SandstormSky.cs

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using System;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
using Terraria.GameContent.Events;
using Terraria.Graphics.Effects;
using Terraria.Utilities;
 
namespace Terraria.GameContent.Skies;
 
public class SandstormSky : CustomSky
{
    private UnifiedRandom _random = new UnifiedRandom();
 
    private bool _isActive;
 
    private bool _isLeaving;
 
    private float _opacity;
 
    public override void OnLoad()
    {
    }
 
    public override void Update(GameTime gameTime)
    {
        if (Main.gamePaused || !Main.hasFocus)
        {
            return;
        }
        if (_isLeaving)
        {
            _opacity -= (float)gameTime.ElapsedGameTime.TotalSeconds;
            if (_opacity < 0f)
            {
                _isActive = false;
                _opacity = 0f;
            }
        }
        else
        {
            _opacity += (float)gameTime.ElapsedGameTime.TotalSeconds;
            if (_opacity > 1f)
            {
                _opacity = 1f;
            }
        }
    }
 
    public override void Draw(SpriteBatch spriteBatch, float minDepth, float maxDepth)
    {
        if (minDepth < 1f || maxDepth == float.MaxValue)
        {
            float num = Math.Min(1f, Sandstorm.Severity * 1.5f);
            Color color = new Color(new Vector4(0.85f, 0.66f, 0.33f, 1f) * 0.8f * Main.ColorOfTheSkies.ToVector4()) * _opacity * num;
            spriteBatch.Draw(TextureAssets.MagicPixel.Value, new Rectangle(0, 0, Main.screenWidth, Main.screenHeight), color);
        }
    }
 
    public override void Activate(Vector2 position, params object[] args)
    {
        _isActive = true;
        _isLeaving = false;
    }
 
    public override void Deactivate(params object[] args)
    {
        _isLeaving = true;
    }
 
    public override void Reset()
    {
        _opacity = 0f;
        _isActive = false;
    }
 
    public override bool IsActive()
    {
        return _isActive;
    }
}