Interface FieldStepInterpolator<T extends RealFieldElement<T>>

 Type Parameters:
T
 the type of the field elements
 All Known Implementing Classes:
AbstractFieldStepInterpolator
public interface FieldStepInterpolator<T extends RealFieldElement<T>>
This interface represents an interpolator over the last step during an ODE integration.The various ODE integrators provide objects implementing this interface to the step handlers. These objects are often custom objects tightly bound to the integrator internal algorithms. The handlers can use these objects to retrieve the state vector at intermediate times between the previous and the current grid points (this feature is often called dense output).
 Since:
 3.6
 See Also:
FirstOrderFieldIntegrator
,FieldStepHandler


Method Summary
All Methods Instance Methods Abstract Methods Modifier and Type Method Description FieldODEStateAndDerivative<T>
getCurrentState()
Get the state at current grid point time.FieldODEStateAndDerivative<T>
getInterpolatedState(T time)
Get the state at interpolated time.FieldODEStateAndDerivative<T>
getPreviousState()
Get the state at previous grid point time.boolean
isForward()
Check if the natural integration direction is forward.



Method Detail

getPreviousState
FieldODEStateAndDerivative<T> getPreviousState()
Get the state at previous grid point time. Returns:
 state at previous grid point time

getCurrentState
FieldODEStateAndDerivative<T> getCurrentState()
Get the state at current grid point time. Returns:
 state at current grid point time

getInterpolatedState
FieldODEStateAndDerivative<T> getInterpolatedState(T time)
Get the state at interpolated time.Setting the time outside of the current step is allowed, but should be used with care since the accuracy of the interpolator will probably be very poor far from this step. This allowance has been added to simplify implementation of search algorithms near the step endpoints.
 Parameters:
time
 time of the interpolated point Returns:
 state at interpolated time

isForward
boolean isForward()
Check if the natural integration direction is forward.This method provides the integration direction as specified by the integrator itself, it avoid some nasty problems in degenerated cases like null steps due to cancellation at step initialization, step control or discrete events triggering.
 Returns:
 true if the integration variable (time) increases during integration

