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HepMCNodeReader.h
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1 // Tell emacs that this is a C++ source
2 // -*- C++ -*-.
3 #ifndef G4MAIN_HEPMCNODEREADER_H
4 #define G4MAIN_HEPMCNODEREADER_H
5 
6 #include <fun4all/SubsysReco.h>
7 
8 // rootcint barfs with this header so we need to hide it
9 #include <gsl/gsl_rng.h>
10 
11 #include <string>
12 
13 class PHCompositeNode;
14 
17 class HepMCNodeReader : public SubsysReco
18 {
19  public:
20  HepMCNodeReader(const std::string &name = "HEPMCREADER");
21  ~HepMCNodeReader() override;
22 
23  int Init(PHCompositeNode *topNode) override;
24  int process_event(PHCompositeNode *topNode) override;
25 
26  void pythia(const bool pythia)
27  { is_pythia = pythia; }
28 
31  void Embed(const int i = 1);
32 
36  void VertexPosition(const double v_x, const double v_y, const double v_z);
37 
42  void SmearVertex(const double s_x, const double s_y, const double s_z);
43 
46  void SetT0(const double t0) { vertex_t0 = t0; }
47  //
49  void SetSeed(const unsigned int i)
50  {
51  seed = i;
52  use_seed = 1;
53  }
54 
55  private:
56  double smeargauss(const double width);
57  double smearflat(const double width);
58 
59  gsl_rng *RandomGenerator;
60  bool is_pythia;
61  int use_seed;
62  unsigned int seed;
63  double vertex_pos_x;
64  double vertex_pos_y;
65  double vertex_pos_z;
66  double vertex_t0;
67  double width_vx;
68  double width_vy;
69  double width_vz;
70 };
71 
72 #endif