EmpressShader.cs

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using System;
using Microsoft.Xna.Framework;
using ReLogic.Peripherals.RGB;
 
namespace Terraria.GameContent.RGB;
 
public class EmpressShader : ChromaShader
{
    private static readonly Vector4[] _colors = new Vector4[12]
    {
        new Vector4(1f, 0.1f, 0.1f, 1f),
        new Vector4(1f, 0.5f, 0.1f, 1f),
        new Vector4(1f, 1f, 0.1f, 1f),
        new Vector4(0.5f, 1f, 0.1f, 1f),
        new Vector4(0.1f, 1f, 0.1f, 1f),
        new Vector4(0.1f, 1f, 0.5f, 1f),
        new Vector4(0.1f, 1f, 1f, 1f),
        new Vector4(0.1f, 0.5f, 1f, 1f),
        new Vector4(0.1f, 0.1f, 1f, 1f),
        new Vector4(0.5f, 0.1f, 1f, 1f),
        new Vector4(1f, 0.1f, 1f, 1f),
        new Vector4(1f, 0.1f, 0.5f, 1f)
    };
 
    [RgbProcessor(/*Could not decode attribute arguments.*/)]
    private void ProcessHighDetail(RgbDevice device, Fragment fragment, EffectDetailLevel quality, float time)
    {
        float num = time * 2f;
        for (int i = 0; i < fragment.Count; i++)
        {
            Point gridPositionOfIndex = fragment.GetGridPositionOfIndex(i);
            Vector2 canvasPositionOfIndex = fragment.GetCanvasPositionOfIndex(i);
            float staticNoise = NoiseHelper.GetStaticNoise(gridPositionOfIndex.X);
            float num2 = MathHelper.Max(0f, (float)Math.Cos((staticNoise + num) * ((float)Math.PI * 2f) * 0.2f));
            Vector4 value = Color.Lerp(Color.Black, Color.Indigo, 0.5f).ToVector4();
            float num3 = Math.Max(0f, (float)Math.Sin(Main.GlobalTimeWrappedHourly * 2f + canvasPositionOfIndex.X * 1f));
            num3 = 0f;
            value = Vector4.Lerp(value, new Vector4(1f, 0.1f, 0.1f, 1f), num3);
            float num4 = (num2 + canvasPositionOfIndex.X + canvasPositionOfIndex.Y) % 1f;
            if (num4 > 0f)
            {
                int num5 = (gridPositionOfIndex.X + gridPositionOfIndex.Y) % _colors.Length;
                if (num5 < 0)
                {
                    num5 += _colors.Length;
                }
                Vector4 value2 = Main.hslToRgb(((canvasPositionOfIndex.X + canvasPositionOfIndex.Y) * 0.15f + time * 0.1f) % 1f, 1f, 0.5f).ToVector4();
                value = Vector4.Lerp(value, value2, num4);
            }
            fragment.SetColor(i, value);
        }
    }
 
    private static void RedsVersion(Fragment fragment, float time)
    {
        time *= 3f;
        for (int i = 0; i < fragment.Count; i++)
        {
            Point gridPositionOfIndex = fragment.GetGridPositionOfIndex(i);
            Vector2 canvasPositionOfIndex = fragment.GetCanvasPositionOfIndex(i);
            float num = (NoiseHelper.GetStaticNoise(gridPositionOfIndex.X) * 7f + time * 0.4f) % 7f - canvasPositionOfIndex.Y;
            Vector4 vector = default(Vector4);
            if (num > 0f)
            {
                float amount = Math.Max(0f, 1.4f - num);
                if (num < 0.4f)
                {
                    amount = num / 0.4f;
                }
                int num2 = (gridPositionOfIndex.X + _colors.Length + (int)(time / 6f)) % _colors.Length;
                vector = Vector4.Lerp(vector, _colors[num2], amount);
            }
            fragment.SetColor(i, vector);
        }
    }
}