AdventOfCode23/Day17/Vec.cs

namespace Day17;

public record struct Vec
{
    public int X { get; }
    public int Y { get; }

    public Vec(int x, int y)
    {
        X = x;
        Y = y;
    }

    public Vec RotatePositive()
    {
        // clockwise
        return new Vec(-1 * Y, X);
    }
    
    public Vec RotateNegative()
    {
        // counter-clockwise
        return new Vec(Y, -1 * X);
    }

    public Vec Add(Vec other)
    {
        return new Vec(X + other.X, Y + other.Y);
    }

    public char Arrow()
    {
        if (Y == 0)
        {
            return X > 0
                ? '>'
                : '<';
        }
        else
        {
            return Y > 0
                ? 'v'
                : '^';
        }
    }
}