Method filter

LASlib/src/lasfilter.cpp:1746–1751

  inline const CHAR* name() const { return "keep_random_fraction"; };
  inline I32 get_command(CHAR* string) const { return sprintf(string, "-%s %g ", name(), fraction); };
  inline BOOL filter(const LASpoint* point)
  {
    srand(seed);
    seed = rand();
    return ((F32)seed / (F32)RAND_MAX) > fraction;
  };
  void reset() { seed = requested_seed; };
  LAScriterionKeepRandomFraction(F32 fraction) { requested_seed = seed = 0; this->fraction = fraction; };
  LAScriterionKeepRandomFraction(U32 seed, F32 fraction) { requested_seed = this->seed = seed; this->fraction = fraction; };