vmm3d.planecurve

Class PlaneCurve

java.lang.Object

vmm3d.core.Exhibit

vmm3d.planecurve.PlaneCurve

All Implemented Interfaces:

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

Direct Known Subclasses:

PlaneCurveParametric

public abstract class PlaneCurve
extends Exhibit

A PlaneCurve represents a curve in the xy-plane that is defined by an array of points. Since a null value in that array is interpreted as a break in the curve, the curve can in fact consist of multiple segments.

Constructor Summary

Constructors

Constructor and Description
PlaneCurve()

Method Summary

Modifier and Type	Method and Description
java.awt.geom.Point2D[]	fillRandomSquare(int numPoints) public Point2D[] fillRandomSquare() puts numPoints random points into a square of edge length 2.
java.awt.geom.Point2D	getPoint(int index) Get one of the points in the point array that defines this curve.
int	getPointCount() Returns the number of points in the Point array for this curve (including any null values).
java.awt.geom.Point2D[]	initializeMovingSquare(int numPoints) initializeMovingSquare(numPoints) Initializes the array MovingSquare[] and its elements only once for each new call of a curve exhibit.

Methods inherited from class vmm3d.core.Exhibit

addChangeListener, addDecoration, addExtraXML, addView, clearDecorations, forceRedraw, getActionsForView, getAdditionalAnimationsForView, getAlternativeViews, getBuildAnimation, getCreateAnimation, getDecorations, getDefaultBackground, getDefaultForeground, getDefaultTransform, getDefaultView, getDefaultWindow, getFramesForMorphing, getMorphingAnimation, 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

PlaneCurve

public PlaneCurve()

Method Detail

getPointCount

public int getPointCount()

Returns the number of points in the Point array for this curve (including any null values). If the point array has not yet been created, because the curve has not yet been drawn, then the return value is zero.

getPoint

public java.awt.geom.Point2D getPoint(int index)

Get one of the points in the point array that defines this curve.

Parameters:

index - the index of the point in the point array. The value must be in the range from 0 to one less than the value returned by getPointCount(), or an error of type NullPointerException or ArrayIndexOutOfBoundsError will occur.

Returns:

the point at the specified index in the point array. This can be null if the specified position in the array holds a null value.

fillRandomSquare

public java.awt.geom.Point2D[] fillRandomSquare(int numPoints)

public Point2D[] fillRandomSquare() puts numPoints random points into a square of edge length 2.

initializeMovingSquare

public java.awt.geom.Point2D[] initializeMovingSquare(int numPoints)

initializeMovingSquare(numPoints) Initializes the array MovingSquare[] and its elements only once for each new call of a curve exhibit. Avoids garbage collection while the dotted square moves along a curve.