public override bool Hit(Ray ray, double t_min, double t_max, ref ShadeRec sr)
{
if (!hitable.Hit(ray, t_min, t_max, ref sr))
{
return(false);
}
sr.normal = -sr.normal;
return(true);
}
public override bool Hit(Ray ray, double t_min, double t_max, ref ShadeRec sr)
{
Ray moved = new Ray(ray.original - offset, ray.direction, ray.time);
if (!Object.Hit(moved, t_min, t_max, ref sr))
{
return(false);
}
sr.p += offset;
return(true);
}
public override bool Hit(Ray ray, double t_min, double t_max, ref ShadeRec sr)
{
ShadeRec temp_record = new ShadeRec();
bool hit_anything = false;
double closest = t_max;
foreach (Hitable h in list)
{
if (!h.Hit(ray, t_min, closest, ref temp_record))
{
continue;
}
hit_anything = true;
closest = temp_record.t;
sr = temp_record;
}
return(hit_anything);
}
public override bool Hit(Ray ray, double t_min, double t_max, ref ShadeRec sr)
{
ShadeRec sr1 = new ShadeRec(), sr2 = new ShadeRec();
if (boundary.Hit(ray, -double.MaxValue, double.MaxValue, ref sr1))
{
if (boundary.Hit(ray, sr1.t + 0.0001, double.MaxValue, ref sr2))
{
sr1.t = Mathf.Range(sr1.t, t_min, t_max);
if (sr1.t < t_min)
{
sr1.t = t_min;
}
if (sr2.t > t_max)
{
sr2.t = t_max;
}
if (sr1.t >= sr2.t)
{
return(false);
}
if (sr1.t < 0)
{
sr1.t = 0;
}
double distance_inside_boundary = (sr2.t - sr1.t) * ray.direction.Magnitude();
double hit_distance = -(1 / density) * Math.Log(Mathematics.Random.Get());
if (hit_distance < distance_inside_boundary)
{
sr.t = sr1.t + hit_distance / ray.direction.Magnitude();
sr.p = ray.GetPoint(sr.t);
sr.normal = new Vector3D(1, 0, 0);
sr.material = phase_function;
return(true);
}
}
}
return(false);
}
public abstract bool Hit(Ray ray, double t_min, double t_max, ref ShadeRec sr);
