private bool Iterate(complex c, double p)
{
var z = new complex(.0d, .0d);
for (int i = 0; i < 50; i++)
{
var r = (polar)z;
r = r.Pow(p);
z = (complex)r + c;
if (z.Abs2() > 4.0d)
{
return(false);
}
}
return(z.Abs2() < 4.0d);
}
private void Launch(double p, int?n = null)
{
var w = Convert.ToDouble(panel1.Width);
var h = Convert.ToDouble(panel1.Height);
var rh = 3.0 / h;
Graphics g = null;
Bitmap bm = null;
var save = n.HasValue;
if (!save)
{
g = panel1.CreateGraphics();
}
else
{
bm = new Bitmap(1080, 1080, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
w = h = 1080d;
rh = 3.0 / 1080d;
g = Graphics.FromImage(bm);
}
g.Clear(Color.White);
var hdc = g.GetHdc();
for (int x = 0; x < w; x++)
{
for (int y = 0; y < h; y++)
{
var a = 1.0 - (w - (double)x) * rh;
var b = 1.5 - ((double)y) * rh;
var z = new complex(a, b);
var r = Iterate(z, p);
if (r)
{
GDI.SetPixel(hdc, x, y, 0x00000000);
}
}
}
g.ReleaseHdc(hdc);
g.DrawString(p.ToString("0.000"), SystemFonts.DefaultFont, Brushes.Black, 50, 50);
if (save)
{
bm.Save($@"d:\brol\mb\mb{n.Value.ToString("d4")}.png", ImageFormat.Png);
Invoke(new MethodInvoker(delegate
{
var g2 = panel1.CreateGraphics();
g2.DrawImage(bm, new Point(0, 0));
g2.Dispose();
bm.Dispose();
}));
}
g.Dispose();
}
