jhpro.fit

Class FitCircle2D

java.lang.Object

jhpro.fit.FitCircle2D

public class FitCircle2D
extends java.lang.Object

Class Circle handles a circle (or a portion of circle) which approximates a collection of data points. Besides usual characteristics of a circle (center, radius), and of a circle arc (start and stop angles) it also defines the approximating bezier curve.

Constructor Summary

Constructors

Constructor and Description
FitCircle2D(double[] x, double[] y) Creates a new instance of Circle, defined by a set of points.
FitCircle2D(P1D p) Creates a new instance of Ellipse, defined by P1D
FitCircle2D(java.awt.geom.Point2D left, java.awt.geom.Point2D middle, java.awt.geom.Point2D right, double[] x, double[] y) Creates a new instance of Circle, fitted to 3 defining points.

Method Summary

Modifier and Type	Method and Description
void	doc() Show online documentation.
java.awt.geom.Point2D.Double	getCenter() Report the circle center.
Circle	getCircle() Return fitted circle.
java.awt.geom.CubicCurve2D.Double	getCurve() Report the Bezier curve which best approximates the circle arc.
double	getDistance() Report the mean distance between the data points and the circle.
java.lang.Double	getRadius() Report the circle radius.
java.lang.Double	getStartAngle() Report the angle at start of the circle arc.
java.lang.Double	getStopAngle() Report the angle at stop of the circle arc.
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

FitCircle2D

public FitCircle2D(double[] x,
                   double[] y)

Creates a new instance of Circle, defined by a set of points.

Parameters:

x - array of abscissae

y - array of ordinates

FitCircle2D

public FitCircle2D(P1D p)

Creates a new instance of Ellipse, defined by P1D

Parameters:

P1D - input

FitCircle2D

public FitCircle2D(java.awt.geom.Point2D left,
                   java.awt.geom.Point2D middle,
                   java.awt.geom.Point2D right,
                   double[] x,
                   double[] y)

Creates a new instance of Circle, fitted to 3 defining points. The provided collection of coordinates is used only to compute the resulting distance.

Parameters:

left - left defining point

middle - middle defining point

right - right defining point

x - array of abscissae (including the defining points)

y - array of ordinates (including the defining points)

Method Detail

getCenter

public java.awt.geom.Point2D.Double getCenter()

Report the circle center.

Returns:

the center of the circle

getCurve

public java.awt.geom.CubicCurve2D.Double getCurve()

Report the Bezier curve which best approximates the circle arc.

Returns:

the Bezier curve

getDistance

public double getDistance()

Report the mean distance between the data points and the circle.

Returns:

the mean distance

getRadius

public java.lang.Double getRadius()

Report the circle radius.

Returns:

the circle radius

getStartAngle

public java.lang.Double getStartAngle()

Report the angle at start of the circle arc.

Returns:

the starting angle, in radians

getStopAngle

public java.lang.Double getStopAngle()

Report the angle at stop of the circle arc.

Returns:

the stopping angle, in radians

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

getCircle

public Circle getCircle()

Return fitted circle.

Returns:

fitted circle.

doc

public void doc()

Show online documentation.