Class Turntable

java.lang.Object
  |
  +--java.awt.Component
        |
        +--java.awt.Container
              |
              +--java.awt.Panel
                    |
                    +--java.applet.Applet
                          |
                          +--javax.swing.JApplet
                                |
                                +--Turntable

All Implemented Interfaces:

Accessible, ImageObserver, MenuContainer, RootPaneContainer, Runnable, Serializable

public class Turntable

extends JApplet

implements Runnable

Turntable simulation applet.

See Also:

Serialized Form

Nested Class Summary

class	Turntable.FloatSlider Slider that only has values between 0 and 1.
class	Turntable.TurntablePanel Draws a diagram of the turntable.

Field Summary

private float	angularMomentum Angular momentum of system.
private static float	DELTA_TIME_PAUSE Milliseconds that pass each simulation frame when it is paused.
private static float	DELTA_TIME_PLAY Milliseconds that pass each simulation frame when it is playing.
private float	deltaTime Milliseconds that pass each simulation frame.
private static float	FAN_HEIGHT Height of fan ellipse.
private static float	FAN_WIDTH Width of fan ellipse.
private Turntable.FloatSlider	fanAngleSlider Fan angle slider.
private float	fanForce Force exert by fan.
private Turntable.FloatSlider	fanForceSlider Fan force slider.
private float	fanPositionX X polar co-ordinate of fan on turntable.
private float	fanPositionY Y polar co-ordinate of fan on turntable.
private Turntable.FloatSlider	fanRadiusSlider Fan distance from turntable center slider.
private static int	FRAME_DELAY Millisecond delay between each frame.
private JTextArea	informationText Text area containing information about turntable.
private static float	MASS_MASS Mass of point mass.
private float	massPositionX X polar co-ordinate of mass on turntable.
private float	massPositionY Y polar co-ordinate of mass on turntable.
private float	massRadius Mass representation radius.
private Turntable.FloatSlider	massRadiusSlider Mass distance from turntable center slider.
private static float	MAX_FAN_FORCE Maximum force fan can exert.
private static DecimalFormat	numberFormat Number format for displaying values.
private float	orientation Orientation of the turntable.
private static RenderingHints	renderHints Rendering hints to turn on antialiasing.
private static String	STRING_ALMOST_EQUAL Almost equal symbol.
private static String	STRING_ANGULAR_ACCELERATION Angular acceleration symbol.
private static String	STRING_ANGULAR_VELOCITY Angular velocity symbol.
private static String	STRING_DEGREES Degrees symbol.
private static String	STRING_DELTA Delta symbol.
private static String	STRING_INVERSE Inverse symbol.
private static String	STRING_INVERSE_SQUARED Inverse squared symbol.
private static String	STRING_SQUARED Squared symbol.
private static String	STRING_THETA Theta symbol.
private static String	STRING_TIMES Multiplication symbol.
private static String	STRING_TORQUE Torque symbol.
private Turntable.TurntablePanel	turntableDiagram Diagram of turntable.
private float	turntableMomentOfInteria Moment of inertia of turntable.
private float	turntableRadius Turntable radius.
private Thread	updateThread Thread to update simulation.
private String	valueFanAngle Value of fan angle.
private String	valueFanForce Value of fan force.
private String	valueFanPosition Value of fan position.
private String	valueMassPosition Value of mass position.

Fields inherited from class javax.swing.JApplet

accessibleContext, rootPane, rootPaneCheckingEnabled

Fields inherited from class java.applet.Applet

Fields inherited from class java.awt.Panel

Fields inherited from class java.awt.Container

Fields inherited from class java.awt.Component

BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT

Fields inherited from interface java.awt.image.ImageObserver

ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH

Constructor Summary

Turntable()

Method Summary

void	destroy() Stops update thread
static String	format(float number) Returns formatted number.
String	getAppletInfo() Returns applet information
void	init() Initialises applet
void	run() Updates simulation
void	start() Starts update thread
void	stop() Stops update thread
void	updateSimulation() Updates simulation by one step.
void	updateSliders() Updates all slider labels with new values and sets simulation values.

