BlizzardShader.cs

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using Microsoft.Xna.Framework;
using ReLogic.Peripherals.RGB;
 
namespace Terraria.GameContent.RGB;
 
public class BlizzardShader : ChromaShader
{
    private readonly Vector4 _backColor = new Vector4(0.1f, 0.1f, 0.3f, 1f);
 
    private readonly Vector4 _frontColor = new Vector4(1f, 1f, 1f, 1f);
 
    private readonly float _timeScaleX;
 
    private readonly float _timeScaleY;
 
    public BlizzardShader(Vector4 frontColor, Vector4 backColor, float panSpeedX, float panSpeedY)
    {
        _frontColor = frontColor;
        _backColor = backColor;
        _timeScaleX = panSpeedX;
        _timeScaleY = panSpeedY;
    }
 
    [RgbProcessor(/*Could not decode attribute arguments.*/)]
    private void ProcessHighDetail(RgbDevice device, Fragment fragment, EffectDetailLevel quality, float time)
    {
        //IL_0000: Unknown result type (might be due to invalid IL or missing references)
        if ((int)quality == 0)
        {
            time *= 0.25f;
        }
        for (int i = 0; i < fragment.Count; i++)
        {
            float staticNoise = NoiseHelper.GetStaticNoise(fragment.GetCanvasPositionOfIndex(i) * new Vector2(0.2f, 0.4f) + new Vector2(time * _timeScaleX, time * _timeScaleY));
            Vector4 vector = Vector4.Lerp(_backColor, _frontColor, staticNoise * staticNoise);
            fragment.SetColor(i, vector);
        }
    }
}