geos::geomgraph::Edge Class Reference

#include <Edge.h>

Inheritance diagram for geos::geomgraph::Edge:

Public Member Functions
void	testInvariant () const
	Edge (geom::CoordinateSequence *newPts, const Label &newLabel)
	Takes ownership of CoordinateSequence.
	Edge (geom::CoordinateSequence *newPts)
	Takes ownership of CoordinateSequence.
virtual int	getNumPoints () const
virtual void	setName (const std::string &newName)
virtual const geom::CoordinateSequence *	getCoordinates () const
virtual const geom::Coordinate &	getCoordinate (int i) const
virtual const geom::Coordinate &	getCoordinate () const
virtual Depth &	getDepth ()
virtual int	getDepthDelta () const
	The depthDelta is the change in depth as an edge is crossed from R to L.
virtual void	setDepthDelta (int newDepthDelta)
virtual int	getMaximumSegmentIndex () const
virtual EdgeIntersectionList &	getEdgeIntersectionList ()
virtual index::MonotoneChainEdge *	getMonotoneChainEdge ()
	Return this Edge's index::MonotoneChainEdge, ownership is retained by this object.
virtual bool	isClosed () const
virtual bool	isCollapsed () const
	An Edge is collapsed if it is an Area edge and it consists of two segments which are equal and opposite (eg a zero-width V).
virtual Edge *	getCollapsedEdge ()
virtual void	setIsolated (bool newIsIsolated)
virtual bool	isIsolated () const
virtual void	addIntersections (algorithm::LineIntersector *li, int segmentIndex, int geomIndex)
	Adds EdgeIntersections for one or both intersections found for a segment of an edge to the edge intersection list.
virtual void	addIntersection (algorithm::LineIntersector *li, int segmentIndex, int geomIndex, int intIndex)
	Add an EdgeIntersection for intersection intIndex.
virtual void	computeIM (geom::IntersectionMatrix &im)
	Update the IM with the contribution for this component.
virtual bool	isPointwiseEqual (const Edge *e) const
	return true if the coordinate sequences of the Edges are identical
virtual std::string	print () const
virtual std::string	printReverse () const
virtual bool	equals (const Edge &e) const
virtual bool	equals (const Edge *e) const
virtual geom::Envelope *	getEnvelope ()
Public Member Functions inherited from geos::geomgraph::GraphComponent
	GraphComponent (const Label &newLabel)
Label &	getLabel ()
const Label &	getLabel () const
void	setLabel (const Label &newLabel)
virtual void	setInResult (bool isInResult)
virtual bool	isInResult () const
virtual void	setCovered (bool isCovered)
virtual bool	isCovered () const
virtual bool	isCoveredSet () const
virtual bool	isVisited () const
virtual void	setVisited (bool isVisited)

Static Public Member Functions
static void	updateIM (const Label &lbl, geom::IntersectionMatrix &im)

Public Attributes
geom::CoordinateSequence *	pts
	Externally-set, owned by Edge. FIXME: refuse ownership.
EdgeIntersectionList	eiList

Friends
std::ostream &	operator<< (std::ostream &os, const Edge &el)

Additional Inherited Members
Protected Attributes inherited from geos::geomgraph::GraphComponent
Label	label

Detailed Description

The edge component of a geometry graph

Member Function Documentation

addIntersection()

virtual void geos::geomgraph::Edge::addIntersection ( algorithm::LineIntersector * li, int segmentIndex, int geomIndex, int intIndex )

virtual

Add an EdgeIntersection for intersection intIndex.

An intersection that falls exactly on a vertex of the edge is normalized to use the higher of the two possible segmentIndexes

computeIM()

virtual void geos::geomgraph::Edge::computeIM ( geom::IntersectionMatrix & im )

inlinevirtual

Update the IM with the contribution for this component.

A component only contributes if it has a labelling for both parent geometries

Implements geos::geomgraph::GraphComponent.

equals()

virtual bool geos::geomgraph::Edge::equals ( const Edge & e ) const

virtual

equals is defined to be:

e1 equals e2 iff the coordinates of e1 are the same or the reverse of the coordinates in e2

References Edge(), and equals().

Referenced by equals().

getDepthDelta()

virtual int geos::geomgraph::Edge::getDepthDelta ( ) const

inlinevirtual

The depthDelta is the change in depth as an edge is crossed from R to L.

Returns

the change in depth as the edge is crossed from R to L

isIsolated()

virtual bool geos::geomgraph::Edge::isIsolated ( ) const

inlinevirtual

Implements geos::geomgraph::GraphComponent.

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

• geomgraph/Edge.h