public System.IO.Stream GetImageStream(int tx, int ty, int zoom)
{
int imageWidth = 256;
int imageHeight = 256;
double axMin = -1.95;
double axMax = axMin + 2.5;
double ayMin = -1.25;
double ayMax = ayMin + 2.5;
double part = 1.0 / (1 << zoom);
double xMin = axMin + tx * part * (axMax - axMin);
double xMax = axMin + (tx+1) * part * (axMax - axMin);
double yMin = ayMin + ty * part * (ayMax - ayMin);
double yMax = ayMin + (ty + 1) * part * (ayMax - ayMin);
int iterations = 1000;
HDRImage image = new HDRImage(imageWidth, imageHeight);
double xInc = (xMax - xMin) / imageWidth;
double yInc = (yMax - yMin) / imageHeight;
int colsDone = 0;
double x = xMin; // Real part
for (int screenX = 0; screenX < imageWidth; screenX++)
{
double y = yMin; // Imaginary part
for (int screenY = 0; screenY < imageHeight; screenY++)
{
double x1 = 0, y1 = 0;
int iter = 0;
while (iter < iterations && x1 * x1 + y1 * y1 < 4)
//OH-was: while (iter < iterations && Math.Sqrt((x1 * x1) + (y1 * y1)) < 2)
{
iter++;
double xx = (x1 * x1) - (y1 * y1) + x;
y1 = 2 * x1 * y1 + y;
x1 = xx;
}
image.SetPixel(screenX, screenY, iter);
y += yInc;
}
colsDone++;
x += xInc;
}
Bitmap bmp = image.ToBitmap();
MemoryStream stream = new MemoryStream();
bmp.Save(stream, ImageFormat.Png);
stream.Seek(0, SeekOrigin.Begin);
return stream;
}