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gnu.java.awt.java2d

Class Segment

Implemented Interfaces:
Cloneable
Known Direct Subclasses:
CubicSegment, LineSegment, QuadSegment
public abstract class Segment
extends Object
implements Cloneable

Field Summary

Point2D
P1
Point2D
P2
Segment
first
Segment
last
Segment
next
protected double
radius

Constructor Summary

Segment()
Create a new, empty segment

Method Summary

void
add(Segment newsegment)
Add a segment to the polygon
abstract double[]
cp1()
Returns the coordinates of the first control point, or the start point for a line segment.
abstract double[]
cp2()
Returns the coordinates of the second control point, or the end point for a line segment.
abstract Segment[]
getDisplacedSegments(double radius)
Get the "top" and "bottom" segments of a segment.
protected double[]
normal(double x0, double y0, double x1, double y1)
Get the normal vector to the slope of the line.
abstract void
reverse()
Reverse the current segment
void
reverseAll()
Reverses the orientation of the whole polygon
String
toString()
Convert this Object to a human-readable String.

Methods inherited from class java.lang.Object

clone, equals, extends Object> getClass, finalize, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

P1

public Point2D P1

P2

public Point2D P2

first

public Segment first

last

public Segment last
Segment next

radius

protected double radius

Constructor Details

Segment

public Segment()
Create a new, empty segment

Method Details

add

public void add(Segment newsegment)
Add a segment to the polygon
Parameters:
newsegment - segment to add

cp1

public abstract double[] cp1()
Returns the coordinates of the first control point, or the start point for a line segment.

cp2

public abstract double[] cp2()
Returns the coordinates of the second control point, or the end point for a line segment.

getDisplacedSegments

public abstract Segment[] getDisplacedSegments(double radius)
Get the "top" and "bottom" segments of a segment. First array element is p0 + normal, second is p0 - normal.

normal

protected double[] normal(double x0,
                          double y0,
                          double x1,
                          double y1)
Get the normal vector to the slope of the line.
Returns:
vector of length radius, normal to the (x0,y0)-(x1,y1) vector)

reverse

public abstract void reverse()
Reverse the current segment

reverseAll

public void reverseAll()
Reverses the orientation of the whole polygon

toString

public String toString()
Convert this Object to a human-readable String. There are no limits placed on how long this String should be or what it should contain. We suggest you make it as intuitive as possible to be able to place it into System.out.println() and such.

It is typical, but not required, to ensure that this method never completes abruptly with a RuntimeException.

This method will be called when performing string concatenation with this object. If the result is null, string concatenation will instead use "null".

The default implementation returns getClass().getName() + "@" + Integer.toHexString(hashCode()).

Overrides:
toString in interface Object
Returns:
the String representing this Object, which may be null
See Also:
getClass(), Object.hashCode(), Class.getName(), Integer.toHexString(int)
Segment.java -- Abstract segment used for BasicStroke Copyright (C) 2006 Free Software Foundation, Inc. This file is part of GNU Classpath. GNU Classpath is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. GNU Classpath is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GNU Classpath; see the file COPYING. If not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. Linking this library statically or dynamically with other modules is making a combined work based on this library. Thus, the terms and conditions of the GNU General Public License cover the whole combination. As a special exception, the copyright holders of this library give you permission to link this library with independent modules to produce an executable, regardless of the license terms of these independent modules, and to copy and distribute the resulting executable under terms of your choice, provided that you also meet, for each linked independent module, the terms and conditions of the license of that module. An independent module is a module which is not derived from or based on this library. If you modify this library, you may extend this exception to your version of the library, but you are not obligated to do so. If you do not wish to do so, delete this exception statement from your version.

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