libjava/java/awt/geom/Point2D.java

   1 /* Copyright (C) 1999, 2000, 2002  Free Software Foundation
   2
   3 This file is part of GNU Classpath.
   4
   5 GNU Classpath is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU General Public License as published by
   7 the Free Software Foundation; either version 2, or (at your option)
   8 any later version.
   9
  10 GNU Classpath is distributed in the hope that it will be useful, but
  11 WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13 General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with GNU Classpath; see the file COPYING.  If not, write to the
  17 Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18 02111-1307 USA.
  19
  20 Linking this library statically or dynamically with other modules is
  21 making a combined work based on this library.  Thus, the terms and
  22 conditions of the GNU General Public License cover the whole
  23 combination.
  24
  25 As a special exception, the copyright holders of this library give you
  26 permission to link this library with independent modules to produce an
  27 executable, regardless of the license terms of these independent
  28 modules, and to copy and distribute the resulting executable under
  29 terms of your choice, provided that you also meet, for each linked
  30 independent module, the terms and conditions of the license of that
  31 module.  An independent module is a module which is not derived from
  32 or based on this library.  If you modify this library, you may extend
  33 this exception to your version of the library, but you are not
  34 obligated to do so.  If you do not wish to do so, delete this
  35 exception statement from your version. */
  36
  37 package java.awt.geom;
  38
  39 /**
  40  * @author Per Bothner <bothner@cygnus.com>
  41  * @date February 8, 1999.
  42  */
  43
  44 /* Written using "Java Class Libraries", 2nd edition, plus online
  45  * API docs for JDK 1.2 beta from http://www.javasoft.com.
  46  * Status:  Believed complete and correct, except that neither toString
  47  * nor hashCode have been compared with JDK output.
  48  */
  49
  50 public abstract class Point2D implements Cloneable
  51 {
  52   public abstract double getX();
  53   public abstract double getY();
  54
  55   public abstract void setLocation (double x, double y);
  56
  57   protected Point2D ()
  58   {
  59   }
  60
  61   public void setLocation (Point2D pt)  { setLocation(pt.getX(), pt.getY()); }
  62
  63   static public double distanceSq (double X1, double Y1, double X2, double Y2)
  64   {
  65     X2 -= X1;
  66     Y2 -= Y1;
  67     return X2*X2 + Y2*Y2;
  68   }
  69
  70   static public double distance (double X1, double Y1, double X2, double Y2)
  71   {
  72     return Math.sqrt(distanceSq(X1, Y1, X2, Y2));
  73   }
  74
  75   public double distanceSq (double PX, double PY)
  76   {
  77     return distanceSq (getX(), PX, getY(), PY);
  78   }
  79
  80   public double distance (double PX, double PY)
  81   {
  82     return distance (getX(), PX, getY(), PY);
  83   }
  84
  85   public double distanceSq (Point2D pt)
  86   {
  87     return distanceSq (getX(), pt.getX(), getY(), pt.getY());
  88   }
  89
  90   public double distance (Point2D pt)
  91   {
  92     return distance (getX(), pt.getX(), getY(), pt.getY());
  93   }
  94
  95   public int hashCode() { return (int) getX() ^ (int) getY(); }
  96
  97   public Object clone()
  98   {
  99     try
 100     {
 101       return super.clone ();
 102     }
 103     catch (CloneNotSupportedException _) {return null;}
 104   }
 105
 106   public boolean equals (Object o)
 107   {
 108     if (! (o instanceof Point2D))
 109       return false;
 110     Point2D p = (Point2D) o;
 111     return getX () == p.getX () && getY () == p.getY ();
 112   }
 113
 114   public static class Double extends Point2D
 115   {
 116     public double x;
 117     public double y;
 118
 119     public Double ()
 120     {
 121       x = 0;
 122       y = 0;
 123     }
 124
 125     public Double (double x, double y)
 126     {
 127       this.x = x;
 128       this.y = y;
 129     }
 130
 131     public double getX ()
 132     {
 133       return x;
 134     }
 135
 136     public double getY ()
 137     {
 138       return y;
 139     }
 140
 141     public void setLocation (double x, double y)
 142     {
 143       this.x = x;
 144       this.y = y;
 145     }
 146
 147     public String toString ()
 148     {
 149       return "(" + x + ", " + y + ")";
 150     }
 151   }
 152
 153   public static class Float extends Point2D
 154   {
 155     public float x;
 156     public float y;
 157
 158     public Float ()
 159     {
 160       x = 0;
 161       y = 0;
 162     }
 163
 164     public Float (float x, float y)
 165     {
 166       this.x = x;
 167       this.y = y;
 168     }
 169
 170     public double getX ()
 171     {
 172       return x;
 173     }
 174
 175     public double getY ()
 176     {
 177       return y;
 178     }
 179
 180     public void setLocation (double x, double y)
 181     {
 182       this.x = (float) x;
 183       this.y = (float) y;
 184     }
 185
 186     public void setLocation (float x, float y)
 187     {
 188       this.x = x;
 189       this.y = y;
 190     }
 191
 192     public String toString ()
 193     {
 194       return "(" + x + ", " + y + ")";
 195     }
 196   }
 197 }