org.opensourcephysics.display
Class TrailBezier

java.lang.Object
  org.opensourcephysics.display.AbstractTrail
      org.opensourcephysics.display.TrailBezier

All Implemented Interfaces:

Drawable, Measurable

Direct Known Subclasses:

TrailSmart

public class TrailBezier
extends AbstractTrail

TrailBezier defines a trail of points connected by a Bezier spline. This object is often used to show the path of a moving object.

Version:

1.0

Author:

Wolfgang Christian

Field Summary

Fields inherited from class org.opensourcephysics.display.AbstractTrail

closed, color, drawingStroke, enableMeasure, numpts, xmax, xmaxLogscale, xmin, xminLogscale, ymax, ymaxLogscale, ymin, yminLogscale

Constructor Summary

TrailBezier()

Method Summary

void	addPoint(double x, double y) Adds a point to the trail.
void	clear() Clears all points from the trail.
void	closeTrail() Closes the trail by connecting the first point to the last point.
void	draw(DrawingPanel panel, java.awt.Graphics g) Draw the trail on the panel.
protected void	drawPathEnd(DrawingPanel panel, java.awt.Graphics2D g2) Draws the points that have not yet been added to the spline.
static XML.ObjectLoader	getLoader() Returns the XML.ObjectLoader for this class.
double	getXMax() Gets the maximum x value in the trail.
double	getXMin() Gets the minimum x value in the trail.
double	getYMax() Gets the maximum y value in the trail.
double	getYMin() Gets the minimum y value in the trail.
boolean	isMeasured() Determines if this trail scales the drawing panel.
void	setSlack(double slack) Sets the slack which determines the position of the control points.

Methods inherited from class org.opensourcephysics.display.AbstractTrail

getNumberOfPoints, getStroke, getXMaxLogscale, getXMinLogscale, getYMaxLogscale, getYMinLogscale, setDashedStroke, setMeasured, setStroke

Methods inherited from class java.lang.Object

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

Constructor Detail

TrailBezier

public TrailBezier()

Method Detail

addPoint

public void addPoint(double x,
                     double y)

Adds a point to the trail.

Specified by:

addPoint in class AbstractTrail

Parameters:

x - double

y - double

setSlack

public void setSlack(double slack)

Sets the slack which determines the position of the control points.

Parameters:

slack - double

closeTrail

public void closeTrail()

Closes the trail by connecting the first point to the last point.

Specified by:

closeTrail in class AbstractTrail

clear

public void clear()

Clears all points from the trail.

Specified by:

clear in class AbstractTrail

draw

public void draw(DrawingPanel panel,
                 java.awt.Graphics g)

Draw the trail on the panel.

Parameters:

g -

drawPathEnd

protected void drawPathEnd(DrawingPanel panel,
                           java.awt.Graphics2D g2)

Draws the points that have not yet been added to the spline.

Parameters:

panel - DrawingPanel

g2 - Graphics2D

getLoader

public static XML.ObjectLoader getLoader()

Returns the XML.ObjectLoader for this class.

Returns:

the object loader

isMeasured

public boolean isMeasured()

Determines if this trail scales the drawing panel.

Specified by:

isMeasured in interface Measurable

Overrides:

isMeasured in class AbstractTrail

Returns:

boolean

getXMin

public double getXMin()

Gets the minimum x value in the trail.

Specified by:

getXMin in interface Measurable

Overrides:

getXMin in class AbstractTrail

Returns:

double

getXMax

public double getXMax()

Gets the maximum x value in the trail.

Specified by:

getXMax in interface Measurable

Overrides:

getXMax in class AbstractTrail

Returns:

double

getYMin

public double getYMin()

Gets the minimum y value in the trail.

Specified by:

getYMin in interface Measurable

Overrides:

getYMin in class AbstractTrail

Returns:

double

getYMax

public double getYMax()

Gets the maximum y value in the trail.

Specified by:

getYMax in interface Measurable

Overrides:

getYMax in class AbstractTrail

Returns:

double