geos::operation::relate::EdgeEndBundle Class Reference

A collection of geomgraph::EdgeEnd objects which originate at the same point and have the same direction. More...

#include <EdgeEndBundle.h>

Inheritance diagram for geos::operation::relate::EdgeEndBundle:

Public Member Functions
	EdgeEndBundle (geomgraph::EdgeEnd *e)
std::vector< geomgraph::EdgeEnd * > *	getEdgeEnds ()
void	insert (geomgraph::EdgeEnd *e)
void	computeLabel (const algorithm::BoundaryNodeRule &bnr)
void	updateIM (geom::IntersectionMatrix &im)
	Update the IM with the contribution for the computed label for the EdgeStubs.
std::string	print ()
Public Member Functions inherited from geos::geomgraph::EdgeEnd
	EdgeEnd (Edge *newEdge, const geom::Coordinate &newP0, const geom::Coordinate &newP1, const Label &newLabel)
	EdgeEnd (Edge *newEdge, const geom::Coordinate &newP0, const geom::Coordinate &newP1)
Edge *	getEdge ()
Label &	getLabel ()
const Label &	getLabel () const
virtual geom::Coordinate &	getCoordinate ()
const geom::Coordinate &	getCoordinate () const
virtual geom::Coordinate &	getDirectedCoordinate ()
virtual int	getQuadrant ()
virtual double	getDx ()
virtual double	getDy ()
virtual void	setNode (Node *newNode)
virtual Node *	getNode ()
virtual int	compareTo (const EdgeEnd *e) const
virtual int	compareDirection (const EdgeEnd *e) const
virtual std::string	print () const

Protected Member Functions
void	computeLabelOn (int geomIndex, const algorithm::BoundaryNodeRule &boundaryNodeRule)
void	computeLabelSides (int geomIndex)
void	computeLabelSide (int geomIndex, int side)
Protected Member Functions inherited from geos::geomgraph::EdgeEnd
	EdgeEnd (Edge *newEdge)
virtual void	init (const geom::Coordinate &newP0, const geom::Coordinate &newP1)

Protected Attributes
std::vector< geomgraph::EdgeEnd * > *	edgeEnds
Protected Attributes inherited from geos::geomgraph::EdgeEnd
Edge *	edge
Label	label

Detailed Description

A collection of geomgraph::EdgeEnd objects which originate at the same point and have the same direction.

Member Function Documentation

computeLabel()

void geos::operation::relate::EdgeEndBundle::computeLabel ( const algorithm::BoundaryNodeRule & bnr )

virtual

Reimplemented from geos::geomgraph::EdgeEnd.

computeLabelOn()

void geos::operation::relate::EdgeEndBundle::computeLabelOn ( int geomIndex, const algorithm::BoundaryNodeRule & boundaryNodeRule )

protected

Compute the overall ON location for the list of EdgeStubs.

(This is essentially equivalent to computing the self-overlay of a single Geometry)

edgeStubs can be either on the boundary (eg Polygon edge) OR in the interior (e.g. segment of a LineString) of their parent Geometry.

In addition, GeometryCollections use a algorithm::BoundaryNodeRule to determine whether a segment is on the boundary or not.

Finally, in GeometryCollections it can occur that an edge is both on the boundary and in the interior (e.g. a LineString segment lying on top of a Polygon edge.) In this case the Boundary is given precendence.

These observations result in the following rules for computing the ON location:

• if there are an odd number of Bdy edges, the attribute is Bdy
• if there are an even number >= 2 of Bdy edges, the attribute is Int
• if there are any Int edges, the attribute is Int
• otherwise, the attribute is NULL.

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

• EdgeEndBundle.h