Marble::GeoDataPolygon

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Marble::GeoDataPolygon Class Reference

#include <GeoDataPolygon.h>

Inheritance diagram for Marble::GeoDataPolygon:

Public Member Functions

 GeoDataPolygon (TessellationFlags f=NoTessellation)
 
 GeoDataPolygon (const GeoDataGeometry &other)
 
 ~GeoDataPolygon () override
 
void appendInnerBoundary (const GeoDataLinearRing &boundary)
 
virtual bool contains (const GeoDataCoordinates &coordinates) const
 
GeoDataGeometrycopy () const override
 
EnumGeometryId geometryId () const override
 
QVector< GeoDataLinearRing > & innerBoundaries ()
 
const QVector< GeoDataLinearRing > & innerBoundaries () const
 
virtual bool isClosed () const
 
const GeoDataLatLonAltBoxlatLonAltBox () const override
 
const char * nodeType () const override
 
bool operator!= (const GeoDataPolygon &other) const
 
bool operator== (const GeoDataPolygon &other) const
 
GeoDataLinearRingouterBoundary ()
 
const GeoDataLinearRingouterBoundary () const
 
void pack (QDataStream &stream) const override
 
int renderOrder () const
 
void setOuterBoundary (const GeoDataLinearRing &boundary)
 
void setRenderOrder (int)
 
void setTessellate (bool tessellate)
 
void setTessellationFlags (TessellationFlags f)
 
bool tessellate () const
 
TessellationFlags tessellationFlags () const
 
void unpack (QDataStream &stream) override
 
- Public Member Functions inherited from Marble::GeoDataGeometry
AltitudeMode altitudeMode () const
 
void detach ()
 
bool extrude () const
 
bool operator!= (const GeoDataGeometry &other) const
 
bool operator== (const GeoDataGeometry &other) const
 
void pack (QDataStream &stream) const override
 
void setAltitudeMode (const AltitudeMode altitudeMode)
 
void setExtrude (bool extrude)
 
void unpack (QDataStream &stream) override
 
- Public Member Functions inherited from Marble::GeoDataObject
 GeoDataObject (const GeoDataObject &)
 
QString id () const
 
GeoDataObjectoperator= (const GeoDataObject &)
 
void pack (QDataStream &stream) const override
 
const GeoDataObjectparent () const
 
GeoDataObjectparent ()
 
QString resolvePath (const QString &relativePath) const
 
void setId (const QString &value)
 
void setParent (GeoDataObject *parent)
 
void setTargetId (const QString &value)
 
QString targetId () const
 
void unpack (QDataStream &steam) override
 

Additional Inherited Members

- Protected Member Functions inherited from Marble::GeoDataGeometry
 GeoDataGeometry (GeoDataGeometryPrivate *priv)
 
 GeoDataGeometry (const GeoDataGeometry &other)
 
bool equals (const GeoDataGeometry &other) const
 
GeoDataGeometryoperator= (const GeoDataGeometry &other)
 
- Protected Member Functions inherited from Marble::GeoDataObject
virtual bool equals (const GeoDataObject &other) const
 
- Protected Attributes inherited from Marble::GeoDataGeometry
GeoDataGeometryPrivate * d_ptr
 

Detailed Description

A polygon that can have "holes".

GeoDataPolygon is a tool class that implements the Polygon tag/class of the Open Geospatial Consortium standard KML 2.2.

GeoDataPolygon extends GeoDataGeometry to store and edit Polygons.

In the QPainter API "pure" Polygons would represent polygons with "holes" inside. However QPolygon doesn't provide this feature directly.

Whenever a Polygon is painted GeoDataLineStyle should be used to assign a color and line width.

The polygon consists of

  • a single outer boundary and
  • optionally a set of inner boundaries.

All boundaries are LinearRings.

The boundaries of a GeoDataPolygon consist of several (geodetic) nodes which are each connected through line segments. The nodes are stored as GeoDataCoordinates objects.

The API which provides access to the nodes is similar to the API of QVector.

GeoDataPolygon allows Polygons to be tessellated in order to make them follow the terrain and the curvature of the earth. The tessellation options allow for different ways of visualization:

  • Not tessellated: A Polygon that connects each two nodes directly and straight in screen coordinate space.
  • A tessellated line: Each line segment is bent so that the Polygon follows the curvature of the earth and its terrain. A tessellated line segment connects two nodes at the shortest possible distance ("along great circles").
  • A tessellated line that follows latitude circles whenever possible: In this case Latitude circles are followed as soon as two subsequent nodes have exactly the same amount of latitude. In all other places the line segments follow great circles.

Some convenience methods have been added that allow to calculate the geodesic bounding box or the length of a Polygon.

See also
GeoDataLinearRing

Definition at line 76 of file GeoDataPolygon.h.

Constructor & Destructor Documentation

Marble::GeoDataPolygon::GeoDataPolygon ( TessellationFlags  f = NoTessellation)
explicit

Creates a new Polygon.

