org.apache.batik.ext.awt.geom

Class Polygon2D

java.lang.Object

org.apache.batik.ext.awt.geom.Polygon2D

All Implemented Interfaces:

java.awt.Shape, java.io.Serializable, java.lang.Cloneable

public class Polygon2D
extends java.lang.Object
implements java.awt.Shape, java.lang.Cloneable, java.io.Serializable

This class is a Polygon with float coordinates.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected java.awt.geom.Rectangle2D	bounds Bounds of the Polygon2D.
int	npoints The total number of points.
float[]	xpoints The array of x coordinates.
float[]	ypoints The array of x coordinates.

Constructor Summary

Constructors

Constructor and Description
Polygon2D() Creates an empty Polygon2D.
Polygon2D(float[] xpoints, float[] ypoints, int npoints) Constructs and initializes a Polygon2D from the specified parameters.
Polygon2D(int[] xpoints, int[] ypoints, int npoints) Constructs and initializes a Polygon2D from the specified parameters.
Polygon2D(java.awt.Polygon pol) Constructs and initializes a Polygon2D from the specified Polygon.
Polygon2D(java.awt.geom.Rectangle2D rec) Constructs and initializes a Polygon2D from the specified Rectangle2D.

Method Summary

Modifier and Type	Method and Description
void	addPoint(float x, float y) Appends the specified coordinates to this Polygon2D.
void	addPoint(java.awt.geom.Point2D p)
java.lang.Object	clone()
boolean	contains(double x, double y) Determines if the specified coordinates are inside this Polygon.
boolean	contains(double x, double y, double w, double h) Tests if the interior of this Polygon entirely contains the specified set of rectangular coordinates.
boolean	contains(int x, int y) Determines whether the specified coordinates are inside this Polygon.
boolean	contains(java.awt.Point p) Determines whether the specified Point is inside this Polygon.
boolean	contains(java.awt.geom.Point2D p) Tests if a specified Point2D is inside the boundary of this Polygon.
boolean	contains(java.awt.geom.Rectangle2D r) Tests if the interior of this Polygon entirely contains the specified Rectangle2D.
java.awt.Rectangle	getBounds()
java.awt.geom.Rectangle2D	getBounds2D() Returns the high precision bounding box of the Shape.
java.awt.geom.PathIterator	getPathIterator(java.awt.geom.AffineTransform at) Returns an iterator object that iterates along the boundary of this Polygon and provides access to the geometry of the outline of this Polygon.
java.awt.geom.PathIterator	getPathIterator(java.awt.geom.AffineTransform at, double flatness) Returns an iterator object that iterates along the boundary of the Polygon2D and provides access to the geometry of the outline of the Shape.
java.awt.Polygon	getPolygon()
Polyline2D	getPolyline2D()
boolean	intersects(double x, double y, double w, double h) Tests if the interior of this Polygon intersects the interior of a specified set of rectangular coordinates.
boolean	intersects(java.awt.geom.Rectangle2D r) Tests if the interior of this Polygon intersects the interior of a specified Rectangle2D.
void	reset() Resets this Polygon object to an empty polygon.

Methods inherited from class java.lang.Object

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

Field Detail

npoints

public int npoints

The total number of points. The value of npoints represents the number of valid points in this Polygon.

xpoints

public float[] xpoints

The array of x coordinates. The value of npoints is equal to the number of points in this Polygon2D.

ypoints

public float[] ypoints

The array of x coordinates. The value of npoints is equal to the number of points in this Polygon2D.

bounds

protected java.awt.geom.Rectangle2D bounds

Bounds of the Polygon2D.

See Also:

getBounds()

Constructor Detail

Polygon2D

public Polygon2D()

Creates an empty Polygon2D.

Polygon2D

public Polygon2D(java.awt.geom.Rectangle2D rec)

Constructs and initializes a Polygon2D from the specified Rectangle2D.

Parameters:

rec - the Rectangle2D

Throws:

java.lang.NullPointerException - rec is null.

Polygon2D

public Polygon2D(java.awt.Polygon pol)

Constructs and initializes a Polygon2D from the specified Polygon.

Parameters:

pol - the Polygon

Throws:

java.lang.NullPointerException - pol is null.

Polygon2D

public Polygon2D(float[] xpoints,
                 float[] ypoints,
                 int npoints)

Constructs and initializes a Polygon2D 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 Polygon2D

Throws:

java.lang.NegativeArraySizeException - if the value of npoints is negative.

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

java.lang.NullPointerException - if xpoints or ypoints is null.

Polygon2D

public Polygon2D(int[] xpoints,
                 int[] ypoints,
                 int npoints)

Constructs and initializes a Polygon2D 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 Polygon2D

Throws:

java.lang.NegativeArraySizeException - if the value of npoints is negative.

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

java.lang.NullPointerException - if xpoints or ypoints is null.

