geos::operation::linemerge::LineMergeDirectedEdge Class Reference

A DirectedEdge of a LineMergeGraph. More...

#include <LineMergeDirectedEdge.h>

Inheritance diagram for geos::operation::linemerge::LineMergeDirectedEdge:

Public Member Functions
	LineMergeDirectedEdge (planargraph::Node *from, planargraph::Node *to, const geom::Coordinate &directionPt, bool edgeDirection)
	Constructs a LineMergeDirectedEdge connecting the from node to the to node.
LineMergeDirectedEdge *	getNext (bool checkDirection=false)
	Returns the directed edge that starts at this directed edge's end point, or null if there are zero or multiple directed edges starting there.
Public Member Functions inherited from geos::planargraph::DirectedEdge
	DirectedEdge (Node *newFrom, Node *newTo, const geom::Coordinate &directionPt, bool newEdgeDirection)
	Constructs a DirectedEdge connecting the from node to the to node.
Edge *	getEdge () const
	Returns this DirectedEdge's parent Edge, or null if it has none.
void	setEdge (Edge *newParentEdge)
	Associates this DirectedEdge with an Edge (possibly null, indicating no associated Edge).
int	getQuadrant () const
	Returns 0, 1, 2, or 3, indicating the quadrant in which this DirectedEdge's orientation lies.
const geom::Coordinate &	getDirectionPt () const
	Returns a point to which an imaginary line is drawn from the from-node to specify this DirectedEdge's orientation.
bool	getEdgeDirection () const
	Returns whether the direction of the parent Edge (if any) is the same as that of this Directed Edge.
Node *	getFromNode () const
	Returns the node from which this DirectedEdge leaves.
Node *	getToNode () const
	Returns the node to which this DirectedEdge goes.
geom::Coordinate &	getCoordinate () const
	Returns the coordinate of the from-node.
double	getAngle () const
	Returns the angle that the start of this DirectedEdge makes with the positive x-axis, in radians.
DirectedEdge *	getSym () const
	Returns the symmetric DirectedEdge – the other DirectedEdge associated with this DirectedEdge's parent Edge.
void	setSym (DirectedEdge *newSym)
	Sets this DirectedEdge's symmetric DirectedEdge, which runs in the opposite direction.
int	compareTo (const DirectedEdge *obj) const
	Returns 1 if this DirectedEdge has a greater angle with the positive x-axis than b", 0 if the DirectedEdges are collinear, and -1 otherwise.
int	compareDirection (const DirectedEdge *e) const
	Returns 1 if this DirectedEdge has a greater angle with the positive x-axis than b", 0 if the DirectedEdges are collinear, and -1 otherwise.
std::string	print () const
	Prints a detailed string representation of this DirectedEdge to the given PrintStream.
Public Member Functions inherited from geos::planargraph::GraphComponent
virtual bool	isVisited () const
	Tests if a component has been visited during the course of a graph algorithm.
virtual void	setVisited (bool p_isVisited)
	Sets the visited flag for this component.
virtual bool	isMarked () const
	Tests if a component has been marked at some point during the processing involving this graph.
virtual void	setMarked (bool p_isMarked)
	Sets the marked flag for this component.

Additional Inherited Members
Public Types inherited from geos::planargraph::DirectedEdge
typedef std::list< DirectedEdge * >	NonConstList
typedef std::list< const DirectedEdge * >	ConstList
typedef std::vector< DirectedEdge * >	NonConstVect
typedef std::vector< const DirectedEdge * >	ConstVect
typedef std::vector< DirectedEdge * >	Vect
Static Public Member Functions inherited from geos::planargraph::DirectedEdge
static std::vector< Edge * > *	toEdges (std::vector< DirectedEdge * > &dirEdges)
	Returns a List containing the parent Edge (possibly null) for each of the given DirectedEdges.
static void	toEdges (std::vector< DirectedEdge * > &dirEdges, std::vector< Edge * > &parentEdges)
	Add parent Edge (possibly null) of each of the given DirectedEdges to the given parentEdges vector.
Static Public Member Functions inherited from geos::planargraph::GraphComponent
template<typename T >
static void	setVisited (T start, T end, bool visited)
	Sets the Visited state for the elements of a container, from start to end iterator.
template<typename T >
static void	setVisitedMap (T start, T end, bool visited)
	Sets the Visited state for the values of each map container element, from start to end iterator.
template<typename T >
static void	setMarked (T start, T end, bool marked)
	Sets the Marked state for the elements of a container, from start to end iterator.
template<typename T >
static void	setMarkedMap (T start, T end, bool marked)
	Sets the Marked state for the values of each map container element, from start to end iterator.
Protected Attributes inherited from geos::planargraph::DirectedEdge
Edge *	parentEdge
Node *	from
Node *	to
geom::Coordinate	p0
geom::Coordinate	p1
DirectedEdge *	sym
bool	edgeDirection
int	quadrant
double	angle
Protected Attributes inherited from geos::planargraph::GraphComponent
bool	isMarkedVar
	Variable holding ''marked'' status.
bool	isVisitedVar
	Variable holding ''visited'' status.

Detailed Description

A DirectedEdge of a LineMergeGraph.

Constructor & Destructor Documentation

LineMergeDirectedEdge()

geos::operation::linemerge::LineMergeDirectedEdge::LineMergeDirectedEdge	(	planargraph::Node *	from,
		planargraph::Node *	to,
		const geom::Coordinate &	directionPt,
		bool	edgeDirection
	)

Constructs a LineMergeDirectedEdge connecting the from node to the to node.

Parameters

from	from node
to	to node
directionPt	specifies this DirectedEdge's direction (given by an imaginary line from the from node to directionPt)
edgeDirection	whether this DirectedEdge's direction is the same as or opposite to that of the parent Edge (if any)

Member Function Documentation

getNext()

LineMergeDirectedEdge * geos::operation::linemerge::LineMergeDirectedEdge::getNext

(

bool

checkDirection = false

)

Returns the directed edge that starts at this directed edge's end point, or null if there are zero or multiple directed edges starting there.

Parameters

checkDirection

only consider directed edges with same direction as parent edge

Returns

the directed edge

null if there are zero or multiple directed edges starting there

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

• LineMergeDirectedEdge.h