[d7d2da3] | 1 |
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| 2 | /** \class DelphesHepMCReader
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| 3 | *
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| 4 | * Reads HepMC file
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| 5 | *
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| 6 | *
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| 7 | * $Date$
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| 8 | * $Revision$
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| 9 | *
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| 10 | *
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| 11 | * \author P. Demin - UCL, Louvain-la-Neuve
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| 12 | *
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| 13 | */
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| 14 |
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| 15 | #include "classes/DelphesHepMCReader.h"
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| 16 |
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| 17 | #include <stdexcept>
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| 18 | #include <iostream>
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| 19 | #include <sstream>
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| 20 |
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| 21 | #include <map>
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| 22 |
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| 23 | #include <stdio.h>
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| 24 |
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| 25 | #include "TObjArray.h"
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| 26 | #include "TStopwatch.h"
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| 27 | #include "TDatabasePDG.h"
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| 28 | #include "TParticlePDG.h"
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| 29 | #include "TLorentzVector.h"
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| 30 |
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| 31 | #include "classes/DelphesClasses.h"
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| 32 | #include "classes/DelphesFactory.h"
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| 33 | #include "classes/DelphesStream.h"
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| 34 |
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| 35 | #include "ExRootAnalysis/ExRootTreeBranch.h"
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| 36 |
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| 37 | using namespace std;
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| 38 |
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| 39 | static const int kBufferSize = 1024;
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| 40 |
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| 41 | //---------------------------------------------------------------------------
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| 42 |
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| 43 | DelphesHepMCReader::DelphesHepMCReader() :
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| 44 | fInputFile(0), fBuffer(0), fPDG(0),
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| 45 | fVertexCounter(-1), fInCounter(-1), fOutCounter(-1),
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| 46 | fParticleCounter(0)
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| 47 | {
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| 48 | fBuffer = new char[kBufferSize];
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| 49 |
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| 50 | fPDG = TDatabasePDG::Instance();
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| 51 | }
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| 52 |
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| 53 | //---------------------------------------------------------------------------
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| 54 |
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| 55 | DelphesHepMCReader::~DelphesHepMCReader()
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| 56 | {
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| 57 | if(fBuffer) delete[] fBuffer;
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| 58 | }
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| 59 |
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| 60 | //---------------------------------------------------------------------------
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| 61 |
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| 62 | void DelphesHepMCReader::SetInputFile(FILE *inputFile)
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| 63 | {
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| 64 | fInputFile = inputFile;
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| 65 | }
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| 66 |
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| 67 | //---------------------------------------------------------------------------
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| 68 |
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| 69 | void DelphesHepMCReader::Clear()
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| 70 | {
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| 71 | fVertexCounter = -1;
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| 72 | fInCounter = -1;
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| 73 | fOutCounter = -1;
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| 74 | fMotherMap.clear();
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| 75 | fDaughterMap.clear();
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| 76 | fParticleCounter = 0;
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| 77 | }
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| 78 |
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| 79 | //---------------------------------------------------------------------------
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| 80 |
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| 81 | bool DelphesHepMCReader::EventReady()
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| 82 | {
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| 83 | return (fVertexCounter == 0) && (fInCounter == 0) && (fOutCounter == 0);
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| 84 | }
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| 85 |
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| 86 | //---------------------------------------------------------------------------
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| 87 |
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| 88 | bool DelphesHepMCReader::ReadBlock(DelphesFactory *factory,
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| 89 | TObjArray *allParticleOutputArray,
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| 90 | TObjArray *stableParticleOutputArray,
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| 91 | TObjArray *partonOutputArray)
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| 92 | {
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| 93 | map< int, pair< int, int > >::iterator itMotherMap;
