org.opensourcephysics.sip.ch05
Class Planet2

java.lang.Object
  org.opensourcephysics.sip.ch05.Planet2

All Implemented Interfaces:

Drawable, ODE

public class Planet2
extends java.lang.Object
implements Drawable, ODE

Planet2 models two interacting planets in the presence of a central inverse square law force.

Constructor Summary

Planet2()

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, t.

Methods inherited from class java.lang.Object

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

Constructor Detail

Planet2

public Planet2()

Method Detail

doStep

public void doStep()

Steps the time using an ode solver.

draw

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

Draws the three bodies.

Specified by:

draw in interface Drawable

Parameters:

panel -

g -

getRate

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

Gets the rate using the given state. Values in the rate array are overwritten.

Specified by:

getRate in interface ODE

Parameters:

state - the state

rate - the resulting rate

getState

public double[] getState()

Gets the state: x1, vx1, y1, vy1, x2, vx2, y2, vy2, t.

Specified by:

getState in interface ODE

Returns:

the state