private void mandelbrot() // calculate all points // djm
{
int x, y;
float h, b, alt = 0.0f;
action = false;
this.Cursor = Cursors.WaitCursor;
//this.Cursor = this.c1;
// setCursor(c1); // djm
this.Text = "Mandelbrot-Set will be produced - please wait...";
// showStatus("mandelbrot-Set will be produced - please wait..."); // djm
for (x = 0; x < x1; x += 2)
{
for (y = 0; y < y1; y++)
{
h = this.pointcolour(xstart + xzoom * (double)x, ystart + yzoom * (double)y); // color value
if (h != alt)
{
b = 1.0f - h * h; // brightness
var customColour = new HSB(h * 255, 0.8f * 255, b * 255); // hsb colour
var convertedColour = HSB.FromHSB(customColour); // convert hsb to rgb
this.pen = new Pen(convertedColour);
alt = h;
}
this.g1.DrawLine(this.pen, x, y, x + 1, y);
}
}
this.Text = "Mandelbrot-Set ready - please select zoom area with pressed mouse.";
// showStatus("mandelbrot-Set ready - please select zoom area with pressed mouse."); // djm
this.Cursor = Cursors.Cross;
//this.Cursor = this.c2;
action = true;
}
public static Color FromHSB(HSB hsbColor)
{
float r = hsbColor.b;
float g = hsbColor.b;
float b = hsbColor.b;
if (hsbColor.s != 0)
{
float max = hsbColor.b;
float dif = hsbColor.b * hsbColor.s / 255f;
float min = hsbColor.b - dif;
float h = hsbColor.h * 360f / 255f;
if (h < 60f)
{
r = max;
g = h * dif / 60f + min;
b = min;
}
else if (h < 120f)
{
r = -(h - 120f) * dif / 60f + min;
g = max;
b = min;
}
else if (h < 180f)
{
r = min;
g = max;
b = (h - 120f) * dif / 60f + min;
}
else if (h < 240f)
{
r = min;
g = -(h - 240f) * dif / 60f + min;
b = max;
}
else if (h < 300f)
{
r = (h - 240f) * dif / 60f + min;
g = min;
b = max;
}
else if (h <= 360f)
{
r = max;
g = min;
b = -(h - 360f) * dif / 60 + min;
}
else
{
r = 0;
g = 0;
b = 0;
}
}
return(Color.FromArgb
(
hsbColor.a,
(int)Math.Round(Math.Min(Math.Max(r, 0), 255)),
(int)Math.Round(Math.Min(Math.Max(g, 0), 255)),
(int)Math.Round(Math.Min(Math.Max(b, 0), 255))
));
}
