/// <summary>
/// Set the L, A and B values from XYZ colorspace value
/// </summary>
/// <param name="xyz">color the color to transform</param>
public void SetFromXYZ(XYZColor xyz)
{
float fX = F(xyz.X / XYZColor.Reference.X);
float fY = F(xyz.Y / XYZColor.Reference.Y);
float fZ = F(xyz.Z / XYZColor.Reference.Z);
L = 116 * fY - 16.0f;
A = 500 * (fX - fY);
B = 200 * (fY - fZ);
Transparency = xyz.A;
}
/// <summary>
/// Set the L, U and V values from XYZ colorspace value
/// </summary>
/// <param name="xyz">the color to transform</param>
public void SetFromXYZ(XYZColor xyz)
{
float un = 4 * XYZColor.Reference.X / (XYZColor.Reference.X + 15 * XYZColor.Reference.Y + 3 * XYZColor.Reference.Z);
float vn = 9 * XYZColor.Reference.Y / (XYZColor.Reference.X + 15 * XYZColor.Reference.Y + 3 * XYZColor.Reference.Z);
float y = xyz.Y / XYZColor.Reference.Y;
if (y < 0.008856f) //(6/29)**3 = 0.008856
{
L = 903.296296f * y; //(29/3)**3 = 903.296296
}
else
{
L = 116.0f * (float)(Math.Pow(y, 1.0f / 3.0f)) - 16.0f;
}
U = 13.0f * L * (4.0f * xyz.X / (xyz.X + 15.0f * xyz.Y + 3.0f * xyz.Z) - un);
V = 13.0f * L * (9.0f * xyz.Y / (xyz.X + 15.0f * xyz.Y + 3.0f * xyz.Z) - vn);
A = xyz.A;
}
/// <summary>
/// Convert a XYZ colorspace value into a MSH colorspace value
/// </summary>
/// <param name="color">The XYZ value</param>
public void FromXYZ(XYZColor color)
{
FromLABColor(new LABColor(color));
}
/// <summary>
/// MSH Constructor initialized from XYZ
/// </summary>
/// <param name="color">The XYZ color to convert</param>
public MSHColor(XYZColor color)
{
FromLABColor(new LABColor(color));
}
/// <summary>
/// Set the L, U and V values from RGB colorspace value
/// </summary>
/// <param name="color">the color to transform</param>
public void SetFromRGB(Color color)
{
XYZColor xyz = new XYZColor(color);
SetFromXYZ(xyz);
}
/// <summary>
/// Constructor, determines L, U and V values from XYZ colorspace
/// </summary>
/// <param name="xyz">The XYZ color value</param>
public LUVColor(XYZColor xyz)
{
SetFromXYZ(xyz);
}
/// <summary>
/// MSH Constructor initialized from XYZ
/// </summary>
/// <param name="color">The XYZ color to convert</param>
public MSHColor(XYZColor color)
{
M = S = H = A = 0;
FromLABColor(new LABColor(color));
}
/// <summary>
/// Constructor, determines L, U and V values from XYZ colorspace
/// </summary>
/// <param name="xyz">The XYZ color value</param>
public LUVColor(XYZColor xyz)
{
L = U = V = A = 0;
SetFromXYZ(xyz);
}
/// <summary>
/// Constructor, determines L, A and B values from XYZ colorspace
/// </summary>
/// <param name="xyz">The XYZ color to transform</param>
public LABColor(XYZColor xyz)
{
L = A = B = Transparency = 0;
SetFromXYZ(xyz);
}
