Merge pull request #2 from PhannGor/master

C# client was added

clients/csharp/VisualClient.cs

@@ -0,0 +1,142 @@
+using System.IO;
+using System.Net.Sockets;
+using System.Text;
+
+namespace Com.CodeGame.CodeRacing2015.DevKit.CSharpCgdk
+{
+    public sealed class VisualClient
+    {
+        private const int BUFFER_SIZE_BYTES = 1 << 20;
+
+        private readonly TcpClient _client;
+        private readonly BinaryWriter _writer;
+
+        public VisualClient(string host, int port)
+        {
+            _client = new TcpClient(host, port)
+            {
+                SendBufferSize = BUFFER_SIZE_BYTES,
+                ReceiveBufferSize = BUFFER_SIZE_BYTES,
+                NoDelay = true
+            };
+
+            _writer = new BinaryWriter(_client.GetStream());
+        }
+
+        //---------------------------------------------------------------------
+        // Public
+        //---------------------------------------------------------------------
+
+        /// <summary>
+        /// Start queueing commands to be displayed either before main drawing
+        /// </summary>
+        public void BeginPre()
+        {
+            SendCommand("begin pre");
+        }
+
+        /// <summary>
+        /// Start queueing commands to be displayed either after main drawing
+        /// </summary>
+        public void BeginPost()
+        {
+            SendCommand("begin post");
+        }
+
+        /// <summary>
+        /// Mark either "pre" queue of commands as ready to be displayed
+        /// </summary>
+        public void EndPre()
+        {
+            SendCommand("end pre");
+        }
+
+        /// <summary>
+        /// Mark either "post" queue of commands as ready to be displayed
+        /// </summary>
+        public void EndPost()
+        {
+            SendCommand("end post");
+        }
+
+        /// <summary>
+        /// Draw a circle at (x, y) with radius r and color color
+        /// </summary>
+        public void Circle(double x, double y, float radius, float r = 0f, float g = 0f, float b = 0f)
+        {
+            SendCommand($"circle {x} {y} {radius} {r} {g} {b}");
+        }
+
+        /// <summary>
+        /// Draw a filled circle at (x, y) with radius r and color color
+        /// </summary>
+        public void FillCircle(double x, double y, float radius, float r = 0f, float g = 0f, float b = 0f)
+        {
+            SendCommand($"fill_circle {x} {y} {radius} {r} {g} {b}");
+        }
+
+        /// <summary>
+        /// Draw a rect with corners at (x, y) to (x, y) with color color
+        /// </summary>
+        public void Rect(double x1, double y1, double x2, double y2, float r = 0f, float g = 0f, float b = 0f)
+        {
+            SendCommand($"rect {x1} {y1} {x2} {y2} {r} {g} {b}");
+        }
+
+        /// <summary>
+        /// Draw a filled rect with corners at (x1, y1) to (x2, y2) with color color
+        /// </summary>
+        public void FillRect(double x1, double y1, double x2, double y2, float r = 0f, float g = 0f, float b = 0f)
+        {
+            SendCommand($"fill_rect {x1} {y1} {x2} {y2} {r} {g} {b}");
+        }
+
+        /// <summary>
+        /// Draw a line from (x1, y1) to (x2, y2) with color color
+        /// </summary>
+        public void Line(double x1, double y1, double x2, double y2, float r = 0f, float g = 0f, float b = 0f)
+        {
+            SendCommand($"line {x1} {y1} {x2} {y2} {r} {g} {b}");
+        }
+
+        /// <summary>
+        /// Show msg at coordinates (x, y) with color color
+        /// </summary>
+        public void Text(double x, double y, string msg, float r = 0f, float g = 0f, float b = 0f)
+        {
+            SendCommand($"text {x} {y} {msg} {r} {g} {b}");
+        }
+
+        //---------------------------------------------------------------------
+        // Helpers
+        //---------------------------------------------------------------------
+
+        private void SendCommand(string command)
+        {
+            WriteString(command + "\n");
+            _writer.Flush();
+        }
+
+        private void WriteString(string value)
+        {
+            if (value == null)
+            {
+                WriteInt(-1);
+                return;
+            }
+
+            var bytes = Encoding.UTF8.GetBytes(value);
+            _writer.Write(bytes, 0, bytes.Length);
+        }
+
+        private void WriteInt(int value)
+        {
+            _writer.Write(value);
+        }
+
+        public void Close()
+        {
+            _client.Close();
+        }
+    }
+}