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| 94 | map< int, pair< int, int > >::iterator itDaughterMap;
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| 95 | char key;
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| 96 | int rc;
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| 97 |
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| 98 | if(!fgets(fBuffer, kBufferSize, fInputFile)) return kFALSE;
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| 99 |
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| 100 | DelphesStream bufferStream(fBuffer + 1);
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| 101 |
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| 102 | key = fBuffer[0];
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| 103 |
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| 104 | if(key == 'E')
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| 105 | {
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| 106 | Clear();
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| 107 |
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| 108 | rc = bufferStream.ReadInt(fEventNumber)
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| 109 | && bufferStream.ReadInt(fMPI)
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| 110 | && bufferStream.ReadDbl(fScale)
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| 111 | && bufferStream.ReadDbl(fAlphaQCD)
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| 112 | && bufferStream.ReadDbl(fAlphaQED)
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| 113 | && bufferStream.ReadInt(fProcessID)
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| 114 | && bufferStream.ReadInt(fSignalCode)
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| 115 | && bufferStream.ReadInt(fVertexCounter);
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| 116 |
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| 117 | if(!rc)
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| 118 | {
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| 119 | cerr << "** ERROR: " << "invalid event format" << endl;
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| 120 | return kFALSE;
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| 121 | }
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| 122 | }
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| 123 | else if(key == 'F')
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| 124 | {
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| 125 | rc = bufferStream.ReadInt(fID1)
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| 126 | && bufferStream.ReadInt(fID2)
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| 127 | && bufferStream.ReadDbl(fX1)
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| 128 | && bufferStream.ReadDbl(fX2)
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| 129 | && bufferStream.ReadDbl(fScalePDF)
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| 130 | && bufferStream.ReadDbl(fPDF1)
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| 131 | && bufferStream.ReadDbl(fPDF2);
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| 132 |
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| 133 | if(!rc)
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| 134 | {
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| 135 | cerr << "** ERROR: " << "invalid PDF format" << endl;
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| 136 | return kFALSE;
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| 137 | }
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| 138 | }
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| 139 | else if(key == 'V' && fVertexCounter > 0)
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| 140 | {
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| 141 | rc = bufferStream.ReadInt(fOutVertexCode)
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| 142 | && bufferStream.ReadInt(fVertexID)
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| 143 | && bufferStream.ReadDbl(fX)
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| 144 | && bufferStream.ReadDbl(fY)
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| 145 | && bufferStream.ReadDbl(fZ)
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| 146 | && bufferStream.ReadDbl(fT)
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| 147 | && bufferStream.ReadInt(fInCounter)
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| 148 | && bufferStream.ReadInt(fOutCounter);
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| 149 |
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| 150 | if(!rc)
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| 151 | {
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| 152 | cerr << "** ERROR: " << "invalid vertex format" << endl;
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| 153 | return kFALSE;
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| 154 | }
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| 155 | --fVertexCounter;
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| 156 | }
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| 157 | else if(key == 'P' && fOutCounter > 0)
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| 158 | {
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| 159 | rc = bufferStream.ReadInt(fParticleCode)
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| 160 | && bufferStream.ReadInt(fPID)
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| 161 | && bufferStream.ReadDbl(fPx)
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| 162 | && bufferStream.ReadDbl(fPy)
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| 163 | && bufferStream.ReadDbl(fPz)
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| 164 | && bufferStream.ReadDbl(fE)
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| 165 | && bufferStream.ReadDbl(fMass)
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| 166 | && bufferStream.ReadInt(fStatus)
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| 167 | && bufferStream.ReadDbl(fTheta)
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| 168 | && bufferStream.ReadDbl(fPhi)
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| 169 | && bufferStream.ReadInt(fInVertexCode);
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| 170 |
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| 171 | if(!rc)
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| 172 | {
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| 173 | cerr << "** ERROR: " << "invalid particle format" << endl;
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| 174 | return kFALSE;
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| 175 | }
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| 176 |
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| 177 | if(fInVertexCode < 0)
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| 178 | {
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| 179 | itMotherMap = fMotherMap.find(fInVertexCode);
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| 180 | if(itMotherMap == fMotherMap.end())
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| 181 | {
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| 182 | fMotherMap[fInVertexCode] = make_pair(fParticleCounter, -1);
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| 183 | }