Methods inherited from class javax.swing.JApplet

addImpl, createRootPane, getAccessibleContext, getContentPane, getGlassPane, getJMenuBar, getLayeredPane, getRootPane, isRootPaneCheckingEnabled, paramString, remove, setContentPane, setGlassPane, setJMenuBar, setLayeredPane, setLayout, setRootPane, setRootPaneCheckingEnabled, update

Methods inherited from class java.applet.Applet

getAppletContext, getAudioClip, getAudioClip, getCodeBase, getDocumentBase, getImage, getImage, getLocale, getParameter, getParameterInfo, isActive, newAudioClip, play, play, resize, resize, setStub, showStatus

Methods inherited from class java.awt.Panel

addNotify

Methods inherited from class java.awt.Container

add, add, add, add, add, addContainerListener, addPropertyChangeListener, addPropertyChangeListener, applyComponentOrientation, areFocusTraversalKeysSet, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getAlignmentX, getAlignmentY, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getContainerListeners, getFocusTraversalKeys, getFocusTraversalPolicy, getInsets, getLayout, getListeners, getMaximumSize, getMinimumSize, getPreferredSize, insets, invalidate, isAncestorOf, isFocusCycleRoot, isFocusCycleRoot, isFocusTraversalPolicySet, layout, list, list, locate, minimumSize, paint, paintComponents, preferredSize, print, printComponents, processContainerEvent, processEvent, remove, removeAll, removeContainerListener, removeNotify, setFocusCycleRoot, setFocusTraversalKeys, setFocusTraversalPolicy, setFont, transferFocusBackward, transferFocusDownCycle, validate, validateTree

Methods inherited from class java.awt.Component

action, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, addMouseWheelListener, bounds, checkImage, checkImage, coalesceEvents, contains, contains, createImage, createImage, createVolatileImage, createVolatileImage, disable, disableEvents, dispatchEvent, enable, enable, enableEvents, enableInputMethods, firePropertyChange, firePropertyChange, firePropertyChange, getBackground, getBounds, getBounds, getColorModel, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusCycleRootAncestor, getFocusListeners, getFocusTraversalKeysEnabled, getFont, getFontMetrics, getForeground, getGraphics, getGraphicsConfiguration, getHeight, getHierarchyBoundsListeners, getHierarchyListeners, getIgnoreRepaint, getInputContext, getInputMethodListeners, getInputMethodRequests, getKeyListeners, getLocation, getLocation, getLocationOnScreen, getMouseListeners, getMouseMotionListeners, getMouseWheelListeners, getName, getParent, getPeer, getPropertyChangeListeners, getPropertyChangeListeners, getSize, getSize, getToolkit, getTreeLock, getWidth, getX, getY, gotFocus, handleEvent, hasFocus, hide, imageUpdate, inside, isBackgroundSet, isCursorSet, isDisplayable, isDoubleBuffered, isEnabled, isFocusable, isFocusOwner, isFocusTraversable, isFontSet, isForegroundSet, isLightweight, isOpaque, isShowing, isValid, isVisible, keyDown, keyUp, list, list, list, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, postEvent, prepareImage, prepareImage, printAll, processComponentEvent, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processKeyEvent, processMouseEvent, processMouseMotionEvent, processMouseWheelEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, repaint, requestFocus, requestFocus, requestFocusInWindow, requestFocusInWindow, reshape, setBackground, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setEnabled, setFocusable, setFocusTraversalKeysEnabled, setForeground, setIgnoreRepaint, setLocale, setLocation, setLocation, setName, setSize, setSize, setVisible, show, show, size, toString, transferFocus, transferFocusUpCycle

Methods inherited from class java.lang.Object

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

Field Detail

renderHints

private static RenderingHints renderHints

Rendering hints to turn on antialiasing.

numberFormat

private static DecimalFormat numberFormat

Number format for displaying values.

FRAME_DELAY

private static int FRAME_DELAY

Millisecond delay between each frame.

