demo application added

svn path=/trunk/mcs/; revision=15463

diff --git a/mcs/class/System.Drawing/Test/System.Drawing/hering.cs b/mcs/class/System.Drawing/Test/System.Drawing/hering.cs
new file mode 100644 (file)
index 0000000..5dc32ef
--- /dev/null
+++ b/mcs/class/System.Drawing/Test/System.Drawing/hering.cs
@@ -0,0 +1,51 @@
+//
+// hering.cs 
+// Creates image for Hering illusion.
+// Converted to C# from Xr demo application.
+//
+// Author:
+//   Alexandre Pigolkine(pigolkine@gmx.de)
+// 
+//
+// (C) Ximian, Inc.  http://www.ximian.com
+//
+
+using System;
+using System.Drawing;
+using System.Drawing.Imaging;
+using System.Drawing.Drawing2D;
+ 
+namespace xrtest {
+ public class xrt {
+  public static void Main( String[] arr) {
+   float width = 400.0F;
+   float height = 800.0F;
+   
+   Bitmap bmp = new Bitmap((int)width, (int)height);
+   Graphics gr = Graphics.FromImage(bmp);
+   SolidBrush br = new SolidBrush(Color.White);
+   gr.FillRectangle(br, 0.0F, 0.0F, width, height);
+   int LINES = 32;
+   float MAX_THETA  = (.80F * 90.0F);
+   float THETA  = (2 * MAX_THETA / (LINES-1));
+   
+   Pen blackPen = new Pen(Color.Black, 2.0F);
+   GraphicsState state  = gr.Save();
+ 
+   gr.TranslateTransform(width/2.0F, height/2.0F);
+   gr.RotateTransform(MAX_THETA);
+   for( int i = 0; i < LINES; i++) {
+    gr.DrawLine( blackPen, -2.0F * width, 0.0F, 2.0F * width, 0.0F);
+    gr.RotateTransform(-THETA);
+   }
+   gr.Restore(state);
+   
+   Pen redPen = new Pen(Color.Red, 6F);
+   gr.DrawLine( redPen, width / 4F, 0F, width / 4F, height);
+   gr.DrawLine( redPen, 3F * width / 4F, 0F, 3F * width / 4F, height);
+   
+   bmp.Save("Hering.bmp", ImageFormat.Bmp);
+   Console.WriteLine("output file Hering.bmp");
+  }
+ }
+}