integration
Class BS

java.lang.Object
  integration.BS

All Implemented Interfaces:

Integrator, org.apache.commons.math.ode.FirstOrderDifferentialEquations

public class BS
extends java.lang.Object
implements Integrator, org.apache.commons.math.ode.FirstOrderDifferentialEquations

Field Summary

static double	precision
double[][]	xyz

Constructor Summary

BS(int nbodies)

Method Summary

double	advance(double[][] xyzParam, double timeInterval, double tstep) Advances the system by the specified time, using xyzParam as initial (r, v).
void	computeDerivatives(double t, double[] y, double[] ydot)
java.lang.String	getAuthor() Returns the author's name.
boolean	getCloseEncounter()
java.lang.String	getDesc() Returns a description of the integrator.
int	getDimension()
java.lang.Object	getProperty(int property) Reserved for future use.
java.lang.String	getVersion() Returns the version of the integrator.
boolean	hasCloseEncounter() Specifies if a close encounter happened during the last advance().
void	setProperty(int property, java.lang.Object value) Reserved for future use.

Methods inherited from class java.lang.Object

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

Field Detail

xyz

public double[][] xyz

precision

public static double precision

Constructor Detail

BS

public BS(int nbodies)

Method Detail

getCloseEncounter

public boolean getCloseEncounter()

advance

public double advance(double[][] xyzParam,
                      double timeInterval,
                      double tstep)

Description copied from interface: Integrator

Advances the system by the specified time, using xyzParam as initial (r, v). xyzParam is a pointer to the xyzParam field in StellarSystem, so before finishing xyzParam should be set to the new (r, v).

Specified by:

advance in interface Integrator

Parameters:

xyzParam - Input / output coordinates

timeInterval - Amount of time to evolve for.

tstep - Timestep hint.

Returns:

Last timestep used.

hasCloseEncounter

public boolean hasCloseEncounter()

Description copied from interface: Integrator

Specifies if a close encounter happened during the last advance().

Specified by:

hasCloseEncounter in interface Integrator

Returns:

True if a close encounter happened.

getProperty

public java.lang.Object getProperty(int property)

Description copied from interface: Integrator

Reserved for future use.

Specified by:

getProperty in interface Integrator

Parameters:

property - Specifies which property to return.

Returns:

Value of the requested property.

setProperty

public void setProperty(int property,
                        java.lang.Object value)

Description copied from interface: Integrator

Reserved for future use.

Specified by:

setProperty in interface Integrator

Parameters:

property - Which property to set.

value - Value of the property.

getAuthor

public java.lang.String getAuthor()

Description copied from interface: Integrator

Returns the author's name.

Specified by:

getAuthor in interface Integrator

Returns:

Author's name.

getVersion

public java.lang.String getVersion()

Description copied from interface: Integrator

Returns the version of the integrator.

Specified by:

getVersion in interface Integrator

Returns:

Version

getDesc

public java.lang.String getDesc()

Description copied from interface: Integrator

Returns a description of the integrator.

Specified by:

getDesc in interface Integrator

Returns:

Description.

getDimension

public int getDimension()

Specified by:

getDimension in interface org.apache.commons.math.ode.FirstOrderDifferentialEquations

computeDerivatives

public final void computeDerivatives(double t,
                                     double[] y,
                                     double[] ydot)
                              throws org.apache.commons.math.ode.DerivativeException

Specified by:

computeDerivatives in interface org.apache.commons.math.ode.FirstOrderDifferentialEquations

Throws:

org.apache.commons.math.ode.DerivativeException