private void draw_julia()
{
MyColor color = new MyColor();
Color[] cs = new Color[256];
cs = ColorMap.GetColors(13);
double newRe, newIm, oldRe, oldIm, Im, step_y, step_x;
Bitmap bp = new Bitmap(w, h);
int i;
interval_x = 3.0 / zoom;
if (w >= h)
{
interval_y = (w / h) * interval_x;
}
else
{
interval_y = (h / w) * interval_x;
}
double origo_x = (interval_x / 2.0) - move_x;
double origo_y = (interval_y / 2.0) - move_y;
step_x = interval_x / w;
step_y = interval_y / h;
for (int y = 0; y < h; y++)
{
Im = y * step_y - origo_y;
for (int x = 0; x < w; x++)
{
newRe = x * step_x - origo_x;
newIm = Im;
i = 0;
while (i < maxIterations)
{
oldRe = newRe;
oldIm = newIm;
newRe = oldRe * oldRe - oldIm * oldIm + cRe;
newIm = 2 * oldRe * oldIm + cIm;
if ((newRe * newRe + newIm * newIm) > 2)
{
break;
}
i++;
}
double perc = i / ((double)(maxIterations));
int val = ((int)(perc * 255));
bp.SetPixel(x, y, cs[val]);
}
}
var graphics = Graphics.FromImage(bp);
graphics.DrawLine(Pens.Black, w / 2, 0, w / 2, h);
graphics.DrawLine(Pens.Black, 0, h / 2, w, h / 2);
panel.BackgroundImage = bp;
}
private void draw_mandel()
{
Color[] cs = new Color[256];
cs = ColorMap.GetColors(5);
Bitmap bp = new Bitmap(width, height);
double x, y, x1, y1, xx;
int looper, s, z = 0;
double step_x, step_y = 0.0;
step_x = (xmax - xmin) / width / zoom;
step_y = (ymax - ymin) / height / zoom;
x = xmin;
for (s = 1; s < width; s++)
{
y = ymin;
for (z = 1; z < height; z++)
{
x1 = 0;
y1 = 0;
looper = 0;
while (looper < 100 && Math.Sqrt((x1 * x1) + (y1 * y1)) < 2)
{
looper++;
xx = (x1 * x1) - (y1 * y1) + x;
y1 = 2 * x1 * y1 + y;
x1 = xx;
}
double perc = looper / (100.0);
int val = ((int)(perc * 255));
bp.SetPixel(s, z, cs[val]);
y += step_y;
}
x += step_x;
}
panel.BackgroundImage = bp;
}