Package org.orekit.propagation.events

Class FieldAbstractDetector<D extends FieldAbstractDetector<D,T>,T extends CalculusFieldElement<T>>

java.lang.Object

org.orekit.propagation.events.FieldAbstractDetector<D,T>

Type Parameters:

D - type of the detector

T - type of the field element

All Implemented Interfaces:

FieldEventDetector<T>

Direct Known Subclasses:

FieldAltitudeDetector, FieldApsideDetector, FieldBetaAngleDetector, FieldBooleanDetector, FieldCylindricalShadowEclipseDetector, FieldDateDetector, FieldEclipseDetector, FieldElevationDetector, FieldElevationExtremumDetector, FieldEventEnablingPredicateFilter, FieldEventSlopeFilter, FieldExtremumApproachDetector, FieldFunctionalDetector, FieldImpulseManeuver, FieldLatitudeCrossingDetector, FieldLatitudeRangeCrossingDetector, FieldLongitudeCrossingDetector, FieldLongitudeRangeCrossingDetector, FieldNegateDetector, FieldNodeDetector, FieldParameterDrivenDateIntervalDetector, FieldRelativeDistanceDetector

public abstract class FieldAbstractDetector<D extends FieldAbstractDetector<D,T>,T extends CalculusFieldElement<T>>
extends Object
implements FieldEventDetector<T>

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 cmaximum 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	FieldAbstractDetector(FieldAdaptableInterval<T> maxCheck, T threshold, int maxIter, FieldEventHandler<T> handler)	Build a new instance.

Method Summary

Modifier and Type	Method	Description
protected abstract D	create(FieldAdaptableInterval<T> newMaxCheck, T newThreshold, int newMaxIter, FieldEventHandler<T> newHandler)	Build a new instance.
abstract T	g(FieldSpacecraftState<T> s)	Compute the value of the switching function.
FieldEventHandler<T>	getHandler()	Get the handler.
FieldAdaptableInterval<T>	getMaxCheckInterval()	Get maximal time interval between switching function checks.
int	getMaxIterationCount()	Get maximal number of iterations in the event time search.
T	getThreshold()	Get the convergence threshold in the event time search.
void	init(FieldSpacecraftState<T> s0, FieldAbsoluteDate<T> t)	Initialize event handler at the start of a propagation.
boolean	isForward()	Check if the current propagation is forward or backward.
D	withHandler(FieldEventHandler<T> newHandler)	Setup the event handler to call at event occurrences.
D	withMaxCheck(double newMaxCheck)	Setup the maximum checking interval.
D	withMaxCheck(FieldAdaptableInterval<T> newMaxCheck)	Setup the maximum checking interval.
D	withMaxIter(int newMaxIter)	Setup the maximum number of iterations in the event time search.
D	withThreshold(T newThreshold)	Setup the convergence threshold.

Methods inherited from class java.lang.Object

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

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 cmaximum number of iterations in the event time search.

See Also:

Constant Field Values

Constructor Detail

FieldAbstractDetector

protected FieldAbstractDetector(FieldAdaptableInterval<T> maxCheck,
                                T threshold,
                                int maxIter,
                                FieldEventHandler<T> handler)

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

Method Detail

init

public void init(FieldSpacecraftState<T> s0,
                 FieldAbsoluteDate<T> 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

Specified by:

init in interface FieldEventDetector<D extends FieldAbstractDetector<D,T>>

Parameters:

s0 - initial state

t - target time for the integration

g

public abstract T g(FieldSpacecraftState<T> s)

Compute the value of the switching function. This function must be continuous (at least in its roots neighborhood), as the integrator will need to find its roots to locate the events.

Specified by:

g in interface FieldEventDetector<D extends FieldAbstractDetector<D,T>>

Parameters:

s - the current state information: date, kinematics, attitude

Returns:

value of the switching function

getMaxCheckInterval

public FieldAdaptableInterval<T> getMaxCheckInterval()

Get maximal time interval between switching function checks.

Specified by:

getMaxCheckInterval in interface FieldEventDetector<D extends FieldAbstractDetector<D,T>>

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 FieldEventDetector<D extends FieldAbstractDetector<D,T>>

Returns:

maximal number of iterations in the event time search

getThreshold

public T getThreshold()

Get the convergence threshold in the event time search.

Specified by:

getThreshold in interface FieldEventDetector<D extends FieldAbstractDetector<D,T>>

Returns:

convergence threshold (s)

withMaxCheck

public D withMaxCheck(double newMaxCheck)

Setup 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

withMaxCheck

public D withMaxCheck(FieldAdaptableInterval<T> newMaxCheck)

Setup 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 D withMaxIter(int newMaxIter)

Setup 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 D withThreshold(T newThreshold)

Setup 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

withHandler

public D withHandler(FieldEventHandler<T> newHandler)

Setup 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 FieldEventHandler<T> getHandler()

Get the handler.

Specified by:

getHandler in interface FieldEventDetector<D extends FieldAbstractDetector<D,T>>

Returns:

event handler to call at event occurrences

create

protected abstract D create(FieldAdaptableInterval<T> newMaxCheck,
                            T newThreshold,
                            int newMaxIter,
                            FieldEventHandler<T> newHandler)

Build a new instance.

Parameters:

newMaxCheck - maximum checking interval

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

isForward

public boolean isForward()

Check if the current propagation is forward or backward.

Returns:

true if the current propagation is forward

Since:

7.2