Marble::GeoDataLinearRing Class Reference

#include <GeoDataLinearRing.h>

Inheritance diagram for Marble::GeoDataLinearRing:

Public Member Functions
	GeoDataLinearRing (const GeoDataGeometry &other)
	GeoDataLinearRing (TessellationFlags f=NoTessellation)
	~GeoDataLinearRing () override
virtual bool	contains (const GeoDataCoordinates &coordinates) const
GeoDataGeometry *	copy () const override
EnumGeometryId	geometryId () const override
virtual bool	isClockwise () const
bool	isClosed () const override
qreal	length (qreal planetRadius, int offset=0) const override
const char *	nodeType () const override
bool	operator!= (const GeoDataLinearRing &other) const
bool	operator== (const GeoDataLinearRing &other) const
Public Member Functions inherited from Marble::GeoDataLineString
	GeoDataLineString (const GeoDataGeometry &other)
	GeoDataLineString (TessellationFlags f=NoTessellation)
	~GeoDataLineString () override
void	append (const GeoDataCoordinates &value)
void	append (const QVector< GeoDataCoordinates > &values)
GeoDataCoordinates &	at (int pos)
const GeoDataCoordinates &	at (int pos) const
QVector< GeoDataCoordinates >::Iterator	begin ()
QVector< GeoDataCoordinates >::ConstIterator	begin () const
void	clear ()
QVector< GeoDataCoordinates >::ConstIterator	constBegin () const
QVector< GeoDataCoordinates >::ConstIterator	constEnd () const
GeoDataGeometry *	copy () const override
QVector< GeoDataCoordinates >::Iterator	end ()
QVector< GeoDataCoordinates >::ConstIterator	end () const
QVector< GeoDataCoordinates >::Iterator	erase (const QVector< GeoDataCoordinates >::Iterator &begin, const QVector< GeoDataCoordinates >::Iterator &end)
QVector< GeoDataCoordinates >::Iterator	erase (const QVector< GeoDataCoordinates >::Iterator &position)
GeoDataCoordinates &	first ()
const GeoDataCoordinates &	first () const
EnumGeometryId	geometryId () const override
void	insert (int index, const GeoDataCoordinates &value)
bool	isEmpty () const
GeoDataCoordinates &	last ()
const GeoDataCoordinates &	last () const
const GeoDataLatLonAltBox &	latLonAltBox () const override
GeoDataLineString	mid (int pos, int length=-1) const
const char *	nodeType () const override
bool	operator!= (const GeoDataLineString &other) const
GeoDataLineString &	operator<< (const GeoDataCoordinates &value)
GeoDataLineString &	operator<< (const GeoDataLineString &lineString)
bool	operator== (const GeoDataLineString &other) const
GeoDataCoordinates &	operator[] (int pos)
const GeoDataCoordinates &	operator[] (int pos) const
GeoDataLineString	optimized () const
void	pack (QDataStream &stream) const override
void	remove (int i)
void	reserve (int size)
void	reverse ()
void	setTessellate (bool tessellate)
void	setTessellationFlags (TessellationFlags f)
int	size () const
bool	tessellate () const
TessellationFlags	tessellationFlags () const
virtual QVector< GeoDataLineString * >	toDateLineCorrected () const
virtual GeoDataLineString	toNormalized () const
virtual GeoDataLineString	toPoleCorrected () const
virtual GeoDataLineString	toRangeCorrected () const
QVariantList	toVariantList () 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
Public Types inherited from Marble::GeoDataLineString
using	ConstIterator = QVector<GeoDataCoordinates>::ConstIterator
using	Iterator = QVector<GeoDataCoordinates>::Iterator
Protected Member Functions inherited from Marble::GeoDataLineString
	GeoDataLineString (GeoDataLineStringPrivate *priv)
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 LinearRing that allows to store a closed, contiguous set of line segments.

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

Unlike suggested in the KML spec GeoDataLinearRing extends GeoDataLineString to store a closed LineString (the KML specification suggests to inherit from the Geometry class directly).

In the QPainter API LinearRings are also referred to as "polygons". As such they are similar to QPolygons.

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

A GeoDataLinearRing consists 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.

GeoDataLinearRing allows LinearRings 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 LinearRing that connects each two nodes directly and straight in screen coordinate space.
• A tessellated line: Each line segment is bent so that the LinearRing 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 LinearRing.

Definition at line 62 of file GeoDataLinearRing.h.

Constructor & Destructor Documentation

GeoDataLinearRing() [1/2]

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

explicit

Creates a new LinearRing.

Definition at line 16 of file GeoDataLinearRing.cpp.

GeoDataLinearRing() [2/2]

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

explicit

Creates a LinearRing from an existing geometry object.

Definition at line 21 of file GeoDataLinearRing.cpp.

~GeoDataLinearRing()

Marble::GeoDataLinearRing::~GeoDataLinearRing ( )

override

Destroys a LinearRing.

Definition at line 26 of file GeoDataLinearRing.cpp.

Member Function Documentation

contains()

bool Marble::GeoDataLinearRing::contains ( const GeoDataCoordinates & coordinates ) const

virtual

Returns whether the given coordinates lie within the polygon.

Returns

true if the coordinates lie within the polygon, false otherwise.

Definition at line 68 of file GeoDataLinearRing.cpp.

copy()

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

overridevirtual

Implements Marble::GeoDataGeometry.

Definition at line 40 of file GeoDataLinearRing.cpp.

geometryId()

EnumGeometryId Marble::GeoDataLinearRing::geometryId ( ) const

overridevirtual

Implements Marble::GeoDataGeometry.

Definition at line 35 of file GeoDataLinearRing.cpp.

isClockwise()

bool Marble::GeoDataLinearRing::isClockwise ( ) const

virtual

Returns whether the orientaion of ring is coloskwise or not.

Returns

Return value is true if ring is clockwise orientated

Definition at line 96 of file GeoDataLinearRing.cpp.

isClosed()

bool Marble::GeoDataLinearRing::isClosed ( ) const

overridevirtual

Returns whether a LinearRing is a closed polygon.

Returns

true for a LinearRing.

Reimplemented from Marble::GeoDataLineString.

Definition at line 56 of file GeoDataLinearRing.cpp.

length()

qreal Marble::GeoDataLinearRing::length ( qreal planetRadius, int offset = 0 ) const

overridevirtual

Returns the length of the LinearRing across a sphere.

As a parameter the planetRadius needs to be passed.

Returns

The return value is the length of the LinearRing. The unit used for the resulting length matches the unit of the planet radius.

This method can be used as an approximation for the circumference of a LinearRing.

Reimplemented from Marble::GeoDataLineString.

Definition at line 61 of file GeoDataLinearRing.cpp.

nodeType()

const char * Marble::GeoDataLinearRing::nodeType ( ) const

overridevirtual

Provides type information for downcasting a GeoNode.

Implements Marble::GeoNode.

Definition at line 30 of file GeoDataLinearRing.cpp.

operator!=()

bool Marble::GeoDataLinearRing::operator!=

(

const GeoDataLinearRing &

other

)

const

Definition at line 51 of file GeoDataLinearRing.cpp.

operator==()

bool Marble::GeoDataLinearRing::operator==

(

const GeoDataLinearRing &

other

)

const

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

Definition at line 45 of file GeoDataLinearRing.cpp.

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

• GeoDataLinearRing.h
• GeoDataLinearRing.cpp