Geant4TouchableHandler.cpp

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//==========================================================================
//  AIDA Detector description implementation 
//--------------------------------------------------------------------------
// Copyright (C) Organisation europeenne pour la Recherche nucleaire (CERN)
// All rights reserved.
//
// For the licensing terms see $DD4hepINSTALL/LICENSE.
// For the list of contributors see $DD4hepINSTALL/doc/CREDITS.
//
// Author     : M.Frank
//
//==========================================================================
 
// Framework include files
#include <DDG4/Geant4TouchableHandler.h>
#include <DDG4/Geant4GeometryInfo.h>
 
#include <G4Step.hh>
#include <G4VTouchable.hh>
 
using namespace dd4hep::sim;
 
Geant4TouchableHandler::Geant4TouchableHandler(const G4Step* step, bool use_post_step_point)  {
  const G4StepPoint* p = use_post_step_point ? step->GetPostStepPoint() : step->GetPreStepPoint();
  touchable = p->GetTouchable();
}
 
Geant4TouchableHandler::Geant4TouchableHandler(const G4Step* step)  {
  touchable = step->GetPreStepPoint()->GetTouchable();
}
 
int Geant4TouchableHandler::depth() const   {
  return touchable->GetHistoryDepth();
}
 
Geant4TouchableHandler::Geant4PlacementPath Geant4TouchableHandler::placementPath(bool exception) const {
  Geant4PlacementPath path_val;
  if ( touchable )   {
    int i, n=touchable->GetHistoryDepth();
    path_val.reserve(n);
    for (i=0; i < n; ++i) {
      G4VPhysicalVolume* pv = touchable->GetVolume(i);
      path_val.emplace_back(pv);
    }
    return path_val;
  }
  if ( exception )   {
    except("Geant4TouchableHandler", "Attempt to access invalid G4 touchable object.");
  }
  return path_val;
}
 
std::string Geant4TouchableHandler::placementPath(const Geant4PlacementPath& path, bool reverse)   {
  std::string path_name;
  if ( reverse )  {
    for (Geant4PlacementPath::const_reverse_iterator pIt = path.rbegin(); pIt != path.rend(); ++pIt) {
      path_name += "/"; path_name += (*pIt)->GetName();
    }
  }
  else  {
    for (Geant4PlacementPath::const_iterator pIt = path.begin(); pIt != path.end(); ++pIt) {
      path_name += "/"; path_name += (*pIt)->GetName();
    }
  }
  return path_name;
}
 
std::string Geant4TouchableHandler::path()  const   {
  return Geant4TouchableHandler::placementPath(this->placementPath());
}