public static HSVColor FromRGB(RGBColor rgb)
{
HSVColor hsv = new HSVColor();
float max = (float)Math.Max(rgb.r, Math.Max(rgb.g, rgb.b));
float min = (float)Math.Min(rgb.r, Math.Min(rgb.g, rgb.b));
hsv.value = max;
float delta = max - min;
if (max > float.Epsilon)
{
hsv.sat = delta / max;
}
else
{
// r = g = b = 0
hsv.sat = 0;
hsv.hue = float.NaN; // Undefined
return(hsv);
}
if (rgb.r == max)
{
hsv.hue = (rgb.g - rgb.b) / delta; // Between yellow and magenta
}
else if (rgb.g == max)
{
hsv.hue = 2 + (rgb.b - rgb.r) / delta; // Between cyan and yellow
}
else
{
hsv.hue = 4 + (rgb.r - rgb.g) / delta; // Between magenta and cyan
}
hsv.hue *= 60.0f; // degrees
if (hsv.hue < 0)
{
hsv.hue += 360;
}
return(hsv);
}
public static RGBColor Interpolate(RGBColor c1, RGBColor c2, float value)
{
return((c1 * (1.0f - value)) + (c2 * value));
}