geos::geomgraph::Node Class Reference

#include <Node.h>

Inheritance diagram for geos::geomgraph::Node:
geos::geomgraph::GraphComponent geos::operation::relate::RelateNode

List of all members.

Public Member Functions

 Node (const geom::Coordinate &newCoord, EdgeEndStar *newEdges)
virtual const geom::CoordinategetCoordinate () const
virtual EdgeEndStargetEdges ()
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.
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.

Protected Member Functions

void testInvariant () const
virtual void computeIM (geom::IntersectionMatrix &)
 Basic nodes do not compute IMs.

Protected Attributes

geom::Coordinate coord
EdgeEndStaredges

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:

Generated on 2 Apr 2015 for GEOS by  doxygen 1.6.1