geos::geomgraph::DirectedEdge Class Reference

A directed EdgeEnd. More...

#include <DirectedEdge.h>

Inheritance diagram for geos::geomgraph::DirectedEdge:

Collaboration diagram for geos::geomgraph::DirectedEdge:

Public Member Functions
	DirectedEdge (Edge *newEdge, bool newIsForward)
void	setInResult (bool newIsInResult)
bool	isInResult ()
bool	isVisited ()
void	setVisited (bool newIsVisited)
void	setEdgeRing (EdgeRing *newEdgeRing)
EdgeRing *	getEdgeRing ()
void	setMinEdgeRing (EdgeRing *newMinEdgeRing)
EdgeRing *	getMinEdgeRing ()
int	getDepth (int position)
void	setDepth (int position, int newDepth)
int	getDepthDelta () const
void	setVisitedEdge (bool newIsVisited)
DirectedEdge *	getSym ()
	Each Edge gives rise to a pair of symmetric DirectedEdges, in opposite directions. More...
bool	isForward ()
void	setSym (DirectedEdge *de)
DirectedEdge *	getNext ()
void	setNext (DirectedEdge *newNext)
DirectedEdge *	getNextMin ()
void	setNextMin (DirectedEdge *newNextMin)
bool	isLineEdge ()
	Tells wheter this edge is a Line. More...
bool	isInteriorAreaEdge ()
	Tells wheter this edge is an Area. More...
void	setEdgeDepths (int position, int newDepth)
	Set both edge depths. More...
std::string	print () const override
std::string	printEdge ()
Public Member Functions inherited from geos::geomgraph::EdgeEnd
	EdgeEnd ()
virtual	~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 void	computeLabel (const algorithm::BoundaryNodeRule &bnr)

Static Public Member Functions
static int	depthFactor (geom::Location currLocation, geom::Location nextLocation)
	Computes the factor for the change in depth when moving from one location to another. E.g. if crossing from the INTERIOR to the EXTERIOR the depth decreases, so the factor is -1. More...

Protected Attributes
bool	isForwardVar
Protected Attributes inherited from geos::geomgraph::EdgeEnd
Edge *	edge
Label	label

Private Member Functions
void	computeDirectedLabel ()
	Compute the label in the appropriate orientation for this DirEdge. More...

Private Attributes
bool	isInResultVar
bool	isVisitedVar
DirectedEdge *	sym
	the symmetric edge More...
DirectedEdge *	next
	the next edge in the edge ring for the polygon containing this edge More...
DirectedEdge *	nextMin
	the next edge in the MinimalEdgeRing that contains this edge More...
EdgeRing *	edgeRing
	the EdgeRing that this edge is part of More...
EdgeRing *	minEdgeRing
	the MinimalEdgeRing that this edge is part of More...
int	depth [3]
	The depth of each side (position) of this edge. The 0 element of the array is never used. More...

Additional Inherited Members
Protected Member Functions inherited from geos::geomgraph::EdgeEnd
	EdgeEnd (Edge *newEdge)
virtual void	init (const geom::Coordinate &newP0, const geom::Coordinate &newP1)

Detailed Description

A directed EdgeEnd.

Definition at line 45 of file geomgraph/DirectedEdge.h.

Constructor & Destructor Documentation

geos::geomgraph::DirectedEdge::DirectedEdge	(	Edge *	newEdge,
		bool	newIsForward
	)

Member Function Documentation

void geos::geomgraph::DirectedEdge::computeDirectedLabel ( )

private

Compute the label in the appropriate orientation for this DirEdge.

static int geos::geomgraph::DirectedEdge::depthFactor ( geom::Location  currLocation, geom::Location  nextLocation  )

static

Computes the factor for the change in depth when moving from one location to another. E.g. if crossing from the INTERIOR to the EXTERIOR the depth decreases, so the factor is -1.

int geos::geomgraph::DirectedEdge::getDepth

(

int

position

)

int geos::geomgraph::DirectedEdge::getDepthDelta

(

)

const

EdgeRing* geos::geomgraph::DirectedEdge::getEdgeRing

(

)

EdgeRing* geos::geomgraph::DirectedEdge::getMinEdgeRing

(

)

DirectedEdge* geos::geomgraph::DirectedEdge::getNext

(

)

DirectedEdge* geos::geomgraph::DirectedEdge::getNextMin

(

)

DirectedEdge* geos::geomgraph::DirectedEdge::getSym

(

)

Each Edge gives rise to a pair of symmetric DirectedEdges, in opposite directions.

