Merge pull request #423 from gconesab/master

Macros to run Pythia6 and EPOS with user defined trigger on MC events…

MC/CustomGenerators/DPG/EPOS_UserTrigger.C

@@ -0,0 +1,31 @@
+///
+/// \file EPOS_UserTrigger.C
+/// \brief Configuration of EPOSLHC with external trigger user defined
+///
+/// Generate EPOSLHC events, while the event is generated, check that
+/// the user trigger conditions on the event are fulfilled. The user trigger
+/// must be defined in macro UserTrigger.C
+///
+/// \author Luca Micheletti <luca.micheletti@cern.ch>
+/// \author Gustavo Conesa Balbastre <gustavo.conesa.balbastre@cern.ch>
+
+#if !defined(__CINT__) || defined(__MAKECINT__)
+ #include "UserTrigger.C"
+#endif
+
+//------
+/// Main, configure EPOSLHC events via standard configuration in GeneratorConfig.C
+/// adding an external event trigger defined in UserTrigger.C
+//------
+AliGenerator * GeneratorCustom()
+{
+  AliGenerator * generator = GeneratorEPOSLHC();
+
+#if defined(__CINT__)
+  gROOT->LoadMacro("UserTrigger.C+");
+#endif
+
+  UserTrigger(generator); 
+
+  return generator;
+}

MC/CustomGenerators/DPG/Pythia6_UserTrigger.C

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+///
+/// \file Pythia6_UserTrigger.C
+/// \brief Configuration of Pythia6 with external trigger user defined
+///
+/// Generate PYTHIA6 events, while the event is generated, check that
+/// the user trigger conditions on the event are fulfilled. The user trigger
+/// must be defined in macro UserTrigger.C
+///
+/// \author Luca Micheletti <luca.micheletti@cern.ch>
+/// \author Gustavo Conesa Balbastre <gustavo.conesa.balbastre@cern.ch>
+
+#if !defined(__CINT__) || defined(__MAKECINT__)
+ #include "UserTrigger.C"
+#endif
+
+//------
+/// Main, configure PYTHIA6 events via standard configuration in GeneratorConfig.C
+/// adding an external event trigger defined in UserTrigger.C
+//------
+AliGenerator * GeneratorCustom()
+{
+  AliGenerator * generator = GeneratorPythia6();
+
+#if defined(__CINT__)
+  gROOT->LoadMacro("UserTrigger.C+");
+#endif
+
+  UserTrigger(generator); 
+
+  return generator;
+}

MC/CustomGenerators/DPG/UserTrigger.C

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+///
+/// \file UserTrigger.C
+/// \brief Example of user defined trigger, to be called by main CustomGenerator macro
+/// 
+/// Example of user trigger with simple multiplicity event selection.
+/// In Root5 it must be compiled
+///
+/// \author Luca Micheletti <luca.micheletti@cern.ch>
+/// \author Gustavo Conesa Balbastre <Gustavo.Conesa.Balbastre@cern.ch>
+
+
+#include "AliStack.h"
+#include "AliGenerator.h"
+
+//------
+/// User trigger logic to accept the event
+/// Here simple multiplicity selection
+//------
+Bool_t UserTriggerFunction(AliStack *stack)
+{
+  printf("____________________________\n");
+  printf("USER TRIGGER IMPLEMENTATION \n");
+
+  Int_t nTracks  = stack->GetNtrack();
+  printf("n Tracks = %i \n",nTracks);
+
+  if ( nTracks > 120 )
+  {
+    printf("\t accepted!\n");
+    return kTRUE;
+  }
+  else
+  {
+    printf("\t rejected!\n");
+    return kFALSE;
+  }
+}
+
+//------
+/// Main, pass the generator and set the user trigger
+//------
+void UserTrigger(AliGenerator * generator)
+{
+  Bool_t (*funcUserTrigger)(AliStack*) = UserTriggerFunction;
+
+//printf("*-*-*-* USER FUNC %p\n",funcUserTrigger);
+
+  generator->SetUserTrigger(funcUserTrigger);
+}