private static void GetMinMaxChroma(
float c1, float c2, float c3,
out float min, out float max, out float chroma, out Color3MaxComponents maxComponent)
{
min = MathUtils.Min(c1, c2, c3);
max = MathUtils.Max(c1, c2, c3);
chroma = max - min;
if (chroma == 0)
{
maxComponent = Color3MaxComponents.Achromatic;
}
else if (max == c1)
{
maxComponent = Color3MaxComponents.c1;
}
else if (max == c2)
{
maxComponent = Color3MaxComponents.c2;
}
else
{
maxComponent = Color3MaxComponents.c3;
}
}
private static float CalculateHue(float c1, float c2, float c3, float chroma, Color3MaxComponents maxComponent)
{
var chroma6 = chroma * 6.0f;
switch (maxComponent)
{
case Color3MaxComponents.c1:
return((c2 - c3) / chroma6 + (c2 < c3 ? 1 : 0));
case Color3MaxComponents.c2:
return((c3 - c1) / chroma6 + (1.0f / 3.0f));
case Color3MaxComponents.c3:
return((c1 - c2) / chroma6 + (2.0f / 3.0f));
default:
throw new InternalException("Invalid color component");
}
}
