vgp.curve.cycloid

Class PjCycloid

java.lang.Object

jv.object.PsObject

jv.project.PjProject

vgp.curve.cycloid.PjCycloid

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, PsTimeListenerIf, PsUpdateIf, PvPickListenerIf

public class PjCycloid
extends PjProject

Generate a cycloid by tracing a point on a disk which rolls along an axis. Optionally, the cycloid curve may be rotated around the axis.

See Also:

Serialized Form

Author:

Konrad Polthier

Version:

25.07.03, 2.00 revised (kp) Update and recomputation simplified.
08.11.99, 1.00 created (kp)

Field Summary

Fields inherited from class jv.object.PsObject

HAS_BOUNDARY_PANEL, HAS_CONFIG_PANEL, HAS_INFO_PANEL, HAS_LABEL_PANEL, HAS_MATERIAL_PANEL, HAS_TEXTURE_PANEL, HAS_VECTOR_PANEL, INSPECTOR_INFO, INSPECTOR_INFO_EXT, IS_DELETED, IS_FIXED, IS_FOCUSSED, IS_PICKED, IS_SELECTED, IS_USED, NUM_TAGS

Constructor Summary

Constructors

Constructor and Description
PjCycloid()

Method Summary

Modifier and Type	Method and Description
PgPolygon	getCycloid() Get the cycloid curve.
int	getCycloidDiscr() Get number of points on cycloid curve.
double	getCycloidLength() Get length of the cycloid curve.
double	getDistance() Get distance of the traced point to the center of the rolling disk, that means, the length of the stick.
void	init() Initialize and reset project, stops the running animation if any.
void	reset() Reset project to initial state.
void	setCycloidDiscr(int cycloidDiscr) Set number of points on cycloid curve.
void	setCycloidLength(double len) Set distance of traced point to center of rolling ball.
void	setDistance(double d) Set distance of the traced point to the center of the rolling disk, that means, the length of the stick.
boolean	setTime(PsTimeEvent timeEvent) Recompute the project whenever the time has changed.
void	start() Method is invoked during loading of a project in JavaView.
boolean	update(java.lang.Object event) Update the class whenever a child has changed.

Methods inherited from class jv.project.PjProject

addDisplay, addGeometry, addGeometry, dispose, dragDisplay, dragInitial, dragVertex, fitDisplays, getAnimation, getDisplay, getDisplays, getGeometry, getGeometry, getNumGeometries, getParameter, getParameterInfo, getViewer, hasAnimation, hasDisplay, isEnabledAutoFit, markVertices, pickDisplay, pickInitial, pickVertex, removeDisplay, removeGeometries, removeGeometry, selectDisplay, selectGeometry, setAnimation, setBackColor, setBorderType, setDisplay, setEnabledAutoFit, setGeometry, setParameterInfo, setViewer, stop, unmarkVertices

Methods inherited from class jv.object.PsObject

addInspector, addUpdateListener, assureInspector, clearTag, clone, clone, clone, copy, getFather, getInfoPanel, getInspector, getName, getNumObjects, getSymbol, hasInspector, hasTag, hasUpdateListener, instanceOf, instanceOf, newInspector, newInspector, removeInspector, removeInspector, removeUpdateListener, setName, setParent, setSymbol, setTag, toString, updatePanels

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface jv.anim.PsTimeListenerIf

getName

Methods inherited from interface jv.project.PvPickListenerIf

getName

Constructor Detail

PjCycloid

public PjCycloid()

Method Detail

init

public void init()

Description copied from class: PjProject

Initialize and reset project, stops the running animation if any. Does not reset any registered display nor geometry. They must be reset individually in each subclass.

Overrides:

init in class PjProject

start

public void start()

Description copied from class: PjProject

Method is invoked during loading of a project in JavaView.

If a project has an animation object, then the animation panel is shown when the project's this start() method is invoked during loading of the project. Use setAnimation(PsAnimation) to register an animation.

If auto fit is enabled then scenery is scaled to fit in each display.

Overrides:

start in class PjProject

See Also:

PvViewerIf.start(), PjProject.isEnabledAutoFit()

reset

public void reset()

Reset project to initial state. Method calls project.init(). Must call project.update(project) after calling reset().

update

public boolean update(java.lang.Object event)

Update the class whenever a child has changed. Method is usually invoked from the children.

Specified by:

update in interface PsUpdateIf

Overrides:

update in class PsObject

Parameters:

event - carries a lot of information

Returns:

true if event has been handled, otherwise false

See Also:

PsObject.setParent(PsUpdateIf), PsObject.getFather(), PsObject.addUpdateListener(PsUpdateIf)

setTime

public boolean setTime(PsTimeEvent timeEvent)

Recompute the project whenever the time has changed.

Specified by:

setTime in interface PsTimeListenerIf

Overrides:

setTime in class PjProject

getCycloid

public PgPolygon getCycloid()

Get the cycloid curve. Note, the coordinates of the curve are recomputed whenever parameters of this project or the project itself change.

getCycloidDiscr

public int getCycloidDiscr()

Get number of points on cycloid curve.

setCycloidDiscr

public void setCycloidDiscr(int cycloidDiscr)

Set number of points on cycloid curve.

Parameters:

cycloidDiscr - number of vertices on cycloid curve

getCycloidLength

public double getCycloidLength()

Get length of the cycloid curve.

setCycloidLength

public void setCycloidLength(double len)

Set distance of traced point to center of rolling ball.

Parameters:

len - distance of point to center of disc

getDistance

public double getDistance()

Get distance of the traced point to the center of the rolling disk, that means, the length of the stick.

setDistance

public void setDistance(double d)

Set distance of the traced point to the center of the rolling disk, that means, the length of the stick.

Parameters:

d - distance of point to center of the