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0ae419326d
* Renames Spectre.Cli to Spectre.Console.Cli. * Now uses Verify with Spectre.Console.Cli tests. * Removes some duplicate definitions. Closes #168
78 lines
2.0 KiB
C#
78 lines
2.0 KiB
C#
using System;
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using Spectre.Console;
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namespace ColorExample
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{
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public static class Utilities
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{
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// Borrowed from https://geekymonkey.com/Programming/CSharp/RGB2HSL_HSL2RGB.htm
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public static Color HSL2RGB(double h, double sl, double l)
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{
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double v;
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double r, g, b;
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r = l; // default to gray
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g = l;
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b = l;
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v = (l <= 0.5) ? (l * (1.0 + sl)) : (l + sl - l * sl);
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if (v > 0)
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{
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double m;
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double sv;
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int sextant;
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double fract, vsf, mid1, mid2;
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m = l + l - v;
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sv = (v - m) / v;
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h *= 6.0;
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sextant = (int)h;
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fract = h - sextant;
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vsf = v * sv * fract;
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mid1 = m + vsf;
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mid2 = v - vsf;
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switch (sextant)
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{
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case 0:
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r = v;
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g = mid1;
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b = m;
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break;
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case 1:
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r = mid2;
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g = v;
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b = m;
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break;
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case 2:
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r = m;
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g = v;
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b = mid1;
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break;
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case 3:
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r = m;
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g = mid2;
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b = v;
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break;
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case 4:
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r = mid1;
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g = m;
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b = v;
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break;
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case 5:
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r = v;
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g = m;
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b = mid2;
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break;
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}
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}
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return new Color(
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Convert.ToByte(r * 255.0f),
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Convert.ToByte(g * 255.0f),
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Convert.ToByte(b * 255.0f));
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}
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}
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}
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