org.opentrafficsim.road.gtu.generator

Class GeneratorPositions

java.lang.Object

org.opentrafficsim.road.gtu.generator.GeneratorPositions

All Implemented Interfaces:

Locatable

public final class GeneratorPositions
extends Object
implements Locatable

Helper class for vehicle generation which can draw the next GTU position to try to place a GTU. If the GTU can not be placed, it should be included in a queue. This class requires the number of unplaced GTU's per lane, in order to appropriately divide traffic over the lanes.

Copyright (c) 2013-2019 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 22 dec. 2017

Author:

Alexander Verbraeck, Peter Knoppers, Wouter Schakel

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	GeneratorPositions.GeneratorLanePosition Class representing a vehicle generation lane, providing elementary information for randomly drawing links and lanes.
static class	GeneratorPositions.LaneBias Vehicle generation lateral bias.
static class	GeneratorPositions.LaneBiases Set of lane biases per GTU type.

Method Summary

Modifier and Type	Method and Description
static GeneratorPositions	create(Set<DirectedLanePosition> positions, StreamInterface stream) Create a GeneratorPositions object to draw positions from.
static GeneratorPositions	create(Set<DirectedLanePosition> positions, StreamInterface stream, GeneratorPositions.LaneBiases biases) Create a GeneratorPositions object to draw positions from.
static GeneratorPositions	create(Set<DirectedLanePosition> positions, StreamInterface stream, GeneratorPositions.LaneBiases biases, Map<CrossSectionLink,Double> linkWeights) Create a GeneratorPositions object to draw positions from.
static GeneratorPositions	create(Set<DirectedLanePosition> positions, StreamInterface stream, Map<CrossSectionLink,Double> linkWeights) Create a GeneratorPositions object to draw positions from.
GeneratorPositions.GeneratorLanePosition	draw(GTUType gtuType, Map<CrossSectionLink,Map<Integer,Integer>> unplaced, Speed desiredSpeed, Route route) Draw a new position to generate a GTU.
Set<GeneratorPositions.GeneratorLanePosition>	getAllPositions() Returns all underlying positions.
javax.media.j3d.Bounds	getBounds()
DirectedPoint	getLocation()
Speed	speedLimit(GTUType gtuType) Returns the speed limit for the given GTU type, prior to the GTU position being determined.

Methods inherited from class java.lang.Object

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

Method Detail

create

public static GeneratorPositions create(Set<DirectedLanePosition> positions,
                                        StreamInterface stream)

Create a GeneratorPositions object to draw positions from. The given positions are grouped per link. Lanes are drawn without bias. Each link receives a weight equal to the number of lanes.

Parameters:

positions - Set<DirectedLanePosition>; all considered positions, each lane is considered separately

stream - StreamInterface; stream for random numbers

Returns:

GeneratorPositions; object to draw positions from

create

public static GeneratorPositions create(Set<DirectedLanePosition> positions,
                                        StreamInterface stream,
                                        GeneratorPositions.LaneBiases biases)

Create a GeneratorPositions object to draw positions from. The given positions are grouped per link. Each link receives a weight equal to the number of lanes.

Parameters:

positions - Set<DirectedLanePosition>; all considered positions, each lane is considered separately

stream - StreamInterface; stream for random numbers

biases - LaneBiases; lane biases for GTU types

Returns:

GeneratorPositions; object to draw positions from

create

public static GeneratorPositions create(Set<DirectedLanePosition> positions,
                                        StreamInterface stream,
                                        Map<CrossSectionLink,Double> linkWeights)

Create a GeneratorPositions object to draw positions from. The given positions are grouped per link. Lanes are drawn without bias.

Parameters:

positions - Set<DirectedLanePosition>; all considered positions, each lane is considered separately

stream - StreamInterface; stream for random numbers

linkWeights - Map<CrossSectionLink, Double>; weight per link direction

Returns:

GeneratorPositions; object to draw positions from

create

public static GeneratorPositions create(Set<DirectedLanePosition> positions,
                                        StreamInterface stream,
                                        GeneratorPositions.LaneBiases biases,
                                        Map<CrossSectionLink,Double> linkWeights)

Create a GeneratorPositions object to draw positions from. The given positions are grouped per link.

Parameters:

positions - Set<DirectedLanePosition>; all considered positions, each lane is considered separately

stream - StreamInterface; stream for random numbers

biases - LaneBiases; lane biases for GTU types

linkWeights - Map<CrossSectionLink, Double>; weight per link direction

Returns:

GeneratorPositions; object to draw positions from

draw

public GeneratorPositions.GeneratorLanePosition draw(GTUType gtuType,
                                                     Map<CrossSectionLink,Map<Integer,Integer>> unplaced,
                                                     Speed desiredSpeed,
                                                     Route route)

Draw a new position to generate a GTU. The link is drawn by giving each link a weight equal to the number of accessible lanes for the GTU type. Next, a lane is drawn using (optionally biased) weights.

Parameters:

gtuType - GTUType; GTU type

unplaced - Map<CrossSectionLink, Map<Integer, Integer>>; number of unplaced GTUs per lane. The lane number should match with GeneratorLanePosition.getLaneNumber(), where 1 is the right-most lane. Missing lanes are assumed to have no queue.

desiredSpeed - Speed; desired speed, possibly used to determine the biased road position

route - Route; route, may be null

Returns:

GeneratorLanePosition; new position to generate a GTU

getLocation

public DirectedPoint getLocation()
                          throws RemoteException

Specified by:

getLocation in interface Locatable

Throws:

RemoteException

getBounds

public javax.media.j3d.Bounds getBounds()
                                 throws RemoteException

Specified by:

getBounds in interface Locatable

Throws:

RemoteException

getAllPositions

public Set<GeneratorPositions.GeneratorLanePosition> getAllPositions()

Returns all underlying positions.

Returns:

all underlying positions

speedLimit

public Speed speedLimit(GTUType gtuType)

Returns the speed limit for the given GTU type, prior to the GTU position being determined.

Parameters:

gtuType - GTUType; GTU type

Returns:

speed limit for the given GTU type, prior to the GTU position being determined