private void UpdateHSB(HSB hsb)
{
if (Convert.ToInt32(hsb.Hue) != (int)this.hUD.Value)
{
this.hUD.Value = Convert.ToInt32(hsb.Hue);
}
if (Convert.ToInt32(hsb.Saturation * 100) != (int)this.sUD.Value)
{
this.sUD.Value = Convert.ToInt32(hsb.Saturation * 100);
}
if (Convert.ToInt32(hsb.Brightness * 100) != (int)this.bUD.Value)
{
this.bUD.Value = Convert.ToInt32(hsb.Brightness * 100);
}
}
/// <summary>
/// Converts HSB to Color.
/// </summary>
/// <param name="hsv">the HSB structure to convert.</param>
public static Color HSBtoColor(HSB hsb)
{
RGB rgb = HSBtoRGB(hsb);
return(Color.FromArgb(rgb.Red, rgb.Green, rgb.Blue));
}
/// <summary>
/// Converts HSB to RGB.
/// </summary>
/// <param name="hsv">The HSB structure to convert.</param>
public static RGB HSBtoRGB(HSB hsb)
{
double r = 0;
double g = 0;
double b = 0;
if (hsb.Saturation == 0)
{
r = g = b = hsb.Brightness;
}
else
{
// the color wheel consists of 6 sectors. Figure out which sector you're in.
double sectorPos = hsb.Hue / 60.0;
int sectorNumber = (int)(Math.Floor(sectorPos));
// get the fractional part of the sector
double fractionalSector = sectorPos - sectorNumber;
// calculate values for the three axes of the color.
double p = hsb.Brightness * (1.0 - hsb.Saturation);
double q = hsb.Brightness * (1.0 - (hsb.Saturation * fractionalSector));
double t = hsb.Brightness * (1.0 - (hsb.Saturation * (1 - fractionalSector)));
// assign the fractional colors to r, g, and b based on the sector the angle is in.
switch (sectorNumber)
{
case 0:
r = hsb.Brightness;
g = t;
b = p;
break;
case 1:
r = q;
g = hsb.Brightness;
b = p;
break;
case 2:
r = p;
g = hsb.Brightness;
b = t;
break;
case 3:
r = p;
g = q;
b = hsb.Brightness;
break;
case 4:
r = t;
g = p;
b = hsb.Brightness;
break;
case 5:
r = hsb.Brightness;
g = p;
b = q;
break;
}
}
return(new RGB(
Convert.ToInt32(Double.Parse(String.Format("{0:0.00}", r * 255.0))),
Convert.ToInt32(Double.Parse(String.Format("{0:0.00}", g * 255.0))),
Convert.ToInt32(Double.Parse(String.Format("{0:0.00}", b * 255.0)))
));
}