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PHG4InEventReadBack.cc
Go to the documentation of this file. Or view the newest version in sPHENIX GitHub for file PHG4InEventReadBack.cc
1 #include "PHG4InEventReadBack.h"
2 #include "PHG4InEvent.h"
3 #include "PHG4Particle.h" // for PHG4Particle
4 #include "PHG4Particlev1.h"
5 #include "PHG4VtxPointv1.h"
6 
7 #include <vararray/VariableArray.h>
8 #include <vararray/VariableArrayUtils.h>
9 
10 #include <fun4all/Fun4AllReturnCodes.h>
11 
12 #include <phool/getClass.h>
13 #include <phool/PHCompositeNode.h>
14 #include <phool/PHIODataNode.h>
15 #include <phool/PHNode.h> // for PHNode
16 #include <phool/PHNodeIterator.h> // for PHNodeIterator
17 #include <phool/PHObject.h> // for PHObject
18 
19 #include <iostream>
20 
21 using namespace std;
22 
23 PHG4InEventReadBack::PHG4InEventReadBack(const std::string &name): SubsysReco(name)
24 {}
25 
26 int
27 PHG4InEventReadBack::InitRun(PHCompositeNode *topNode)
28 {
29  PHG4InEvent *ineve = findNode::getClass<PHG4InEvent>(topNode,"PHG4INEVENT");
30  if (!ineve)
31  {
32  PHNodeIterator iter( topNode );
33  PHCompositeNode *dstNode;
34  dstNode = dynamic_cast<PHCompositeNode*>(iter.findFirst("PHCompositeNode", "DST" ));
35 
36  ineve = new PHG4InEvent();
37  PHIODataNode<PHObject> *newNode = new PHIODataNode<PHObject>(ineve, "PHG4INEVENT", "PHObject");
38  dstNode->addNode(newNode);
39  }
40 
41  return Fun4AllReturnCodes::EVENT_OK;
42 }
43 
44 int
45 PHG4InEventReadBack::process_event(PHCompositeNode *topNode)
46 {
47  PHG4InEvent *inEvent = findNode::getClass<PHG4InEvent>(topNode,"PHG4INEVENT");
48  if (!inEvent)
49  {
50  cout << "no PHG4INEVENT node found" << endl;
51  return Fun4AllReturnCodes::EVENT_OK;
52  }
53  VariableArray *vtxarray = findNode::getClass<VariableArray>(topNode,"PHG4Vtx_VarArray");
54  if (!vtxarray)
55  {
56  cout << "no PHG4Vtx_VarArray node found" << endl;
57  return Fun4AllReturnCodes::EVENT_OK;
58  }
59 
60  VariableArray *particlearray = findNode::getClass<VariableArray>(topNode,"PHG4Particle_VarArray");
61  if (!particlearray)
62  {
63  cout << "no PHG4Particle_VarArray node found" << endl;
64  return Fun4AllReturnCodes::EVENT_OK;
65  }
66  inEvent->Reset();
67  unsigned int size = vtxarray->get_array_size();
68  const short int *sval = vtxarray->get_array();
69  PHG4VtxPointv1 vtx;
70  while(size > 0)
71  {
72  int vtxid = *sval++;
73  size --;
74  vtx.set_x(VariableArrayUtils::ShortBitsToFloat(*sval++));
75  size --;
76  vtx.set_y(VariableArrayUtils::ShortBitsToFloat(*sval++));
77  size --;
78  vtx.set_z(VariableArrayUtils::ShortBitsToFloat(*sval++));
79  size--;
80  vtx.set_t(VariableArrayUtils::ShortBitsToFloat(*sval++));
81  size--;
82  inEvent->AddVtx(vtxid,vtx);
83  }
84 
85  size = particlearray->get_array_size();
86  sval = particlearray->get_array();
87  while(size > 0)
88  {
89  PHG4Particle *particle = new PHG4Particlev1();
90  int vtxid = *sval++;
91  size --;
92  particle->set_pid(*sval++);
93  size --;
94  particle->set_px(VariableArrayUtils::ShortBitsToFloat(*sval++));
95  size --;
96  particle->set_py(VariableArrayUtils::ShortBitsToFloat(*sval++));
97  size --;
98  particle->set_pz(VariableArrayUtils::ShortBitsToFloat(*sval++));
99  size --;
100  inEvent->AddParticle(vtxid, particle);
101  }
102  // inEvent->identify();
103  return Fun4AllReturnCodes::EVENT_OK;
104 }
105 
106 int
107 PHG4InEventReadBack::End(PHCompositeNode */*topNode*/)
108 {
109  return Fun4AllReturnCodes::EVENT_OK;
110 }