fr.cnes.sirius.patrius.propagation.sampling

Class PatriusStepNormalizer

java.lang.Object

fr.cnes.sirius.patrius.propagation.sampling.PatriusStepNormalizer

All Implemented Interfaces:

PatriusStepHandler, Serializable

public class PatriusStepNormalizer
extends Object
implements PatriusStepHandler

This class wraps an object implementing PatriusFixedStepHandler into a PatriusStepHandler.

It mirrors the StepNormalizer interface from commons-math but provides a space-dynamics interface to the methods.

Modified to take into account propagation direction (in time). Lines 111 to 115 Cf A-1031.

Author:

Luc Maisonobe

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
PatriusStepNormalizer(double hIn, PatriusFixedStepHandler handlerIn) Simple constructor.

Method Summary

Modifier and Type	Method and Description
void	handleStep(PatriusStepInterpolator interpolator, boolean isLast) Handle the last accepted step.
void	init(SpacecraftState s0, AbsoluteDate t) Initialize step handler at the start of a propagation.
boolean	requiresDenseOutput() Determines whether this handler needs dense output.

Methods inherited from class java.lang.Object

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

Constructor Detail

PatriusStepNormalizer

public PatriusStepNormalizer(double hIn,
                             PatriusFixedStepHandler handlerIn)

Simple constructor.

Parameters:

hIn - fixed time step (sign is not used)

handlerIn - fixed time step handler to wrap

Method Detail

requiresDenseOutput

public boolean requiresDenseOutput()

Determines whether this handler needs dense output. This handler needs dense output in order to provide data at regularly spaced steps regardless of the steps the propagator uses, so this method always returns true.

Returns:

always true

init

public void init(SpacecraftState s0,
                 AbsoluteDate t)
          throws PatriusException

Initialize step handler at the start of a propagation.

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

Specified by:

init in interface PatriusStepHandler

Parameters:

s0 - initial state

t - target time for the integration

Throws:

PatriusException - thrown if initialization failed

handleStep

public void handleStep(PatriusStepInterpolator interpolator,
                       boolean isLast)
                throws PropagationException

Handle the last accepted step.

Specified by:

handleStep in interface PatriusStepHandler

Parameters:

interpolator - interpolator for the last accepted step. For efficiency purposes, the various propagators reuse the same object on each call, so if the instance wants to keep it across all calls (for example to provide at the end of the propagation a continuous model valid throughout the propagation range), it should build a local copy using the clone method and store this copy.

isLast - true if the step is the last one

Throws:

PropagationException - this exception is propagated to the caller if the underlying user function triggers one