QGIS API Documentation  3.4.15-Madeira (e83d02e274)
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1 /***************************************************************************
2  qgscompoundcurve.h
3  ---------------------
4  begin : September 2014
5  copyright : (C) 2014 by Marco Hugentobler
6  email : marco at sourcepole dot ch
7  ***************************************************************************/
9 /***************************************************************************
10  * *
11  * This program is free software; you can redistribute it and/or modify *
12  * it under the terms of the GNU General Public License as published by *
13  * the Free Software Foundation; either version 2 of the License, or *
14  * (at your option) any later version. *
15  * *
16  ***************************************************************************/
21 #include "qgis_core.h"
22 #include "qgis.h"
23 #include "qgscurve.h"
31 class CORE_EXPORT QgsCompoundCurve: public QgsCurve
32 {
33  public:
35  QgsCompoundCurve( const QgsCompoundCurve &curve );
37  ~QgsCompoundCurve() override;
39  bool equals( const QgsCurve &other ) const override;
41  QString geometryType() const override;
42  int dimension() const override;
43  QgsCompoundCurve *clone() const override SIP_FACTORY;
44  void clear() override;
46  bool fromWkb( QgsConstWkbPtr &wkb ) override;
47  bool fromWkt( const QString &wkt ) override;
49  QByteArray asWkb() const override;
50  QString asWkt( int precision = 17 ) const override;
51  QDomElement asGml2( QDomDocument &doc, int precision = 17, const QString &ns = "gml", QgsAbstractGeometry::AxisOrder axisOrder = QgsAbstractGeometry::AxisOrder::XY ) const override;
52  QDomElement asGml3( QDomDocument &doc, int precision = 17, const QString &ns = "gml", QgsAbstractGeometry::AxisOrder axisOrder = QgsAbstractGeometry::AxisOrder::XY ) const override;
53  QString asJson( int precision = 17 ) const override;
55  //curve interface
56  double length() const override;
57  QgsPoint startPoint() const override;
58  QgsPoint endPoint() const override;
59  void points( QgsPointSequence &pts SIP_OUT ) const override;
60  int numPoints() const override;
61  bool isEmpty() const override;
68  QgsLineString *curveToLine( double tolerance = M_PI_2 / 90, SegmentationToleranceType toleranceType = MaximumAngle ) const override SIP_FACTORY;
70  QgsCompoundCurve *snappedToGrid( double hSpacing, double vSpacing, double dSpacing = 0, double mSpacing = 0 ) const override SIP_FACTORY;
71  bool removeDuplicateNodes( double epsilon = 4 * std::numeric_limits<double>::epsilon(), bool useZValues = false ) override;
76  int nCurves() const { return mCurves.size(); }
81  const QgsCurve *curveAt( int i ) const;
86  void addCurve( QgsCurve *c SIP_TRANSFER );
92  void removeCurve( int i );
97  void addVertex( const QgsPoint &pt );
99  void draw( QPainter &p ) const override;
101  void transform( const QTransform &t, double zTranslate = 0.0, double zScale = 1.0, double mTranslate = 0.0, double mScale = 1.0 ) override;
102  void addToPainterPath( QPainterPath &path ) const override;
103  void drawAsPolygon( QPainter &p ) const override;
104  bool insertVertex( QgsVertexId position, const QgsPoint &vertex ) override;
105  bool moveVertex( QgsVertexId position, const QgsPoint &newPos ) override;
106  bool deleteVertex( QgsVertexId position ) override;
107  double closestSegment( const QgsPoint &pt, QgsPoint &segmentPt SIP_OUT, QgsVertexId &vertexAfter SIP_OUT, int *leftOf SIP_OUT = nullptr, double epsilon = 4 * std::numeric_limits<double>::epsilon() ) const override;
108  bool pointAt( int node, QgsPoint &point, QgsVertexId::VertexType &type ) const override;
109  void sumUpArea( double &sum SIP_OUT ) const override;
112  void close();
114  bool hasCurvedSegments() const override;
115  double vertexAngle( QgsVertexId vertex ) const override;
116  double segmentLength( QgsVertexId startVertex ) const override;
117  QgsCompoundCurve *reversed() const override SIP_FACTORY;
118  QgsPoint *interpolatePoint( double distance ) const override SIP_FACTORY;
119  QgsCompoundCurve *curveSubstring( double startDistance, double endDistance ) const override SIP_FACTORY;
121  bool addZValue( double zValue = 0 ) override;
122  bool addMValue( double mValue = 0 ) override;
