbstractFeatureCollectionType">
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<xs:attribute name="lockId" type="xs:string" use="optional"/>
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<xs:attribute name="scope" type="xs:string" use="optional"/>
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</xs:extension>
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</xs:complexContent>
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</xs:complexType>
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<xs:element name="force_rhr_polys" type="ogr:force_rhr_polys_Type" substitutionGroup="gml:_Feature"/>
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<xs:complexType name="force_rhr_polys_Type">
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<xs:complexContent>
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<xs:extension base="gml:AbstractFeatureType">
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<xs:sequence>
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<xs:element name="geometryProperty" type="gml:PolygonPropertyType" nillable="true" minOccurs="0" maxOccurs="1"/>
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<xs:element name="name" nillable="true" minOccurs="0" maxOccurs="1">
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<xs:simpleType>
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<xs:restriction base="xs:string">
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<xs:maxLength value="5"/>
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</xs:restriction>
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</xs:simpleType>
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</xs:element>
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<xs:element name="intval" nillable="true" minOccurs="0" maxOccurs="1">
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<xs:simpleType>
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<xs:restriction base="xs:integer">
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<xs:totalDigits value="10"/>
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</xs:restriction>
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</xs:simpleType>
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</xs:element>
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<xs:element name="floatval" nillable="true" minOccurs="0" maxOccurs="1">
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<xs:simpleType>
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<xs:restriction base="xs:decimal">
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</xs:restriction>
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</xs:simpleType>
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</xs:element>
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</xs:sequence>
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</xs:extension>
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</xs:complexContent>
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</xs:complexType>
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</xs:schema>
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@ -6325,4 +6325,26 @@ tests:
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name: expected/remove_duplicates3.gml
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type: vector
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- algorithm: native:forcerhr
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name: Force right-hand-rule polys
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params:
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INPUT:
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name: polys.gml|layername=polys2
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type: vector
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results:
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OUTPUT:
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name: expected/force_rhr_polys.gml
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type: vector
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- algorithm: native:forcerhr
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name: Force right-hand-rule multipolys
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params:
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INPUT:
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name: multipolys.gml|layername=multipolys
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type: vector
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results:
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OUTPUT:
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name: expected/force_rhr_multipolys.gml
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type: vector
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# See ../README.md for a description of the file format
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@ -50,6 +50,7 @@ SET(QGIS_ANALYSIS_SRCS
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processing/qgsalgorithmfilter.cpp
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processing/qgsalgorithmfiltervertices.cpp
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processing/qgsalgorithmfixgeometries.cpp
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processing/qgsalgorithmforcerhr.cpp
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processing/qgsalgorithmimportphotos.cpp
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processing/qgsalgorithminterpolatepoint.cpp
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processing/qgsalgorithmintersection.cpp
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125
src/analysis/processing/qgsalgorithmforcerhr.cpp
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125
src/analysis/processing/qgsalgorithmforcerhr.cpp
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/***************************************************************************
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qgsalgorithmforcerhr.cpp
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---------------------
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begin : November 2018
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copyright : (C) 2018 by Nyall Dawson
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email : nyall dot dawson at gmail dot com
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***************************************************************************/
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/***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************/
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#include "qgsalgorithmforcerhr.h"
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#include "qgsvectorlayer.h"
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#include "qgsgeometrycollection.h"
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#include "qgscurvepolygon.h"
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///@cond PRIVATE
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QString QgsForceRHRAlgorithm::name() const
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{
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return QStringLiteral( "forcerhr" );
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}
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QString QgsForceRHRAlgorithm::displayName() const
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{
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return QObject::tr( "Force right-hand-rule" );
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}
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QStringList QgsForceRHRAlgorithm::tags() const
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{
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return QObject::tr( "clockwise,counter,orientation,ring,repair,invalid,geometry,make,valid" ).split( ',' );
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}
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QString QgsForceRHRAlgorithm::group() const
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{
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return QObject::tr( "Vector geometry" );
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}
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QString QgsForceRHRAlgorithm::groupId() const
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{
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return QStringLiteral( "vectorgeometry" );
