WindGrid.cs

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using System;
using Microsoft.Xna.Framework;
 
namespace Terraria.GameContent.Drawing;
 
public class WindGrid
{
    private struct WindCoord
    {
        public int Time;
 
        public int DirectionX;
 
        public int DirectionY;
    }
 
    private WindCoord[,] _grid = new WindCoord[1, 1];
 
    private int _width = 1;
 
    private int _height = 1;
 
    private int _gameTime;
 
    public void SetSize(int targetWidth, int targetHeight)
    {
        _width = Math.Max(_width, targetWidth);
        _height = Math.Max(_height, targetHeight);
        ResizeGrid();
    }
 
    public void Update()
    {
        _gameTime++;
        if (Main.SettingsEnabled_TilesSwayInWind)
        {
            ScanPlayers();
        }
    }
 
    public void GetWindTime(int tileX, int tileY, int timeThreshold, out int windTimeLeft, out int directionX, out int directionY)
    {
        WindCoord windCoord = _grid[tileX % _width, tileY % _height];
        directionX = windCoord.DirectionX;
        directionY = windCoord.DirectionY;
        if (windCoord.Time + timeThreshold < _gameTime)
        {
            windTimeLeft = 0;
        }
        else
        {
            windTimeLeft = _gameTime - windCoord.Time;
        }
    }
 
    private void ResizeGrid()
    {
        if (_width > _grid.GetLength(0) || _height > _grid.GetLength(1))
        {
            _grid = new WindCoord[_width, _height];
        }
    }
 
    private void SetWindTime(int tileX, int tileY, int directionX, int directionY)
    {
        int num = tileX % _width;
        int num2 = tileY % _height;
        _grid[num, num2].Time = _gameTime;
        _grid[num, num2].DirectionX = directionX;
        _grid[num, num2].DirectionY = directionY;
    }
 
    private void ScanPlayers()
    {
        if (Main.netMode == 0)
        {
            ScanPlayer(Main.myPlayer);
        }
        else if (Main.netMode == 1)
        {
            for (int i = 0; i < 255; i++)
            {
                ScanPlayer(i);
            }
        }
    }
 
    private void ScanPlayer(int i)
    {
        Player player = Main.player[i];
        if (!player.active || player.dead || (player.velocity.X == 0f && player.velocity.Y == 0f) || !Utils.CenteredRectangle(Main.Camera.Center, Main.Camera.UnscaledSize).Intersects(player.Hitbox) || player.velocity.HasNaNs())
        {
            return;
        }
        int directionX = Math.Sign(player.velocity.X);
        int directionY = Math.Sign(player.velocity.Y);
        foreach (Point item in Collision.GetTilesIn(player.TopLeft, player.BottomRight))
        {
            SetWindTime(item.X, item.Y, directionX, directionY);
        }
    }
}