Package org.orekit.propagation.events

Class AbstractDetector<T extends AbstractDetector<T>>

java.lang.Object

org.orekit.propagation.events.AbstractDetector<T>

Type Parameters:

T - type of the detector

All Implemented Interfaces:

EventDetector

Direct Known Subclasses:

AlignmentDetector, AltitudeDetector, AngularSeparationDetector, AngularSeparationFromSatelliteDetector, ApsideDetector, BetaAngleDetector, BooleanDetector, CylindricalShadowEclipseDetector, DateDetector, EclipseDetector, ElevationDetector, ElevationExtremumDetector, EventEnablingPredicateFilter, EventShifter, EventSlopeFilter, ExtremumApproachDetector, FieldOfViewDetector, FootprintOverlapDetector, FunctionalDetector, GeographicZoneDetector, GroundAtNightDetector, GroundFieldOfViewDetector, HaloXZPlaneCrossingDetector, ImpulseManeuver, InterSatDirectViewDetector, LatitudeCrossingDetector, LatitudeExtremumDetector, LatitudeRangeCrossingDetector, LongitudeCrossingDetector, LongitudeExtremumDetector, LongitudeRangeCrossingDetector, MagneticFieldDetector, NegateDetector, NodeDetector, ParameterDrivenDateIntervalDetector, PositionAngleDetector, RelativeDistanceDetector

public abstract class AbstractDetector<T extends AbstractDetector<T>>
extends Object
implements EventDetector

Common parts shared by several orbital events finders.

Author:

Luc Maisonobe

See Also:

Propagator.addEventDetector(EventDetector)

Field Summary

Fields

Modifier and Type	Field	Description
static int	DEFAULT_MAX_ITER	Default maximum number of iterations in the event time search.
static double	DEFAULT_MAXCHECK	Default maximum checking interval (s).
static double	DEFAULT_THRESHOLD	Default convergence threshold (s).

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AbstractDetector(double maxCheck, double threshold, int maxIter, EventHandler handler)	Build a new instance.
protected	AbstractDetector(AdaptableInterval maxCheck, double threshold, int maxIter, EventHandler handler)	Deprecated. as of 12.2
protected	AbstractDetector(EventDetectionSettings detectionSettings, EventHandler handler)	Build a new instance.

Method Summary

Modifier and Type	Method	Description
protected abstract T	create(AdaptableInterval newMaxCheck, double newThreshold, int newMaxIter, EventHandler newHandler)	Build a new instance.
protected T	create(EventDetectionSettings detectionSettings, EventHandler newHandler)	Build a new instance.
EventDetectionSettings	getDetectionSettings()	Getter for the settings.
EventHandler	getHandler()	Get the handler.
AdaptableInterval	getMaxCheckInterval()	Get maximal time interval between switching function checks.
int	getMaxIterationCount()	Get maximal number of iterations in the event time search.
double	getThreshold()	Get the convergence threshold in the event time search.
void	init(SpacecraftState s0, AbsoluteDate t)	Initialize event handler at the start of a propagation.
boolean	isForward()	Check if the current propagation is forward or backward.
T	withDetectionSettings(EventDetectionSettings newSettings)	Set up the event detection settings.
T	withHandler(EventHandler newHandler)	Set up the event handler to call at event occurrences.
T	withMaxCheck(double newMaxCheck)	Set up the maximum checking interval.
T	withMaxCheck(AdaptableInterval newMaxCheck)	Set up the maximum checking interval.
T	withMaxIter(int newMaxIter)	Set up the maximum number of iterations in the event time search.
T	withThreshold(double newThreshold)	Set up the convergence threshold.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.orekit.propagation.events.EventDetector

finish, g

Field Detail

DEFAULT_MAXCHECK

public static final double DEFAULT_MAXCHECK

Default maximum checking interval (s).

See Also:

Constant Field Values

DEFAULT_THRESHOLD

public static final double DEFAULT_THRESHOLD

Default convergence threshold (s).

See Also:

Constant Field Values

DEFAULT_MAX_ITER

public static final int DEFAULT_MAX_ITER

Default maximum number of iterations in the event time search.

See Also:

Constant Field Values

Constructor Detail

AbstractDetector

protected AbstractDetector(double maxCheck,
                           double threshold,
                           int maxIter,
                           EventHandler handler)

Build a new instance.

Parameters:

maxCheck - maximum checking interval, must be strictly positive (s)

threshold - convergence threshold (s)

maxIter - maximum number of iterations in the event time search

handler - event handler to call at event occurrences

AbstractDetector

@Deprecated
protected AbstractDetector(AdaptableInterval maxCheck,
                           double threshold,
                           int maxIter,
                           EventHandler handler)

Deprecated.

as of 12.2

Build a new instance.

