org.opensourcephysics.display
Class TrailSmart

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

All Implemented Interfaces:

Drawable, Measurable

public class TrailSmart
extends TrailBezier

TrailSmart adds points to a Bezier trail only if the new point deviates from a straight line. The smart trail algorithm minimizes the number of points drawn.

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

TrailSmart()

Method Summary

void	addPoint(double x, double y) Adds a point to the trail.
protected void	drawPathEnd(DrawingPanel panel, java.awt.Graphics2D g2) Draws the points that have not yet been added to the Bezier spline.
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.
void	setMaxError(double max) Sets the maximum error.

Methods inherited from class org.opensourcephysics.display.TrailBezier

clear, closeTrail, draw, getLoader, isMeasured, setSlack

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

TrailSmart

public TrailSmart()

Method Detail

setMaxError

public void setMaxError(double max)

Sets the maximum error.

Parameters:

max - double

addPoint

public void addPoint(double x,
                     double y)

Adds a point to the trail.

Overrides:

addPoint in class TrailBezier

Parameters:

x - double

y - double

drawPathEnd

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

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

Overrides:

drawPathEnd in class TrailBezier

Parameters:

panel - DrawingPanel

g2 - Graphics2D

getXMin

public double getXMin()

Gets the minimum x value in the trail.

Specified by:

getXMin in interface Measurable

Overrides:

getXMin in class TrailBezier

Returns:

double

getXMax

public double getXMax()

Gets the maximum x value in the trail.

Specified by:

getXMax in interface Measurable

Overrides:

getXMax in class TrailBezier

Returns:

double

getYMin

public double getYMin()

Gets the minimum y value in the trail.

Specified by:

getYMin in interface Measurable

Overrides:

getYMin in class TrailBezier

Returns:

double

getYMax

public double getYMax()

Gets the maximum y value in the trail.

Specified by:

getYMax in interface Measurable

Overrides:

getYMax in class TrailBezier

Returns:

double