| /* LineSegment.java -- Line 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. */ |
| |
| |
| package gnu.java.awt.java2d; |
| |
| |
| import java.awt.geom.Point2D; |
| |
| public class LineSegment extends Segment |
| { |
| public LineSegment(double x1, double y1, double x2, double y2) |
| { |
| super(); |
| P1 = new Point2D.Double(x1, y1); |
| P2 = new Point2D.Double(x2, y2); |
| } |
| |
| public LineSegment(Point2D p1, Point2D p2) |
| { |
| super(); |
| P1 = (Point2D) p1.clone(); |
| P2 = (Point2D) p2.clone(); |
| } |
| |
| /** |
| * Clones this segment |
| */ |
| public Object clone() |
| { |
| LineSegment segment = null; |
| |
| try |
| { |
| segment = (LineSegment) super.clone(); |
| segment.P1 = (Point2D) P1.clone(); |
| segment.P2 = (Point2D) P2.clone(); |
| } |
| catch (CloneNotSupportedException cnse) |
| { |
| InternalError ie = new InternalError(); |
| ie.initCause(cnse); |
| throw ie; |
| } |
| |
| return segment; |
| } |
| |
| /** |
| * Get the "top" and "bottom" segments of this segment. |
| * First array element is p0 + normal, second is p0 - normal. |
| */ |
| public Segment[] getDisplacedSegments(double radius) |
| { |
| this.radius = radius; |
| double x0 = P1.getX(); |
| double y0 = P1.getY(); |
| double x1 = P2.getX(); |
| double y1 = P2.getY(); |
| double[] p = normal(x0, y0, x1, y1); |
| Segment s1 = (new LineSegment(x0 + p[0], y0 + p[1], |
| x1 + p[0], y1 + p[1] )); |
| Segment s2 = (new LineSegment(x0 - p[0], y0 - p[1], |
| x1 - p[0], y1 - p[1] )); |
| return new Segment[]{s1, s2}; |
| } |
| |
| public void reverse() |
| { |
| Point2D p = P1; |
| P1 = P2; |
| P2 = p; |
| } |
| |
| public double[] cp1() |
| { |
| return new double[]{P2.getX(), P2.getY()}; |
| } |
| |
| public double[] cp2() |
| { |
| return new double[]{P1.getX(), P1.getY()}; |
| } |
| } // class LineSegment |