public int CalculateVals(Complex val, ref JuliaImage myModel)
{
int steps = 0;
Complex newCmp = val;
double magnitude = 0;
while (magnitude < myModel.Threshold && steps < myModel.Steps)
{
steps++;
var tempReal = (newCmp * newCmp) + myModel.Constant;
magnitude = tempReal.Magnitude;
newCmp = tempReal;
}
return(steps);
}
public ActionResult Index(JuliaImage myModel)
{
Dictionary <Tuple <int, int>, int> xypos = new Dictionary <Tuple <int, int>, int>();
//Clean up folder if its size is greater then a 1gb
var filesInPath = Directory.GetFiles(System.Configuration.ConfigurationManager.AppSettings["ImageDirectory"], "*.*");
long directorySize = 0;
foreach (string name in filesInPath)
{
FileInfo info = new FileInfo(name);
directorySize += info.Length;
}
//Rough estimate cant remember if its bytes or bits atm
if (directorySize > 1 * 1000 * 1000 * 1000)
{
foreach (string name in filesInPath)
{
try
{
System.IO.File.Delete(name);
}
catch//(Exception ex) //Supress and pass on
{
}
}
}
//These shouldnt happen
if (myModel == null)
{
myModel = new JuliaImage();
}
if (myModel.AlphaDivider <= 0)
{
myModel.AlphaDivider = 1;
}
if (myModel.RedDivider <= 0)
{
myModel.RedDivider = 1;
}
if (myModel.GreenDivider <= 0)
{
myModel.GreenDivider = 1;
}
if (myModel.BlueDivider <= 0)
{
myModel.BlueDivider = 1;
}
if (myModel.Steps <= 0 || myModel.Steps > 255)
{
myModel.Steps = 255;
}
if (myModel.Height <= 0)
{
myModel.Height = 500;
}
if (myModel.Width <= 0)
{
myModel.Width = 500;
}
//Init Constant
myModel.Constant = new Complex(myModel.ConstantReal, myModel.ConstantImaginary);
float height = myModel.Height;
float width = myModel.Width;
for (int i = 0; i <= width; i++)
{
for (int j = 0; j <= height; j++)
{
var result = CalculateVals(new Complex(i * 2 / width - 1, j * 2 / height - 1), ref myModel);
xypos.Add(new Tuple <int, int>(i, j), result);
}
}
Guid fileName = Guid.NewGuid();
using (Bitmap bmp = new Bitmap(Convert.ToInt32(width), Convert.ToInt32(height)))
{
using (Graphics g = Graphics.FromImage(bmp))
{
for (int x = 0; x <= width; x++)
{
for (int y = 0; y <= height; y++)
{
int value = xypos[new Tuple <int, int>(x, y)];
int av = Convert.ToInt32(value / myModel.AlphaDivider);
int rv = Convert.ToInt32(value / myModel.RedDivider);
int gv = Convert.ToInt32(value / myModel.GreenDivider);
int bv = Convert.ToInt32(value / myModel.BlueDivider);
if (av < 0 || av > 255)
{
av = 255;
}
if (rv < 0 || rv > 255)
{
rv = 255;
}
if (gv < 0 || gv > 255)
{
gv = 255;
}
if (bv < 0 || bv > 255)
{
bv = 255;
}
g.FillRectangle(new SolidBrush(
Color.FromArgb(
av, rv, gv, bv
)), new Rectangle(x, y, 1, 1));
}
}
}
bmp.Save(System.Configuration.ConfigurationManager.AppSettings["ImageDirectory"] + fileName.ToString() + ".png", ImageFormat.Png);
}
myModel.FilePath = "/Fractal/ImageResource/" + fileName.ToString();
return(View(myModel));
}
