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Add LUV support See merge request Wacton/Unicolour!9
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,131 @@ | ||
| namespace Wacton.Unicolour.Tests; | ||
|
|
||
| using System; | ||
| using NUnit.Framework; | ||
| using Wacton.Unicolour.Tests.Utils; | ||
|
|
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| /* | ||
| * Conversions that are just translations to/from cylindrical coordinate spaces | ||
| * should have input values clamped to the range of the source coordinate space | ||
| * otherwise they will be mapped to incorrect values | ||
| * e.g. RGB with negative -> HSB should produce the same value as RGB with zero -> HSB | ||
| */ | ||
| public class CoordinateSpaceTests | ||
| { | ||
| [Test] | ||
| public void CartesianRgbToCylindricalHsb() | ||
| { | ||
| ColourTriplet upperOutRange = new(1.00001, 100, double.PositiveInfinity); | ||
| ColourTriplet upperInRange = new(1, 1, 1); | ||
| ColourTriplet lowerOutRange = new(-0.00001, -100, double.NegativeInfinity); | ||
| ColourTriplet lowerInRange = new(0, 0, 0); | ||
| AssertRgbToHsb(upperInRange, upperOutRange); | ||
| AssertRgbToHsb(lowerInRange, lowerOutRange); | ||
| } | ||
|
|
||
| [Test] | ||
| public void CylindricalHsbToCartesianRgb() | ||
| { | ||
| ColourTriplet upperOutRange = new(360.00001, 100, double.PositiveInfinity); | ||
| ColourTriplet upperInRange = new(0.00001, 1, 1); | ||
| ColourTriplet lowerOutRange = new(-0.00001, -100, double.NegativeInfinity); | ||
| ColourTriplet lowerInRange = new(359.99999, 0, 0); | ||
| AssertHsbToRgb(upperInRange, upperOutRange); | ||
| AssertHsbToRgb(lowerInRange, lowerOutRange); | ||
| } | ||
|
|
||
| [Test] | ||
| public void CylindricalHsbToCylindricalHsl() | ||
| { | ||
| ColourTriplet upperOutRange = new(360.00001, 100, double.PositiveInfinity); | ||
| ColourTriplet upperInRange = new(0.00001, 1, 1); | ||
| ColourTriplet lowerOutRange = new(-0.00001, -100, double.NegativeInfinity); | ||
| ColourTriplet lowerInRange = new(359.99999, 0, 0); | ||
| AssertHsbToHsl(upperInRange, upperOutRange); | ||
| AssertHsbToHsl(lowerInRange, lowerOutRange); | ||
| } | ||
|
|
||
| [Test] | ||
| public void CylindricalHslToCylindricalHsb() | ||
| { | ||
| ColourTriplet upperOutRange = new(360.00001, 100, double.PositiveInfinity); | ||
| ColourTriplet upperInRange = new(0.00001, 1, 1); | ||
| ColourTriplet lowerOutRange = new(-0.00001, -100, double.NegativeInfinity); | ||
| ColourTriplet lowerInRange = new(359.99999, 0, 0); | ||
| AssertHslToHsb(upperInRange, upperOutRange); | ||
| AssertHslToHsb(lowerInRange, lowerOutRange); | ||
| } | ||
|
|
||
| private static void AssertRgbToHsb(ColourTriplet inRange, ColourTriplet outRange) | ||
| { | ||
| Rgb GetInput(ColourTriplet triplet) => new(triplet.First, triplet.Second, triplet.Third, Configuration.Default); | ||
| var inRangeInput = GetInput(inRange); | ||
| var outRangeInput = GetInput(outRange); | ||
|
|
||
| Hsb GetOutput(Rgb rgb) => Conversion.RgbToHsb(rgb); | ||
| var inRangeOutput = GetOutput(inRangeInput); | ||
| var outRangeOutput = GetOutput(outRangeInput); | ||
|
|
||
