org.jscience.mathematics.geometry.polyhedrons
Class PolyhedronDisplayer

java.lang.Object
  java.awt.Component
      java.awt.Container
          java.awt.Panel
              java.applet.Applet
                  org.jscience.mathematics.geometry.polyhedrons.PolyhedronDisplayer

All Implemented Interfaces:

java.awt.event.ActionListener, java.awt.image.ImageObserver, java.awt.MenuContainer, java.io.Serializable, java.lang.Runnable, java.util.EventListener, javax.accessibility.Accessible

public class PolyhedronDisplayer
extends java.applet.Applet
implements java.lang.Runnable, java.awt.event.ActionListener

The class Kaleidoscope is loaded by a web browser or by the Java Applet Viewer. It contains the code decode the HTML parameters and start displaying the applet embedded in the web page.

The relevant HTML fragment is:

<APPLET CODE=kaleido.Kaleidoscope ARCHIVE=scope.jar WIDTH=400 HEIGHT=480>
<PARAM NAME=COLOR VALUE=GR>
<IMG SRC=kaleido.gif BORDER=0>
<BR>
Sorry, you need a Java enabled browser to see this in action...
</APPLET>

The case-nonsensitive applet parameters are:

color

One of more of the letters RGBL. The first three represent a color as a combination of the basic colors red, green and blue. This determines the forefround basic color, with the backgroung being black. If the letter L, light, is specified, the background color is determined by the other letters, and the forground is painted in black. The default colors are white on black.

input

A list of polyhedron symbols. The symbols are seperated a comma, a period, a colon or a semicolon. A valid symbol is a number sign followed by a decimal number between one and eighty, or a Withoff symbol, i.e, three rational numbers and a vertical bar. The default list is given in UniformPolyhedrons.

azimuth

elevation

The direction in space of the rotation axis of the polyhedron. Both are angles, given in degrees. The default values are ¹⁸⁰/₇ and ¹⁸⁰/₁₇, respectively.

In cases that kaleido is run as a full fledged application, the applet is embedded within a Kaleido, and the run parameters are explained there.

The applet archive scope.jar includes all the classes in this package which are necessary to display an applet. This includes the classes PolyhedronDisplayer, Polyhedron, UniformPolyhedrons, Vector3D and Rational. This excludes the classes Kaleido and PolyhedronVRMLOutputter.

See Also:

Class source code, Applet demo, Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class java.applet.Applet

java.applet.Applet.AccessibleApplet

Nested classes/interfaces inherited from class java.awt.Panel

java.awt.Panel.AccessibleAWTPanel

Nested classes/interfaces inherited from class java.awt.Container

java.awt.Container.AccessibleAWTContainer

Nested classes/interfaces inherited from class java.awt.Component

java.awt.Component.AccessibleAWTComponent, java.awt.Component.BaselineResizeBehavior, java.awt.Component.BltBufferStrategy, java.awt.Component.FlipBufferStrategy

Field Summary

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

PolyhedronDisplayer()

Method Summary

void	actionPerformed(java.awt.event.ActionEvent e)
java.lang.String	getAppletInfo()
void	init() Initializes the applet.
void	paint(java.awt.Graphics g) If there is a polylehedron to display, invoke update(java.awt.Graphics).
void	run() The clock thread activity method.
void	start() Start the clock thead.
void	stop() Stop the clock thread.
void	update(java.awt.Graphics g) Update the display by computing the new rotation angle and invoking the Polyhedron.paint(org.jscience.mathematics.geometry.polyhedrons.PolyhedronDisplayer, java.awt.Graphics, double, boolean) method.

Methods inherited from class java.applet.Applet

destroy, getAccessibleContext, 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, addImpl, addPropertyChangeListener, addPropertyChangeListener, applyComponentOrientation, areFocusTraversalKeysSet, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getAlignmentX, getAlignmentY, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getComponentZOrder, getContainerListeners, getFocusTraversalKeys, getFocusTraversalPolicy, getInsets, getLayout, getListeners, getMaximumSize, getMinimumSize, getMousePosition, getPreferredSize, insets, invalidate, isAncestorOf, isFocusCycleRoot, isFocusCycleRoot, isFocusTraversalPolicyProvider, isFocusTraversalPolicySet, layout, list, list, locate, minimumSize, paintComponents, paramString, preferredSize, print, printComponents, processContainerEvent, processEvent, remove, remove, removeAll, removeContainerListener, removeNotify, setComponentZOrder, setFocusCycleRoot, setFocusTraversalKeys, setFocusTraversalPolicy, setFocusTraversalPolicyProvider, setFont, setLayout, 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, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, getBackground, getBaseline, getBaselineResizeBehavior, 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, getMousePosition, 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, isMaximumSizeSet, isMinimumSizeSet, isOpaque, isPreferredSizeSet, 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, setMaximumSize, setMinimumSize, setName, setPreferredSize, 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

Constructor Detail

PolyhedronDisplayer

public PolyhedronDisplayer()

Method Detail

init

public void init()

Initializes the applet. Invoked by the applet browser and by the Kaleido constructor. Reads the applet parametes, sets the display colors, and build the display buttons.

Overrides:

init in class java.applet.Applet

See Also:

Color, Button

getAppletInfo

public java.lang.String getAppletInfo()

Overrides:

getAppletInfo in class java.applet.Applet

actionPerformed

public void actionPerformed(java.awt.event.ActionEvent e)

Specified by:

actionPerformed in interface java.awt.event.ActionListener

start

public void start()

Start the clock thead. Compensating for lost time in pausing periods.

Overrides:

start in class java.applet.Applet

See Also:

Thread.start()

stop

public void stop()

Stop the clock thread.

Overrides:

stop in class java.applet.Applet

run

public void run()

The clock thread activity method. Repaints the screen 10 times in a second.

Specified by:

run in interface java.lang.Runnable

paint

public void paint(java.awt.Graphics g)

If there is a polylehedron to display, invoke update(java.awt.Graphics).

Overrides:

paint in class java.awt.Container

update

public void update(java.awt.Graphics g)

Update the display by computing the new rotation angle and invoking the Polyhedron.paint(org.jscience.mathematics.geometry.polyhedrons.PolyhedronDisplayer, java.awt.Graphics, double, boolean) method. The angle is conmputed from the system clock, compensating for pausing periods, and a rate of 1 revolution in 5 seconds (12 RPM).

Overrides:

update in class java.awt.Container