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}
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QgsProcessingFeatureSource::Flag QgsForceRHRAlgorithm::sourceFlags() const
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{
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return QgsProcessingFeatureSource::FlagSkipGeometryValidityChecks;
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}
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QString QgsForceRHRAlgorithm::outputName() const
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{
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return QObject::tr( "Reoriented" );
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}
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QString QgsForceRHRAlgorithm::shortHelpString() const
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{
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return QObject::tr( "This algorithm forces polygon geometries to respect the Right-Hand-Rule, in which the area that is bounded by a polygon "
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"is to the right of the boundary. In particular, the exterior ring is oriented in a clockwise direction and the interior "
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"rings in a counter-clockwise direction." );
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}
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QString QgsForceRHRAlgorithm::shortDescription() const
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{
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return QObject::tr( "Forces polygon geometries to respect the Right-Hand-Rule." );
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}
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QList<int> QgsForceRHRAlgorithm::inputLayerTypes() const
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{
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return QList<int>() << QgsProcessing::TypeVectorPolygon;
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}
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QgsForceRHRAlgorithm *QgsForceRHRAlgorithm::createInstance() const
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{
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return new QgsForceRHRAlgorithm();
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}
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QgsFeatureList QgsForceRHRAlgorithm::processFeature( const QgsFeature &feature, QgsProcessingContext &, QgsProcessingFeedback * )
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{
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if ( !feature.hasGeometry() )
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return QgsFeatureList() << feature;
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const QgsGeometry inputGeom = feature.geometry();
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QgsGeometry outputGeometry = inputGeom;
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if ( inputGeom.isMultipart() )
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{
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const QgsGeometryCollection *collection = qgsgeometry_cast< const QgsGeometryCollection * >( inputGeom.constGet() );
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std::unique_ptr< QgsGeometryCollection > newCollection( collection->createEmptyWithSameType() );
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for ( int i = 0; i < collection->numGeometries(); ++i )
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{
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const QgsAbstractGeometry *g = collection->geometryN( i );
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if ( const QgsCurvePolygon *cp = qgsgeometry_cast< const QgsCurvePolygon * >( g ) )
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{
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std::unique_ptr< QgsCurvePolygon > corrected( cp->clone() );
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corrected->forceRHR();
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newCollection->addGeometry( corrected.release() );
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}
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else
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{
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newCollection->addGeometry( g->clone() );
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}
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}
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outputGeometry = QgsGeometry( std::move( newCollection ) );
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}
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else
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{
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if ( const QgsCurvePolygon *cp = qgsgeometry_cast< const QgsCurvePolygon * >( inputGeom.constGet() ) )
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{
|
||||
std::unique_ptr< QgsCurvePolygon > corrected( cp->clone() );
|
||||
corrected->forceRHR();
|
||||
outputGeometry = QgsGeometry( std::move( corrected ) );
|
||||
}
|
||||
}
|
||||
|
||||
QgsFeature outputFeature = feature;
|
||||
outputFeature.setGeometry( outputGeometry );
|
||||
|
||||
return QgsFeatureList() << outputFeature;
|
||||
}
|
||||
|
||||
///@endcond
|
||||
58
src/analysis/processing/qgsalgorithmforcerhr.h
Normal file
58
src/analysis/processing/qgsalgorithmforcerhr.h
Normal file
@ -0,0 +1,58 @@
|
||||
/***************************************************************************
|
||||
qgsalgorithmforcerhr.h
|
||||
---------------------
|
||||
begin : November 2018
|
||||
copyright : (C) 2018 by Nyall Dawson
|
||||
email : nyall dot dawson at gmail dot com
|
||||
***************************************************************************/
|
||||
|
||||
/***************************************************************************
|
||||
* *
|
||||
* This program is free software; you can redistribute it and/or modify *
|
||||
* it under the terms of the GNU General Public License as published by *
|
||||
* the Free Software Foundation; either version 2 of the License, or *
|
||||
* (at your option) any later version. *
|
||||
* *
|
||||
***************************************************************************/
|
||||
|
||||
#ifndef QGSALGORITHMFORCERHR_H
|
||||
#define QGSALGORITHMFORCERHR_H
|
||||
|
||||
#define SIP_NO_FILE
|
||||
|
||||
#include "qgis.h"
|
||||
#include "qgsprocessingalgorithm.h"
|
||||
|
||||
///@cond PRIVATE
|
||||
|
||||
/**
|
||||
* Native force right-hand-rule algorithm.
|
||||
*/
|
||||
class QgsForceRHRAlgorithm : public QgsProcessingFeatureBasedAlgorithm
|
||||
{
|
||||
|
||||
public:
|
||||
|
||||
QgsForceRHRAlgorithm() = default;
|
||||
QString name() const override;
|
||||
QString displayName() const override;
|
||||
QStringList tags() const override;
|
||||
QString group() const override;
|
||||
QString groupId() const override;
|
||||
QString shortHelpString() const override;
|
||||
QString shortDescription() const override;
|
||||
QList<int> inputLayerTypes() const override;
|
||||
QgsForceRHRAlgorithm *createInstance() const override SIP_FACTORY;
|
||||
|
||||
protected:
|
||||
QgsProcessingFeatureSource::Flag sourceFlags() const override;
|
||||
QString outputName() const override;
|
||||
QgsFeatureList processFeature( const QgsFeature &feature, QgsProcessingContext &context, QgsProcessingFeedback *feedback ) override;
|
||||
|
||||
};
|
||||
|
||||
///@endcond PRIVATE
|
||||
|
||||
#endif // QGSALGORITHMFORCERHR_H
|
||||
|
||||
|
||||
@ -45,6 +45,7 @@
|
||||
#include "qgsalgorithmfilter.h"
|
||||
#include "qgsalgorithmfiltervertices.h"
|
||||
#include "qgsalgorithmfixgeometries.h"
|
||||
#include "qgsalgorithmforcerhr.h"
|
||||
#include "qgsalgorithmjoinbyattribute.h"
|
||||
#include "qgsalgorithmjoinwithlines.h"
|
||||
#include "qgsalgorithmimportphotos.h"
|
||||
@ -172,6 +173,7 @@ void QgsNativeAlgorithms::loadAlgorithms()
|
||||
addAlgorithm( new QgsFilterVerticesByM() );
|
||||
addAlgorithm( new QgsFilterVerticesByZ() );
|
||||
addAlgorithm( new QgsFixGeometriesAlgorithm() );
|
||||
addAlgorithm( new QgsForceRHRAlgorithm() );
|
||||
addAlgorithm( new QgsImportPhotosAlgorithm() );
|
||||
addAlgorithm( new QgsInterpolatePointAlgorithm() );
|
||||
addAlgorithm( new QgsIntersectionAlgorithm() );
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user