124  bool dropZValue() override;
125  bool dropMValue() override;
126  void swapXy() override;
128  double xAt( int index ) const override;
129  double yAt( int index ) const override;
131 #ifndef SIP_RUN
132  void filterVertices( const std::function< bool( const QgsPoint & ) > &filter ) override;
133  void transformVertices( const std::function< QgsPoint( const QgsPoint & ) > &transform ) override;
142  inline const QgsCompoundCurve *cast( const QgsAbstractGeometry *geom ) const
143  {
144  if ( geom && QgsWkbTypes::flatType( geom->wkbType() ) == QgsWkbTypes::CompoundCurve )
145  return static_cast<const QgsCompoundCurve *>( geom );
146  return nullptr;
147  }
148 #endif
152 #ifdef SIP_RUN
153  SIP_PYOBJECT __repr__();
154  % MethodCode
155  QString wkt = sipCpp->asWkt();
156  if ( wkt.length() > 1000 )
157  wkt = wkt.left( 1000 ) + QStringLiteral( "..." );
158  QString str = QStringLiteral( "<QgsCompoundCurve: %1>" ).arg( wkt );
159  sipRes = PyUnicode_FromString( str.toUtf8().constData() );
160  % End
161 #endif
163  protected:
165  QgsRectangle calculateBoundingBox() const override;
167  private:
168  QVector< QgsCurve * > mCurves;
173  QVector< QPair<int, QgsVertexId> > curveVertexId( QgsVertexId id ) const;
175 };
177 // clazy:excludeall=qstring-allocations
virtual QgsCurve * reversed() const =0
Returns a reversed copy of the curve, where the direction of the curve has been flipped.
virtual QString asWkt(int precision=17) const =0
Returns a WKT representation of the geometry.
int precision
virtual bool isEmpty() const
Returns true if the geometry is empty.
A rectangle specified with double values.
Definition: qgsrectangle.h:40
virtual QgsAbstractGeometry * snappedToGrid(double hSpacing, double vSpacing, double dSpacing=0, double mSpacing=0) const =0
Makes a new geometry with all the points or vertices snapped to the closest point of the grid...
virtual void transformVertices(const std::function< QgsPoint(const QgsPoint &) > &transform)
Transforms the vertices from the geometry in place, applying the transform function to every vertex...
virtual bool deleteVertex(QgsVertexId position)=0
Deletes a vertex within the geometry.
virtual QgsPoint * interpolatePoint(double distance) const =0
Returns an interpolated point on the curve at the specified distance.
virtual void transform(const QgsCoordinateTransform &ct, QgsCoordinateTransform::TransformDirection d=QgsCoordinateTransform::ForwardTransform, bool transformZ=false) SIP_THROW(QgsCsException)=0
Transforms the geometry using a coordinate transform.
virtual QByteArray asWkb() const =0
Returns a WKB representation of the geometry.
QgsAbstractGeometry & operator=(const QgsAbstractGeometry &geom)
virtual bool hasCurvedSegments() const
Returns true if the geometry contains curved segments.
virtual bool insertVertex(QgsVertexId position, const QgsPoint &vertex)=0
Inserts a vertex into the geometry.
Enum used to indicate the direction (forward or inverse) of the transform.
QgsWkbTypes::Type wkbType() const
Returns the WKB type of the geometry.
virtual double vertexAngle(QgsVertexId vertex) const =0
Returns approximate angle at a vertex.
virtual bool addMValue(double mValue=0)=0
Adds a measure to the geometry, initialized to a preset value.
virtual void sumUpArea(double &sum) const =0
Sums up the area of the curve by iterating over the vertices (shoelace formula).
virtual QgsAbstractGeometry * createEmptyWithSameType() const =0
Creates a new geometry with the same class and same WKB type as the original and transfers ownership...
virtual QString asJson(int precision=17) const =0
Returns a GeoJSON representation of the geometry.
virtual QDomElement asGml2(QDomDocument &doc, int precision=17, const QString &ns="gml", AxisOrder axisOrder=QgsAbstractGeometry::AxisOrder::XY) const =0
Returns a GML2 representation of the geometry.
Segmentation tolerance as maximum angle or maximum difference between approximation and circle...
virtual bool pointAt(int node, QgsPoint &point, QgsVertexId::VertexType &type) const =0
Returns the point and vertex id of a point within the curve.
virtual bool equals(const QgsCurve &other) const =0
Checks whether this curve exactly equals another curve.
virtual QgsRectangle calculateBoundingBox() const
Default calculator for the minimal bounding box for the geometry.
