public static Hsv ToHsv(this Rgb rgb)
{
var r_ = rgb.R / 255.0f;
var g_ = rgb.G / 255.0f;
var b_ = rgb.B / 255.0f;
var cMax = Math.Max(r_, Math.Max(g_, b_));
var cMin = Math.Min(r_, Math.Min(g_, b_));
var d = cMax - cMin;
var hue = Hue(d, r_, g_, b_, cMax);
var saturation = cMax == 0.0f ? 0.0f : d / cMax;
var value = cMax;
return(new Hsv(hue, saturation, value));
}
private static Rgb HsvToRgb(float h, float s, float v)
{
int hi = (int)Math.Floor(h / 60.0) % 6;
float f = (h / 60.0f) - (float)Math.Floor(h / 60.0);
float p = v * (1.0f - s);
float q = v * (1.0f - (f * s));
float t = v * (1.0f - ((1.0f - f) * s));
Rgb ret;
switch (hi)
{
case 0:
ret = GetRgb(v, t, p);
break;
case 1:
ret = GetRgb(q, v, p);
break;
case 2:
ret = GetRgb(p, v, t);
break;
case 3:
ret = GetRgb(p, q, v);
break;
case 4:
ret = GetRgb(t, p, v);
break;
case 5:
ret = GetRgb(v, p, q);
break;
default:
ret = new Rgb(0x00, 0x00, 0x00);
break;
}
return(ret);
}
