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+/* 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