Function sample_component2

tutorials/pathtracer/pathtracer_device.cpp:131–157

}

inline Vec3fa sample_component2(const Vec3fa& c0, const Sample3f& wi0, const Medium& medium0,
                               const Vec3fa& c1, const Sample3f& wi1, const Medium& medium1,
                               const Vec3fa& Lw, Sample3f& wi_o, Medium& medium_o, const float s)
{
  const Vec3fa m0 = Lw*c0/wi0.pdf;
  const Vec3fa m1 = Lw*c1/wi1.pdf;

  const float C0 = wi0.pdf == 0.0f ? 0.0f : max(max(m0.x,m0.y),m0.z);
  const float C1 = wi1.pdf == 0.0f ? 0.0f : max(max(m1.x,m1.y),m1.z);
  const float C  = C0 + C1;

  if (C == 0.0f) {
    wi_o = make_Sample3f(Vec3fa(0,0,0),0);
    return Vec3fa(0,0,0);
  }

  const float CP0 = C0/C;
  const float CP1 = C1/C;
  if (s < CP0) {
    wi_o = make_Sample3f(wi0.v,wi0.pdf*CP0);
    medium_o = medium0; return c0;
  }
  else {
    wi_o = make_Sample3f(wi1.v,wi1.pdf*CP1);
    medium_o = medium1; return c1;
  }
}

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//                          Minneart BRDF                                     //