Class StepNormalizer
- All Implemented Interfaces:
ODEStepHandler
ODEFixedStepHandler
into a ODEStepHandler
.
This wrapper allows to use fixed step handlers with general integrators which cannot guaranty their integration steps will remain constant and therefore only accept general step handlers.
The stepsize used is selected at construction time. The handleStep
method of the underlying
ODEFixedStepHandler
object is called at normalized times. The
normalized times can be influenced by the StepNormalizerMode
and
StepNormalizerBounds
.
There is no constraint on the integrator, it can use any time step it needs (time steps longer or shorter than the fixed time step and non-integer ratios are all allowed).
Start time | End time | Direction | Mode |
Bounds | Output |
0.3 | 3.1 | forward | INCREMENT | NEITHER | 0.8, 1.3, 1.8, 2.3, 2.8 |
0.3 | 3.1 | forward | INCREMENT | FIRST | 0.3, 0.8, 1.3, 1.8, 2.3, 2.8 |
0.3 | 3.1 | forward | INCREMENT | LAST | 0.8, 1.3, 1.8, 2.3, 2.8, 3.1 |
0.3 | 3.1 | forward | INCREMENT | BOTH | 0.3, 0.8, 1.3, 1.8, 2.3, 2.8, 3.1 |
0.3 | 3.1 | forward | MULTIPLES | NEITHER | 0.5, 1.0, 1.5, 2.0, 2.5, 3.0 |
0.3 | 3.1 | forward | MULTIPLES | FIRST | 0.3, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0 |
0.3 | 3.1 | forward | MULTIPLES | LAST | 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.1 |
0.3 | 3.1 | forward | MULTIPLES | BOTH | 0.3, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.1 |
0.0 | 3.0 | forward | INCREMENT | NEITHER | 0.5, 1.0, 1.5, 2.0, 2.5, 3.0 |
0.0 | 3.0 | forward | INCREMENT | FIRST | 0.0, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0 |
0.0 | 3.0 | forward | INCREMENT | LAST | 0.5, 1.0, 1.5, 2.0, 2.5, 3.0 |
0.0 | 3.0 | forward | INCREMENT | BOTH | 0.0, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0 |
0.0 | 3.0 | forward | MULTIPLES | NEITHER | 0.5, 1.0, 1.5, 2.0, 2.5, 3.0 |
0.0 | 3.0 | forward | MULTIPLES | FIRST | 0.0, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0 |
0.0 | 3.0 | forward | MULTIPLES | LAST | 0.5, 1.0, 1.5, 2.0, 2.5, 3.0 |
0.0 | 3.0 | forward | MULTIPLES | BOTH | 0.0, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0 |
3.1 | 0.3 | backward | INCREMENT | NEITHER | 2.6, 2.1, 1.6, 1.1, 0.6 |
3.1 | 0.3 | backward | INCREMENT | FIRST | 3.1, 2.6, 2.1, 1.6, 1.1, 0.6 |
3.1 | 0.3 | backward | INCREMENT | LAST | 2.6, 2.1, 1.6, 1.1, 0.6, 0.3 |
3.1 | 0.3 | backward | INCREMENT | BOTH | 3.1, 2.6, 2.1, 1.6, 1.1, 0.6, 0.3 |
3.1 | 0.3 | backward | MULTIPLES | NEITHER | 3.0, 2.5, 2.0, 1.5, 1.0, 0.5 |
3.1 | 0.3 | backward | MULTIPLES | FIRST | 3.1, 3.0, 2.5, 2.0, 1.5, 1.0, 0.5 |
3.1 | 0.3 | backward | MULTIPLES | LAST | 3.0, 2.5, 2.0, 1.5, 1.0, 0.5, 0.3 |
3.1 | 0.3 | backward | MULTIPLES | BOTH | 3.1, 3.0, 2.5, 2.0, 1.5, 1.0, 0.5, 0.3 |
3.0 | 0.0 | backward | INCREMENT | NEITHER | 2.5, 2.0, 1.5, 1.0, 0.5, 0.0 |
3.0 | 0.0 | backward | INCREMENT | FIRST | 3.0, 2.5, 2.0, 1.5, 1.0, 0.5, 0.0 |
3.0 | 0.0 | backward | INCREMENT | LAST | 2.5, 2.0, 1.5, 1.0, 0.5, 0.0 |
3.0 | 0.0 | backward | INCREMENT | BOTH | 3.0, 2.5, 2.0, 1.5, 1.0, 0.5, 0.0 |
3.0 | 0.0 | backward | MULTIPLES | NEITHER | 2.5, 2.0, 1.5, 1.0, 0.5, 0.0 |
3.0 | 0.0 | backward | MULTIPLES | FIRST | 3.0, 2.5, 2.0, 1.5, 1.0, 0.5, 0.0 |
3.0 | 0.0 | backward | MULTIPLES | LAST | 2.5, 2.0, 1.5, 1.0, 0.5, 0.0 |
3.0 | 0.0 | backward | MULTIPLES | BOTH | 3.0, 2.5, 2.0, 1.5, 1.0, 0.5, 0.0 |
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Constructor Summary
ConstructorDescriptionStepNormalizer
(double h, ODEFixedStepHandler handler) Simple constructor.StepNormalizer
(double h, ODEFixedStepHandler handler, StepNormalizerBounds bounds) Simple constructor.StepNormalizer
(double h, ODEFixedStepHandler handler, StepNormalizerMode mode) Simple constructor.StepNormalizer
(double h, ODEFixedStepHandler handler, StepNormalizerMode mode, StepNormalizerBounds bounds) Simple constructor. -
Method Summary
Modifier and TypeMethodDescriptionvoid
finish
(ODEStateAndDerivative finalState) Finalize integration.void
handleStep
(ODEStateInterpolator interpolator) Handle the last accepted step.void
init
(ODEStateAndDerivative initialState, double finalTime) Initialize step handler at the start of an ODE integration.
-
Constructor Details
-
StepNormalizer
- Parameters:
h
- fixed time step (sign is not used)handler
- fixed time step handler to wrap
-
StepNormalizer
Simple constructor. UsesFIRST
bounds setting.- Parameters:
h
- fixed time step (sign is not used)handler
- fixed time step handler to wrapmode
- step normalizer mode to use
-
StepNormalizer
Simple constructor. UsesINCREMENT
mode.- Parameters:
h
- fixed time step (sign is not used)handler
- fixed time step handler to wrapbounds
- step normalizer bounds setting to use
-
StepNormalizer
public StepNormalizer(double h, ODEFixedStepHandler handler, StepNormalizerMode mode, StepNormalizerBounds bounds) Simple constructor.- Parameters:
h
- fixed time step (sign is not used)handler
- fixed time step handler to wrapmode
- step normalizer mode to usebounds
- step normalizer bounds setting to use
-
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Method Details
-
init
Initialize step handler at the start of an ODE integration.This method is called once at the start of the integration. It may be used by the step handler to initialize some internal data if needed.
The default implementation does nothing
- Specified by:
init
in interfaceODEStepHandler
- Parameters:
initialState
- initial time, state vector and derivativefinalTime
- target time for the integration
-
handleStep
Handle the last accepted step.- Specified by:
handleStep
in interfaceODEStepHandler
- Parameters:
interpolator
- interpolator for the last accepted step
-
finish
Finalize integration.- Specified by:
finish
in interfaceODEStepHandler
- Parameters:
finalState
- state at integration end
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