Function powerCosineSampleHemisphere

tutorials/common/math/sampling.h:83–88

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inline Vec3fa powerCosineSampleHemisphere(const float n, const Vec2f &s)
{
  const float phi =float(two_pi) * s.x;
  const float cosTheta = pow(s.y, 1.0f / (n + 1.0f));
  return cartesian(phi, cosTheta);
}

inline float powerCosineSampleHemispherePDF(const float cosTheta, const float n) // TODO: order of arguments
{