public static Color calcColor(double x, double y, int maxIter, String colorScheme) // returnt kleur van mandelbrotgetal van bijbehorende coordinaten
{
int colorInt = Mandelbrot.calcIter(x, y, maxIter);
Color result;
int[] highIterRGB = new int[] { 255, 0, 0 }; // defining the color set for MaxIter and potentially other Color Sets
int[] lowIterRGB = new int[] { 0, 255, 0 }; // idem dito
double a = (double)colorInt / maxIter; // calculate coefficient for convex combination of high and low arrays
int[] resultRGB = new int[3];
if (colorScheme == "Rainbow")
{
/**
* The Rainbow
*/
resultRGB[0] = (int)((Math.Sin((double)colorInt * 0.1) + 1) * 126);
resultRGB[1] = (int)((Math.Sin((double)(colorInt - 80) * 0.1) + 1) * 126);
resultRGB[2] = (int)((Math.Sin((double)(colorInt - 160) * 0.1) + 1) * 126);
}
else if (colorScheme == "Grass")
{
resultRGB[0] = (int)((Math.Sin((double)(colorInt - 80) * 0.01) + 1) * 126);
resultRGB[1] = (int)((Math.Sin((double)(colorInt) * 0.01) + 1) * 126);
resultRGB[2] = (int)((Math.Sin((double)(colorInt - 160) * 0.01) + 1) * 126);
}
else if (colorScheme == "MaxIter")
{
for (int i = 0; i < 3; i++)
{
resultRGB[i] = (int)(a * highIterRGB[i] + (1 - a) * lowIterRGB[i]);
}
}
else if (colorScheme == "White")
{
if (colorInt % 2 == 0 && colorInt != maxIter)
{
resultRGB[0] = 255;
resultRGB[1] = 255;
resultRGB[2] = 255;
}
}
else
{
resultRGB[0] = (int)Math.Pow(colorInt % 255, 2) / 500 + 100;
resultRGB[1] = (int)Math.Pow((colorInt - 128) % 255, 2) / 500 + 100;
resultRGB[2] = (int)Math.Pow((colorInt - 296) % 255, 2) / 500 + 100;
}
result = Color.FromArgb(resultRGB[0], resultRGB[1], resultRGB[2]);
if (colorInt == maxIter)
{
result = Color.Black;
}
return(result);
}
private void redrawBitmap() // berekent opnieuw de bitmap en update de picturebox om de verandering te laten zien
{
Graphics gr = Graphics.FromImage(this.mandelbrotBM);
// Voor elke pixel worden de wiskundige coordinaten uitgerekend
// De pixel wordt vervolgens gekleurd naar de juiste kleur
for (int i = 0; i < this.mandelbrotBM.Width; i++)
{
for (int j = 0; j < this.mandelbrotBM.Height; j++)
{
double x = (i - (double)this.mandelbrotBM.Width / 2) * this.scale + this.centerX;
double y = (j - (double)this.mandelbrotBM.Height / 2) * this.scale + this.centerY;
this.mandelbrotBM.SetPixel(i, j, Mandelbrot.calcColor(x, y, this.maxIter, this.colorScheme));
}
}
gr.DrawImage(this.mandelbrotBM, 0, 0, this.mandelbrotBM.Width, this.mandelbrotBM.Height);
mandelbrotPB.Image = this.mandelbrotBM;
}
