public void HowToComputeColorFromCCT()
{
double temperature = 3000; // in K
xyChromaticity chromaticity = CCTConverter.GetChromaticityOfCCT(temperature);
// asserts
Assert.Equal(0.43657898148148144, chromaticity.x, DoubleComparer);
Assert.Equal(0.4041745241092054, chromaticity.y, DoubleComparer);
IColorConverter <xyChromaticity, RGBColor> converter = new ConverterBuilder().Fromxy(Illuminants.D65).ToRGB(RGBWorkingSpaces.sRGB).Build();
RGBColor color = converter.Convert(chromaticity);
// asserts
Assert.Equal(1.282323002024544, color.R, DoubleComparer);
Assert.Equal(0.92870160729369322, color.G, DoubleComparer);
Assert.Equal(0.55886769485605214, color.B, DoubleComparer);
color = color.NormalizeIntensity();
// asserts
Assert.Equal(1, color.R, DoubleComparer);
Assert.Equal(0.72423375844264681, color.G, DoubleComparer);
Assert.Equal(0.4358244326692311, color.B, DoubleComparer);
color.ToRGB8Bit(out var r, out var g, out var b);
// asserts
Assert.Equal(255, r);
Assert.Equal(185, g);
Assert.Equal(111, b);
}
public void RangesOfChannelValuesAndClamping()
{
var x1 = (1.25).Clamp(0, 1);
var x2 = (-0.5).Clamp(0, 1);
var x3 = (0.75).Clamp(0, 1);
// asserts
Assert.Equal(1, x1);
Assert.Equal(0, x2);
Assert.Equal(0.75, x3);
var arr1 = new[] { 1.25, -0.5, 0.75 }.Clamp(0, 1);
// asserts
Assert.Equal(new[] { 1, 0, 0.75 }, arr1);
var arr2 = new[] { -50, 75, 1.25 }.Clamp(new double[] { 0, 0, 0 }, new double[] { 100, 100, 1 }); // { 0, 75, 1 }
// asserts
Assert.Equal(new double[] { 0, 75, 1 }, arr2);
var color1 = new RGBColor(2, -3, 0.5);
var color2 = color1.Clamp();
// asserts
Assert.Equal(new[] { 1, 0, 0.5 }, color2.Vector);
var color3 = color1.NormalizeIntensity(); // RGB [R=1, G=0, B=0.25]
// asserts
Assert.Equal(new[] { 1, 0, 0.25 }, color3.Vector);
// linear RGB
var linearColor = new LinearRGBColor(2, -3, 0.5);
var normalizedLinearColor = linearColor.NormalizeIntensity(); // LinearRGB [R=1, G=0, B=0.25]
// asserts
Assert.Equal(new[] { 1, 0, 0.25 }, normalizedLinearColor.Vector);
}
