Package org.openstreetmap.josm.actions

Class JoinAreasAction.WayTraverser

java.lang.Object

org.openstreetmap.josm.actions.JoinAreasAction.WayTraverser

Enclosing class:

JoinAreasAction

private static class JoinAreasAction.WayTraverser
extends java.lang.Object

This helper class implements algorithm traversing through connected ways. Assumes you are going in clockwise orientation.

Field Summary

Fields

Modifier and Type	Field	Description
private java.util.Set<JoinAreasAction.WayInPolygon>	availableWays	Set of JoinAreasAction.WayInPolygon to be joined by walk algorithm
private JoinAreasAction.WayInPolygon	lastWay	Current state of walk algorithm
private boolean	lastWayReverse	Direction of current way

Constructor Summary

Constructors

Constructor	Description
WayTraverser(java.util.Collection<JoinAreasAction.WayInPolygon> ways)	Constructor

Method Summary

Modifier and Type	Method	Description
private static double	getAngle(Node n1, Node n2, Node n3)	Returns oriented angle (N1N2, N1N3) in range [0; 2*Math.PI[
private Node	getHeadNode()	Walking through JoinAreasAction.WayInPolygon segments, head node is the current position
private Node	getPrevNode()	Node just before head node.
JoinAreasAction.WayInPolygon	leftComingWay()	Search for another way coming to the same head node at left side from last way.
void	removeWay(JoinAreasAction.WayInPolygon way)	Remove a single way from available ways
void	removeWays(java.util.Collection<JoinAreasAction.WayInPolygon> ways)	Remove ways from available ways
void	setStartWay(JoinAreasAction.WayInPolygon way)	Reset walk algorithm to a new start point
JoinAreasAction.WayInPolygon	startNewWay()	Reset walk algorithm to a new start point.
JoinAreasAction.WayInPolygon	walk()	Get the next way creating a clockwise path, ensure it is the most right way.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

availableWays

private final java.util.Set<JoinAreasAction.WayInPolygon> availableWays

Set of JoinAreasAction.WayInPolygon to be joined by walk algorithm

lastWay

private JoinAreasAction.WayInPolygon lastWay

Current state of walk algorithm

lastWayReverse

private boolean lastWayReverse

Direction of current way

Constructor Detail

WayTraverser

WayTraverser(java.util.Collection<JoinAreasAction.WayInPolygon> ways)

Constructor

Parameters:

ways - available ways

Method Detail

removeWays

public void removeWays(java.util.Collection<JoinAreasAction.WayInPolygon> ways)

Remove ways from available ways

Parameters:

ways - Collection of WayInPolygon

removeWay

public void removeWay(JoinAreasAction.WayInPolygon way)

Remove a single way from available ways

Parameters:

way - WayInPolygon

setStartWay

public void setStartWay(JoinAreasAction.WayInPolygon way)

Reset walk algorithm to a new start point

Parameters:

way - New start point

startNewWay

public JoinAreasAction.WayInPolygon startNewWay()

Reset walk algorithm to a new start point.

Returns:

The new start point or null if no available way remains

getHeadNode

private Node getHeadNode()

Walking through JoinAreasAction.WayInPolygon segments, head node is the current position

Returns:

Head node

getPrevNode

private Node getPrevNode()

Node just before head node.

Returns:

Previous node

getAngle

private static double getAngle(Node n1,
                               Node n2,
                               Node n3)

Returns oriented angle (N1N2, N1N3) in range [0; 2*Math.PI[

Parameters:

n1 - first node

n2 - second node

n3 - third node

Returns:

oriented angle (N1N2, N1N3) in range [0; 2*Math.PI[

walk

public JoinAreasAction.WayInPolygon walk()

Get the next way creating a clockwise path, ensure it is the most right way. #7959

Returns:

The next way.

leftComingWay

public JoinAreasAction.WayInPolygon leftComingWay()

Search for another way coming to the same head node at left side from last way. #9951

Returns:

left way or null if none found