This package provides classes to handle sampling steps during Ordinary Differential Equations integration.
In addition to computing the evolution of the state vector at some grid points, all
ODE integrators also build up interpolation models of this evolution inside the
last computed step. If users are interested in these interpolators, they can register a
StepHandler instance using the
addStepHandler
method which is supported by all integrators. The integrator will call this instance
at the end of each accepted step and provide it the interpolator. The user can do
whatever he wants with this interpolator, which computes both the state and its
time-derivative. A typical use of step handler is to provide some output to monitor
the integration process.
In a sense, this is a kind of Inversion Of Control: rather than having the master application driving the slave integrator by providing the target end value for the free variable, we get a master integrator scheduling the free variable evolution and calling the slave application callbacks that were registered at configuration time.
Since some integrators may use variable step size, the generic StepHandler interface can be called
either at regular or irregular rate. This interface allows to navigate to any location
within the last computed step, thanks to the provided StepInterpolator object.
If regular output is desired (for example in order to write an ephemeris file), then
the simpler FixedStepHandler
interface can be used. Objects implementing this interface should be wrapped within a
StepNormalizer instance
in order to be registered to the integrator.
| Modifier and Type | Interface and Description |
|---|---|
| public interface | FieldFixedStepHandler<
the type of the field elements T extends RealFieldElementThis interface represents a handler that should be called after each successful fixed step. |
| public interface | FieldStepHandler<
the type of the field elements T extends RealFieldElementThis interface represents a handler that should be called after each successful step. |
| public interface | FieldStepInterpolator<
the type of the field elements T extends RealFieldElementThis interface represents an interpolator over the last step during an ODE integration. |
| public interface | FixedStepHandler
This interface represents a handler that should be called after each successful fixed step. |
| public interface | StepHandler
This interface represents a handler that should be called after each successful step. |
| public interface | StepInterpolator
This interface represents an interpolator over the last step during an ODE integration. |
| Modifier and Type | Class and Description |
|---|---|
| public abstract class | AbstractFieldStepInterpolator<
the type of the field elements T extends RealFieldElementThis abstract class represents an interpolator over the last step during an ODE integration. |
| public abstract class | AbstractStepInterpolator
This abstract class represents an interpolator over the last step during an ODE integration. |
| public class | DummyStepHandler
This class is a step handler that does nothing. |
| public class | FieldStepNormalizer<
the type of the field elements T extends RealFieldElementThis class wraps an object implementing |
| public class | NordsieckStepInterpolator
This class implements an interpolator for integrators using Nordsieck representation. |
| public class | StepNormalizer
This class wraps an object implementing |
| Modifier and Type | Enum and Description |
|---|---|
| public enum | StepNormalizerBounds
|
| public enum |