org.opensourcephysics.sip.ch18
Class ContractedRing

java.lang.Object
  org.opensourcephysics.sip.ch18.ContractedRing

All Implemented Interfaces:

Drawable

Direct Known Subclasses:

ObservedRing

public class ContractedRing
extends java.lang.Object
implements Drawable

ContractedRing models the Lorentz-Fitzgerald contraction of a ring moving in the x direction.

Constructor Summary

ContractedRing(double x0, double y0, double vx, int numberOfPoints)
ContractedRing models the shape of a ring at relativistic speeds.

Method Summary

void	draw(DrawingPanel panel, java.awt.Graphics g) Draws the contracted circle.
void	setTime(double t) Sets the time and translates the shape to its position at the given time.

Methods inherited from class java.lang.Object

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

Constructor Detail

ContractedRing

public ContractedRing(double x0,
                      double y0,
                      double vx,
                      int numberOfPoints)

ContractedRing models the shape of a ring at relativistic speeds.

Parameters:

x0 - double initial center x coordinate

y0 - double initial center y coordinate

vx - double x velocity

numPts - int number of points for rendering

Method Detail

setTime

public void setTime(double t)

Sets the time and translates the shape to its position at the given time.

Parameters:

t - double the time

draw

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

Draws the contracted circle.

Specified by:

draw in interface Drawable

Parameters:

panel - DrawingPanel

g - Graphics