AdventOfCode23/Day18/CellData.cs

namespace Day18;

public class CellData
{
    public Vec TopLeft { get; }
    public Vec BottomRight { get; }
    public List<Line>? Lines { get; set; }
    public bool HasCrossing { get; private set; }

    public CellData(Vec tl, Vec br)
    {
        TopLeft = tl;
        BottomRight = br;
    }

    public long Size()
    {
        return (BottomRight.X - TopLeft.X) * (BottomRight.Y - TopLeft.Y);
    }

    public void Calculate()
    {
        foreach (var l in Lines!)
        {
            if (l.Dir.IsVertical && l.Start.X == TopLeft.X)
            {
                var start = Math.Min(l.Start.Y, l.Start.Y + l.Length * l.Dir.Y);
                var end = Math.Max(l.Start.Y, l.Start.Y + l.Length * l.Dir.Y);

                if (start <= TopLeft.Y && end >= TopLeft.Y && start <= BottomRight.Y && end >= BottomRight.Y)
                {
                    HasCrossing = true;
                    break;
                }
            }
        }
    }
}