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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.
118 lines
3.8 KiB
Plaintext
118 lines
3.8 KiB
Plaintext
class QgsCircularString: public QgsCurve
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{
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%TypeHeaderCode
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#include <qgscircularstring.h>
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%End
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public:
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QgsCircularString();
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~QgsCircularString();
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virtual bool operator==( const QgsCurve& other ) const;
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virtual bool operator!=( const QgsCurve& other ) const;
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virtual QString geometryType() const;
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virtual int dimension() const;
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virtual QgsCircularString* clone() const /Factory/;
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virtual 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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bool isEmpty() const;
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int numPoints() const;
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/** Returns the point at index i within the circular string.
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*/
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QgsPointV2 pointN( int i ) const;
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/**
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* @copydoc QgsCurve::points()
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*/
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void points( QList<QgsPointV2>& pts ) const;
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/** Sets the circular string's points
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*/
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void setPoints( const QList<QgsPointV2>& points );
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/**
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* @copydoc QgsAbstractGeometry::length()
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*/
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virtual double length() const;
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/**
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* @copydoc QgsCurve::startPoint()
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*/
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virtual QgsPointV2 startPoint() const;
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/**
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* @copydoc QgsCurve::endPoint()
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*/
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virtual QgsPointV2 endPoint() const;
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/** Returns a new line string 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 QgsLineString* curveToLine( double tolerance = M_PI_2 / 90, SegmentationToleranceType toleranceType = MaximumAngle ) const /Factory/;
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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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void addToPainterPath( QPainterPath& path ) const;
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/**
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* @copydoc QgsCurve::drawAsPolygon()
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*/
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void drawAsPolygon( QPainter& p ) const;
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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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double closestSegment( const QgsPointV2& pt, QgsPointV2& segmentPt, QgsVertexId& vertexAfter, bool* leftOf, double epsilon ) const;
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/**
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* @copydoc QgsCurve::pointAt()
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*/
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bool pointAt( int node, QgsPointV2& point, QgsVertexId::VertexType& type ) const;
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/**
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* @copydoc QgsCurve::sumUpArea()
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*/
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void sumUpArea( double& sum ) const;
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/**
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* @copydoc QgsAbstractGeometry::hasCurvedSegments()
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*/
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bool hasCurvedSegments() const;
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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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double vertexAngle( QgsVertexId vertex ) const;
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virtual QgsCircularString* reversed() const /Factory/;
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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 double xAt( int index ) const;
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virtual double yAt( int index ) const;
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protected:
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virtual QgsRectangle calculateBoundingBox() const;
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private:
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//helper methods for curveToLine
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void segmentize( const QgsPointV2& p1, const QgsPointV2& p2, const QgsPointV2& p3, QList<QgsPointV2>& points ) const;
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};
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