org.eclipse.nebula.visualization.widgets.figureparts

Class PolarPoint

java.lang.Object

org.eclipse.nebula.visualization.widgets.figureparts.PolarPoint

public class PolarPoint
extends java.lang.Object

A polar point in a standard polar coordinates system.

Field Summary

Fields

Modifier and Type	Field and Description
int	r The radial coordinate
double	theta The angular coordinate in radians

Constructor Summary

Constructors

Constructor and Description
PolarPoint(int r, double theta)

Method Summary

Modifier and Type	Method and Description
boolean	equals(java.lang.Object obj)
int	hashCode()
static PolarPoint	point2PolarPoint(org.eclipse.draw2d.geometry.Point pole, org.eclipse.draw2d.geometry.Point point) convert a point to polar point
void	rotateAxis(double axisDirection, boolean inRadians) rotate the x axis of the polar coordinate system to the axisDirection
org.eclipse.draw2d.geometry.Point	toAbsolutePoint(org.eclipse.draw2d.geometry.Rectangle rect) Transform the polar point to the Point in the absolute coordinate system.
org.eclipse.draw2d.geometry.Point	toPoint() Transform the polar point to the Point in rectangular coordinates.
org.eclipse.draw2d.geometry.Point	toRelativePoint(org.eclipse.draw2d.geometry.Rectangle rect) Transform the polar point to the Point in the relative coordinate system, whose origin is (rect.x, rect.y).
java.lang.String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

r

public int r

The radial coordinate

theta

public double theta

The angular coordinate in radians

Constructor Detail

PolarPoint

public PolarPoint(int r,
                  double theta)

Parameters:

r - The radial coordinate

theta - The angular coordinate in radians

Method Detail

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object

toPoint

public org.eclipse.draw2d.geometry.Point toPoint()

Transform the polar point to the Point in rectangular coordinates. The rectangular coordinates has the same origin as the polar coordinates.

Returns:

the point in rectangular coordinates

toAbsolutePoint

public org.eclipse.draw2d.geometry.Point toAbsolutePoint(org.eclipse.draw2d.geometry.Rectangle rect)

Transform the polar point to the Point in the absolute coordinate system. It is assumed that the origin of the polar coordinate system is the central point of the rectangle.

Parameters:

rect - the paint area of the figure

Returns:

the point in absolute coordinate system.

toRelativePoint

public org.eclipse.draw2d.geometry.Point toRelativePoint(org.eclipse.draw2d.geometry.Rectangle rect)

Transform the polar point to the Point in the relative coordinate system, whose origin is (rect.x, rect.y). It is assumed that the origin of the polar coordinate system is the central point of the rectangle.

Parameters:

rect - the paint area of the figure

Returns:

the point in relative coordinate system.

point2PolarPoint

public static PolarPoint point2PolarPoint(org.eclipse.draw2d.geometry.Point pole,
                                          org.eclipse.draw2d.geometry.Point point)

convert a point to polar point

Parameters:

pole - the pole of the polar coordinate system.

point - the point to be converted

Returns:

the corresponding polar point.

rotateAxis

public void rotateAxis(double axisDirection,
                       boolean inRadians)

rotate the x axis of the polar coordinate system to the axisDirection

Parameters:

axisDirection - the direction of the new axis

inRadians - true if the axisDirection is in radians, false if in degrees.

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object