1: /// <summary>

   2: /// Does a "wave" effect on the image

   3: /// </summary>

   4: /// <param name="OriginalImage">Image to manipulate</param>

   5: /// <param name="Amplitude">Amplitude of the sine wave</param>

   6: /// <param name="Frequency">Frequency of the sine wave</param>

   7: /// <param name="XDirection">Determines if this should be done in the X direction</param>

   8: /// <param name="YDirection">Determines if this should be done in the Y direction</param>

   9: /// <returns>A bitmap which has been modified</returns>

  10: public static Bitmap SinWave(Bitmap OriginalImage, float Amplitude, float Frequency, bool XDirection, bool YDirection)

  11: {

  12:     Bitmap NewBitmap = new Bitmap(OriginalImage.Width, OriginalImage.Height);

  13:     BitmapData NewData = Image.LockImage(NewBitmap);

  14:     BitmapData OldData = Image.LockImage(OriginalImage);

  15:     int NewPixelSize = Image.GetPixelSize(NewData);

  16:     int OldPixelSize = Image.GetPixelSize(OldData);

  17:     for (int x = 0; x < NewBitmap.Width; ++x)

  18:     {

  19:         for (int y = 0; y < NewBitmap.Height; ++y)

  20:         {

  21:             double Value1 = 0;

  22:             double Value2 = 0;

  23:             if (YDirection)

  24:                 Value1 = System.Math.Sin(((x * Frequency) * System.Math.PI) / 180.0d) * Amplitude;

  25:             if (XDirection)

  26:                 Value2 = System.Math.Sin(((y * Frequency) * System.Math.PI) / 180.0d) * Amplitude;

  27:             Value1 = y - (int)Value1;

  28:             Value2 = x - (int)Value2;

  29:             while (Value1 < 0)

  30:                 Value1 += NewBitmap.Height;

  31:             while (Value2 < 0)

  32:                 Value2 += NewBitmap.Width;

  33:             while (Value1 >= NewBitmap.Height)

  34:                 Value1 -= NewBitmap.Height;

  35:             while (Value2 >= NewBitmap.Width)

  36:                 Value2 -= NewBitmap.Width;

  37:             Image.SetPixel(NewData, x, y,

  38:                 Image.GetPixel(OldData, (int)Value2, (int)Value1, OldPixelSize),

  39:                 NewPixelSize);

  40:         }

  41:     }

  42:     Image.UnlockImage(NewBitmap, NewData);

  43:     Image.UnlockImage(OriginalImage, OldData);

  44:     return NewBitmap;

  45: }