IlvMapSegment Class Reference

This abstract class is the base class for the geometries that describe a connected curve that has a start point and an end point. More...

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

Inheritance diagram for IlvMapSegment:

Public Member Functions
virtual IlvMapGeometry *	copy () const =0
	Returns a copy of the object. More...
virtual const IlvCoordinate &	getEndPoint () const =0
	Returns the end point of the segment. More...
virtual IlUInt	getHorizontalIntersectionCount (const IlvCoordinate &point) const =0
	Returns the number of intersections between this segment and an horizontal half line. More...
virtual const IlvCoordinate &	getStartPoint () const =0
	Returns the start point of the segment. More...
virtual void	setEndPoint (const IlvCoordinate &end)=0
	Sets the end point of the segment. More...
virtual void	setStartPoint (const IlvCoordinate &start)=0
	Sets the start point of the segment. More...
Public Member Functions inherited from IlvMapCurve
virtual IlvClassInfo *	getClassInfo () const =0
	Returns the IlvClassInfo of the instance. More...
Public Member Functions inherited from IlvMapGeometry
virtual const IlvMapGeometry *	getSubElement (IlUInt index) const =0
	Returns a sub element of a collection geometry. More...
virtual IlUInt	getSubElementCount () const =0
	Returns the number of elements contained in the geometry if the geometry is a collection. More...
virtual IlBoolean	isCollection () const =0
	Checks if this geometry is a collection of other geometries. More...

Protected Member Functions
	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...

Additional Inherited Members
Static Public Member Functions inherited from IlvMapGeometry
static IlvClassInfo *	ClassInfo ()
	Returns the class info. More...

Detailed Description

This abstract class is the base class for the geometries that describe a connected curve that has a start point and an end point.

Library: ilvmaps
The instances of the predefined subclasses IlvMapSegment can be rendered by an IlvDefaultFeatureRenderer or by an IlvDefaultCurveRenderer.

Member Function Documentation

copy()

virtual IlvMapGeometry* IlvMapSegment::copy ( ) const

pure virtual

Returns a copy of the object.

Returns

An IlvMapGeometry that must be deleted by the user.

Implements IlvMapCurve.

Implemented in IlvMapLineString, IlvMapSegmentString, IlvMapArcSegment, IlvMapArcString, IlvMapLinearSegment, and IlvMapCurveString.

getEndPoint()

virtual const IlvCoordinate& IlvMapSegment::getEndPoint ( ) const

pure virtual

Returns the end point of the segment.

Returns

The end point.

Implemented in IlvMapLineString, IlvMapSegmentString, IlvMapArcSegment, IlvMapArcString, IlvMapLinearSegment, and IlvMapCurveString.

getHorizontalIntersectionCount()

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

pure 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.

Implemented in IlvMapLineString, IlvMapArcSegment, IlvMapArcString, IlvMapLinearSegment, and IlvMapCurveString.

getStartPoint()

virtual const IlvCoordinate& IlvMapSegment::getStartPoint ( ) const

pure virtual

Returns the start point of the segment.

Returns

The start point.

Implemented in IlvMapLineString, IlvMapArcSegment, IlvMapSegmentString, IlvMapArcString, IlvMapLinearSegment, and IlvMapCurveString.

setEndPoint()

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

pure virtual

Sets the end point of the segment.

Parameters

end	The end point.

Implemented in IlvMapLineString, IlvMapSegmentString, IlvMapArcSegment, IlvMapArcString, IlvMapLinearSegment, and IlvMapCurveString.

setStartPoint()

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

pure virtual

Sets the start point of the segment.

Parameters

start

The start point.

Implemented in IlvMapLineString, IlvMapSegmentString, IlvMapArcSegment, IlvMapArcString, IlvMapLinearSegment, and IlvMapCurveString.