org.opensourcephysics.media.core
Class TrackableCircle

java.lang.Object
  org.opensourcephysics.display.Circle
      org.opensourcephysics.media.core.TrackableCircle

All Implemented Interfaces:

Drawable, Trackable

public class TrackableCircle
extends Circle
implements Trackable

This is a circle that implements the Trackable interface and is associated with a single video frame. The draw method illustrates the process of transforming imagespace to worldspace coordinates.

Version:

1.0

Author:

Douglas Brown

Field Summary

protected int

n

Fields inherited from class org.opensourcephysics.display.Circle

color, pixRadius, x, y

Constructor Summary

TrackableCircle(int n, double imageX, double imageY)
Constructs a TrackableCircle.

Method Summary

void	draw(DrawingPanel panel, java.awt.Graphics g) Overrides the Circle draw method.
int	getFrameNumber() Gets the frame number.

Methods inherited from class org.opensourcephysics.display.Circle

getLoader, getX, getY, setX, setXY, setY, toString

Methods inherited from class java.lang.Object

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

Field Detail

n

protected int n

Constructor Detail

TrackableCircle

public TrackableCircle(int n,
                       double imageX,
                       double imageY)

Constructs a TrackableCircle.

Parameters:

n - the video frame number

imageX - the x position in imagespace

imageY - the y position in imagespace

Method Detail

getFrameNumber

public int getFrameNumber()

Gets the frame number.

Returns:

the frame number

draw

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

Overrides the Circle draw method.

Specified by:

draw in interface Drawable

Overrides:

draw in class Circle

Parameters:

panel - the drawing panel requesting the drawing

g - the graphics context on which to draw