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| 184 | else
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| 185 | {
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| 186 | itMotherMap->second.second = fParticleCounter;
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| 187 | }
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| 188 | }
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| 189 |
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| 190 | if(fInCounter <= 0)
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| 191 | {
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| 192 | itDaughterMap = fDaughterMap.find(fOutVertexCode);
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| 193 | if(itDaughterMap == fDaughterMap.end())
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| 194 | {
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| 195 | fDaughterMap[fOutVertexCode] = make_pair(fParticleCounter, fParticleCounter);
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| 196 | }
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| 197 | else
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| 198 | {
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| 199 | itDaughterMap->second.second = fParticleCounter;
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| 200 | }
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| 201 | }
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| 202 |
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| 203 | AnalyzeParticle(factory, allParticleOutputArray,
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| 204 | stableParticleOutputArray, partonOutputArray);
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| 205 |
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| 206 | if(fInCounter > 0)
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| 207 | {
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| 208 | --fInCounter;
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| 209 | }
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| 210 | else
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| 211 | {
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| 212 | --fOutCounter;
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| 213 | }
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| 214 |
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| 215 | ++fParticleCounter;
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| 216 | }
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| 217 |
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| 218 | if(EventReady())
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| 219 | {
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| 220 | FinalizeParticles(allParticleOutputArray);
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| 221 | }
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| 222 |
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| 223 | return kTRUE;
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| 224 | }
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| 225 |
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| 226 | //---------------------------------------------------------------------------
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| 227 |
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| 228 | void DelphesHepMCReader::AnalyzeEvent(ExRootTreeBranch *branch, long long eventNumber,
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| 229 | TStopwatch *readStopWatch, TStopwatch *procStopWatch)
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| 230 | {
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| 231 | HepMCEvent *element;
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| 232 |
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| 233 | element = static_cast<HepMCEvent *>(branch->NewEntry());
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| 234 | element->Number = fEventNumber;
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| 235 |
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| 236 | element->ProcessID = fProcessID;
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| 237 | element->MPI = fMPI;
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| 238 | element->Scale = fScale;
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| 239 | element->AlphaQED = fAlphaQED;
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| 240 | element->AlphaQCD = fAlphaQCD;
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| 241 |
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| 242 | element->ID1 = fID1;
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| 243 | element->ID2 = fID2;
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| 244 | element->X1 = fX1;
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| 245 | element->X2 = fX2;
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| 246 | element->ScalePDF = fScalePDF;
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| 247 | element->PDF1 = fPDF1;
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| 248 | element->PDF2 = fPDF2;
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| 249 |
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| 250 | element->ReadTime = readStopWatch->RealTime();
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| 251 | element->ProcTime = procStopWatch->RealTime();
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| 252 | }
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| 253 |
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| 254 | //---------------------------------------------------------------------------
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| 255 |
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| 256 | void DelphesHepMCReader::AnalyzeParticle(DelphesFactory *factory,
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| 257 | TObjArray *allParticleOutputArray,
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| 258 | TObjArray *stableParticleOutputArray,
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| 259 | TObjArray *partonOutputArray)
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| 260 | {
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| 261 | Candidate *candidate;
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| 262 | TParticlePDG *pdgParticle;
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| 263 | int pdgCode;
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| 264 |
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| 265 | candidate = factory->NewCandidate();
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| 266 |
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| 267 | candidate->PID = fPID;
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| 268 | pdgCode = TMath::Abs(candidate->PID);
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| 269 |
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| 270 | candidate->Status = fStatus;
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| 271 |
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| 272 | pdgParticle = fPDG->GetParticle(fPID);
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| 273 | candidate->Charge = pdgParticle ? int(pdgParticle->Charge()/3.0) : -999;
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| 274 | candidate->Mass = pdgParticle ? pdgParticle->Mass() : -999.9;
