// calculate all points // djm original mandelbrot()
private void Mandelbrot()
{
int x, y;
float h, b, alt = 0.0f;
action = false;
// Cursor = Cursors.WaitCursor; //jh not needed // setCursor(c1); // djm original java
Text = "C3375905";
message.Text = "Mandelbrot-Set will be produced - please wait..."; // showStatus("Mandelbrot-Set will be produced - please wait..."); // djm original java
for (x = 0; x < x1; x += 2) // x less than width - draw lines from left to right
for (y = 0; y < y1; y++) // draw 1 pixel at a time
{
h = Pointcolour(xstart + xzoom * (double)x, ystart + yzoom * (double)y); // color value
if (h != alt)
{
b = 1.0f - h * h; // brightness
var customColour = new HSBColor(h * ScaleUp, 0.8f * ScaleUp, b * ScaleUp); // hsb colour
var convertedColour = HSBColor.FromHSB(customColour); // convert hsb to rgb then make a Java Color
// Color col = Color.getHSBColor(h,0.8f,b); // djm not needed
// int red = col.getRed(); // djm not needed
// int green = col.getGreen(); // djm not needed
// int blue = col.getBlue(); // djm not needed
pen = new Pen(convertedColour);
alt = h;
}
g1.DrawLine(pen, x, y, x + 1, y);
}
// Cursor = Cursors.Cross; //jh not needed // setCursor(c1); // djm original java
message.Text = "Mandelbrot-Set ready - please select zoom area with pressed mouse."; // showStatus("Mandelbrot-Set ready - please select zoom area with pressed mouse."); // djm original java
action = true;
}
public static Color FromHSB(HSBColor 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))
);
}