Definition at line 21 of file GeoDataPolygon.cpp.

Marble::GeoDataPolygon::GeoDataPolygon ( const GeoDataGeometry other)
explicit

Creates a Polygon from an existing geometry object.

Definition at line 27 of file GeoDataPolygon.cpp.

Marble::GeoDataPolygon::~GeoDataPolygon ( )
override

Destroys a Polygon.

Definition at line 33 of file GeoDataPolygon.cpp.

Member Function Documentation

void Marble::GeoDataPolygon::appendInnerBoundary ( const GeoDataLinearRing boundary)

Appends a given LinearRing as an inner boundary of the Polygon.

See also
GeoDataLinearRing

Definition at line 171 of file GeoDataPolygon.cpp.

bool Marble::GeoDataPolygon::contains ( const GeoDataCoordinates coordinates) const
virtual

Returns whether the given coordinates lie within the polygon.

Returns
true if the coordinates lie within the polygon (and not in its holes), false otherwise.

Definition at line 241 of file GeoDataPolygon.cpp.

QVector< GeoDataLinearRing > & Marble::GeoDataPolygon::innerBoundaries ( )

Returns a set of inner boundaries which are represented as LinearRings.

See also
GeoDataLinearRing

Definition at line 157 of file GeoDataPolygon.cpp.

const QVector< GeoDataLinearRing > & Marble::GeoDataPolygon::innerBoundaries ( ) const

Returns a set of inner boundaries which are represented as LinearRings.

See also
GeoDataLinearRing

Definition at line 165 of file GeoDataPolygon.cpp.

bool Marble::GeoDataPolygon::isClosed ( ) const
virtual

Returns whether a Polygon is a closed polygon.

Returns
true for a Polygon.

Definition at line 88 of file GeoDataPolygon.cpp.

const GeoDataLatLonAltBox & Marble::GeoDataPolygon::latLonAltBox ( ) const
overridevirtual

Returns the smallest latLonAltBox that contains the Polygon.

See also
GeoDataLatLonAltBox

Reimplemented from Marble::GeoDataGeometry.

Definition at line 129 of file GeoDataPolygon.cpp.

const char * Marble::GeoDataPolygon::nodeType ( ) const
overridevirtual

Provides type information for downcasting a GeoNode.

Implements Marble::GeoNode.

Definition at line 40 of file GeoDataPolygon.cpp.

bool Marble::GeoDataPolygon::operator== ( const GeoDataPolygon other) const

Returns true/false depending on whether this and other are/are not equal.

Definition at line 55 of file GeoDataPolygon.cpp.

GeoDataLinearRing & Marble::GeoDataPolygon::outerBoundary ( )

Returns the outer boundary that is represented as a LinearRing.

See also
GeoDataLinearRing

Definition at line 135 of file GeoDataPolygon.cpp.

const GeoDataLinearRing & Marble::GeoDataPolygon::outerBoundary ( ) const

Returns the outer boundary that is represented as a LinearRing.

See also
GeoDataLinearRing

Definition at line 143 of file GeoDataPolygon.cpp.

void Marble::GeoDataPolygon::pack ( QDataStream stream) const
override

Serialize the Polygon to a stream.

Parameters
streamthe stream.

Definition at line 193 of file GeoDataPolygon.cpp.

void Marble::GeoDataPolygon::setOuterBoundary ( const GeoDataLinearRing boundary)

Sets the given LinearRing as an outer boundary of the Polygon.

See also
GeoDataLinearRing

Definition at line 149 of file GeoDataPolygon.cpp.

void Marble::GeoDataPolygon::setTessellate ( bool  tessellate)

Sets the tessellation property for the Polygon.

If tessellate is true then the Polygon's line segments are bent and follow the earth's surface and terrain along great circles. If tessellate is false then the Polygon's line segments are rendered as straight lines in screen coordinate space.

Definition at line 99 of file GeoDataPolygon.cpp.

void Marble::GeoDataPolygon::setTessellationFlags ( TessellationFlags  f)

Sets the given tessellation flags for a Polygon.

Definition at line 121 of file GeoDataPolygon.cpp.

bool Marble::GeoDataPolygon::tessellate ( ) const

Returns whether the Polygon follows the earth's surface.

Returns
true if the Polygon's line segments follow the earth's surface and terrain along great circles.

Definition at line 93 of file GeoDataPolygon.cpp.

TessellationFlags Marble::GeoDataPolygon::tessellationFlags ( ) const

Returns the tessellation flags for a Polygon.

Definition at line 115 of file GeoDataPolygon.cpp.

void Marble::GeoDataPolygon::unpack ( QDataStream stream)
override

Unserialize the Polygon from a stream.

Parameters
streamthe stream.

Definition at line 214 of file GeoDataPolygon.cpp.


The documentation for this class was generated from the following files:
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