Geant4 Cross Reference

Cross-Referencing   Geant4
Geant4/processes/parameterisation/src/G4FastSimulationHelper.cc

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  1 //
  2 // ********************************************************************
  3 // * License and Disclaimer                                           *
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 25 //
 26 #include "G4FastSimulationHelper.hh"
 27 
 28 #include "G4FastSimulationManagerProcess.hh"
 29 #include "G4ProcessManager.hh"
 30 
 31 void G4FastSimulationHelper::ActivateFastSimulation(G4ProcessManager* pmanager,
 32                                                     G4String parallelGeometryName)
 33 {
 34   G4FastSimulationManagerProcess* fastSimProcess;
 35   if (parallelGeometryName.empty()) {
 36     fastSimProcess = new G4FastSimulationManagerProcess("fastSimProcess_massGeom");
 37     // -- For the parametrisation envelope belonging to the mass geometry case, the
 38     // G4FastSimulationManagerProcess
 39     // -- is a PostStep process, and ordering does not matter:
 40     pmanager->AddDiscreteProcess(fastSimProcess);
 41   }
 42   else {
 43     fastSimProcess =
 44       new G4FastSimulationManagerProcess("fastSimProcess_parallelGeom", parallelGeometryName);
 45     // -- For the parallel geometry case, the G4FastSimulationManagerProcessz
 46     // -- is an Along+PostStep process, and ordering matters:
 47     pmanager->AddProcess(fastSimProcess);
 48     pmanager->SetProcessOrdering(fastSimProcess, idxAlongStep, 1);
 49   }
 50   // If the parallel world
 51   // exists (with parallel world physics), e.g. for the sensitive detector.
 52   // In that case make sure fast simulation is the first process to be checked by the steppping
 53   // manager (highest ordering) so that user can kill the particle and/or deposit energy, ignoring
 54   // other processes. Otherwise the parallel world physics (which is a StronglyFroced process) will
 55   // invoke a PostStepDoIt on the same step, leading to e.g. duplicated energy deposits.
 56 
 57   // Register as the process with highest ordering so it is checked as the first one,
 58   // and since it is exclusively forced no other process will be considered (to be invoked).
 59   pmanager->SetProcessOrderingToLast(fastSimProcess, idxPostStep);
 60 }
 61