Function uniformSampleCone

tutorials/common/math/sampling.h:103–108

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inline Vec3fa uniformSampleCone(const float cosAngle, const Vec2f &s)
{
  const float phi =float(two_pi) * s.x;
  const float cosTheta = 1.0f - s.y * (1.0f - cosAngle);
  return cartesian(phi, cosTheta);
}

inline float uniformSampleConePDF(const float cosAngle)
{