IlvMapArcSegment Class Reference

This class defines a circular arc segment. More...

#include <ilviews/maps/geometry/geoarcseg.h>

Inheritance diagram for IlvMapArcSegment:

Public Member Functions
	IlvMapArcSegment ()
	Initializes a new arc segment.
	IlvMapArcSegment (const IlvCoordinate &start, const IlvCoordinate &intermediate, const IlvCoordinate &end)
	Initializes a new arc segment that goes through three points. More...
	IlvMapArcSegment (const IlvMapArcSegment &source)
	Initializes a new arc segment by copying an existing one. More...
virtual IlvMapGeometry *	copy () const
	Returns a copy of the object. More...
virtual IlvClassInfo *	getClassInfo () const
	Returns the IlvClassInfo of the instance. More...
virtual const IlvCoordinate &	getEndPoint () const
	Returns the end point of the segment. More...
virtual IlUInt	getHorizontalIntersectionCount (const IlvCoordinate &) const
	Returns the number of intersections between this segment and an horizontal half line. More...
const IlvCoordinate &	getIntermediatePoint () const
	Returns the intermediate point of the arc. More...
virtual const IlvCoordinate &	getStartPoint () const
	Returns the start point of the segment. More...
virtual const IlvMapGeometry *	getSubElement (IlUInt) const
	Returns a sub element of a collection geometry. More...
virtual IlUInt	getSubElementCount () const
	Returns the number of elements contained in the geometry if the geometry is a collection. More...
virtual IlBoolean	isCollection () const
	Checks if this geometry is a collection of other geometries. More...
virtual void	setEndPoint (const IlvCoordinate &)
	Sets the end point of the segment. More...
void	setIntermediatePoint (const IlvCoordinate &intermediate)
	Sets the intermediate point of the arc. More...
virtual void	setStartPoint (const IlvCoordinate &)
	Sets the start point of the segment. More...

Additional Inherited Members
Static Public Member Functions inherited from IlvMapGeometry
static IlvClassInfo *	ClassInfo ()
	Returns the class info. More...
Protected Member Functions inherited from IlvMapSegment
	IlvMapSegment ()
	Initializes a new IlvMapSegment instance.
Protected Member Functions inherited from IlvMapCurve
	IlvMapCurve ()
	Initializes a new, empty, curve.
Protected Member Functions inherited from IlvMapGeometry
	IlvMapGeometry ()
	Constructor. More...

Detailed Description

This class defines a circular arc segment.

Library: ilvmaps

An IlvMapArcSegment is a circular arc defined by three control points called the start point, the intermediate point and the end point.

The instances of this class can be rendered by an IlvDefaultFeatureRenderer or by an IlvDefaultCurveRenderer.

Constructor & Destructor Documentation

IlvMapArcSegment() [1/2]

IlvMapArcSegment::IlvMapArcSegment

(

const IlvMapArcSegment &

source

)

Initializes a new arc segment by copying an existing one.

Parameters

source

The source arc segment.

IlvMapArcSegment() [2/2]

IlvMapArcSegment::IlvMapArcSegment	(	const IlvCoordinate &	start,
		const IlvCoordinate &	intermediate,
		const IlvCoordinate &	end
	)

Initializes a new arc segment that goes through three points.

Parameters

start	The first point.
intermediate	The middle point.
end	The end point.

Member Function Documentation

copy()

virtual IlvMapGeometry* IlvMapArcSegment::copy ( ) const

virtual

Returns a copy of the object.

Returns

An IlvMapGeometry that must be deleted by the user.

Implements IlvMapSegment.

getClassInfo()

virtual IlvClassInfo* IlvMapArcSegment::getClassInfo ( ) const

virtual

Returns the IlvClassInfo of the instance.

Returns

An IlvClassInfo that should not be modified nor deleted.

Implements IlvMapCurve.

getEndPoint()

virtual const IlvCoordinate& IlvMapArcSegment::getEndPoint ( ) const

virtual

Returns the end point of the segment.

Returns

The end point.

Implements IlvMapSegment.

getHorizontalIntersectionCount()

virtual IlUInt IlvMapArcSegment::getHorizontalIntersectionCount ( const IlvCoordinate &  point ) const

virtual

Returns the number of intersections between this segment and an horizontal half line.

This function is used for point inclusion tests of IlvMapRing.

Parameters

point

The point at the right end of the horizontal half line.

Returns

The number of intersections between the point and this segment. Tangent intersections should be counted as: 1 if the point is on the segment, 2 if the point is not on the segment. If the point is on the segment where the tangent is not horizontal, the intersection should not be counted.

Implements IlvMapSegment.

getIntermediatePoint()

const IlvCoordinate& IlvMapArcSegment::getIntermediatePoint

(

)

const

Returns the intermediate point of the arc.

Returns

The intermediate control point.

getStartPoint()

virtual const IlvCoordinate& IlvMapArcSegment::getStartPoint ( ) const

virtual

Returns the start point of the segment.

Returns

The start point.

Implements IlvMapSegment.

getSubElement()

virtual const IlvMapGeometry* IlvMapArcSegment::getSubElement ( IlUInt  index ) const

virtual

Returns a sub element of a collection geometry.

Parameters

index

The index of the sub-geometry to be retrieved.

Returns

The sub element of index index if the geometry is a collection or 0 if it is not.

Implements IlvMapGeometry.

getSubElementCount()

virtual IlUInt IlvMapArcSegment::getSubElementCount ( ) const

virtual

Returns the number of elements contained in the geometry if the geometry is a collection.

Returns

The number of elements contained in the geometry if the geometry is a collection. If it is not, this method returns 0.

Implements IlvMapGeometry.

isCollection()

virtual IlBoolean IlvMapArcSegment::isCollection ( ) const

virtual

Checks if this geometry is a collection of other geometries.

The composite geometries predefined in Rogue Wave Views Maps are: IlvMapGeometryCollection, IlvMapMultiPoint, IlvMapSegmentString and its subclasses, IlvMapMultiCurve and IlvMapMultiArea.

Returns

IlTrue if the geometry is a collection of other geometries.

Implements IlvMapGeometry.

setEndPoint()

virtual void IlvMapArcSegment::setEndPoint ( const IlvCoordinate &  end )

virtual

Sets the end point of the segment.

Parameters

end	The end point.

Implements IlvMapSegment.

setIntermediatePoint()

void IlvMapArcSegment::setIntermediatePoint

(

const IlvCoordinate &

intermediate

)

Sets the intermediate point of the arc.

Parameters

intermediate

The intermediate point.

setStartPoint()

virtual void IlvMapArcSegment::setStartPoint ( const IlvCoordinate &  start )

virtual

Sets the start point of the segment.

Parameters

start

The start point.

Implements IlvMapSegment.