namespace xppc{
  float xrnd();
  float grnd();

  void start();
  void stop();
  void choose(int);
  void ini(int);
  void fin();
  void eout();

  void flini(int, int);
  void flone(unsigned long long);

  struct mcid:std::pair<int,unsigned long long>{
    int frame;
  };

  struct DOM{
    float r[3];
  };

  struct ikey{
    int str, dom;
  };

  struct OM:DOM,ikey{};
  extern std::vector<OM> i3oms;
  void initialize();
  void igeo(float);

  struct ihit{
    ikey omkey;
    mcid track;
    float time;
  };

  extern std::vector<ihit> hitz;

  void eini();
  void efin();

  void sett(float, float, float, std::pair<int,unsigned long long>, int);
  template <class T> void addp(float, float, float, float, float, T);
}