private Color RybAsUColor(Color color)
{
RYB rybColor = Khroma.RgbToRyb(color);
Color rybAsColor = new Color(rybColor.R, rybColor.Y, rybColor.B, rybColor.Alpha);
return(rybAsColor);
}
public static RYB RgbToRyb(Color rgba)
{
// Remove the white from the color
float white = Mathf.Min(rgba.r, rgba.g, rgba.b);
float r = rgba.r - white;
float g = rgba.g - white;
float b = rgba.b - white;
float maxG = Mathf.Max(r, g, b);
// Get the yellow out of the red+green
float y = Mathf.Min(r, g);
r -= y;
g -= y;
// If this unfortunate conversion combines blue and green, then cut each in half to
// preserve the value's maximum range.
if (b > 0 && g > 0)
{
b /= 2f;
g /= 2f;
}
// Redistribute the remaining green.
y += g;
b += g;
// Normalize to values.
float maxY = Mathf.Max(r, y, b);
if (maxY > 0)
{
float iN = maxG / maxY;
r *= iN;
y *= iN;
b *= iN;
}
// Add the white back in.
r += white;
y += white;
b += white;
RYB ryb = new RYB(r, y, b, rgba.a);
return(ryb);
}
public static Color RybToRgb(RYB ryba)
{
// Remove the whiteness from the color.
float white = Mathf.Min(ryba.R, ryba.Y, ryba.B);
float r = ryba.R - white;
float y = ryba.Y - white;
float b = ryba.B - white;
float maxY = Mathf.Max(r, y, b);
// Get the green out of the yellow and blue
float g = Mathf.Min(y, b);
y -= g;
b -= g;
if (b > 0 && g > 0)
{
b *= 2f;
g *= 2f;
}
// Redistribute the remaining yellow.
r += y;
g += y;
// Normalize to values.
float maxG = Mathf.Max(r, g, b);
if (maxG > 0)
{
var iN = maxY / maxG;
r *= iN;
g *= iN;
b *= iN;
}
// Add the white back in.
r += white;
g += white;
b += white;
Color rgb = new Color(r, g, b, ryba.Alpha);
return(rgb);
}
private RYB RybAsUColorReverse(Color rgb)
{
RYB color = new RYB(rgb.r, rgb.g, rgb.b, rgb.a);
return(color);
}