Parameters:

maxCheck - maximum checking interval

threshold - convergence threshold (s)

maxIter - maximum number of iterations in the event time search

handler - event handler to call at event occurrences

Since:

12.0

AbstractDetector

protected AbstractDetector(EventDetectionSettings detectionSettings,
                           EventHandler handler)

Build a new instance.

Parameters:

detectionSettings - event detection settings

handler - event handler to call at event occurrences

Since:

12.2

Method Detail

init

public void init(SpacecraftState s0,
                 AbsoluteDate t)

Initialize event handler at the start of a propagation.

This method is called once at the start of the propagation. It may be used by the event handler to initialize some internal data if needed.

The default implementation does nothing

This implementation sets the direction of propagation and initializes the event handler. If a subclass overrides this method it should call super.init(s0, t).

Specified by:

init in interface EventDetector

Parameters:

s0 - initial state

t - target time for the integration

getDetectionSettings

public EventDetectionSettings getDetectionSettings()

Getter for the settings.

Specified by:

getDetectionSettings in interface EventDetector

Returns:

detection settings

getMaxCheckInterval

public AdaptableInterval getMaxCheckInterval()

Get maximal time interval between switching function checks.

Specified by:

getMaxCheckInterval in interface EventDetector

Returns:

maximal time interval (s) between switching function checks

getMaxIterationCount

public int getMaxIterationCount()

Get maximal number of iterations in the event time search.

Specified by:

getMaxIterationCount in interface EventDetector

Returns:

maximal number of iterations in the event time search

getThreshold

public double getThreshold()

Get the convergence threshold in the event time search.

Specified by:

getThreshold in interface EventDetector

Returns:

convergence threshold (s)

withMaxCheck

public T withMaxCheck(double newMaxCheck)

Set up the maximum checking interval.

This will override a maximum checking interval if it has been configured previously.

Parameters:

newMaxCheck - maximum checking interval (s)

Returns:

a new detector with updated configuration (the instance is not changed)

Since:

6.1

withMaxCheck

public T withMaxCheck(AdaptableInterval newMaxCheck)

Set up the maximum checking interval.

This will override a maximum checking interval if it has been configured previously.

Parameters:

newMaxCheck - maximum checking interval (s)

Returns:

a new detector with updated configuration (the instance is not changed)

Since:

12.0

withMaxIter

public T withMaxIter(int newMaxIter)

Set up the maximum number of iterations in the event time search.

This will override a number of iterations if it has been configured previously.

Parameters:

newMaxIter - maximum number of iterations in the event time search

Returns:

a new detector with updated configuration (the instance is not changed)

Since:

6.1

withThreshold

public T withThreshold(double newThreshold)

Set up the convergence threshold.

This will override a convergence threshold if it has been configured previously.

Parameters:

newThreshold - convergence threshold (s)

Returns:

a new detector with updated configuration (the instance is not changed)

Since:

6.1

withDetectionSettings

public T withDetectionSettings(EventDetectionSettings newSettings)

Set up the event detection settings.

This will override settings previously configured.

Parameters:

newSettings - new event detection settings

Returns:

a new detector with updated configuration (the instance is not changed)

Since:

12.2

withHandler

public T withHandler(EventHandler newHandler)

Set up the event handler to call at event occurrences.

This will override a handler if it has been configured previously.

Parameters:

newHandler - event handler to call at event occurrences

Returns:

a new detector with updated configuration (the instance is not changed)

Since:

6.1

getHandler

public EventHandler getHandler()

Get the handler.

Specified by:

getHandler in interface EventDetector

Returns:

event handler to call at event occurrences

create

protected abstract T create(AdaptableInterval newMaxCheck,
                            double newThreshold,
                            int newMaxIter,
                            EventHandler newHandler)

Build a new instance.

Parameters:

newMaxCheck - maximum checking interval (s)

newThreshold - convergence threshold (s)

newMaxIter - maximum number of iterations in the event time search

newHandler - event handler to call at event occurrences

Returns:

a new instance of the appropriate sub-type WARNING: this method will be removed in 13.0. It doesn't have the deprecated annotation because the method is abstract and shall be implemented

create

protected T create(EventDetectionSettings detectionSettings,
                   EventHandler newHandler)

Build a new instance.

Parameters:

detectionSettings - detection settings

newHandler - event handler to call at event occurrences

Returns:

a new instance of the appropriate sub-type

Since:

12.2

isForward

public boolean isForward()

Check if the current propagation is forward or backward.

Returns:

true if the current propagation is forward

Since:

7.2