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1: /* LineSegment.java -- Line segment used for BasicStroke 2: Copyright (C) 2006 Free Software Foundation, Inc. 3: 4: This file is part of GNU Classpath. 5: 6: GNU Classpath is free software; you can redistribute it and/or modify 7: it under the terms of the GNU General Public License as published by 8: the Free Software Foundation; either version 2, or (at your option) 9: any later version. 10: 11: GNU Classpath is distributed in the hope that it will be useful, but 12: WITHOUT ANY WARRANTY; without even the implied warranty of 13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14: General Public License for more details. 15: 16: You should have received a copy of the GNU General Public License 17: along with GNU Classpath; see the file COPYING. If not, write to the 18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 19: 02110-1301 USA. 20: 21: Linking this library statically or dynamically with other modules is 22: making a combined work based on this library. Thus, the terms and 23: conditions of the GNU General Public License cover the whole 24: combination. 25: 26: As a special exception, the copyright holders of this library give you 27: permission to link this library with independent modules to produce an 28: executable, regardless of the license terms of these independent 29: modules, and to copy and distribute the resulting executable under 30: terms of your choice, provided that you also meet, for each linked 31: independent module, the terms and conditions of the license of that 32: module. An independent module is a module which is not derived from 33: or based on this library. If you modify this library, you may extend 34: this exception to your version of the library, but you are not 35: obligated to do so. If you do not wish to do so, delete this 36: exception statement from your version. */ 37: 38: 39: package gnu.java.awt.java2d; 40: 41: 42: import java.awt.geom.Point2D; 43: 44: public class LineSegment extends Segment 45: { 46: public LineSegment(double x1, double y1, double x2, double y2) 47: { 48: super(); 49: P1 = new Point2D.Double(x1, y1); 50: P2 = new Point2D.Double(x2, y2); 51: } 52: 53: public LineSegment(Point2D p1, Point2D p2) 54: { 55: super(); 56: P1 = (Point2D) p1.clone(); 57: P2 = (Point2D) p2.clone(); 58: } 59: 60: /** 61: * Clones this segment 62: */ 63: public Object clone() 64: { 65: LineSegment segment = null; 66: 67: try 68: { 69: segment = (LineSegment) super.clone(); 70: segment.P1 = (Point2D) P1.clone(); 71: segment.P2 = (Point2D) P2.clone(); 72: } 73: catch (CloneNotSupportedException cnse) 74: { 75: InternalError ie = new InternalError(); 76: ie.initCause(cnse); 77: throw ie; 78: } 79: 80: return segment; 81: } 82: 83: /** 84: * Get the "top" and "bottom" segments of this segment. 85: * First array element is p0 + normal, second is p0 - normal. 86: */ 87: public Segment[] getDisplacedSegments(double radius) 88: { 89: this.radius = radius; 90: double x0 = P1.getX(); 91: double y0 = P1.getY(); 92: double x1 = P2.getX(); 93: double y1 = P2.getY(); 94: double[] p = normal(x0, y0, x1, y1); 95: Segment s1 = (new LineSegment(x0 + p[0], y0 + p[1], 96: x1 + p[0], y1 + p[1] )); 97: Segment s2 = (new LineSegment(x0 - p[0], y0 - p[1], 98: x1 - p[0], y1 - p[1] )); 99: return new Segment[]{s1, s2}; 100: } 101: 102: public void reverse() 103: { 104: Point2D p = P1; 105: P1 = P2; 106: P2 = p; 107: } 108: 109: public double[] cp1() 110: { 111: return new double[]{P2.getX(), P2.getY()}; 112: } 113: 114: public double[] cp2() 115: { 116: return new double[]{P1.getX(), P1.getY()}; 117: } 118: } // class LineSegment