vgp.tutor.rootFinder
Class PjRootFinder

java.lang.Object
  |
  +--jv.object.PsObject
        |
        +--jv.project.PjProject
              |
              +--vgp.tutor.rootFinder.PjRootFinder

All Implemented Interfaces:

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

public class PjRootFinder

extends PjProject

Demo project to find roots of real-valued functions of one variable. Function expression may be interactively edited.

Version:

05.12.00, 1.10 revised (kp) Instance variable m_rootFinder replaced with static class.
03.10.99, 1.00 created (kp)

Author:

Konrad Polthier

See Also:

PnRootFinder, Serialized Form

Field Summary

protected PuInteger	m_discr Discretization of polygon for display purpose only.
protected PuFunction	m_fx Currently active function as typed by user.
protected PgPolygon	m_graph Graph of function.
protected PgPointSet	m_root Roots of function as poit set.
protected PuDouble	m_xMax Right interval border of shown graph.
protected PuDouble	m_xMin Left interval border of shown graph.

Fields inherited from class jv.project.PjProject

m_anim, m_bAutoFit, m_display, m_displayList, m_geometry, m_parm, m_rootGeometry

Fields inherited from class jv.object.PsObject

HAS_CONFIG_PANEL, HAS_INFO_PANEL, HAS_MATERIAL_PANEL, INSPECTOR_INFO, INSPECTOR_INFO_EXT, IS_DELETED, IS_FIXED, IS_SELECTED, IS_USED, m_infoPanel, m_name, m_panelList, m_parent, m_tag, m_updateList, NUM_TAGS

Constructor Summary

PjRootFinder()

Method Summary

void	computeGraph() Compute planar graph of function expression.
void	findRoot() Compute roots of function in a specified interval.
void	init() Initialize and reset project, stops the running animation if any.
void	setEquation(java.lang.String eq) Set function expression from outside the project.
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, getViewer, hasAnimation, hasDisplay, isEnabledAutoFit, markVertices, pickDisplay, pickInitial, pickVertex, removeDisplay, removeGeometries, removeGeometry, selectDisplay, selectGeometry, setAnimation, setDisplay, setEnabledAutoFit, setParameter, setTime, setViewer, stop, unmarkVertices

Methods inherited from class jv.object.PsObject

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

Methods inherited from class java.lang.Object

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

Methods inherited from interface jv.anim.PsTimeListenerIf

getName

Methods inherited from interface jv.project.PvPickListenerIf

getName

Methods inherited from interface jv.object.PsUpdateIf

getFather, getName, setParent

Field Detail

m_graph

protected PgPolygon m_graph

Graph of function.

m_root

protected PgPointSet m_root

Roots of function as poit set.

m_fx

protected PuFunction m_fx

Currently active function as typed by user.

m_discr

protected PuInteger m_discr

Discretization of polygon for display purpose only.

m_xMin

protected PuDouble m_xMin

Left interval border of shown graph.

m_xMax

protected PuDouble m_xMax

Right interval border of shown graph.

Constructor Detail

PjRootFinder

public PjRootFinder()

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

Following copied from class: jv.project.PjProject

See Also:

PvViewerIf.start(), #isEnabledAutoFit(boolean)

setEquation

public void setEquation(java.lang.String eq)

Set function expression from outside the project.

computeGraph

public void computeGraph()

Compute planar graph of function expression.

findRoot

public void findRoot()

Compute roots of function in a specified interval. Method just invokes a numerical algorithm, and assigns roots to pointset of roots.

update

public boolean update(java.lang.Object event)

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

Overrides:

update in class PsObject

Following copied from interface: jv.object.PsUpdateIf

Parameters:

event - carries a lot of information

Returns:

true if event has been handled, otherwise false

See Also:

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