private static Color32 GetColor(double value)
{
var rgb = new Hls
{
H = 1 - value * 120,
L = .5,
S = .75
}.ToRgb();
return(new Color32(255, rgb.B, rgb.G, rgb.R));
}
public Hls ToHls()
{
var hls = new Hls();
var data = new[] { R, G, B };
var max = data.Max();
var min = data.Min();
var diff = max - min;
var result = new Hls();
result.L = (max + min) / 2;
if (Math.Abs(diff) < 0.00001)
{
result.S = 0;
result.H = 0; // H is really undefined.
return(result);
}
if (result.L <= 0.5)
{
result.S = diff / (max + min);
}
else
{
result.S = diff / (2 - max - min);
}
double r_dist = (max - R) / diff;
double g_dist = (max - G) / diff;
double b_dist = (max - B) / diff;
result.H =
R == max
? b_dist - g_dist
:
G == max
? 2 + r_dist - b_dist
: 4 + g_dist - r_dist;
result.H = result.H * 60;
if (result.H < 0)
{
result.H += 360;
}
return(result);
}