ScreenDarkness.cs

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using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
 
namespace Terraria.GameContent.Events;
 
public class ScreenDarkness
{
    public static float screenObstruction;
 
    public static Color frontColor = new Color(0, 0, 120);
 
    public static void Update()
    {
        float value = 0f;
        float amount = 1f / 60f;
        Vector2 mountedCenter = Main.player[Main.myPlayer].MountedCenter;
        for (int i = 0; i < 200; i++)
        {
            if (Main.npc[i].active && Main.npc[i].type == 370 && Main.npc[i].Distance(mountedCenter) < 3000f && (Main.npc[i].ai[0] >= 10f || (Main.npc[i].ai[0] == 9f && Main.npc[i].ai[2] > 120f)))
            {
                value = 0.95f;
                frontColor = new Color(0, 0, 120) * 0.3f;
                amount = 0.03f;
            }
            if (Main.npc[i].active && Main.npc[i].type == 113 && Main.npc[i].Distance(mountedCenter) < 3000f)
            {
                float num = Utils.Remap(Main.npc[i].Distance(mountedCenter), 2000f, 3000f, 1f, 0f);
                value = Main.npc[i].localAI[1] * num;
                amount = 1f;
                frontColor = Color.Black;
            }
        }
        screenObstruction = MathHelper.Lerp(screenObstruction, value, amount);
    }
 
    public static void DrawBack(SpriteBatch spriteBatch)
    {
        if (screenObstruction != 0f)
        {
            Color color = Color.Black * screenObstruction;
            spriteBatch.Draw(TextureAssets.MagicPixel.Value, new Rectangle(-2, -2, Main.screenWidth + 4, Main.screenHeight + 4), new Rectangle(0, 0, 1, 1), color);
        }
    }
 
    public static void DrawFront(SpriteBatch spriteBatch)
    {
        if (screenObstruction != 0f)
        {
            Color color = frontColor * screenObstruction;
            spriteBatch.Draw(TextureAssets.MagicPixel.Value, new Rectangle(-2, -2, Main.screenWidth + 4, Main.screenHeight + 4), new Rectangle(0, 0, 1, 1), color);
        }
    }
}