Ergonomic: Add CreateRgbShaderMaterial and pageDescription

Scaffolding/Content/ModEventTemplate.cs

@@ -1,5 +1,6 @@
 using Godot;
 using MegaCrit.Sts2.Core.Events;
+using MegaCrit.Sts2.Core.Localization;
 using MegaCrit.Sts2.Core.Models;
 using STS2RitsuLib.Scaffolding.Content.Patches;
 
@@ -94,6 +95,11 @@ protected string ModOptionKey(string pageName, string optionName)
             return ModOptionKey("INITIAL", optionName);
         }
 
+        /// <summary>
+        ///     Gets the localized description for a page.
+        /// </summary>
+        protected LocString PageDescription(string pageName) => L10NLookup($"{Id.Entry}.pages.{pageName}.description");
+
         /// <summary>
         ///     Creates a relic-grant option for a mutable relic resolved from <typeparamref name="T" />.
         /// </summary>

Utils/MaterialUtils.cs

@@ -19,14 +19,35 @@ public static class MaterialUtils
         private static NoiseTexture2D VanillaDoomBarNoiseTexture =>
             _vanillaDoomBarNoiseTexture ??= CreateVanillaDoomBarNoiseTexture();
 
+        /// <summary>
+        ///     Builds a <c>ShaderMaterial</c> using the game's HSV shader with the given RGB parameters.
+        /// </summary>
+        public static ShaderMaterial CreateRgbShaderMaterial(float r, float g, float b)
+        {
+            var max = Math.Max(r, Math.Max(g, b));
+            var min = Math.Min(r, Math.Min(g, b));
+            var delta = max - min;
+
+            float h = 0;
+            if (delta != 0)
+            {
+                if (max == r) h = (g - b) / delta + (g < b ? 6 : 0);
+                else if (max == g) h = (b - r) / delta + 2;
+                else h = (r - g) / delta + 4;
+                h /= 6;
+            }
+
+            var s = (max == 0) ? 0 : (delta / max);
+            var v = max;
+            return CreateHsvShaderMaterial(h, s, v);
+        }
+
         /// <summary>
         ///     Builds a <c>ShaderMaterial</c> using the game's HSV shader with the given parameters.
         /// </summary>
         public static ShaderMaterial CreateHsvShaderMaterial(float h, float s, float v)
         {
-            var shader = GameHsvShader;
-            if (shader == null)
-                throw new InvalidOperationException($"Failed to load HSV shader ({HsvShaderPath}).");
+            var shader = GameHsvShader ?? throw new InvalidOperationException($"Failed to load HSV shader ({HsvShaderPath}).");
 
             var material = new ShaderMaterial
             {