C#实现HSL颜色值转换为RGB的方法

本文实例讲述了c#实现hsl颜色值转换为rgb的方法。分享给大家供大家参考。具体实现方法如下：

//this method converts the values to rgb
public rgbcolor hsltorgb(int hue, int saturation, int lightness)
{
 double num4 = 0.0;
 double num5 = 0.0;
 double num6 = 0.0;
 double num = ((double)hue) % 360.0;
 double num2 = ((double)saturation) / 100.0;
 double num3 = ((double)lightness) / 100.0;
 if (num2 == 0.0)
 {
  num4 = num3;
  num5 = num3;
  num6 = num3;
 }
 else
 {
  double d = num / 60.0;
  int num11 = (int)math.floor(d);
  double num10 = d - num11;
  double num7 = num3 * (1.0 - num2);
  double num8 = num3 * (1.0 - (num2 * num10));
  double num9 = num3 * (1.0 - (num2 * (1.0 - num10)));
  switch (num11)
  {
   case 0:
    num4 = num3;
    num5 = num9;
    num6 = num7;
    break;
   case 1:
    num4 = num8;
    num5 = num3;
    num6 = num7;
    break;
   case 2:
    num4 = num7;
    num5 = num3;
    num6 = num9;
    break;
   case 3:
    num4 = num7;
    num5 = num8;
    num6 = num3;
    break;
   case 4:
    num4 = num9;
    num5 = num7;
    num6 = num3;
    break;
   case 5:
    num4 = num3;
    num5 = num7;
    num6 = num8;
    break;
  }
 }
 return new rgbcolor((int)(num4 * 255.0), (int)(num5 * 255.0), (int)(num6 * 255.0));
}
//the structure that will hold the rgb values
public struct rgbcolor
{
 public rgbcolor(int r, int g, int b)
 {
  red = r;
  green = g;
  blue = b;
 }
 public int red;
 public int green;
 public int blue;
}

希望本文所述对大家的c#程序设计有所帮助。