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source: git/classes/DelphesLHEFReader.cc @ 0dc0eeb

ImprovedOutputFileTimingdual_readoutllp
Last change on this file since 0dc0eeb was 0dc0eeb, checked in by pavel <pavel@…>, 7 years ago

read reweighting information from LHEF

  • Property mode set to 100644
File size: 5.7 KB
Line 
1
2/** \class DelphesLHEFReader
3 *
4 *  Reads LHEF file
5 *
6 *
7 *  $Date$
8 *  $Revision$
9 *
10 *
11 *  \author P. Demin - UCL, Louvain-la-Neuve
12 *
13 */
14
15#include "classes/DelphesLHEFReader.h"
16
17#include <stdexcept>
18#include <iostream>
19#include <sstream>
20
21#include <stdio.h>
22
23#include "TObjArray.h"
24#include "TStopwatch.h"
25#include "TDatabasePDG.h"
26#include "TParticlePDG.h"
27#include "TLorentzVector.h"
28
29#include "classes/DelphesClasses.h"
30#include "classes/DelphesFactory.h"
31#include "classes/DelphesStream.h"
32
33#include "ExRootAnalysis/ExRootTreeBranch.h"
34
35using namespace std;
36
37static const int kBufferSize  = 1024;
38
39//---------------------------------------------------------------------------
40
41DelphesLHEFReader::DelphesLHEFReader() :
42  fInputFile(0), fBuffer(0), fPDG(0),
43  fEventReady(kFALSE), fEventCounter(-1), fParticleCounter(-1)
44{
45  fBuffer = new char[kBufferSize];
46
47  fPDG = TDatabasePDG::Instance();
48}
49
50//---------------------------------------------------------------------------
51
52DelphesLHEFReader::~DelphesLHEFReader()
53{
54  if(fBuffer) delete[] fBuffer;
55}
56
57//---------------------------------------------------------------------------
58
59void DelphesLHEFReader::SetInputFile(FILE *inputFile)
60{
61  fInputFile = inputFile;
62}
63
64//---------------------------------------------------------------------------
65
66void DelphesLHEFReader::Clear()
67{
68  fEventReady = kFALSE;
69  fEventCounter = -1;
70  fParticleCounter = -1;
71  fRwgtList.clear();
72}
73
74//---------------------------------------------------------------------------
75
76bool DelphesLHEFReader::EventReady()
77{
78  return fEventReady;
79}
80
81//---------------------------------------------------------------------------
82
83bool DelphesLHEFReader::ReadBlock(DelphesFactory *factory,
84  TObjArray *allParticleOutputArray,
85  TObjArray *stableParticleOutputArray,
86  TObjArray *partonOutputArray)
87{
88  int rc;
89  char *pch;
90  double weight;
91
92  if(!fgets(fBuffer, kBufferSize, fInputFile)) return kFALSE;
93
94  if(strstr(fBuffer, "<event>"))
95  {
96    Clear();
97    fEventCounter = 1;
98  }
99  else if(fEventCounter > 0)
100  {
101    DelphesStream bufferStream(fBuffer);
102
103    rc = bufferStream.ReadInt(fParticleCounter)
104      && bufferStream.ReadInt(fProcessID)
105      && bufferStream.ReadDbl(fWeight)
106      && bufferStream.ReadDbl(fScalePDF)
107      && bufferStream.ReadDbl(fAlphaQED)
108      && bufferStream.ReadDbl(fAlphaQCD);
109
110    if(!rc)
111    {
112      cerr << "** ERROR: " << "invalid event format" << endl;
113      return kFALSE;
114    }
115
116    --fEventCounter;
117  }
118  else if(fParticleCounter > 0)
119  {
120    DelphesStream bufferStream(fBuffer);
121
122    rc = bufferStream.ReadInt(fPID)
123      && bufferStream.ReadInt(fStatus)
124      && bufferStream.ReadInt(fM1)
125      && bufferStream.ReadInt(fM2)
126      && bufferStream.ReadInt(fC1)
127      && bufferStream.ReadInt(fC2)
128      && bufferStream.ReadDbl(fPx)
129      && bufferStream.ReadDbl(fPy)
