/// <summary>
/// Gets a color from color wheel based on index and rgbSeed.
/// </summary>
/// <param name="index">Index of the layer</param>
/// <param name="saturation">Saturation value</param>
/// <returns></returns>
public static CGColor ColorWheel(int index, float saturation = 1f)
{
if (!seedSet)
{
RgbSeed = Metronome.GetRandomNum();
seedSet = true;
}
int degrees = ((25 * index) + (int)(360 * RgbSeed / 100)) % 360;
nfloat min = 1 - saturation;
int degreesMod = degrees == 0 ? 0 : degrees % 60 == 0 ? 60 : degrees % 60;
nfloat stepSize = (1 - min) / 60;
nfloat red, green, blue;
if (degrees <= 60)
{
red = 1;
green = min + degreesMod * stepSize;
blue = min;
}
else if (degrees <= 120)
{
red = 1 - degreesMod * stepSize;
green = 1;
blue = min;
}
else if (degrees <= 180)
{
red = min;
green = 1;
blue = min + degreesMod * stepSize;
}
else if (degrees <= 240)
{
red = min;
green = 1 - degreesMod * stepSize;
blue = 1;
}
else if (degrees <= 300)
{
red = min + degreesMod * stepSize;
green = min;
blue = 1;
}
else
{
red = 1;
green = min;
blue = 1 - degreesMod * stepSize;
}
return(new CGColor(
red,
green,
blue,
1
));
}