public bool Hit(Ray ray, ref float t_min, ref float t_max, out Hit_record record)
{
record = new Hit_record();
Vector3 oc = ray.origin - center;
float a = Vector3.Dot(ray.direction, ray.direction);
float b = Vector3.Dot(oc, ray.direction);
float c = Vector3.Dot(oc, oc) - radius * radius;
float d = b * b - a * c;
if (d > 0)
{
float temp = (-b - Mathf.Sqrt(d)) / a;
if (temp < t_max && temp > t_min)
{
record.t = temp;
record.hitpoint = ray.GetPoint(temp);
record.normal = (record.hitpoint - center) / radius;
record.mat = mat;
return(true);
}
temp = (-b + Mathf.Sqrt(d)) / a;
if (temp < t_max && temp > t_min)
{
record.t = temp;
record.hitpoint = ray.GetPoint(temp);
record.normal = (record.hitpoint - center) / radius;
record.mat = mat;
return(true);
}
}
return(false);
}
public bool Scatter(ref Ray r, ref Hit_record rec, ref Vector3 attenuation, ref Ray scattered)
{
Vector3 reflected = Vector3.Reflect(r.direction.normalized, rec.normal.normalized);
scattered.origin = rec.hitpoint;
scattered.direction = reflected;
attenuation = albedo;
return(Vector3.Dot(scattered.direction, rec.normal) > 0);
}
public bool Scatter(ref Ray r, ref Hit_record rec, ref Vector3 attenuation, ref Ray scattered)
{
Vector3 target = rec.normal.normalized +
new Vector3(Random.Range(-1, 1f), Random.Range(-1f, 1f), Random.Range(-1f, 1f)).normalized;
scattered.origin = rec.hitpoint;
scattered.direction = target;
attenuation = albedo * reflect;
return(true);
}
public bool Hit(Ray r, ref float t_min, ref float t_max, out Hit_record record)
{
Hit_record temp_rec = new Hit_record();
record = temp_rec;
bool hit_anything = false;
float closest_so_far = t_max;
for (int i = 0; i < list.Count; ++i)
{
if (list[i].Hit(r, ref t_min, ref closest_so_far, out temp_rec))
{
hit_anything = true;
closest_so_far = temp_rec.t;
record = temp_rec;
}
}
return(hit_anything);
}
