1 /*
   2  * Copyright (c) 2007, 2017 Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 package org.jemmy;
  25 
  26 /**
  27  * The class for easy computations.
  28  * @author shura
  29  */
  30 public class Vector {
  31 
  32     private double x;
  33     private double y;
  34 
  35     /**
  36      *
  37      * @param x
  38      * @param y
  39      */
  40     public Vector(double x, double y) {
  41         this.x = x;
  42         this.y = y;
  43     }
  44 
  45     /**
  46      *
  47      * @param from
  48      * @param to
  49      */
  50     public Vector(Point from, Point to) {
  51         x = to.x - from.x;
  52         y = to.y - from.y;
  53     }
  54 
  55     /**
  56      *
  57      * @return
  58      */
  59     public double getX() {
  60         return x;
  61     }
  62 
  63     /**
  64      *
  65      * @return
  66      */
  67     public double getY() {
  68         return y;
  69     }
  70 
  71     /**
  72      *
  73      * @return
  74      */
  75     public double lenght() {
  76         return Math.sqrt(x*x + y*y);
  77     }
  78 
  79     /**
  80      *
  81      * @param newLenght
  82      * @return self
  83      */
  84     public Vector setLenght(double newLenght) {
  85         double lenght = lenght();
  86         x = x * newLenght / lenght;
  87         y = y * newLenght / lenght;
  88         return this;
  89     }
  90 
  91     /**
  92      * @param multiplier
  93      * @return self
  94      */
  95     public Vector multiply(double multiplier) {
  96         x*=multiplier;
  97         y*=multiplier;
  98         return this;
  99     }
 100 
 101     /**
 102      *
 103      * @return a clone
 104      */
 105     @Override
 106     public Vector clone() {
 107         return new Vector(x, y);
 108     }
 109 
 110     /**
 111      *
 112      * @return
 113      */
 114     @Override
 115     public String toString() {
 116         return "(" + x + "," + y + ")";
 117     }
 118 
 119     /**
 120      * Adds another vector <code>(x1 + x2, y1 + y2)</code>
 121      * @param v
 122      * @return self
 123      */
 124     public Vector add(Vector v) {
 125         x+=v.x;
 126         y+=v.y;
 127         return this;
 128     }
 129 
 130 
 131 }