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Removes duplicate nodes from the geometry, wherever removing the nodes does not result in a degenerate geometry. By default, z values are not considered when detecting duplicate nodes. E.g. two nodes with the same x and y coordinate but different z values will still be considered duplicate and one will be removed. If useZValues is true, then the z values are also tested and nodes with the same x and y but different z will be maintained. Note that duplicate nodes are not tested between different parts of a multipart geometry. E.g. a multipoint geometry with overlapping points will not be changed by this method. The function will return true if nodes were removed, or false if no duplicate nodes were found. Includes unit tests and a processing algorithm which exposes this functionality.
212 lines
6.2 KiB
Plaintext
212 lines
6.2 KiB
Plaintext
/************************************************************************
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* This file has been generated automatically from *
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* *
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* src/core/geometry/qgsgeometrycollection.h *
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* *
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* Do not edit manually ! Edit header and run scripts/sipify.pl again *
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************************************************************************/
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class QgsGeometryCollection: QgsAbstractGeometry
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{
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%Docstring
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Geometry collection
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.. versionadded:: 2.10
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%End
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%TypeHeaderCode
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#include "qgsgeometrycollection.h"
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%End
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public:
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QgsGeometryCollection();
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QgsGeometryCollection( const QgsGeometryCollection &c );
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virtual ~QgsGeometryCollection();
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virtual QgsGeometryCollection *clone() const /Factory/;
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int numGeometries() const;
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%Docstring
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Returns the number of geometries within the collection.
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:rtype: int
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%End
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QgsAbstractGeometry *geometryN( int n );
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%Docstring
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Returns a geometry from within the collection.
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\param n index of geometry to return
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:rtype: QgsAbstractGeometry
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%End
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virtual bool isEmpty() const;
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virtual int dimension() const;
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virtual QString geometryType() const;
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virtual void clear();
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virtual QgsGeometryCollection *snappedToGrid( double hSpacing, double vSpacing, double dSpacing = 0, double mSpacing = 0 ) const /Factory/;
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virtual bool removeDuplicateNodes( double epsilon = 4 * DBL_EPSILON, bool useZValues = false );
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virtual QgsAbstractGeometry *boundary() const /Factory/;
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virtual void adjacentVertices( QgsVertexId vertex, QgsVertexId &previousVertex /Out/, QgsVertexId &nextVertex /Out/ ) const;
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virtual int vertexNumberFromVertexId( QgsVertexId id ) const;
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virtual bool addGeometry( QgsAbstractGeometry *g /Transfer/ );
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%Docstring
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Adds a geometry and takes ownership. Returns true in case of success.
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:rtype: bool
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%End
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virtual bool insertGeometry( QgsAbstractGeometry *g /Transfer/, int index );
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%Docstring
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Inserts a geometry before a specified index and takes ownership. Returns true in case of success.
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\param g geometry to insert. Ownership is transferred to the collection.
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\param index position to insert geometry before
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:rtype: bool
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%End
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virtual bool removeGeometry( int nr );
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%Docstring
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Removes a geometry from the collection.
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\param nr index of geometry to remove
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:return: true if removal was successful.
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:rtype: bool
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%End
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virtual void transform( const QgsCoordinateTransform &ct, QgsCoordinateTransform::TransformDirection d = QgsCoordinateTransform::ForwardTransform,
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bool transformZ = false );
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virtual void transform( const QTransform &t, double zTranslate = 0.0, double zScale = 1.0, double mTranslate = 0.0, double mScale = 1.0 );
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virtual void draw( QPainter &p ) const;
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virtual bool fromWkb( QgsConstWkbPtr &wkb );
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virtual bool fromWkt( const QString &wkt );
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virtual QByteArray asWkb() const;
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virtual QString asWkt( int precision = 17 ) const;
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virtual QDomElement asGml2( QDomDocument &doc, int precision = 17, const QString &ns = "gml" ) const;
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virtual QDomElement asGml3( QDomDocument &doc, int precision = 17, const QString &ns = "gml" ) const;
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virtual QString asJson( int precision = 17 ) const;
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virtual QgsRectangle boundingBox() const;
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virtual QgsCoordinateSequence coordinateSequence() const;
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virtual int nCoordinates() const;
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virtual double closestSegment( const QgsPoint &pt, QgsPoint &segmentPt /Out/, QgsVertexId &vertexAfter /Out/, int *leftOf /Out/ = 0, double epsilon = 4 * DBL_EPSILON ) const;
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virtual bool nextVertex( QgsVertexId &id, QgsPoint &vertex /Out/ ) const;
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virtual bool insertVertex( QgsVertexId position, const QgsPoint &vertex );
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virtual bool moveVertex( QgsVertexId position, const QgsPoint &newPos );
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virtual bool deleteVertex( QgsVertexId position );
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virtual double length() const;
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virtual double area() const;
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virtual double perimeter() const;
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virtual bool hasCurvedSegments() const;
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virtual QgsAbstractGeometry *segmentize( double tolerance = M_PI_2 / 90, SegmentationToleranceType toleranceType = MaximumAngle ) const /Factory/;
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%Docstring
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Returns a geometry without curves. Caller takes ownership
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\param tolerance segmentation tolerance
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\param toleranceType maximum segmentation angle or maximum difference between approximation and curve*
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:rtype: QgsAbstractGeometry
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%End
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virtual double vertexAngle( QgsVertexId vertex ) const;
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virtual double segmentLength( QgsVertexId startVertex ) const;
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virtual int vertexCount( int part = 0, int ring = 0 ) const;
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virtual int ringCount( int part = 0 ) const;
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virtual int partCount() const;
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virtual QgsPoint vertexAt( QgsVertexId id ) const;
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virtual bool addZValue( double zValue = 0 );
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virtual bool addMValue( double mValue = 0 );
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virtual bool dropZValue();
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virtual bool dropMValue();
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virtual QgsGeometryCollection *toCurveType() const /Factory/;
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protected:
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virtual QgsGeometryCollection *createEmptyWithSameType() const /Factory/;
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virtual int childCount() const;
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virtual QgsAbstractGeometry *childGeometry( int index ) const;
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protected:
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virtual bool wktOmitChildType() const;
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%Docstring
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Returns whether child type names are omitted from Wkt representations of the collection
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.. versionadded:: 2.12
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:rtype: bool
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%End
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bool fromCollectionWkt( const QString &wkt, const QVector<QgsAbstractGeometry *> &subtypes, const QString &defaultChildWkbType = QString() );
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%Docstring
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Reads a collection from a WKT string.
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:rtype: bool
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%End
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virtual QgsRectangle calculateBoundingBox() const;
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virtual void clearCache() const;
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};
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/************************************************************************
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* This file has been generated automatically from *
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* *
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* src/core/geometry/qgsgeometrycollection.h *
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* *
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* Do not edit manually ! Edit header and run scripts/sipify.pl again *
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************************************************************************/
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