130      && bufferStream.ReadDbl(fPz)
131      && bufferStream.ReadDbl(fE)
132      && bufferStream.ReadDbl(fMass);
133
134    if(!rc)
135    {
136      cerr << "** ERROR: " << "invalid particle format" << endl;
137      return kFALSE;
138    }
139
140    AnalyzeParticle(factory, allParticleOutputArray,
141      stableParticleOutputArray, partonOutputArray);
142
143    --fParticleCounter;
144  }
145  else if(strstr(fBuffer, "<wgt"))
146  {
147    pch = strstr(fBuffer, ">");
148    if(!pch)
149    {
150      cerr << "** ERROR: " << "invalid weight format" << endl;
151      return kFALSE;
152    }
153
154    DelphesStream bufferStream(pch + 1);
155    rc = bufferStream.ReadDbl(weight);
156
157    if(!rc)
158    {
159      cerr << "** ERROR: " << "invalid weight format" << endl;
160      return kFALSE;
161    }
162
163    fRwgtList.push_back(weight);
164  }
165  else if(strstr(fBuffer, "</event>"))
166  {
167    fEventReady = kTRUE;
168  }
169
170  return kTRUE;
171}
172
173//---------------------------------------------------------------------------
174
175void DelphesLHEFReader::AnalyzeEvent(ExRootTreeBranch *branch, long long eventNumber,
176  TStopwatch *readStopWatch, TStopwatch *procStopWatch)
177{
178  LHEFEvent *element;
179
180  element = static_cast<LHEFEvent *>(branch->NewEntry());
181  element->Number = eventNumber;
182
183  element->ProcessID = fProcessID;
184  element->Weight = fWeight;
185  element->ScalePDF = fScalePDF;
186  element->AlphaQED = fAlphaQED;
187  element->AlphaQCD = fAlphaQCD;
188
189  element->ReadTime = readStopWatch->RealTime();
190  element->ProcTime = procStopWatch->RealTime();
191}
192
193//---------------------------------------------------------------------------
194
195void DelphesLHEFReader::AnalyzeRwgt(ExRootTreeBranch *branch)
196{
197  Weight *element;
198  vector<double>::const_iterator itRwgtList;
199
200  for(itRwgtList = fRwgtList.begin(); itRwgtList != fRwgtList.end(); ++itRwgtList)
201  {
202    element = static_cast<Weight *>(branch->NewEntry());
203
204    element->Weight = *itRwgtList;
205  }
206}
207
208//---------------------------------------------------------------------------
209
210void DelphesLHEFReader::AnalyzeParticle(DelphesFactory *factory,
211  TObjArray *allParticleOutputArray,
212  TObjArray *stableParticleOutputArray,
213  TObjArray *partonOutputArray)
214{
215  Candidate *candidate;
216  TParticlePDG *pdgParticle;
217  int pdgCode;
218
219  candidate = factory->NewCandidate();
220
221  candidate->PID = fPID;
222  pdgCode = TMath::Abs(candidate->PID);
223
224  candidate->Status = fStatus;
225
226  pdgParticle = fPDG->GetParticle(fPID);
227  candidate->Charge = pdgParticle ? int(pdgParticle->Charge()/3.0) : -999;
228  candidate->Mass = fMass;
229
230  candidate->Momentum.SetPxPyPzE(fPx, fPy, fPz, fE);
231  candidate->Position.SetXYZT(0.0, 0.0, 0.0, 0.0);
232
233  candidate->M1 = fM1 - 1;
234  candidate->M2 = fM2 - 1;
235
236  candidate->D1 = -1;
237  candidate->D2 = -1;
238
239  allParticleOutputArray->Add(candidate);
240
241  if(!pdgParticle) return;
242
243  if(fStatus == 1 && pdgParticle->Stable())
244  {
245    stableParticleOutputArray->Add(candidate);
246  }
247  else if(pdgCode <= 5 || pdgCode == 21 || pdgCode == 15)
248  {
249    partonOutputArray->Add(candidate);
250  }
251}
252
253//---------------------------------------------------------------------------
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