DELTA_TIME_PLAY

private static float DELTA_TIME_PLAY

Milliseconds that pass each simulation frame when it is playing.

DELTA_TIME_PAUSE

private static float DELTA_TIME_PAUSE

Milliseconds that pass each simulation frame when it is paused.

STRING_DELTA

private static String STRING_DELTA

Delta symbol.

STRING_TORQUE

private static String STRING_TORQUE

Torque symbol.

STRING_ANGULAR_ACCELERATION

private static String STRING_ANGULAR_ACCELERATION

Angular acceleration symbol.

STRING_ANGULAR_VELOCITY

private static String STRING_ANGULAR_VELOCITY

Angular velocity symbol.

STRING_SQUARED

private static String STRING_SQUARED

Squared symbol.

STRING_INVERSE

private static String STRING_INVERSE

Inverse symbol.

STRING_INVERSE_SQUARED

private static String STRING_INVERSE_SQUARED

Inverse squared symbol.

STRING_THETA

private static String STRING_THETA

Theta symbol.

STRING_TIMES

private static String STRING_TIMES

Multiplication symbol.

STRING_ALMOST_EQUAL

private static String STRING_ALMOST_EQUAL

Almost equal symbol.

STRING_DEGREES

private static String STRING_DEGREES

Degrees symbol.

FAN_WIDTH

private static float FAN_WIDTH

Width of fan ellipse.

FAN_HEIGHT

private static float FAN_HEIGHT

Height of fan ellipse.

MASS_MASS

private static float MASS_MASS

Mass of point mass.

MAX_FAN_FORCE

private static float MAX_FAN_FORCE

Maximum force fan can exert.

turntableRadius

private float turntableRadius

Turntable radius.

massRadius

private float massRadius

Mass representation radius.

fanForce

private float fanForce

Force exert by fan.

orientation

private float orientation

Orientation of the turntable.

angularMomentum

private float angularMomentum

Angular momentum of system.

turntableMomentOfInteria

private float turntableMomentOfInteria

Moment of inertia of turntable.

deltaTime

private float deltaTime

Milliseconds that pass each simulation frame.

fanPositionX

private float fanPositionX

X polar co-ordinate of fan on turntable.

fanPositionY

private float fanPositionY

Y polar co-ordinate of fan on turntable.

massPositionX

private float massPositionX

X polar co-ordinate of mass on turntable.

massPositionY

private float massPositionY

Y polar co-ordinate of mass on turntable.

turntableDiagram

private Turntable.TurntablePanel turntableDiagram

Diagram of turntable.

fanForceSlider

private Turntable.FloatSlider fanForceSlider

Fan force slider.

fanAngleSlider

private Turntable.FloatSlider fanAngleSlider

Fan angle slider.

fanRadiusSlider

private Turntable.FloatSlider fanRadiusSlider

Fan distance from turntable center slider.

massRadiusSlider

private Turntable.FloatSlider massRadiusSlider

Mass distance from turntable center slider.

informationText

private JTextArea informationText

Text area containing information about turntable.

valueFanAngle

private String valueFanAngle

Value of fan angle.

valueFanForce

private String valueFanForce

Value of fan force.

valueMassPosition

private String valueMassPosition

Value of mass position.

valueFanPosition

private String valueFanPosition

Value of fan position.

updateThread

private Thread updateThread

Thread to update simulation.

Constructor Detail

Turntable

public Turntable()

Method Detail

init

public void init()

Initialises applet

Overrides:

init in class Applet

format

public static String format(float number)

Returns formatted number.

updateSliders

public void updateSliders()

Updates all slider labels with new values and sets simulation values.

updateSimulation

public void updateSimulation()

Updates simulation by one step.

run

public void run()

Updates simulation

Specified by:

run in interface Runnable

start

public void start()

Starts update thread

Overrides:

start in class Applet

stop

public void stop()

Stops update thread

Overrides:

stop in class Applet

destroy

public void destroy()

Stops update thread

Overrides:

destroy in class Applet

getAppletInfo

public String getAppletInfo()

Returns applet information

Overrides:

getAppletInfo in class Applet