vmm3d.planecurve.parametric

Class Parabola

java.lang.Object

vmm3d.core.Exhibit

vmm3d.planecurve.PlaneCurve

vmm3d.planecurve.parametric.PlaneCurveParametric

vmm3d.planecurve.parametric.ConicSection

vmm3d.planecurve.parametric.Parabola

All Implemented Interfaces:

java.util.EventListener, javax.swing.event.ChangeListener, Decorateable, Parameterizable

public class Parabola
extends ConicSection

A parabola with a focus on the x-axis. The parabola is defined by its focal length.

Nested Class Summary

Nested classes/interfaces inherited from class vmm3d.planecurve.parametric.PlaneCurveParametric

PlaneCurveParametric.PlaneCurveParametricView

Constructor Summary

Constructors

Constructor and Description
Parabola() Construct a parabola with a focus initially at the point (0.75.0).

Method Summary

Modifier and Type	Method and Description
ActionList	getActionsForView(View view) Returns a list of actions that are applicable to the exhibit.
double	x2ndDerivativeValue(double t) Computes x''(t) for a given value of t.
double	xDerivativeValue(double t) Computes x'(t) for a given value of t.
double	xValue(double t) Computes x(t) for a given value of t.
double	y2ndDerivativeValue(double t) Computes y''(t) for a given value of t.
double	yDerivativeValue(double t) Computes y'(t) for a given value of t.
double	yValue(double t) Computes y(t) for a given value of t.

Methods inherited from class vmm3d.planecurve.parametric.ConicSection

getCreateAnimation, getMorphingAnimation

Methods inherited from class vmm3d.planecurve.parametric.PlaneCurveParametric

doDraw, getDefaultView, getT, getTResolution, myCircle

Methods inherited from class vmm3d.planecurve.PlaneCurve

fillRandomSquare, getPoint, getPointCount, initializeMovingSquare

Methods inherited from class vmm3d.core.Exhibit

addChangeListener, addDecoration, addExtraXML, addView, clearDecorations, forceRedraw, getAdditionalAnimationsForView, getAlternativeViews, getBuildAnimation, getDecorations, getDefaultBackground, getDefaultForeground, getDefaultTransform, getDefaultWindow, getFramesForMorphing, getName, getParameterByName, getParameters, getSettingsCommandsForView, getTitle, getUseFilmstripForMorphing, getViews, parameterChanged, readExtraXML, removeChangeListener, removeDecoration, removeView, render, setDefaultBackground, setDefaultForeground, setDefaultWindow, setDefaultWindow, setFramesForMorphing, setName, setUseFilmstripForMorphing, stateChanged

Methods inherited from class java.lang.Object

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

Constructor Detail

Parabola

public Parabola()

Construct a parabola with a focus initially at the point (0.75.0). The focal length is an animateable parameter with animation start and end values initially set to 0.5 and 1.5. The parabola is acutally computed using the parametric equations (t,t*t/(4*f)), where f is the focal length and t ranges from -8 to 8.

Method Detail

xValue

public double xValue(double t)

Description copied from class: PlaneCurveParametric

Computes x(t) for a given value of t.

Specified by:

xValue in class PlaneCurveParametric

yValue

public double yValue(double t)

Description copied from class: PlaneCurveParametric

Computes y(t) for a given value of t.

Specified by:

yValue in class PlaneCurveParametric

xDerivativeValue

public double xDerivativeValue(double t)

Description copied from class: PlaneCurveParametric

Computes x'(t) for a given value of t. The default version defined in this class computes an approximate value numerically, using values of the function itself at points near t.

Overrides:

xDerivativeValue in class PlaneCurveParametric

yDerivativeValue

public double yDerivativeValue(double t)

Description copied from class: PlaneCurveParametric

Computes y'(t) for a given value of t. The default version defined in this class computes an approximate value numerically, using values of the function itself at points near t.

Overrides:

yDerivativeValue in class PlaneCurveParametric

x2ndDerivativeValue

public double x2ndDerivativeValue(double t)

Description copied from class: PlaneCurveParametric

Computes x''(t) for a given value of t. The default version defined in this class computes an approximate value numerically, using values of the function itself at points near t.

Overrides:

x2ndDerivativeValue in class PlaneCurveParametric

y2ndDerivativeValue

public double y2ndDerivativeValue(double t)

Description copied from class: PlaneCurveParametric

Computes y''(t) for a given value of t. The default version defined in this class computes an approximate value numerically, using values of the function itself at points near t.

Overrides:

y2ndDerivativeValue in class PlaneCurveParametric

getActionsForView

public ActionList getActionsForView(View view)

Returns a list of actions that are applicable to the exhibit. To the actions set up by the superclass, this adds a "Drag Mouse to Show Normals" action that lets the user drag the mouse and draws all normal vectors of the parabola that pass through the mouse location.

Overrides:

getActionsForView in class PlaneCurveParametric

Parameters:

view - The view for which the actions should apply. If this is null, then no new actions are added to those inherited from the superclass.