org.opensourcephysics.sip.ch05
Class ThreeBody

java.lang.Object
  org.opensourcephysics.sip.ch05.ThreeBody

All Implemented Interfaces:

Drawable, ODE

public class ThreeBody
extends java.lang.Object
implements Drawable, ODE

ThreeBody models the gravitational three-body problem.

Constructor Summary

ThreeBody()

Method Summary

void	doStep() Steps the time using an ode solver.
void	draw(DrawingPanel panel, java.awt.Graphics g) Draws the three bodies.
void	getRate(double[] state, double[] rate) Gets the rate using the given state.
double[]	getState() Gets the state: x1, vx1, y1, vy1, x2, vx2, y2, vy2, x3, vx3, y3, vy3, t.

Methods inherited from class java.lang.Object

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

Constructor Detail

ThreeBody

public ThreeBody()

Method Detail

draw

public void draw(DrawingPanel panel,
                 java.awt.Graphics g)

Draws the three bodies.

Specified by:

draw in interface Drawable

Parameters:

panel -

g -

doStep

public void doStep()

Steps the time using an ode solver.

getRate

public void getRate(double[] state,
                    double[] rate)

Gets the rate using the given state.

Specified by:

getRate in interface ODE

Parameters:

state - double[]

rate - double[]

getState

public double[] getState()

Gets the state: x1, vx1, y1, vy1, x2, vx2, y2, vy2, x3, vx3, y3, vy3, t.

Specified by:

getState in interface ODE

Returns:

the state