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af0d68b882
Faster than QgsGeometry::isGeosEmpty() because it avoids the conversion to GEOS geometries and just uses the QgsAbstractGeometry subclasses directly. Also implements faster isEmpty() overrides for specific QgsAbstractGeometry subclasses.
116 lines
4.9 KiB
Plaintext
116 lines
4.9 KiB
Plaintext
class QgsCurvePolygon: public QgsSurface
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{
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%TypeHeaderCode
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#include <qgscurvepolygon.h>
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%End
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public:
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QgsCurvePolygon();
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QgsCurvePolygon( const QgsCurvePolygon& p );
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//QgsCurvePolygon& operator=( const QgsCurvePolygon& p );
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~QgsCurvePolygon();
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virtual QString geometryType() const;
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virtual int dimension() const;
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virtual QgsCurvePolygon* clone() const /Factory/;
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void clear();
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virtual bool fromWkb( QgsConstWkbPtr& wkb );
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virtual bool fromWkt( const QString& wkt );
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QByteArray asWkb() const;
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QString asWkt( int precision = 17 ) const;
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QDomElement asGML2( QDomDocument& doc, int precision = 17, const QString& ns = "gml" ) const;
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QDomElement asGML3( QDomDocument& doc, int precision = 17, const QString& ns = "gml" ) const;
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QString asJSON( int precision = 17 ) const;
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//surface interface
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virtual double area() const;
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virtual double perimeter() const;
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QgsPolygonV2* surfaceToPolygon() const /Factory/;
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virtual QgsAbstractGeometry* boundary() const /Factory/;
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//curve polygon interface
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int numInteriorRings() const;
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const QgsCurve* exteriorRing() const;
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const QgsCurve* interiorRing( int i ) const;
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/** Returns a new polygon geometry corresponding to a segmentized approximation
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* of the curve.
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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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virtual QgsPolygonV2* toPolygon( double tolerance = M_PI_2 / 90, SegmentationToleranceType toleranceType = MaximumAngle ) const;
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/** Sets the exterior ring of the polygon. The CurvePolygon type will be updated to match the dimensionality
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* of the exterior ring. For instance, setting a 2D exterior ring on a 3D CurvePolygon will drop the z dimension
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* from the CurvePolygon and all interior rings.
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* @param ring new exterior ring. Ownership is transferred to the CurvePolygon.
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* @see setInteriorRings()
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* @see exteriorRing()
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*/
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virtual void setExteriorRing( QgsCurve* ring /Transfer/ );
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/** Sets all interior rings (takes ownership)*/
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void setInteriorRings( const QList<QgsCurve*>& rings );
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/** Adds an interior ring to the geometry (takes ownership)*/
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virtual void addInteriorRing( QgsCurve* ring /Transfer/ );
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/**
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* Removes an interior ring from the polygon. The first interior ring has index 0.
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* The corresponding ring is removed from the polygon and deleted. If a ring was successfully removed
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* the function will return true. It is not possible to remove the exterior ring using this method.
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* @see removeInteriorRings()
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*/
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bool removeInteriorRing( int ringIndex );
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/**
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* Removes the interior rings from the polygon. If the minimumAllowedArea
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* parameter is specified then only rings smaller than this minimum
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* area will be removed.
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* @note added in QGIS 3.0
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* @see removeInteriorRing()
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*/
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void removeInteriorRings( double minimumAllowedArea = -1 );
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virtual void draw( QPainter& p ) const;
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void transform( const QgsCoordinateTransform& ct, QgsCoordinateTransform::TransformDirection d = QgsCoordinateTransform::ForwardTransform,
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bool transformZ = false );
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void transform( const QTransform& t );
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virtual bool insertVertex( QgsVertexId position, const QgsPointV2& vertex );
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virtual bool moveVertex( QgsVertexId position, const QgsPointV2& newPos );
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virtual bool deleteVertex( QgsVertexId position );
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virtual QList< QList< QList< QgsPointV2 > > > coordinateSequence() const;
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virtual int nCoordinates() const;
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bool isEmpty() const;
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double closestSegment( const QgsPointV2& pt, QgsPointV2& segmentPt, QgsVertexId& vertexAfter, bool* leftOf, double epsilon ) const;
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bool nextVertex( QgsVertexId& id, QgsPointV2& vertex ) const;
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bool hasCurvedSegments() const;
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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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QgsAbstractGeometry* segmentize( double tolerance = M_PI_2 / 90, SegmentationToleranceType toleranceType = MaximumAngle ) const /Factory/;
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/** Returns approximate rotation angle for a vertex. Usually average angle between adjacent segments.
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* @param vertex the vertex id
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* @return rotation in radians, clockwise from north
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*/
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double vertexAngle( QgsVertexId vertex ) 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 QgsPointV2 vertexAt( const 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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protected:
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virtual QgsRectangle calculateBoundingBox() const;
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};
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