Function MetalMaterial__sample

tutorials/pathtracer/pathtracer_device.cpp:661–669

}

Vec3fa MetalMaterial__sample(ISPCMetalMaterial* This, const BRDF& brdf, const Vec3fa& Lw, const Vec3fa& wo, const DifferentialGeometry& dg, Sample3f& wi_o, Medium& medium, const Vec2f& s)
{
  const PowerCosineDistribution distribution = make_PowerCosineDistribution(rcp(This->roughness));

  if (dot(wo,dg.Ns) <= 0.0f) { wi_o = make_Sample3f(Vec3fa(0.0f),0.0f); return Vec3fa(0.f); }
  sample(distribution,wo,dg.Ns,wi_o,s);
  if (dot(wi_o.v,dg.Ns) <= 0.0f) { wi_o = make_Sample3f(Vec3fa(0.0f),0.0f); return Vec3fa(0.f); }
  return MetalMaterial__eval(This,brdf,wo,dg,wi_o.v);
}

////////////////////////////////////////////////////////////////////////////////
//                        ReflectiveMetal Material                            //