WormShader.cs

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using System;
using Microsoft.Xna.Framework;
using ReLogic.Peripherals.RGB;
 
namespace Terraria.GameContent.RGB;
 
public class WormShader : ChromaShader
{
    private readonly Vector4 _skinColor;
 
    private readonly Vector4 _eyeColor;
 
    private readonly Vector4 _innerEyeColor;
 
    public WormShader()
    {
    }
 
    public WormShader(Color skinColor, Color eyeColor, Color innerEyeColor)
    {
        _skinColor = skinColor.ToVector4();
        _eyeColor = eyeColor.ToVector4();
        _innerEyeColor = innerEyeColor.ToVector4();
    }
 
    [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++)
        {
            float amount = Math.Max(0f, (float)Math.Sin(time * -3f + fragment.GetCanvasPositionOfIndex(i).X));
            Vector4 vector = Vector4.Lerp(_skinColor, _eyeColor, amount);
            fragment.SetColor(i, vector);
        }
    }
 
    [RgbProcessor(/*Could not decode attribute arguments.*/)]
    private void ProcessHighDetail(RgbDevice device, Fragment fragment, EffectDetailLevel quality, float time)
    {
        time *= 0.25f;
        for (int i = 0; i < fragment.Count; i++)
        {
            Vector2 canvasPositionOfIndex = fragment.GetCanvasPositionOfIndex(i);
            canvasPositionOfIndex.X -= time * 1.5f;
            canvasPositionOfIndex.X %= 2f;
            if (canvasPositionOfIndex.X < 0f)
            {
                canvasPositionOfIndex.X += 2f;
            }
            float num = (canvasPositionOfIndex - new Vector2(0.5f)).Length();
            Vector4 vector = _skinColor;
            if (num < 0.5f)
            {
                float num2 = MathHelper.Clamp((num - 0.5f + 0.2f) / 0.2f, 0f, 1f);
                vector = Vector4.Lerp(vector, _eyeColor, 1f - num2);
                if (num < 0.4f)
                {
                    num2 = MathHelper.Clamp((num - 0.4f + 0.2f) / 0.2f, 0f, 1f);
                    vector = Vector4.Lerp(vector, _innerEyeColor, 1f - num2);
                }
            }
            fragment.SetColor(i, vector);
        }
    }
}