Fixed unity terrain generation bug.

Tools/MapViewer/MapViewer/Model/Bitmap24.cs

@@ -0,0 +1,72 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Media;
+
+namespace TransportGame.MapViewer.Model
+{
+    public class Bitmap24
+    {
+        /// <summary>
+        /// Gets the width of the bitmap
+        /// </summary>
+        public int Width { get; private set; }
+
+        /// <summary>
+        /// Gets the height of the bitmap
+        /// </summary>
+        public int Height { get; private set; }
+
+        /// <summary>
+        /// Gets the raw bytes of the bitmap
+        /// </summary>
+        public byte[] Raw { get; private set; }
+
+        /// <summary>
+        /// Initializes a bitmap
+        /// </summary>
+        /// <param name="w"></param>
+        /// <param name="h"></param>
+        public Bitmap24(int w, int h)
+        {
+            Width = w;
+            Height = h;
+
+            Raw = new byte[w * h * 3];
+        }
+
+        /// <summary>
+        /// Gets or sets a pixel
+        /// </summary>
+        /// <param name="x">x coordinate of pixel</param>
+        /// <param name="y">y coordinate of pixel</param>
+        public Color this[int x, int y]
+        {
+            get
+            {
+                int index = RawIndexOf(x, y);
+                return Color.FromRgb(Raw[index], Raw[index + 1], Raw[index + 2]);
+            }
+            set
+            {
+                int index = RawIndexOf(x, y);
+                Raw[index] = value.R;
+                Raw[index + 1] = value.G;
+                Raw[index + 2] = value.B;
+            }
+        }
+
+        private int RawIndexOf(int x, int y)
+        {
+            if (x < 0 || x >= Width)
+                throw new ArgumentOutOfRangeException("x is out of range");
+
+            if (y < 0 || y >= Height)
+                throw new ArgumentOutOfRangeException("x is out of range");
+
+            return 3 * (x + y * Width);
+        }
+    }
+}