Yubeshi/Height.cs

   1 /*\r
   2  *      Yubeshi GPS Parser\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 System.Text;\r
  11 \r
  12 namespace Yubeshi\r
  13 {\r
  14     /// <summary>\r
  15     ///     Height(or Altitude) in metre\r
  16     /// </summary>\r
  17     public struct Height\r
  18     {\r
  19         #region type definitions\r
  20         public enum Base : int\r
  21         {\r
  22             Unknown = 0,\r
  23             EarthCenter = 1,\r
  24             MeanSeaLevel = 2,\r
  25             Geoid = 3,\r
  26             Ellipsoid = 0x100,\r
  27             BesselEllipsoid = Ellipsoid | 41,\r
  28             Grs80Ellipsoid = Ellipsoid | 80,\r
  29             Wgs84Ellipsoid = Ellipsoid | 84,\r
  30         }\r
  31         #endregion\r
  32 \r
  33         #region fields\r
  34         private double height;\r
  35         private Base baseLevel;\r
  36         #endregion\r
  37 \r
  38         #region constructors\r
  39         public Height(double height)\r
  40             :this(height, Base.Unknown)\r
  41         {\r
  42         }\r
  43 \r
  44         public Height(double height, Base baseLevel)\r
  45         {\r
  46             \r
  47             this.height = height;\r
  48             this.baseLevel = baseLevel;\r
  49         }\r
  50         #endregion\r
  51 \r
  52         #region operators\r
  53         public static implicit operator Height(double height)\r
  54         {\r
  55             return new Height(height);\r
  56         }\r
  57 \r
  58         public static implicit operator double(Height height)\r
  59         {\r
  60             return height.height;\r
  61         }\r
  62         \r
  63         public static Height operator +(Height left, double right)\r
  64         {\r
  65             return new Height(left.height + right, left.baseLevel);\r
  66         }\r
  67 \r
  68         public static Height operator +(double left, Height right)\r
  69         {\r
  70             return new Height(right.height + left, right.baseLevel);\r
  71         }\r
  72 \r
  73         public static double operator -(Height left, Height right)\r
  74         {\r
  75             if (left.baseLevel != right.baseLevel)\r
  76             {\r
  77                 if (left.baseLevel != Base.Unknown &&\r
  78                                             right.baseLevel != Base.Unknown)\r
  79                 {\r
  80                     throw new InvalidOperationException(\r
  81                                                     "mismatched base level");\r
  82                 }\r
  83             }\r
  84             return left.height - right.height;\r
  85         }\r
  86         #endregion\r
  87 \r
  88         #region properties\r
  89 \r
  90         public Base BaseLevel\r
  91         {\r
  92             get\r
  93             {\r
  94                 return baseLevel;\r
  95             }\r
  96         }\r
  97 \r
  98         public bool IsAltitude\r
  99         {\r
 100             get\r
 101             {\r
 102                 return (baseLevel == Base.MeanSeaLevel) ||\r
 103                                                     (baseLevel == Base.Geoid);\r
 104             }\r
 105         }\r
 106         #endregion\r
 107 \r
 108         #region public methods\r
 109         #endregion\r
 110     }\r
 111 }\r