CavernShader.cs

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using System;
using Microsoft.Xna.Framework;
using ReLogic.Peripherals.RGB;
 
namespace Terraria.GameContent.RGB;
 
public class CavernShader : ChromaShader
{
    private readonly Vector4 _backColor;
 
    private readonly Vector4 _frontColor;
 
    private readonly float _speed;
 
    public CavernShader(Color backColor, Color frontColor, float speed)
    {
        _backColor = backColor.ToVector4();
        _frontColor = frontColor.ToVector4();
        _speed = speed;
    }
 
    [RgbProcessor(/*Could not decode attribute arguments.*/)]
    private void ProcessLowDetail(RgbDevice device, Fragment fragment, EffectDetailLevel quality, float time)
    {
        for (int i = 0; i < fragment.Count; i++)
        {
            Vector2 canvasPositionOfIndex = fragment.GetCanvasPositionOfIndex(i);
            Vector4 vector = Vector4.Lerp(_backColor, _frontColor, (float)Math.Sin(time * _speed + canvasPositionOfIndex.X) * 0.5f + 0.5f);
            fragment.SetColor(i, vector);
        }
    }
 
    [RgbProcessor(/*Could not decode attribute arguments.*/)]
    private void ProcessHighDetail(RgbDevice device, Fragment fragment, EffectDetailLevel quality, float time)
    {
        time *= _speed * 0.5f;
        float num = time % 1f;
        bool num2 = time % 2f > 1f;
        Vector4 vector = (num2 ? _frontColor : _backColor);
        Vector4 value = (num2 ? _backColor : _frontColor);
        num *= 1.2f;
        for (int i = 0; i < fragment.Count; i++)
        {
            float staticNoise = NoiseHelper.GetStaticNoise(fragment.GetCanvasPositionOfIndex(i) * 0.5f + new Vector2(0f, time * 0.5f));
            Vector4 vector2 = vector;
            staticNoise += num;
            if (staticNoise > 0.999f)
            {
                float amount = MathHelper.Clamp((staticNoise - 0.999f) / 0.2f, 0f, 1f);
                vector2 = Vector4.Lerp(vector2, value, amount);
            }
            fragment.SetColor(i, vector2);
        }
    }
}