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77 changes: 77 additions & 0 deletions
77
Content.Client/UserInterface/Systems/ProgressColorSystem.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,77 @@ | ||
| using Content.Shared.CCVar; | ||
| using Robust.Shared.Configuration; | ||
|
|
||
| namespace Content.Client.UserInterface.Systems; | ||
|
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| /// <summary> | ||
| /// This system handles getting an interpolated color based on the value of a cvar. | ||
| /// </summary> | ||
| public sealed class ProgressColorSystem : EntitySystem | ||
| { | ||
| [Dependency] private readonly IConfigurationManager _configuration = default!; | ||
|
|
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| private bool _colorBlindFriendly; | ||
|
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| private static readonly Color[] Plasma = | ||
| { | ||
| new(240, 249, 33), | ||
| new(248, 149, 64), | ||
| new(204, 71, 120), | ||
| new(126, 3, 168), | ||
| new(13, 8, 135) | ||
| }; | ||
|
|
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| /// <inheritdoc/> | ||
| public override void Initialize() | ||
| { | ||
| Subs.CVar(_configuration, CCVars.AccessibilityColorblindFriendly, OnColorBlindFriendlyChanged, true); | ||
| } | ||
|
|
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| private void OnColorBlindFriendlyChanged(bool value, in CVarChangeInfo info) | ||
| { | ||
| _colorBlindFriendly = value; | ||
| } | ||
|
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| public Color GetProgressColor(float progress) | ||
| { | ||
| if (!_colorBlindFriendly) | ||
| { | ||
| if (progress >= 1.0f) | ||
| { | ||
| return new Color(0f, 1f, 0f); | ||
| } | ||
|
|
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| // lerp | ||
| var hue = 5f / 18f * progress; | ||
| return Color.FromHsv((hue, 1f, 0.75f, 1f)); | ||
| } | ||
|
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| return InterpolateColorGaussian(Plasma, progress); | ||
| } | ||
|
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| /// <summary> | ||
| /// Interpolates between multiple colors based on a gaussian distribution. | ||
| /// Taken from https://stackoverflow.com/a/26103117 | ||
| /// </summary> | ||
| public static Color InterpolateColorGaussian(Color[] colors, double x) | ||
| { | ||
| double r = 0.0, g = 0.0, b = 0.0; | ||
| var total = 0f; | ||
| var step = 1.0 / (colors.Length - 1); | ||
| var mu = 0.0; | ||
| const double sigma2 = 0.035; | ||
|
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| foreach(var color in colors) | ||
| { | ||
| var percent = Math.Exp(-(x - mu) * (x - mu) / (2.0 * sigma2)) / Math.Sqrt(2.0 * Math.PI * sigma2); | ||
| total += (float) percent; | ||
| mu += step; | ||
|
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| r += color.R * percent; | ||
| g += color.G * percent; | ||
| b += color.B * percent; | ||
| } | ||
|
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| return new Color((float) r / total, (float) g / total, (float) b / total); | ||
| } | ||
| } |
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