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| 275 |
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| 276 | candidate->Momentum.SetPxPyPzE(fPx, fPy, fPz, fE);
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| 277 |
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| 278 | candidate->M2 = 1;
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| 279 | candidate->D2 = 1;
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| 280 | if(fInCounter > 0)
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| 281 | {
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| 282 | candidate->M1 = 1;
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| 283 | candidate->Position.SetXYZT(0.0, 0.0, 0.0, 0.0);
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| 284 | }
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| 285 | else
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| 286 | {
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| 287 | candidate->M1 = fOutVertexCode;
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| 288 | candidate->Position.SetXYZT(fX, fY, fZ, fT);
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| 289 | }
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| 290 | if(fInVertexCode < 0)
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| 291 | {
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| 292 | candidate->D1 = fInVertexCode;
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| 293 | }
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| 294 | else
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| 295 | {
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| 296 | candidate->D1 = 1;
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| 297 | }
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| 298 |
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| 299 | allParticleOutputArray->Add(candidate);
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| 300 |
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| 301 | if(!pdgParticle) return;
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| 302 |
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| 303 | if(fStatus == 1 && pdgParticle->Stable())
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| 304 | {
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| 305 | stableParticleOutputArray->Add(candidate);
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| 306 | }
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| 307 | else if(pdgCode <= 5 || pdgCode == 21 || pdgCode == 15)
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| 308 | {
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| 309 | partonOutputArray->Add(candidate);
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| 310 | }
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| 311 | }
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| 312 |
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| 313 | //---------------------------------------------------------------------------
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| 314 |
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| 315 | void DelphesHepMCReader::FinalizeParticles(TObjArray *allParticleOutputArray)
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| 316 | {
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| 317 | Candidate *candidate;
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| 318 | map< int, pair< int, int > >::iterator itMotherMap;
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| 319 | map< int, pair< int, int > >::iterator itDaughterMap;
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| 320 | int i;
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| 321 |
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| 322 | for(i = 0; i < allParticleOutputArray->GetEntriesFast(); ++i)
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| 323 | {
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| 324 | candidate = static_cast<Candidate *>(allParticleOutputArray->At(i));
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| 325 |
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| 326 | if(candidate->M1 > 0)
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| 327 | {
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| 328 | candidate->M1 = -1;
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| 329 | candidate->M2 = -1;
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| 330 | }
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| 331 | else
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| 332 | {
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| 333 | itMotherMap = fMotherMap.find(candidate->M1);
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| 334 | if(itMotherMap == fMotherMap.end())
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| 335 | {
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| 336 | candidate->M1 = -1;
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| 337 | candidate->M2 = -1;
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| 338 | }
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| 339 | else
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| 340 | {
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| 341 | candidate->M1 = itMotherMap->second.first;
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| 342 | candidate->M2 = itMotherMap->second.second;
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| 343 | }
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| 344 | }
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| 345 | if(candidate->D1 > 0)
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| 346 | {
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| 347 | candidate->D1 = -1;
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| 348 | candidate->D2 = -1;
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| 349 | }
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| 350 | else
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| 351 | {
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| 352 | itDaughterMap = fDaughterMap.find(candidate->D1);
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| 353 | if(itDaughterMap == fDaughterMap.end())
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| 354 | {
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| 355 | candidate->D1 = -1;
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| 356 | candidate->D2 = -1;
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| 357 | }
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| 358 | else
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| 359 | {
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| 360 | candidate->D1 = itDaughterMap->second.first;
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| 361 | candidate->D2 = itDaughterMap->second.second;
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| 362 | }
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| 363 | }
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| 364 | }
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| 365 | }
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| 366 |
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| 367 | //---------------------------------------------------------------------------
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