/// <summary>
/// Converts <see cref="HSBColour"/> to <see cref="RgbColor"/>.
/// </summary>
/// <param name="hsb">The <see cref="HSBColour"/>.</param>
/// <returns>A <see cref="RgbColor"/> equivalent.</returns>
public static RGBColour HSBToRGB(HSBColour hsb)
{
double red = 0, green = 0, blue = 0;
double h = hsb.Hue;
double s = ((double)hsb.Saturation) / 100;
double b = ((double)hsb.Brightness) / 100;
if (s == 0)
{
red = b;
green = b;
blue = b;
}
else
{
// the color wheel has six sectors.
double sectorPosition = h / 60;
var sectorNumber = (int)Math.Floor(sectorPosition);
double fractionalSector = sectorPosition - sectorNumber;
double p = b * (1 - s);
double q = b * (1 - (s * fractionalSector));
double t = b * (1 - (s * (1 - fractionalSector)));
// Assign the fractional colors to r, g, and b
// based on the sector the angle is in.
switch (sectorNumber)
{
case 0:
red = b;
green = t;
blue = p;
break;
case 1:
red = q;
green = b;
blue = p;
break;
case 2:
red = p;
green = b;
blue = t;
break;
case 3:
red = p;
green = q;
blue = b;
break;
case 4:
red = t;
green = p;
blue = b;
break;
case 5:
red = b;
green = p;
blue = q;
break;
}
}
var nRed = (int)Math.Round(red * 255);
var nGreen = (int)Math.Round(green * 255);
var nBlue = (int)Math.Round(blue * 255);
return(new RGBColour(nRed, nGreen, nBlue));
}
/// <summary>
/// Creates from a given color.
/// </summary>
/// <param name="colour">The color.</param>
/// <returns></returns>
public static HSBColour FromHSBColour(HSBColour colour)
{
return(new HSBColour(colour.Hue, colour.Saturation, colour.Brightness));
}
/// <summary>
/// Creates from a given color.
/// </summary>
/// <param name="colour">The color.</param>
/// <returns></returns>
public static HSLColour FromHSBColour(HSBColour colour)
{
return(FromRGBColour(colour.ToRGBColour()));
}
/// <summary>
/// Creates from a given color.
/// </summary>
/// <param name="colour">The color.</param>
/// <returns></returns>
public static RGBColour FromHSBColour(HSBColour colour)
{
return(colour.ToRGBColour());
}
