org.orekit.frames.transformations
Class InterpolatingTransformProvider

java.lang.Object
  org.orekit.frames.transformations.InterpolatingTransformProvider

All Implemented Interfaces:

Serializable, TransformProvider

public class InterpolatingTransformProvider
extends Object
implements TransformProvider

Transform provider using thread-safe interpolation on transforms sample.

The interpolation is a polynomial Hermite interpolation, which can either use or ignore the derivatives provided by the raw provider. This means that simple raw providers that do not compute derivatives can be used, the derivatives will be added appropriately by the interpolation process.

Author:

Luc Maisonobe

See Also:

TimeStampedCache, Serialized Form

Constructor Summary

InterpolatingTransformProvider(TransformProvider rawProvider, boolean useVelocities, boolean useRotationRates, AbsoluteDate earliest, AbsoluteDate latest, int gridPoints, double step, int maxSlots, double maxSpan, double newSlotInterval)
Simple constructor.

InterpolatingTransformProvider(TransformProvider rawProvider, boolean useVelocities, boolean useRotationRates, AbsoluteDate earliest, AbsoluteDate latest, int gridPoints, double step, int maxSlots, double maxSpan, double newSlotInterval, boolean computeSpinDerivatives)
Simple constructor.

Method Summary

TransformProvider	getRawProvider() Get the underlying provider for raw (non-interpolated) transforms.
Transform	getTransform(AbsoluteDate date) Get the Transform corresponding to specified date.
Transform	getTransform(AbsoluteDate date, boolean computeSpinDerivatives) Get the Transform corresponding to specified date.
Transform	getTransform(AbsoluteDate date, FramesConfiguration config) Get the Transform corresponding to specified date.
Transform	getTransform(AbsoluteDate date, FramesConfiguration config, boolean computeSpinDerivatives) Get the Transform corresponding to specified date.

Methods inherited from class java.lang.Object

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

Constructor Detail

InterpolatingTransformProvider

public InterpolatingTransformProvider(TransformProvider rawProvider,
                                      boolean useVelocities,
                                      boolean useRotationRates,
                                      AbsoluteDate earliest,
                                      AbsoluteDate latest,
                                      int gridPoints,
                                      double step,
                                      int maxSlots,
                                      double maxSpan,
                                      double newSlotInterval)

Simple constructor.

Parameters:

rawProvider - provider for raw (non-interpolated) transforms

useVelocities - if true, use sample transforms velocities, otherwise ignore them and use only positions

useRotationRates - if true, use sample points rotation rates, otherwise ignore them and use only rotations

earliest - earliest supported date

latest - latest supported date

gridPoints - number of interpolation grid points

step - grid points time step

maxSlots - maximum number of independent cached time slots in the time-stamped cache

maxSpan - maximum duration span in seconds of one slot in the time-stamped cache

newSlotInterval - time interval above which a new slot is created in the time-stamped cache

InterpolatingTransformProvider

public InterpolatingTransformProvider(TransformProvider rawProvider,
                                      boolean useVelocities,
                                      boolean useRotationRates,
                                      AbsoluteDate earliest,
                                      AbsoluteDate latest,
                                      int gridPoints,
                                      double step,
                                      int maxSlots,
                                      double maxSpan,
                                      double newSlotInterval,
                                      boolean computeSpinDerivatives)

Simple constructor.

Parameters:

rawProvider - provider for raw (non-interpolated) transforms

useVelocities - if true, use sample transforms velocities, otherwise ignore them and use only positions

useRotationRates - if true, use sample points rotation rates, otherwise ignore them and use only rotations

earliest - earliest supported date

latest - latest supported date

gridPoints - number of interpolation grid points

step - grid points time step

maxSlots - maximum number of independent cached time slots in the time-stamped cache

maxSpan - maximum duration span in seconds of one slot in the time-stamped cache

newSlotInterval - time interval above which a new slot is created

computeSpinDerivatives - spin derivatives are computed : true, or not : false in the time-stamped cache

Method Detail

getRawProvider

public TransformProvider getRawProvider()

Get the underlying provider for raw (non-interpolated) transforms.

Returns:

provider for raw (non-interpolated) transforms

getTransform

public Transform getTransform(AbsoluteDate date)
                       throws OrekitException

Get the Transform corresponding to specified date.

Warning: spin derivative is not computed.

Specified by:

getTransform in interface TransformProvider

Parameters:

date - current date

Returns:

transform at specified date

Throws:

OrekitException - if transform cannot be computed at given date

getTransform

public Transform getTransform(AbsoluteDate date,
                              FramesConfiguration config)
                       throws OrekitException

Get the Transform corresponding to specified date.

Warning: spin derivative is not computed.

Specified by:

getTransform in interface TransformProvider

Parameters:

date - current date

config - frames configuration to use

Returns:

transform at specified date

Throws:

OrekitException - if transform cannot be computed at given date

getTransform

public Transform getTransform(AbsoluteDate date,
                              boolean computeSpinDerivatives)
                       throws OrekitException

Get the Transform corresponding to specified date.

Specified by:

getTransform in interface TransformProvider

Parameters:

date - current date

computeSpinDerivatives - true if spin derivatives should be computed. If not, spin derivative is set to null

Returns:

transform at specified date

Throws:

OrekitException - if transform cannot be computed at given date

getTransform

public Transform getTransform(AbsoluteDate date,
                              FramesConfiguration config,
                              boolean computeSpinDerivatives)
                       throws OrekitException

Get the Transform corresponding to specified date.

Specified by:

getTransform in interface TransformProvider

Parameters:

date - current date

config - frames configuration to use

computeSpinDerivatives - true if spin derivatives should be computed. If not, spin derivative is set to null

Returns:

transform at specified date

Throws:

OrekitException - if transform cannot be computed at given date