nl.skybound.awt
Class DoublePolygon

java.lang.Object
  |
  +--nl.skybound.awt.DoublePolygon

All Implemented Interfaces:

java.io.Serializable

public class DoublePolygon

extends java.lang.Object

implements java.io.Serializable

Similar to but not a descendent of java.awt.Polygon that uses double values instead of int values.

See Also:

Polygon, Serialized Form

Field Summary

int	npoints The total number of points.
double[]	xpoints The array of x coordinates.
double[]	ypoints The array of y coordinates.

Constructor Summary

DoublePolygon()
Creates an empty polygon.

DoublePolygon(double[] xpoints, double[] ypoints, int npoints)
Constructs and initializes a DoublePolygon from the specified parameters.

Method Summary

void	addPoint(double x, double y) Appends the specified coordinates to this DoublePolygon.
boolean	contains(double x, double y) Determines whether the specified coordinates are inside this Polygon.
double	getMaxX() Returns the maximum x coordinate.
double	getMaxY() Returns the maximum y coordinate.
double	getMinX() Returns the minimum x coordinate.
double	getMinY() Returns the minimum y coordinate.
void	translate(double deltaX, double deltaY) Translates the vertices of the DoublePolygon by deltaX along the x axis and by deltaY along the y axis.

Methods inherited from class java.lang.Object

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

Field Detail

npoints

public int npoints

The total number of points. This value can be NULL.

See Also:

addPoint(double, double)

xpoints

public double[] xpoints

The array of x coordinates.

See Also:

addPoint(double, double)

ypoints

public double[] ypoints

The array of y coordinates.

See Also:

addPoint(double, double)

Constructor Detail

DoublePolygon

public DoublePolygon()

Creates an empty polygon.

DoublePolygon

public DoublePolygon(double[] xpoints,
                     double[] ypoints,
                     int npoints)

Constructs and initializes a DoublePolygon from the specified parameters.

Parameters:

xpoints - an array of x coordinates

ypoints - an array of y coordinates

npoints - the total number of points in the Polygon

Throws:

NegativeArraySizeException - if the value of npoints is negative.

IndexOutOfBoundsException - if npoints is greater than the length of xpoints or the length of ypoints.

NullPointerException - if xpoints or ypoints is null.

Method Detail

translate

public void translate(double deltaX,
                      double deltaY)

Translates the vertices of the DoublePolygon by deltaX along the x axis and by deltaY along the y axis.

Parameters:

deltaX - the amount to translate along the x axis

deltaY - the amount to translate along the y axis

addPoint

public void addPoint(double x,
                     double y)

Appends the specified coordinates to this DoublePolygon.

Parameters:

x, y - the specified coordinates

See Also:

contains(double, double)

contains

public boolean contains(double x,
                        double y)

Determines whether the specified coordinates are inside this Polygon. For the definition of insideness, see the class comments of Shape.

Parameters:

x, y - the specified coordinates

Returns:

true if this Polygon contains the specified coordinates; false otherwise.

getMinX

public double getMinX()

Returns the minimum x coordinate.

getMinY

public double getMinY()

Returns the minimum y coordinate.

getMaxX

public double getMaxX()

Returns the maximum x coordinate.

getMaxY

public double getMaxY()

Returns the maximum y coordinate.