Package cnuphys.rk4

Class DefaultStopper

java.lang.Object

cnuphys.rk4.DefaultStopper

All Implemented Interfaces:

IStopper

public class DefaultStopper
extends Object
implements IStopper

Default stopper in fact never stops!

Author:

heddle

Constructor Summary

Constructors

Constructor	Description
DefaultStopper()

Method Summary

Modifier and Type	Method	Description
double	getFinalT()	Get the final independent variable (typically path length in meters)
void	setFinalT(double finalT)	Set the final independent variable (typically path length in meters)
boolean	stopIntegration(double t, double[] y)	Given the current state of the integration, should we stop?

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface cnuphys.rk4.IStopper

terminateIntegration

Constructor Details

DefaultStopper

public DefaultStopper()

Method Details

stopIntegration

public boolean stopIntegration(double t,
 double[] y)

Description copied from interface: IStopper

Given the current state of the integration, should we stop? This allows the integration to stop, for example, if some distance from the origin has been exceeded or if the independent variable passes some threshold. It won't be precise, because the check may not happen on every step, but it should be close.

Specified by:

stopIntegration in interface IStopper

Parameters:

t - the current value of the independent variable (typically pathlength)

y - the current state vector (typically [x, y, z, vx, vy, vz])

Returns:

true if we should stop now.

getFinalT

public double getFinalT()

Description copied from interface: IStopper

Get the final independent variable (typically path length in meters)

Specified by:

getFinalT in interface IStopper

Returns:

the final independent variable (typically path length in meters)

setFinalT

public void setFinalT(double finalT)

Description copied from interface: IStopper

Set the final independent variable (typically path length in meters)

Specified by:

setFinalT in interface IStopper

Parameters:

finalT - the final independent variable (typically path length in meters)