Class MultistepIntegrator.NordsieckInitializer

  • All Implemented Interfaces:
    StepHandler
    Enclosing class:
    MultistepIntegrator

    private class MultistepIntegrator.NordsieckInitializer
    extends java.lang.Object
    implements StepHandler
    Specialized step handler storing the first step.
    • Field Summary

      Fields 
      Modifier and Type Field Description
      private int count
      Steps counter.
      private double[] t
      First steps times.
      private double[][] y
      First steps states.
      private double[][] yDot
      First steps derivatives.
    • Constructor Summary

      Constructors 
      Constructor Description
      NordsieckInitializer​(int nbStartPoints, int n)
      Simple constructor.
    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void handleStep​(StepInterpolator interpolator, boolean isLast)
      Handle the last accepted step
      void init​(double t0, double[] y0, double time)
      Initialize step handler at the start of an ODE integration.
      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    • Field Detail

      • count

        private int count
        Steps counter.
      • t

        private final double[] t
        First steps times.
      • y

        private final double[][] y
        First steps states.
      • yDot

        private final double[][] yDot
        First steps derivatives.
    • Constructor Detail

      • NordsieckInitializer

        NordsieckInitializer​(int nbStartPoints,
                             int n)
        Simple constructor.
        Parameters:
        nbStartPoints - number of start points (including the initial point)
        n - problem dimension
    • Method Detail

      • handleStep

        public void handleStep​(StepInterpolator interpolator,
                               boolean isLast)
                        throws MaxCountExceededException
        Handle the last accepted step
        Specified by:
        handleStep in interface StepHandler
        Parameters:
        interpolator - interpolator for the last accepted step. For efficiency purposes, the various integrators 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 integration a continuous model valid throughout the integration range, as the ContinuousOutputModel class does), it should build a local copy using the clone method of the interpolator and store this copy. Keeping only a reference to the interpolator and reusing it will result in unpredictable behavior (potentially crashing the application).
        isLast - true if the step is the last one
        Throws:
        MaxCountExceededException - if the interpolator throws one because the number of functions evaluations is exceeded
      • init

        public void init​(double t0,
                         double[] y0,
                         double time)
        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.

        Specified by:
        init in interface StepHandler
        Parameters:
        t0 - start value of the independent time variable
        y0 - array containing the start value of the state vector
        time - target time for the integration