geos::geomgraph::Node Class Reference

The node component of a geometry graph. More...

#include <Node.h>

Inheritance diagram for geos::geomgraph::Node:

Public Member Functions
	Node (const geom::Coordinate &newCoord, EdgeEndStar *newEdges)
virtual const geom::Coordinate &	getCoordinate () const
virtual EdgeEndStar *	getEdges ()
bool	isIsolated () const override
virtual void	add (EdgeEnd *e)
	Add the edge to the list of edges at this node.
virtual void	mergeLabel (const Node &n)
virtual void	mergeLabel (const Label &label2)
	To merge labels for two nodes, the merged location for each LabelElement is computed. More...
virtual void	setLabel (uint8_t argIndex, geom::Location onLocation)
virtual void	setLabelBoundary (uint8_t argIndex)
	Updates the label of a node to BOUNDARY, obeying the mod-2 boundaryDetermination rule.
virtual geom::Location	computeMergedLocation (const Label &label2, uint8_t eltIndex)
virtual std::string	print ()
virtual const std::vector< double > &	getZ () const
virtual void	addZ (double)
virtual bool	isIncidentEdgeInResult () const
	Tests whether any incident edge is flagged as being in the result. More...
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 p_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 p_isVisited)
virtual bool	isIsolated () const =0
virtual void	updateIM (geom::IntersectionMatrix &im)

Protected Member Functions
void	testInvariant () const
void	computeIM (geom::IntersectionMatrix &) override
	Basic nodes do not compute IMs. More...
virtual void	computeIM (geom::IntersectionMatrix &im)=0

Protected Attributes
geom::Coordinate	coord
EdgeEndStar *	edges
Protected Attributes inherited from geos::geomgraph::GraphComponent
Label	label

Friends
std::ostream &	operator<< (std::ostream &os, const Node &node)

Detailed Description

The node component of a geometry graph.

Member Function Documentation

computeIM()

void geos::geomgraph::Node::computeIM ( geom::IntersectionMatrix &  )

inlineoverrideprotectedvirtual

Basic nodes do not compute IMs.

Implements geos::geomgraph::GraphComponent.

Reimplemented in geos::operation::relate::RelateNode.

computeMergedLocation()

virtual geom::Location geos::geomgraph::Node::computeMergedLocation ( const Label &  label2, uint8_t  eltIndex  )

virtual

The location for a given eltIndex for a node will be one of { null, INTERIOR, BOUNDARY }. A node may be on both the boundary and the interior of a geometry; in this case, the rule is that the node is considered to be in the boundary. The merged location is the maximum of the two input values.

isIncidentEdgeInResult()

virtual bool geos::geomgraph::Node::isIncidentEdgeInResult ( ) const

virtual

Tests whether any incident edge is flagged as being in the result.

This test can be used to determine if the node is in the result, since if any incident edge is in the result, the node must be in the result as well.

Returns

true if any indicident edge in the in the result

isIsolated()

bool geos::geomgraph::Node::isIsolated ( ) const

overridevirtual

Implements geos::geomgraph::GraphComponent.

mergeLabel()

virtual void geos::geomgraph::Node::mergeLabel ( const Label &  label2 )

virtual

To merge labels for two nodes, the merged location for each LabelElement is computed.

The location for the corresponding node LabelElement is set to the result, as long as the location is non-null.

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

• geomgraph/Node.h