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...

Inheritance diagram for IlvMapSegment:

List of all members.

Public Member Functions
virtual IlvMapGeometry *	copy () const =0
	Returns a copy of the object.
virtual const IlvCoordinate &	getEndPoint () const =0
	Returns the end point of the segment.
virtual IlUInt	getHorizontalIntersectionCount (const IlvCoordinate &point) const =0
virtual const IlvCoordinate &	getStartPoint () const =0
	Returns the start point of the segment.
virtual void	setEndPoint (const IlvCoordinate &end)=0
	Sets the end point of the segment.
virtual void	setStartPoint (const IlvCoordinate &start)=0
	Sets the start point of the segment.
Protected Member Functions
	IlvMapSegment ()
	Constructor.

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.

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

Constructor & Destructor Documentation

IlvMapSegment::IlvMapSegment ( ) [protected]

Constructor.

The constructor of this abstract class is protected.

Member Function Documentation

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

virtual const IlvCoordinate& IlvMapSegment::getEndPoint ( ) const [pure virtual]

Returns the end point of the segment.

Returns:: The end point.

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

virtual IlUInt IlvMapSegment::getHorizontalIntersectionCount ( const IlvCoordinate & point ) const [pure virtual]

Returns the number of intersections between an horizontal half line defined by its right extremity point and the segment. This function is used for point inclusion tests of IlvMapRing.

Parameters:

point

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

Returns:: The number of intersections between the point and the 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 IlvMapArcSegment, IlvMapArcString, IlvMapCurveString, IlvMapLinearSegment, and IlvMapLineString.

virtual const IlvCoordinate& IlvMapSegment::getStartPoint ( ) const [pure virtual]

Returns the start point of the segment.