using System.Numerics;
using System.Runtime.CompilerServices;

readonly struct Ray
{
    public readonly Vector3 Origin;
    public readonly Vector3 Direction;

    public Ray(Vector3 origin, Vector3 direction)
    {
        Origin = origin;
        Direction = direction;
    }
}

class RayTracer
{
    private static IEnumerable<object> hittables;
    
    static RayTracer()
    {
        var list = new List<object>();
        list.Add(new object());
        hittables = list;
    }

    public static void Main(string[] args)
    {
        for (int x = 0; x < 100*100*100; x++)
        {
            Ray r = GetRay();
            System.Console.WriteLine(r.Direction);
            traceRay(r); 
        }
    }

    public static Ray GetRay()
    {
        return new Ray(Vector3.Zero, -Vector3.UnitY);
    }

    private static Vector3 traceRay(Ray r)
    {
        foreach (object h in hittables) {
            TestHit(r);
            return Vector3.One;
        }
        return Vector3.Zero;
    }

    [MethodImpl(MethodImplOptions.NoInlining)]
    public static void TestHit(Ray ray)
    {
        return;
    }
}