Package org.opentrafficsim.road.gtu.lane.perception.categories.neighbors

Class NeighborsUtil

java.lang.Object

org.opentrafficsim.road.gtu.lane.perception.categories.neighbors.NeighborsUtil

public final class NeighborsUtil
extends Object

Utilities to perceive neighbors.

Copyright (c) 2013-2020 Delft University of Technology, PO Box 5, 2600 AA, Delft, the Netherlands. All rights reserved.
BSD-style license. See OpenTrafficSim License.

Version:

$Revision$, $LastChangedDate$, by $Author$, initial version 19 okt. 2018

Author:

Alexander Verbraeck, Peter Knoppers, Wouter Schakel

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	NeighborsUtil.DistanceGTU	GTU at a distance, as preliminary info towards perceiving it.

Method Summary

Modifier and Type	Method	Description
static SortedSet<NeighborsUtil.DistanceGTU>	getFirstDownstreamGTUs(LaneStructureRecord startRecord, RelativePosition egoRelativePosition, RelativePosition egoFrontPosition, RelativePosition.TYPE otherRelativePosition, Time now)	Returns a set of first leaders per branch, relative to given relative position.
static SortedSet<NeighborsUtil.DistanceGTU>	getFirstUpstreamGTUs(LaneStructureRecord startRecord, RelativePosition egoRelativePosition, RelativePosition egoRearPosition, RelativePosition.TYPE otherRelativePosition, Time now)	Returns a set of first followers per branch, relative to given relative position.
static SortedSet<HeadwayGTU>	perceive(SortedSet<NeighborsUtil.DistanceGTU> base, HeadwayGtuType headwayGtuType, LaneBasedGTU perceivingGtu, boolean downstream)	Translation from a set of DistanceGTU's, to a sorted set of HeadwayGTU's.

Methods inherited from class java.lang.Object

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

Method Detail

getFirstDownstreamGTUs

public static SortedSet<NeighborsUtil.DistanceGTU> getFirstDownstreamGTUs(LaneStructureRecord startRecord,
                                                                          RelativePosition egoRelativePosition,
                                                                          RelativePosition egoFrontPosition,
                                                                          RelativePosition.TYPE otherRelativePosition,
                                                                          Time now)
                                                                   throws GTUException,
                                                                          ParameterException

Returns a set of first leaders per branch, relative to given relative position. Helper method to find first leaders and GTU's alongside.

Parameters:

startRecord - LaneStructureRecord; lane structure record to start the search from

egoRelativePosition - RelativePosition; position of GTU to start search from

egoFrontPosition - RelativePosition; front position of GTU to determine headway

otherRelativePosition - RelativePosition.TYPE; position of other GTU that has to be downstream

now - Time; current time

Returns:

set of first leaders per branch

Throws:

GTUException - if the GTU was not initialized

ParameterException - if a parameter was not present or out of bounds

getFirstUpstreamGTUs

public static SortedSet<NeighborsUtil.DistanceGTU> getFirstUpstreamGTUs(LaneStructureRecord startRecord,
                                                                        RelativePosition egoRelativePosition,
                                                                        RelativePosition egoRearPosition,
                                                                        RelativePosition.TYPE otherRelativePosition,
                                                                        Time now)
                                                                 throws GTUException,
                                                                        ParameterException

Returns a set of first followers per branch, relative to given relative position. Helper method to find first followers and GTU's alongside.

Parameters:

startRecord - LaneStructureRecord; lane structure record to start the search from

egoRelativePosition - RelativePosition; position of GTU to start search from

egoRearPosition - RelativePosition; rear position of GTU to determine headway

otherRelativePosition - RelativePosition.TYPE; type of position of other GTU that has to be upstream

now - Time; current time

Returns:

set of first followers per branch

Throws:

GTUException - if the GTU was not initialized

ParameterException - if a parameter was not present or out of bounds

perceive

public static SortedSet<HeadwayGTU> perceive(SortedSet<NeighborsUtil.DistanceGTU> base,
                                             HeadwayGtuType headwayGtuType,
                                             LaneBasedGTU perceivingGtu,
                                             boolean downstream)

Translation from a set of DistanceGTU's, to a sorted set of HeadwayGTU's. This bridges the gap between a raw network search, and the perceived result.

Parameters:

base - SortedSet<DistanceGTU>; base set of GTU's at distance

headwayGtuType - HeadwayGtuType; headway type for perceived GTU's

perceivingGtu - LaneBasedGTU; perceiving GTU

downstream - boolean; whether the GTU's are downstream

Returns:

SortedSet<HeadwayGTU>; set of perceived GTU's