/// <inheritdoc/>
public override void FromColor(Color color)
{
var cieXyz = new CieXyz();
cieXyz.FromColor(color);
var y = CieLab.PivotXyz(cieXyz.Y / CieXyz.WhiteReference.Y);
this.L = Math.Max(0, 116 * y - 16);
this.a = 500 * (CieLab.PivotXyz(cieXyz.X / CieXyz.WhiteReference.X) - y);
this.b = 200 * (y - CieLab.PivotXyz(cieXyz.Z / CieXyz.WhiteReference.Z));
}
/// <inheritdoc/>
public override void FromColor(Color color)
{
var cieXyz = new CieXyz();
cieXyz.FromColor(color);
var white = CieXyz.WhiteReference;
var y = cieXyz.Y / CieXyz.WhiteReference.Y;
this.L = y > CieXyz.T0 ? 116 * Math.Pow(y, 1d / 3) - 16 : CieLuv.Kappa *y;
var targetDenominator = CieLuv.GetDenominator(cieXyz);
var referenceDenominator = CieLuv.WhiteDenominator;
// ReSharper disable CompareOfFloatsByEqualityOperator
var xTarget = targetDenominator == 0 ? 0 : 4 * cieXyz.X / targetDenominator - 4 * white.X / referenceDenominator;
var yTarget = targetDenominator == 0 ? 0 : 9 * cieXyz.Y / targetDenominator - 9 * white.Y / referenceDenominator;
// ReSharper restore CompareOfFloatsByEqualityOperator
this.u = 13 * this.L * xTarget;
this.v = 13 * this.L * yTarget;
}