DD2Shader.cs

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using Microsoft.Xna.Framework;
using ReLogic.Peripherals.RGB;
 
namespace Terraria.GameContent.RGB;
 
public class DD2Shader : ChromaShader
{
    private readonly Vector4 _darkGlowColor;
 
    private readonly Vector4 _lightGlowColor;
 
    public DD2Shader(Color darkGlowColor, Color lightGlowColor)
    {
        _darkGlowColor = darkGlowColor.ToVector4();
        _lightGlowColor = lightGlowColor.ToVector4();
    }
 
    [RgbProcessor(/*Could not decode attribute arguments.*/)]
    private void ProcessHighDetail(RgbDevice device, Fragment fragment, EffectDetailLevel quality, float time)
    {
        //IL_0007: Unknown result type (might be due to invalid IL or missing references)
        Vector2 vector = fragment.CanvasCenter;
        if ((int)quality == 0)
        {
            vector = new Vector2(1.7f, 0.5f);
        }
        time *= 0.5f;
        for (int i = 0; i < fragment.Count; i++)
        {
            Vector2 canvasPositionOfIndex = fragment.GetCanvasPositionOfIndex(i);
            Vector4 value = new Vector4(0f, 0f, 0f, 1f);
            float num = (canvasPositionOfIndex - vector).Length();
            float num2 = num * num * 0.75f;
            float num3 = (num - time) % 1f;
            if (num3 < 0f)
            {
                num3 += 1f;
            }
            num3 = ((!(num3 > 0.8f)) ? (num3 / 0.8f) : (num3 * (1f - (num3 - 1f + 0.2f) / 0.2f)));
            Vector4 value2 = Vector4.Lerp(_darkGlowColor, _lightGlowColor, num3 * num3);
            num3 *= MathHelper.Clamp(1f - num2, 0f, 1f) * 0.75f + 0.25f;
            value = Vector4.Lerp(value, value2, num3);
            if (num < 0.5f)
            {
                float amount = 1f - MathHelper.Clamp((num - 0.5f + 0.4f) / 0.4f, 0f, 1f);
                value = Vector4.Lerp(value, _lightGlowColor, amount);
            }
            fragment.SetColor(i, value);
        }
    }
}