vgp.curve.deCasteljau

Class PjDeCasteljau

java.lang.Object

jv.object.PsObject

jv.project.PjProject

vgp.curve.deCasteljau.PjDeCasteljau

All Implemented Interfaces:

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

public class PjDeCasteljau
extends PjProject

Visualization of the de Casteljau algorithm where a control polygon produces a polynomial Bezier curve. Intermediate steps and evaluation position may be animated.

See Also:

Serialized Form

Author:

Konrad Polthier

Version:

03.11.06, 2.00 revised (kp) Package moved to vgp.curve.deCasteljau from dev.app.deCasteljau.
05.10.04, 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
PjDeCasteljau()

Method Summary

Modifier and Type	Method and Description
void	compute(double t) Evaluate Bezier curve at given argument value.
double	getPosition() Get current position in [0,1] where bezier curve is evaluated.
void	init() Initialize and reset project, stops the running animation if any.
void	setPosition(double time) Set current position in [0,1] where bezier curve is evaluated.
void	start() Add geometries to display and enable xy-projection.
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, setTime, 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

PjDeCasteljau

public PjDeCasteljau()

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()

Add geometries to display and enable xy-projection.

Overrides:

start in class PjProject

See Also:

PvViewerIf.start(), PjProject.isEnabledAutoFit()

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)

compute

public void compute(double t)

Evaluate Bezier curve at given argument value.

Parameters:

t - position in [0,1] where Bezier curve is evaluated.

getPosition

public double getPosition()

Get current position in [0,1] where bezier curve is evaluated.

setPosition

public void setPosition(double time)

Set current position in [0,1] where bezier curve is evaluated.