// Create the threads
public void Generate()
{
// Create array of WParts
WpArray = new WPart[NO_OF_THREADS];
// Create array of ManualResetEvents
ManualResetEvent[] doneEvents = new ManualResetEvent[NO_OF_THREADS];
double x_step = (FC.fractalArea.x2 - FC.fractalArea.x1) / NO_OF_THREADS;
for (int i = 0; i < NO_OF_THREADS; i++)
{
doneEvents[i] = new ManualResetEvent(false);
FractalArea fa_temp = new FractalArea
{
x1 = FC.fractalArea.x1 + x_step * i,
x2 = FC.fractalArea.x1 + x_step * i + x_step,
y1 = FC.fractalArea.y1,
y2 = FC.fractalArea.y2
};
WPart WP = new WPart(FC.width / NO_OF_THREADS, FC.height, FC.fractalType, FC.w_max, fa_temp, FC.dx, FC.dy, doneEvents[i]);
WpArray[i] = WP;
ThreadPool.QueueUserWorkItem(WP.ThreadPoolCallback, i);
}
Calculating = true;
// Wait for all threads in pool to complete
foreach (var e in doneEvents)
{
e.WaitOne();
}
Calculating = false;
Application.DoEvents();
Draw();
PB.Image = DrawArea;
}
//Colorise and display the fractal
public void Draw()
{
int wi;
for (int i = 0; i < NO_OF_THREADS; i++)
{
WPart WP = WpArray[i];
for (int Xcount = 0; Xcount < WP.width; Xcount++)
{
for (int Ycount = 0; Ycount < WP.height; Ycount++)
{
// Draw pixel
wi = WP.w_data[Xcount, Ycount];
if (wi < FC.w_max)
{
const byte alpha = 255;
byte red = Convert.ToByte(FC.R * wi / FC.w_max);
byte green = Convert.ToByte(FC.G * wi / FC.w_max);
byte blue = Convert.ToByte(FC.B * wi / FC.w_max);
byte[] color = { alpha, red, green, blue };
if (BitConverter.IsLittleEndian)
{
Array.Reverse(color);
}
DrawArea.SetPixel(Xcount + WP.width * i, Ycount, Color.FromArgb(BitConverter.ToInt32(color, 0)));
}
else
{
DrawArea.SetPixel(Xcount + WP.width * i, Ycount, Color.Black);
}
}
}
}
}
