Karinto/Point.cs

   1 /*\r
   2  *      Karinto Library Project\r
   3  *\r
   4  *      This software is distributed under a zlib-style license.\r
   5  *      See license.txt for more information.\r
   6  */\r
   7 \r
   8 using System;\r
   9 using System.Collections.Generic;\r
  10 using Karinto.Xml;\r
  11 using Karinto.Numeric;\r
  12 \r
  13 namespace Karinto\r
  14 {\r
  15     /// <summary>\r
  16     ///     2次元座標を示す\r
  17     /// </summary>\r
  18     public class Point\r
  19     {\r
  20         #region type definition\r
  21 \r
  22         private class XComparerClass : IComparer<Point>\r
  23         {\r
  24             public int Compare(Point a, Point b)\r
  25             {\r
  26                 return a.X.CompareTo(b.X);\r
  27             }\r
  28         }\r
  29 \r
  30         private class YComparerClass : IComparer<Point>\r
  31         {\r
  32             public int Compare(Point a, Point b)\r
  33             {\r
  34                 return a.Y.CompareTo(b.Y);\r
  35             }\r
  36         }\r
  37         #endregion\r
  38 \r
  39         #region private or protected fields\r
  40 \r
  41         private static IComparer<Point> xComparer = new XComparerClass();\r
  42         private static IComparer<Point> yComparer = new YComparerClass();\r
  43 \r
  44         #endregion\r
  45 \r
  46         #region constructors\r
  47 \r
  48         public Point()\r
  49         {\r
  50         }\r
  51 \r
  52         public Point(double x, double y)\r
  53         {\r
  54             X = x;\r
  55             Y = y;\r
  56         }\r
  57 \r
  58         public Point(Point point)\r
  59         {\r
  60             X = point.X;\r
  61             Y = point.Y;\r
  62         }\r
  63         #endregion\r
  64 \r
  65         #region operators\r
  66         /// <summary>\r
  67         ///     定数倍\r
  68         /// </summary>\r
  69         /// <param name="p">点</param>\r
  70         /// <param name="scale">スケール</param>\r
  71         /// <returns>定数倍後の新たなインスタンス</returns>\r
  72         public static Point operator *(Point point, double scale)\r
  73         {\r
  74             return new Point(point.X * scale, point.Y * scale);\r
  75         }\r
  76 \r
  77         /// <summary>\r
  78         ///     定数倍\r
  79         /// </summary>\r
  80         /// <param name="scale">スケール</param>\r
  81         /// <param name="point">定数倍される点</param>\r
  82         /// <returns>定数倍後の新たなインスタンス</returns>\r
  83         public static Point operator *(double scale, Point point)\r
  84         {\r
  85             return new Point(point.X * scale, point.Y * scale);\r
  86         }\r
  87 \r
  88         public static implicit operator Point(Complex complex)\r
  89         {\r
  90             return new Point(complex.Real, complex.Imaginary);\r
  91         }\r
  92 \r
  93         public static implicit operator Complex(Point point)\r
  94         {\r
  95             return new Complex(point.X, point.Y);\r
  96         }\r
  97 \r
  98         #endregion\r
  99 \r
 100         #region properties\r
 101 \r
 102         public double X\r
 103         {\r
 104             get;\r
 105             set;\r
 106         }\r
 107 \r
 108         public double Y\r
 109         {\r
 110             get;\r
 111             set;\r
 112         }\r
 113 \r
 114         /// <summary>\r
 115         ///     原点からの距離\r
 116         /// </summary>\r
 117         public double Distance\r
 118         {\r
 119             get\r
 120             {\r
 121                 return Math.Sqrt(X * X + Y * Y);\r
 122             }\r
 123         }\r
 124 \r
 125         /// <summary>\r
 126         ///     原点からの距離\r
 127         /// </summary>\r
 128         public double Norm\r
 129         {\r
 130             get\r
 131             {\r
 132                 return Math.Sqrt(X * X + Y * Y);\r
 133             }\r
 134         }\r
 135 \r
 136         /// <summary>\r
 137         ///     偏角\r
 138         /// </summary>\r
 139         public double Argument\r
 140         {\r
 141             get\r
 142             {\r
 143                 return Math.Atan2(Y, X);\r
 144             }\r
 145         }\r
 146 \r
 147         public static IComparer<Point> XComparer\r
 148         {\r
 149             get\r
 150             {\r
 151                 return xComparer;\r
 152             }\r
 153         }\r
 154 \r
 155         public static IComparer<Point> YComparer\r
 156         {\r
 157             get\r
 158             {\r
 159                 return yComparer;\r
 160             }\r
 161         }\r
 162 \r
 163         #endregion\r
 164 \r
 165         #region public methods\r
 166         /// <summary>\r
 167         ///     XとYを入れ換える\r
 168         /// </summary>\r
 169         public void SwapXY()\r
 170         {\r
 171             double x = X;\r
 172             X = Y;\r
 173             Y = x;\r
 174         }\r
 175 \r
 176         /// <summary>\r
 177         ///     加算(ベクトル合成) \r
 178         /// </summary>\r
 179         /// <param name="left">点1</param>\r
 180         /// <param name="right">点2</param>\r
 181         /// <returns>加算後の新たなインスタンス</returns>\r
 182         public static Point operator +(Point left, Point right)\r
 183         {\r
 184             return new Point(left.X + right.X, left.Y + right.Y);\r
 185         }\r
 186 \r
 187         /// <summary>\r
 188         ///     X, Y独立に定数倍する\r
 189         /// </summary>\r
 190         /// <param name="scale">X, Yそれぞれに掛ける係数からなる点</param>\r
 191         public Point Stretch(Point scale)\r
 192         {\r
 193             return new Point(X * scale.X, Y * scale.Y);\r
 194         }\r
 195 \r
 196         /// <summary>\r
 197         ///     点列の各要素を定数倍する\r
 198         /// </summary>\r
 199         /// <param name="xScale">Xに掛ける係数</param>\r
 200         /// <param name="yScale">Yに掛ける係数</param>\r
 201         public Point Stretch(double xScale, double yScale)\r
 202         {\r
 203             return new Point(X * xScale, Y * yScale);\r
 204         }\r
 205 \r
 206         public override string ToString()\r
 207         {\r
 208             return "Point ( " +\r
 209                             X.ToString("R") + ", " + Y.ToString("R") + " )";\r
 210         }\r
 211 \r
 212         #endregion\r
 213     }\r
 214 \r
 215 }\r