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

A planargraph::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)
LineMergeDirectedEdge * | getNext ()
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 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 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.
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

## Detailed Description

A planargraph::DirectedEdge of a LineMergeGraph.

## Constructor & Destructor Documentation

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

  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

LineMergeDirectedEdge* geos::operation::linemerge::LineMergeDirectedEdge::getNext | ( |  | ) |

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.

Returns

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

- LineMergeDirectedEdge.h