BloodMoonScreenShaderData.cs

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using Microsoft.Xna.Framework;
using Terraria.Graphics.Shaders;
 
namespace Terraria.GameContent.Shaders;
 
public class BloodMoonScreenShaderData : ScreenShaderData
{
    public BloodMoonScreenShaderData(string passName)
        : base(passName)
    {
    }
 
    public override void Update(GameTime gameTime)
    {
        float num = 1f - Utils.SmoothStep((float)Main.worldSurface + 50f, (float)Main.rockLayer + 100f, (Main.screenPosition.Y + (float)(Main.screenHeight / 2)) / 16f);
        if (Main.remixWorld)
        {
            num = Utils.SmoothStep((float)(Main.rockLayer + Main.worldSurface) / 2f, (float)Main.rockLayer, (Main.screenPosition.Y + (float)(Main.screenHeight / 2)) / 16f);
        }
        if (Main.shimmerAlpha > 0f)
        {
            num *= 1f - Main.shimmerAlpha;
        }
        UseOpacity(num * 0.75f);
    }
}