Returns

the DirectedEdge for the same Edge but in the opposite direction

bool geos::geomgraph::DirectedEdge::isForward

(

)

bool geos::geomgraph::DirectedEdge::isInResult

(

)

bool geos::geomgraph::DirectedEdge::isInteriorAreaEdge

(

)

Tells wheter this edge is an Area.

This is an interior Area edge if

• its label is an Area label for both Geometries
• and for each Geometry both sides are in the interior.

Returns

true if this is an interior Area edge

bool geos::geomgraph::DirectedEdge::isLineEdge

(

)

Tells wheter this edge is a Line.

This edge is a line edge if

• at least one of the labels is a line label
• any labels which are not line labels have all Locations = EXTERIOR

bool geos::geomgraph::DirectedEdge::isVisited

(

)

std::string geos::geomgraph::DirectedEdge::print ( ) const

overridevirtual

Reimplemented from geos::geomgraph::EdgeEnd.

std::string geos::geomgraph::DirectedEdge::printEdge

(

)

void geos::geomgraph::DirectedEdge::setDepth	(	int	position,
		int	newDepth
	)

void geos::geomgraph::DirectedEdge::setEdgeDepths	(	int	position,
		int	newDepth
	)

Set both edge depths.

One depth for a given side is provided. The other is computed depending on the Location transition and the depthDelta of the edge.

void geos::geomgraph::DirectedEdge::setEdgeRing

(

EdgeRing *

newEdgeRing

)

void geos::geomgraph::DirectedEdge::setInResult

(

bool

newIsInResult

)

void geos::geomgraph::DirectedEdge::setMinEdgeRing

(

EdgeRing *

newMinEdgeRing

)

void geos::geomgraph::DirectedEdge::setNext

(

DirectedEdge *

newNext

)

void geos::geomgraph::DirectedEdge::setNextMin

(

DirectedEdge *

newNextMin

)

void geos::geomgraph::DirectedEdge::setSym

(

DirectedEdge *

de

)

void geos::geomgraph::DirectedEdge::setVisited

(

bool

newIsVisited

)

void geos::geomgraph::DirectedEdge::setVisitedEdge

(

bool

newIsVisited

)

Marks both DirectedEdges attached to a given Edge.

This is used for edges corresponding to lines, which will only appear oriented in a single direction in the result.

Member Data Documentation

int geos::geomgraph::DirectedEdge::depth[3]

private

The depth of each side (position) of this edge. The 0 element of the array is never used.

Definition at line 179 of file geomgraph/DirectedEdge.h.

EdgeRing* geos::geomgraph::DirectedEdge::edgeRing

private

the EdgeRing that this edge is part of

Definition at line 170 of file geomgraph/DirectedEdge.h.

bool geos::geomgraph::DirectedEdge::isForwardVar

protected

Definition at line 152 of file geomgraph/DirectedEdge.h.

bool geos::geomgraph::DirectedEdge::isInResultVar

private

Definition at line 156 of file geomgraph/DirectedEdge.h.

bool geos::geomgraph::DirectedEdge::isVisitedVar

private

Definition at line 158 of file geomgraph/DirectedEdge.h.

EdgeRing* geos::geomgraph::DirectedEdge::minEdgeRing

private

the MinimalEdgeRing that this edge is part of

Definition at line 173 of file geomgraph/DirectedEdge.h.

DirectedEdge* geos::geomgraph::DirectedEdge::next

private

the next edge in the edge ring for the polygon containing this edge

Definition at line 164 of file geomgraph/DirectedEdge.h.

DirectedEdge* geos::geomgraph::DirectedEdge::nextMin

private

the next edge in the MinimalEdgeRing that contains this edge

Definition at line 167 of file geomgraph/DirectedEdge.h.

DirectedEdge* geos::geomgraph::DirectedEdge::sym

private

the symmetric edge

Definition at line 161 of file geomgraph/DirectedEdge.h.

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

• geomgraph/DirectedEdge.h