Marble::GeoDataPolygon Class Reference

#include <GeoDataPolygon.h>

Inheritance diagram for Marble::GeoDataPolygon:

Public Member Functions
	GeoDataPolygon (const GeoDataGeometry &other)
	GeoDataPolygon (TessellationFlags f=NoTessellation)
	~GeoDataPolygon () override
void	appendInnerBoundary (const GeoDataLinearRing &boundary)
virtual bool	contains (const GeoDataCoordinates &coordinates) const
GeoDataGeometry *	copy () const override
EnumGeometryId	geometryId () const override
QVector< GeoDataLinearRing > &	innerBoundaries ()
const QVector< GeoDataLinearRing > &	innerBoundaries () const
virtual bool	isClosed () const
const GeoDataLatLonAltBox &	latLonAltBox () const override
const char *	nodeType () const override
bool	operator!= (const GeoDataPolygon &other) const
bool	operator== (const GeoDataPolygon &other) const
GeoDataLinearRing &	outerBoundary ()
const GeoDataLinearRing &	outerBoundary () 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
GeoDataObject &	operator= (const GeoDataObject &)
void	pack (QDataStream &stream) const override
GeoDataObject *	parent ()
const GeoDataObject *	parent () const
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 (const GeoDataGeometry &other)
	GeoDataGeometry (GeoDataGeometryPrivate *priv)
bool	equals (const GeoDataGeometry &other) const
virtual bool	equals (const GeoDataObject &other) const
GeoDataGeometry &	operator= (const GeoDataGeometry &other)
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

GeoDataPolygon() [1/2]

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

explicit

Creates a new Polygon.

Definition at line 21 of file GeoDataPolygon.cpp.

GeoDataPolygon() [2/2]

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

explicit

Creates a Polygon from an existing geometry object.

Definition at line 27 of file GeoDataPolygon.cpp.

~GeoDataPolygon()

Marble::GeoDataPolygon::~GeoDataPolygon ( )

override

Destroys a Polygon.

Definition at line 33 of file GeoDataPolygon.cpp.

Member Function Documentation

appendInnerBoundary()

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.

contains()

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.

copy()

GeoDataGeometry * Marble::GeoDataPolygon::copy ( ) const

overridevirtual

Implements Marble::GeoDataGeometry.

Definition at line 50 of file GeoDataPolygon.cpp.

geometryId()

EnumGeometryId Marble::GeoDataPolygon::geometryId ( ) const

overridevirtual

Implements Marble::GeoDataGeometry.

Definition at line 45 of file GeoDataPolygon.cpp.

innerBoundaries() [1/2]

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.

innerBoundaries() [2/2]

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.

isClosed()

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.

latLonAltBox()

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.

nodeType()

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.

operator!=()

bool Marble::GeoDataPolygon::operator!=

(

const GeoDataPolygon &

other

)

const

Definition at line 83 of file GeoDataPolygon.cpp.

operator==()

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.

outerBoundary() [1/2]

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.

outerBoundary() [2/2]

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.

pack()

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

override

Serialize the Polygon to a stream.

Parameters

stream

the stream.

Definition at line 193 of file GeoDataPolygon.cpp.

renderOrder()

int Marble::GeoDataPolygon::renderOrder

(

)

const

Definition at line 187 of file GeoDataPolygon.cpp.

setOuterBoundary()

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.

setRenderOrder()

void Marble::GeoDataPolygon::setRenderOrder

(

int

renderOrder

)

Definition at line 179 of file GeoDataPolygon.cpp.

setTessellate()

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.

setTessellationFlags()

void Marble::GeoDataPolygon::setTessellationFlags

(

TessellationFlags

f

)

Sets the given tessellation flags for a Polygon.

Definition at line 121 of file GeoDataPolygon.cpp.

tessellate()

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()

TessellationFlags Marble::GeoDataPolygon::tessellationFlags

(

)

const

Returns the tessellation flags for a Polygon.

Definition at line 115 of file GeoDataPolygon.cpp.

unpack()

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

override

Unserialize the Polygon from a stream.

Parameters

stream

the stream.

Definition at line 214 of file GeoDataPolygon.cpp.

---

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

• GeoDataPolygon.h
• GeoDataPolygon.cpp