G4TouchableUtils.cc

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// John Allison  22nd August 2018
// Touchable utilities

#include "G4TouchableUtils.hh"

#include "G4TouchablePropertiesScene.hh"
#include "G4TransportationManager.hh"

G4PhysicalVolumeModel::TouchableProperties G4TouchableUtils::FindTouchableProperties
(G4ModelingParameters::PVNameCopyNoPath path)
{
  // If the search is not successful properties.fpTouchablePV will be null.
  G4PhysicalVolumeModel::TouchableProperties properties;
  G4TransportationManager* transportationManager =
  G4TransportationManager::GetTransportationManager ();
  size_t nWorlds = transportationManager->GetNoWorlds();
  std::vector<G4VPhysicalVolume*>::iterator iterWorld =
  transportationManager->GetWorldsIterator();
  for (size_t i = 0; i < nWorlds; ++i, ++iterWorld) {
    G4PhysicalVolumeModel pvModel (*iterWorld);  // Unlimited depth.
    G4ModelingParameters mp;  // Default - no culling.
    pvModel.SetModelingParameters (&mp);
    G4TouchablePropertiesScene scene (&pvModel,path);
    pvModel.DescribeYourselfTo (scene);  // Initiate geometry tree traversal.
    if (scene.GetFoundTouchableProperties().fpTouchablePV) {
      properties = scene.GetFoundTouchableProperties();
      break; // Found, so no need to scan more worlds.
    }
  }
  return properties;
}