As part of the API refactoring and improvements which landed in the Processing API was substantially reworked from the x version This was done in order to allow much of the underlying Processing framework to be ported into c
virtual QgsPoint endPoint() const =0
Returns the end point of the curve.
virtual double closestSegment(const QgsPoint &pt, QgsPoint &segmentPt, QgsVertexId &vertexAfter, int *leftOf=nullptr, double epsilon=4 *std::numeric_limits< double >::epsilon()) const =0
Searches for the closest segment of the geometry to a given point.
virtual double segmentLength(QgsVertexId startVertex) const =0
Returns the length of the segment of the geometry which begins at startVertex.
virtual void filterVertices(const std::function< bool(const QgsPoint &) > &filter)
Filters the vertices from the geometry in place, removing any which do not return true for the filter...
virtual QgsCurve * curveSubstring(double startDistance, double endDistance) const =0
Returns a new curve representing a substring of this curve.
Utility class for identifying a unique vertex within a geometry.
int nCurves() const
Returns the number of curves in the geometry.
Definition: qgis_sip.h:36
virtual double xAt(int index) const =0
Returns the x-coordinate of the specified node in the line string.
Abstract base class for curved geometry type.
Definition: qgscurve.h:35
Definition: qgis_sip.h:69
Abstract base class for all geometries.
virtual int dimension() const =0
Returns the inherent dimension of the geometry.
Point geometry type, with support for z-dimension and m-values.
Definition: qgspoint.h:37
Axis order for GML generation.
virtual double length() const
Returns the length of the geometry.
QVector< QgsPoint > QgsPointSequence
virtual void addToPainterPath(QPainterPath &path) const =0
Adds a curve to a painter path.
const QgsCompoundCurve * cast(const QgsAbstractGeometry *geom) const
Cast the geom to a QgsCompoundCurve.
virtual void clear()=0
Clears the geometry, ie reset it to a null geometry.
virtual bool moveVertex(QgsVertexId position, const QgsPoint &newPos)=0
Moves a vertex within the geometry.
QgsCurve * clone() const override=0
Clones the geometry by performing a deep copy.
virtual void draw(QPainter &p) const =0
Draws the geometry using the specified QPainter.
#define SIP_OUT
Definition: qgis_sip.h:51
virtual bool addZValue(double zValue=0)=0
Adds a z-dimension to the geometry, initialized to a preset value.
Line string geometry type, with support for z-dimension and m-values.
Definition: qgslinestring.h:43
virtual QgsLineString * curveToLine(double tolerance=M_PI_2/90, SegmentationToleranceType toleranceType=MaximumAngle) const =0
Returns a new line string geometry corresponding to a segmentized approximation of the curve...
virtual double yAt(int index) const =0
Returns the y-coordinate of the specified node in the line string.
Class for doing transforms between two map coordinate systems.
#define SIP_THROW(name)
Definition: qgis_sip.h:177
Transform from source to destination CRS.
Compound curve geometry type.
virtual bool removeDuplicateNodes(double epsilon=4 *std::numeric_limits< double >::epsilon(), bool useZValues=false)=0
Removes duplicate nodes from the geometry, wherever removing the nodes does not result in a degenerat...
Custom exception class for Coordinate Reference System related exceptions.
Definition: qgsexception.h:65
virtual void drawAsPolygon(QPainter &p) const =0
Draws the curve as a polygon on the specified QPainter.
virtual bool dropMValue()=0
Drops any measure values which exist in the geometry.
virtual bool fromWkt(const QString &wkt)=0
Sets the geometry from a WKT string.
virtual QgsPoint startPoint() const =0
Returns the starting point of the curve.
static Type flatType(Type type)
Returns the flat type for a WKB type.
Definition: qgswkbtypes.h:565
virtual void swapXy()=0
Swaps the x and y coordinates from the geometry.
virtual int numPoints() const =0
Returns the number of points in the curve.
double ANALYSIS_EXPORT leftOf(const QgsPoint &thepoint, const QgsPoint *p1, const QgsPoint *p2)
Returns whether &#39;thepoint&#39; is left or right of the line from &#39;p1&#39; to &#39;p2&#39;. Negativ values mean left a...
Definition: MathUtils.cpp:292
virtual bool dropZValue()=0
Drops any z-dimensions which exist in the geometry.
virtual void points(QgsPointSequence &pt) const =0
Returns a list of points within the curve.
virtual QDomElement asGml3(QDomDocument &doc, int precision=17, const QString &ns="gml", AxisOrder axisOrder=QgsAbstractGeometry::AxisOrder::XY) const =0
Returns a GML3 representation of the geometry.
virtual QString geometryType() const =0
Returns a unique string representing the geometry type.
virtual bool fromWkb(QgsConstWkbPtr &wkb)=0
Sets the geometry from a WKB string.