Function Lambertian__eval

tutorials/pathtracer/pathtracer_device.cpp:289–293

};

inline Vec3fa Lambertian__eval(const Lambertian* This,
                              const Vec3fa &wo, const DifferentialGeometry &dg, const Vec3fa &wi)
{
  return This->R * (1.0f/(float)(float(M_PI))) * clamp(dot(wi,dg.Ns));
}

inline Vec3fa Lambertian__sample(const Lambertian* This,
                                const Vec3fa &wo,