//http://www.bobpowell.net/rgbhsb.htm
//h is stored from 0-360 the calcultion needs from 0-1 so we divide hsl.H by 360
public static Colour HslToRgb(HSL hsl)
{
double r = 0, g = 0, b = 0;
double h = hsl.H / 360;
double s = hsl.S, l = hsl.L;
double temp1, temp2;
if (l == 0)
{
r = g = b = 0;
}
else
{
if (s == 0)
{
r = g = b = l;
}
else
{
temp2 = ((l <= 0.5) ? l * (1.0 + s) : l + s - (l * s));
temp1 = 2.0 * hsl.L - temp2;
double[] t3 = new double[] { h + 1.0 / 3.0, h, h - 1.0 / 3.0 };
double[] clr = new double[] { 0, 0, 0 };
for (int i = 0; i < 3; i++)
{
if (t3[i] < 0)
t3[i] += 1.0;
if (t3[i] > 1)
t3[i] -= 1.0;
if (6.0 * t3[i] < 1.0)
clr[i] = temp1 + (temp2 - temp1) * t3[i] * 6.0;
else if (2.0 * t3[i] < 1.0)
clr[i] = temp2;
else if (3.0 * t3[i] < 2.0)
clr[i] = (temp1 + (temp2 - temp1) * ((2.0 / 3.0) - t3[i]) * 6.0);
else
clr[i] = temp1;
}
r = clr[0];
g = clr[1];
b = clr[2];
}
}
return Color.FromArgb((int)(255 * r), (int)(255 * g), (int)(255 * b));
}
//http://www.bobpowell.net/rgbhsb.htm
//h is stored from 0-360 the calcultion needs from 0-1 so we divide hsl.H by 360
public static Colour HslToRgb(HSL hsl)
{
double r = 0, g = 0, b = 0;
double h = hsl.H / 360;
double s = hsl.S, l = hsl.L;
double temp1, temp2;
if (l == 0)
{
r = g = b = 0;
}
else
{
if (s == 0)
{
r = g = b = l;
}
else
{
temp2 = ((l <= 0.5) ? l * (1.0 + s) : l + s - (l * s));
temp1 = 2.0 * hsl.L - temp2;
double[] t3 = new double[] { h + 1.0 / 3.0, h, h - 1.0 / 3.0 };
double[] clr = new double[] { 0, 0, 0 };
for (int i = 0; i < 3; i++)
{
if (t3[i] < 0)
{
t3[i] += 1.0;
}
if (t3[i] > 1)
{
t3[i] -= 1.0;
}
if (6.0 * t3[i] < 1.0)
{
clr[i] = temp1 + (temp2 - temp1) * t3[i] * 6.0;
}
else if (2.0 * t3[i] < 1.0)
{
clr[i] = temp2;
}
else if (3.0 * t3[i] < 2.0)
{
clr[i] = (temp1 + (temp2 - temp1) * ((2.0 / 3.0) - t3[i]) * 6.0);
}
else
{
clr[i] = temp1;
}
}
r = clr[0];
g = clr[1];
b = clr[2];
}
}
return(Color.FromArgb((int)(255 * r), (int)(255 * g), (int)(255 * b)));
}