Package org.opensourcephysics.numerics

Interface ODE

All Known Implementing Classes:
DynamicParticle, DynamicParticlePolar, DynamicSystem, ODEMultistepSolver.InternalODE
public interface ODE
ODE defines a system of differential equations by providing access to the rate equations.
Author:
Wolfgang Christian

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    getRate(double[] state, double[] rate)
    Gets the rate of change using the argument's state variables.
    double[]
    getState()
    Gets the state variables.

  • Method Details

    • getState

      double[] getState()
      Gets the state variables. The getState method is invoked by an ODESolver to obtain the initial state of the system. The ODE solver advances the solution and then copies new values into the state array at the end of the solution step.
      Returns:
      state the state

    • getRate

      void getRate(double[] state, double[] rate)
      Gets the rate of change using the argument's state variables. This method may be invoked many times with different intermediate states as an ODESolver is carrying out the solution.
      Parameters:
      state - the state array
      rate - the rate array