static public Bitmap rotate(Bitmap image, int angle)
{
LockBitmap lockImage = new LockBitmap(image);
Bitmap result = new Bitmap(width: image.Width, height: image.Height);
LockBitmap lockResult = new LockBitmap(result);
lockImage.LockBits();
lockResult.LockBits();
// center of image
int y0 = image.Height / 2;
int x0 = image.Width / 2;
double degree = Math.PI * angle / 180.0;
for (int y = 0; y < image.Height; y++)
{
for (int x = 0; x < image.Width; x++)
{
int newX = Convert.ToInt32(Math.Cos(degree) * (x - x0) - Math.Sin(degree) * (y - y0) + x0);
if (newX >= image.Width || newX < 0)
{
continue;
}
int newY = Convert.ToInt32(Math.Sin(degree) * (x - x0) + Math.Cos(degree) * (y - y0) + y0);
if (newY >= image.Height || newY < 0)
{
continue;
}
Color color = lockImage.GetPixel(x, y);
lockResult.SetPixel(newX, newY, color);
}
}
lockImage.UnlockBits();
lockResult.UnlockBits();
return(result);
}
static public Bitmap wind(Bitmap image, int strength, Direction direction)
{
int pixelStrenght = strengthToPixels(strength, image, direction.orientation());
Random randShift = new Random(pixelStrenght);
Bitmap result = new Bitmap(width: image.Width, height: image.Height);
LockBitmap lockResult = new LockBitmap(result);
LockBitmap lockBitmap = new LockBitmap(image);
lockBitmap.LockBits();
lockResult.LockBits();
switch (direction)
{
case Direction.Left:
for (int y = lockBitmap.Height - 1; y >= 0; y--)
{
for (int x = 0; x < lockBitmap.Width; x++)
{
Color cl = lockBitmap.GetPixel(x, y);
int shift = x - randShift.Next(0, strength);
for (int i = shift; (i <= x && i >= 0); i++)
{
lockResult.SetPixel(i, y, cl);
}
}
}
break;
case Direction.Right:
for (int y = lockBitmap.Height - 1; y >= 0; y--)
{
for (int x = lockBitmap.Width - 1; x >= 0; x--)
{
Color cl = lockBitmap.GetPixel(x, y);
int shift = x + randShift.Next(0, strength);
for (int i = x; (i <= shift && i < lockBitmap.Width); i++)
{
lockResult.SetPixel(i, y, cl);
}
}
}
break;
case Direction.Down:
for (int x = 0; x < lockBitmap.Width; x++)
{
for (int y = lockBitmap.Height - 1; y >= 0; y--)
{
Color cl = lockBitmap.GetPixel(x, y);
int shift = y + randShift.Next(0, strength);
for (int i = y; (i <= shift && i < lockBitmap.Height); i++)
{
lockResult.SetPixel(x, i, cl);
}
}
}
break;
case Direction.Up:
for (int x = 0; x < lockBitmap.Width; x++)
{
for (int y = 0; y < lockBitmap.Height; y++)
{
Color cl = lockBitmap.GetPixel(x, y);
int shift = y - randShift.Next(0, strength);
for (int i = shift; (i <= y && i >= 0); i++)
{
lockResult.SetPixel(x, i, cl);
}
}
}
break;
}
lockBitmap.UnlockBits();
lockResult.UnlockBits();
return(result);
}