def scatter(self, r_in: Ray, rec: HitRecord) \
-> Optional[Tuple[Ray, Color]]:
reflected: Vec3 = r_in.direction().unit_vector().reflect(rec.normal) \
+ Vec3.random_in_unit_sphere() * self.fuzz
scattered = Ray(rec.p, reflected)
attenuation = self.albedo
if scattered.direction() @ rec.normal > 0:
return scattered, attenuation
return None
def scatter(self, r_in: Ray, rec: HitRecord) \
-> Optional[Tuple[Ray, Color]]:
scattered = Ray(rec.p, Vec3.random_in_unit_sphere(), r_in.time())
attenuation = self.albedo.value(rec.u, rec.v, rec.p)
return scattered, attenuation