Method Detail

reset

public void reset()

Resets this Polygon object to an empty polygon.

clone

public java.lang.Object clone()

Overrides:

clone in class java.lang.Object

getPolyline2D

public Polyline2D getPolyline2D()

getPolygon

public java.awt.Polygon getPolygon()

addPoint

public void addPoint(java.awt.geom.Point2D p)

addPoint

public void addPoint(float x,
                     float y)

Appends the specified coordinates to this Polygon2D.

Parameters:

x - the specified x coordinate

y - the specified y coordinate

contains

public boolean contains(java.awt.Point p)

Determines whether the specified Point is inside this Polygon.

Parameters:

p - the specified Point to be tested

Returns:

true if the Polygon contains the Point; false otherwise.

See Also:

contains(double, double)

contains

public boolean contains(int x,
                        int y)

Determines whether the specified coordinates are inside this Polygon.

Parameters:

x - the specified x coordinate to be tested

y - the specified y coordinate to be tested

Returns:

true if this Polygon contains the specified coordinates, (x, y); false otherwise.

getBounds2D

public java.awt.geom.Rectangle2D getBounds2D()

Returns the high precision bounding box of the Shape.

Specified by:

getBounds2D in interface java.awt.Shape

Returns:

a Rectangle2D that precisely bounds the Shape.

getBounds

public java.awt.Rectangle getBounds()

Specified by:

getBounds in interface java.awt.Shape

contains

public boolean contains(double x,
                        double y)

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

Specified by:

contains in interface java.awt.Shape

Parameters:

x - the specified x coordinate

y - the specified y coordinate

Returns:

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

contains

public boolean contains(java.awt.geom.Point2D p)

Tests if a specified Point2D is inside the boundary of this Polygon.

Specified by:

contains in interface java.awt.Shape

Parameters:

p - a specified Point2D

Returns:

true if this Polygon contains the specified Point2D; false otherwise.

See Also:

contains(double, double)

intersects

public boolean intersects(double x,
                          double y,
                          double w,
                          double h)

Tests if the interior of this Polygon intersects the interior of a specified set of rectangular coordinates.

Specified by:

intersects in interface java.awt.Shape

Parameters:

x - the x coordinate of the specified rectangular shape's top-left corner

y - the y coordinate of the specified rectangular shape's top-left corner

w - the width of the specified rectangular shape

h - the height of the specified rectangular shape

Returns:

true if the interior of this Polygon and the interior of the specified set of rectangular coordinates intersect each other; false otherwise.

intersects

public boolean intersects(java.awt.geom.Rectangle2D r)

Tests if the interior of this Polygon intersects the interior of a specified Rectangle2D.

Specified by:

intersects in interface java.awt.Shape

Parameters:

r - a specified Rectangle2D

Returns:

true if this Polygon and the interior of the specified Rectangle2D intersect each other; false otherwise.

contains

public boolean contains(double x,
                        double y,
                        double w,
                        double h)

Tests if the interior of this Polygon entirely contains the specified set of rectangular coordinates.

Specified by:

contains in interface java.awt.Shape

Parameters:

x - the x coordinate of the top-left corner of the specified set of rectangular coordinates

y - the y coordinate of the top-left corner of the specified set of rectangular coordinates

w - the width of the set of rectangular coordinates

h - the height of the set of rectangular coordinates

Returns:

true if this Polygon entirely contains the specified set of rectangular coordinates; false otherwise.

contains

public boolean contains(java.awt.geom.Rectangle2D r)

Tests if the interior of this Polygon entirely contains the specified Rectangle2D.

Specified by:

contains in interface java.awt.Shape

Parameters:

r - the specified Rectangle2D

Returns:

true if this Polygon entirely contains the specified Rectangle2D; false otherwise.

See Also:

contains(double, double, double, double)

getPathIterator

public java.awt.geom.PathIterator getPathIterator(java.awt.geom.AffineTransform at)

Returns an iterator object that iterates along the boundary of this Polygon and provides access to the geometry of the outline of this Polygon. An optional AffineTransform can be specified so that the coordinates returned in the iteration are transformed accordingly.

Specified by:

getPathIterator in interface java.awt.Shape

Parameters:

at - an optional AffineTransform to be applied to the coordinates as they are returned in the iteration, or null if untransformed coordinates are desired

Returns:

a PathIterator object that provides access to the geometry of this Polygon.

getPathIterator

public java.awt.geom.PathIterator getPathIterator(java.awt.geom.AffineTransform at,
                                                  double flatness)

Returns an iterator object that iterates along the boundary of the Polygon2D and provides access to the geometry of the outline of the Shape. Only SEG_MOVETO, SEG_LINETO, and SEG_CLOSE point types are returned by the iterator. Since polygons are already flat, the flatness parameter is ignored.

Specified by:

getPathIterator in interface java.awt.Shape

Parameters:

at - an optional AffineTransform to be applied to the coordinates as they are returned in the iteration, or null if untransformed coordinates are desired

flatness - the maximum amount that the control points for a given curve can vary from colinear before a subdivided curve is replaced by a straight line connecting the endpoints. Since polygons are already flat the flatness parameter is ignored.

Returns:

a PathIterator object that provides access to the Shape object's geometry.