public bool hit(Ray r, float t_min, float t_max, ref HitRecord rec)
{
HitRecord temp_rec = new HitRecord();
bool hit_something = false;
float closest_so_far = t_max;
foreach (Hitable h in this.hitableList)
{
if (h == null)
{
continue;
}
if (h.hit(r, t_min, closest_so_far, ref temp_rec))
{
hit_something = true;
closest_so_far = temp_rec.t;
rec = temp_rec;
}
}
return(hit_something);
}
Vector3 Color(Ray r, HitableList world, int depth)
{
HitRecord rec = new HitRecord();
if (world.hit(r, 0.001f, float.MaxValue, ref rec))
{
Ray scattered = null;
Vector3 attenuation = new Vector3(0, 0, 0);
if (depth < 50 && rec.mat.scatter(r, rec, ref attenuation, ref scattered))
{
return(attenuation * Color(scattered, world, depth + 1));
}
else
{
return(new Vector3(0, 0, 0));
}
}
else
{
Vector3 unitDirection = Vector3.Normalize(r.Direction());
float t = 0.5f * (unitDirection.Y + 1.0f);
return((1.0f - t) * new Vector3(1.0f, 1.0f, 1.0f) + t * new Vector3(0.5f, 0.7f, 1.0f));
}
}