GEOS: geos::geomgraph::Node Class Reference

GEOS 3.5.0

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geos::geomgraph::Node Class Reference

`#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 ()
virtual bool | isIsolated () const
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 (int argIndex, int onLocation)
virtual void | setLabelBoundary (int argIndex)
| Updates the label of a node to BOUNDARY, obeying the mod-2 boundaryDetermination rule.
virtual int | computeMergedLocation (const Label &label2, int 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 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)
virtual void | updateIM (geom::IntersectionMatrix &im)

## Protected Member Functions
void | testInvariant () const
virtual void | computeIM (geom::IntersectionMatrix &)
| Basic nodes do not compute IMs.

## 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

virtual int geos::geomgraph::Node::computeMergedLocation | ( | const Label & | label2,
|  | int | 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.

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

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.

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

- geomgraph/Node.h