Data commit

Task/Brownian-tree/C-sharp/brownian-tree.cs

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+using System;
+using System.Drawing;
+
+namespace BrownianTree
+{
+    class Program
+    {
+        static Bitmap BrownianTree(int size, int numparticles)
+        {
+            Bitmap bmp = new Bitmap(size, size);
+            Rectangle bounds = new Rectangle { X = 0, Y = 0, Size = bmp.Size };
+            using (Graphics g = Graphics.FromImage(bmp))
+            {
+                g.Clear(Color.Black);
+            }
+            Random rnd = new Random();
+            bmp.SetPixel(rnd.Next(size), rnd.Next(size), Color.White);
+            Point pt = new Point(), newpt = new Point();
+            for (int i = 0; i < numparticles; i++)
+            {
+                pt.X = rnd.Next(size);
+                pt.Y = rnd.Next(size);
+                do
+                {
+                    newpt.X = pt.X + rnd.Next(-1, 2);
+                    newpt.Y = pt.Y + rnd.Next(-1, 2);
+                    if (!bounds.Contains(newpt))
+                    {
+                        pt.X = rnd.Next(size);
+                        pt.Y = rnd.Next(size);
+                    }
+                    else if (bmp.GetPixel(newpt.X, newpt.Y).R > 0)
+                    {
+                        bmp.SetPixel(pt.X, pt.Y, Color.White);
+                        break;
+                    }
+                    else
+                    {
+                        pt = newpt;
+                    }
+                } while (true);
+            }
+            return bmp;
+        }
+
+        static void Main(string[] args)
+        {
+            BrownianTree(300, 3000).Save("browniantree.png");
+        }
+    }
+}