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PHG4GenHit.cc
Go to the documentation of this file. Or view the newest version in sPHENIX GitHub for file PHG4GenHit.cc
1 #include "PHG4GenHit.h"
2 #include "PHG4CylinderGeomContainer.h"
3 #include "PHG4CylinderGeom.h"
4 
5 #include <g4main/PHG4HitContainer.h>
6 #include <g4main/PHG4Hit.h>
7 #include <g4main/PHG4Hitv1.h>
8 
9 #include <fun4all/Fun4AllReturnCodes.h>
10 #include <fun4all/SubsysReco.h> // for SubsysReco
11 
12 #include <phool/getClass.h>
13 
14 #include <cmath>
15 #include <iostream> // for operator<<, basic_ostream
16 
17 class PHCompositeNode;
18 
19 using namespace std;
20 
21 PHG4GenHit::PHG4GenHit(const string &name):
22  SubsysReco(name),
23  phi(NAN),
24  theta(NAN),
25  eloss(NAN),
26  layer(-9999)
27 {}
28 
29 int
30 PHG4GenHit::process_event(PHCompositeNode *topNode)
31 {
32  string hitnodename = "G4HIT_" + detector;
33  string geonodename = "CYLINDERGEOM_" + detector;
34  PHG4CylinderGeomContainer *geo = findNode::getClass<PHG4CylinderGeomContainer>(topNode , geonodename.c_str());
35  if (! geo)
36  {
37  cout << "cannot find geo node " << geonodename << endl;
38  return Fun4AllReturnCodes::EVENT_OK;
39  }
40  PHG4HitContainer *hits_ = findNode::getClass<PHG4HitContainer>( topNode , hitnodename.c_str());
41  if (! hits_)
42  {
43  cout << "cannot find hit node " << hitnodename << endl;
44  return Fun4AllReturnCodes::EVENT_OK;
45  }
46  PHG4CylinderGeom *mygeom = geo->GetLayerGeom(layer);
47  double inner_radius = mygeom->get_radius();
48  double outer_radius = inner_radius + mygeom->get_thickness();
49  PHG4Hit *hit = new PHG4Hitv1();
50  hit->set_layer((unsigned int)layer);
51  double x0 = inner_radius * cos(phi * M_PI / 180.);
52  double y0 = inner_radius * sin(phi * M_PI / 180.);
53  double z0 = inner_radius * cos(theta * M_PI / 180.);
54  double x1 = outer_radius * cos(phi * M_PI / 180.);
55  double y1 = outer_radius * sin(phi * M_PI / 180.);
56  double z1 = outer_radius * cos(theta * M_PI / 180.);
57  hit->set_x(0, x0);
58  hit->set_y(0, y0);
59  hit->set_z(0, z0);
60  hit->set_x(1, x1);
61  hit->set_y(1, y1);
62  hit->set_z(1, z1);
63  hit->set_edep(eloss);
64  hit->set_trkid(-1);
65  hits_->AddHit(layer, hit);
66  if (Verbosity() > 0)
67  {
68  cout << "phi " << phi << " inner rad: " << inner_radius
69  << ", outer rad: " << outer_radius
70  << " x0/y0/z0: " << x0 << "/" << y0 << "/" << z0
71  << " x1/y1/z1: " << x1 << "/" << y1 << "/" << z1
72  << " edep: " << eloss
73  << endl;
74  }
75  return Fun4AllReturnCodes::EVENT_OK;
76 }