| AssertTriplets( | ||
| AsTriplets(inRangeInput), AsTriplets(outRangeInput), | ||
| AsTriplets(inRangeOutput), AsTriplets(outRangeOutput)); | ||
| } | ||
|
|
||
| private static void AssertHsbToRgb(ColourTriplet inRange, ColourTriplet outRange) | ||
| { | ||
| Hsb GetInput(ColourTriplet triplet) => new(triplet.First, triplet.Second, triplet.Third); | ||
| var inRangeInput = GetInput(inRange); | ||
| var outRangeInput = GetInput(outRange); | ||
|
|
||
| Rgb GetOutput(Hsb hsb) => Conversion.HsbToRgb(hsb, Configuration.Default); | ||
| var inRangeOutput = GetOutput(inRangeInput); | ||
| var outRangeOutput = GetOutput(outRangeInput); | ||
|
|
||
| AssertTriplets( | ||
| AsTriplets(inRangeInput), AsTriplets(outRangeInput), | ||
| AsTriplets(inRangeOutput), AsTriplets(outRangeOutput)); | ||
| } | ||
|
|
||
| private static void AssertHsbToHsl(ColourTriplet inRange, ColourTriplet outRange) | ||
| { | ||
| Hsb GetInput(ColourTriplet triplet) => new(triplet.First, triplet.Second, triplet.Third); | ||
| var inRangeInput = GetInput(inRange); | ||
| var outRangeInput = GetInput(outRange); | ||
|
|
||
| Hsl GetOutput(Hsb hsb) => Conversion.HsbToHsl(hsb); | ||
| var inRangeOutput = GetOutput(inRangeInput); | ||
| var outRangeOutput = GetOutput(outRangeInput); | ||
|
|
||
| AssertTriplets( | ||
| AsTriplets(inRangeInput), AsTriplets(outRangeInput), | ||
| AsTriplets(inRangeOutput), AsTriplets(outRangeOutput)); | ||
| } | ||
|
|
||
| private static void AssertHslToHsb(ColourTriplet inRange, ColourTriplet outRange) | ||
| { | ||
| Hsl GetInput(ColourTriplet triplet) => new(triplet.First, triplet.Second, triplet.Third); | ||
| var inRangeInput = GetInput(inRange); | ||
| var outRangeInput = GetInput(outRange); | ||
|
|
||
| Hsb GetOutput(Hsl hsl) => Conversion.HslToHsb(hsl); | ||
| var inRangeOutput = GetOutput(inRangeInput); | ||
| var outRangeOutput = GetOutput(outRangeInput); | ||
|
|
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| AssertTriplets( | ||
| AsTriplets(inRangeInput), AsTriplets(outRangeInput), | ||
| AsTriplets(inRangeOutput), AsTriplets(outRangeOutput)); | ||
| } | ||
|
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||
| private static void AssertTriplets(Triplets inRangeInput, Triplets outRangeInput, Triplets inRangeOutput, Triplets outRangeOutput) | ||
| { | ||
| AssertUtils.AssertColourTriplet(outRangeInput.Constrained, inRangeInput.Unconstrained, 0.00001); | ||
| AssertUtils.AssertColourTriplet(outRangeOutput.Unconstrained, inRangeOutput.Unconstrained, 0.00001); | ||
| AssertUtils.AssertColourTriplet(outRangeOutput.Constrained, inRangeOutput.Unconstrained, 0.00001); | ||
| } | ||
|
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| private static Triplets AsTriplets(Rgb rgb) => new(rgb.Triplet, rgb.ConstrainedTriplet); | ||
| private static Triplets AsTriplets(Hsb hsb) => new(hsb.Triplet, hsb.ConstrainedTriplet); | ||
| private static Triplets AsTriplets(Hsl hsl) => new(hsl.Triplet, hsl.ConstrainedTriplet); | ||
|
|
||
| private record Triplets(ColourTriplet Unconstrained, ColourTriplet Constrained); | ||
| } |
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