private static IterationValue[,] CalculateIterationDepths(Size imageSize, ComplexNumber topLeft, ComplexNumber bottomRight, int maxIterationDepth, double threshold)
{
IterationValue[,] iterations = new IterationValue[imageSize.Width, imageSize.Height];
double realRange = bottomRight.RealPart - topLeft.RealPart;
double imaginaryRange = topLeft.ImaginaryPart - bottomRight.ImaginaryPart;
var mandelbrotComputer = new MandelbrotComputer(maxIterationDepth, threshold);
double realResolution = realRange / imageSize.Width;
double imaginaryResolution = imaginaryRange / imageSize.Height;
Action<int> computeIteration = x =>
{
double xResolution = x * realResolution;
for (int y = 0; y < imageSize.Height; y++)
{
double realPart = topLeft.RealPart + xResolution;
double imaginaryPart = topLeft.ImaginaryPart - y * imaginaryResolution;
var z = new ComplexNumber(realPart, imaginaryPart);
iterations[x, y] = mandelbrotComputer.ComputeIterationDepthFor(z);
}
};
Parallel.For(0, imageSize.Width, computeIteration);
return iterations;
}
public void MultiplyWith(ComplexNumber number)
{
double currentRealPart = RealPart;
RealPart = RealPart * number.RealPart - ImaginaryPart * number.ImaginaryPart;
ImaginaryPart = currentRealPart * number.ImaginaryPart + ImaginaryPart * number.RealPart;
}
public byte[] Draw(Size imageSize, ComplexNumber topLeft, ComplexNumber bottomRight, int maxIterationDepth = 199, double threshold = 2.0)
{
IterationValue[,] iterations = CalculateIterationDepths(imageSize, topLeft, bottomRight, maxIterationDepth, threshold);
using (var bitmap = new Bitmap(imageSize.Width, imageSize.Height))
{
DrawMandelbrotSet(bitmap, iterations, maxIterationDepth);
return SaveImageToByteArray(bitmap);
}
}
public ActionResult Drawing(int width, int height, int maxIterationDepth, double threshold,
double realFrom, double realTo, double imaginaryFrom, double imaginaryTo)
{
var imageSize = GetImageSize(width, height);
var topLeft = new ComplexNumber(realFrom, imaginaryFrom);
var bottomRight = new ComplexNumber(realTo, imaginaryTo);
var mandelbrotDrawer = new MandelbrotDrawer();
byte[] mandelbrotBytes = mandelbrotDrawer.Draw(imageSize, topLeft, bottomRight, maxIterationDepth, threshold);
return File(mandelbrotBytes, "image/png");
}
public void Add(ComplexNumber number)
{
RealPart += number.RealPart;
ImaginaryPart += number.ImaginaryPart;
}
public void Add(ComplexNumber number)
{
RealPart += number.RealPart;
ImaginaryPart += number.ImaginaryPart;
}
private static IterationValue[,] CalculateIterationDepths(Size imageSize, ComplexNumber topLeft, ComplexNumber bottomRight, int maxIterationDepth, double threshold)
{
IterationValue[,] iterations = new IterationValue[imageSize.Width, imageSize.Height];
double realRange = bottomRight.RealPart - topLeft.RealPart;
double imaginaryRange = topLeft.ImaginaryPart - bottomRight.ImaginaryPart;
var mandelbrotComputer = new MandelbrotComputer(maxIterationDepth, threshold);
double realResolution = realRange / imageSize.Width;
double imaginaryResolution = imaginaryRange / imageSize.Height;
Action <int> computeIteration = x =>
{
double xResolution = x * realResolution;
for (int y = 0; y < imageSize.Height; y++)
{
double realPart = topLeft.RealPart + xResolution;
double imaginaryPart = topLeft.ImaginaryPart - y * imaginaryResolution;
var z = new ComplexNumber(realPart, imaginaryPart);
iterations[x, y] = mandelbrotComputer.ComputeIterationDepthFor(z);
}
};
Parallel.For(0, imageSize.Width, computeIteration);
return(iterations);
}