org.vadere.state.simulation

Class Trajectory

java.lang.Object

org.vadere.state.simulation.Trajectory

public class Trajectory
extends java.lang.Object

A Trajectory is a list of Pedestrian objects, that can be seen as pedestrian states of the same pedestrian. The representing pedestrian is the same, so all Pedestrian objects has the same id but the state of a pedestrian changes over time.

Field Summary

Fields

Modifier and Type	Field and Description
private java.util.Optional<Step>	firstStep
private java.util.Optional<Step>	lastStep
private int	pedestrianId
private java.util.Comparator<Step>	stepReverseComparator
private java.util.Map<Step,Agent>	trajectoryPoints

Constructor Summary

Constructors

Constructor and Description
Trajectory(int pedestrianId)
Trajectory(java.util.Map<Step,java.util.List<Agent>> pedestrianByStep, int pedestrianId)

Method Summary

Modifier and Type	Method and Description
void	addStep(Step step, Agent agent)
void	fill()
java.util.Optional<Agent>	getAgent(Step step) Returns an Optional object.
java.util.Optional<Step>	getEndStep()
java.util.Optional<java.lang.Integer>	getLifeTime()
int	getPedestrianId() Returns the pedestrian id that specified this trajectory.
java.util.stream.Stream<org.vadere.util.geometry.shapes.VPoint>	getPositionsReverse(Step step) Return a java.util.stream.Stream<> stream of VPoint pedestrian positions from the first step (1) to the (step.getStepNumber()) in reverse order.
java.util.Optional<Step>	getStartStep()
boolean	isPedestrianAlive(Step step) Returns true if the pedestrian is alive at the specific time step, alive means the pedestrain appeared and does not jet disappeared.
boolean	isPedestrianAppeared(Step step) Returns true if the pedestrian appeared, otherwise false.
boolean	isPedestrianDisappeared(Step step) Returns true if the pedestrian disappeared, otherwise false.
private java.util.stream.Stream<org.vadere.util.geometry.shapes.VPoint>	toPointStream(Agent agent)

Methods inherited from class java.lang.Object

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

Field Detail

trajectoryPoints

private final java.util.Map<Step,Agent> trajectoryPoints

stepReverseComparator

private java.util.Comparator<Step> stepReverseComparator

firstStep

private java.util.Optional<Step> firstStep

lastStep

private java.util.Optional<Step> lastStep

pedestrianId

private int pedestrianId

Constructor Detail

Trajectory

public Trajectory(int pedestrianId)

Trajectory

public Trajectory(java.util.Map<Step,java.util.List<Agent>> pedestrianByStep,
                  int pedestrianId)

Method Detail

fill

public void fill()

addStep

public void addStep(Step step,
                    @NotNull
                    Agent agent)

getLifeTime

public java.util.Optional<java.lang.Integer> getLifeTime()

getPedestrianId

public int getPedestrianId()

Returns the pedestrian id that specified this trajectory.

Returns:

the pedestrian id that specified this trajectory

isPedestrianAlive

public boolean isPedestrianAlive(Step step)

Returns true if the pedestrian is alive at the specific time step, alive means the pedestrain appeared and does not jet disappeared.

Parameters:

step - the time step

Returns:

true if the pedestrian is alive at the specific time step

isPedestrianAppeared

public boolean isPedestrianAppeared(Step step)

Returns true if the pedestrian appeared, otherwise false.

Parameters:

step - the time step

Returns:

true if the pedestrian appeared, otherwise false

isPedestrianDisappeared

public boolean isPedestrianDisappeared(Step step)

Returns true if the pedestrian disappeared, otherwise false.

Parameters:

step - the time step

Returns:

true if the pedestrian disappeared, otherwise false

getAgent

public java.util.Optional<Agent> getAgent(Step step)

Returns an Optional object. If the pedestrain has not appeared at step, the method will return the pedestrian at the first step it is alive. If the pedestrain has disappeared at step, this method return the pedestrian at the last step it is alive.

Parameters:

step - the time step that specify the pedestrian

Returns:

an Optional object which is empty if the trajectory is completely empty.

getPositionsReverse

public java.util.stream.Stream<org.vadere.util.geometry.shapes.VPoint> getPositionsReverse(Step step)

Return a java.util.stream.Stream<> stream of VPoint pedestrian positions from the first step (1) to the (step.getStepNumber()) in reverse order.

Parameters:

step - the step of the last pedestrian position

Returns:

a stream of pedestrian positions to from 1 to step.getStepNumber() in reverse order

toPointStream

private java.util.stream.Stream<org.vadere.util.geometry.shapes.VPoint> toPointStream(@NotNull
                                                                                      Agent agent)

getStartStep

public java.util.Optional<Step> getStartStep()

getEndStep

public java.util.Optional<Step> getEndStep()