The other day i had to figure out how to convert HSV to RGB using C#, and after browsing the net i could only find C sample code to do it with, so i had to convert to C#. The code may be useful to someone out there (please let me know if it is):
/// <summary>
/// Convert HSV to RGB
/// h is from 0-360
/// s,v values are 0-1
/// r,g,b values are 0-255
/// Based upon http://ilab.usc.edu/wiki/index.php/HSV_And_H2SV_Color_Space#HSV_Transformation_C_.2F_C.2B.2B_Code_2
/// </summary>
void HsvToRgb(double h, double S, double V, out int r, out int g, out int b)
{
  // ######################################################################
  // T. Nathan Mundhenk
  // [email protected]
  // C/C++ Macro HSV to RGB

  double H = h;
  while (H < 0) { H += 360; };
  while (H >= 360) { H -= 360; };
  double R, G, B;
  if (V <= 0)
    { R = G = B = 0; }
  else if (S <= 0)
  {
    R = G = B = V;
  }
  else
  {
    double hf = H / 60.0;
    int i = (int)Math.Floor(hf);
    double f = hf - i;
    double pv = V * (1 - S);
    double qv = V * (1 - S * f);
    double tv = V * (1 - S * (1 - f));
    switch (i)
    {

      // Red is the dominant color

      case 0:
        R = V;
        G = tv;
        B = pv;
        break;

      // Green is the dominant color

      case 1:
        R = qv;
        G = V;
        B = pv;
        break;
      case 2:
        R = pv;
        G = V;
        B = tv;
        break;

      // Blue is the dominant color

      case 3:
        R = pv;
        G = qv;
        B = V;
        break;
      case 4:
        R = tv;
        G = pv;
        B = V;
        break;

      // Red is the dominant color

      case 5:
        R = V;
        G = pv;
        B = qv;
        break;

      // Just in case we overshoot on our math by a little, we put these here. Since its a switch it won't slow us down at all to put these here.

      case 6:
        R = V;
        G = tv;
        B = pv;
        break;
      case -1:
        R = V;
        G = pv;
        B = qv;
        break;

      // The color is not defined, we should throw an error.

      default:
        //LFATAL("i Value error in Pixel conversion, Value is %d", i);
        R = G = B = V; // Just pretend its black/white
        break;
    }
  }
  r = Clamp((int)(R * 255.0));
  g = Clamp((int)(G * 255.0));
  b = Clamp((int)(B * 255.0));
}

/// <summary>
/// Clamp a value to 0-255
/// </summary>
int Clamp(int i)
{
  if (i < 0) return 0;
  if (i > 255) return 255;
  return i;
}
And here's how you'd use it:
int r,g,b;
HsvToRgb(110, 1, 1, out r, out g, out b);

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