DetectorConstruction.h

/**************************************************************************
 * BASF2 (Belle Analysis Framework 2)                                     *
 * Copyright(C) 2010 - Belle II Collaboration                             *
 *                                                                        *
 * Author: The Belle II Collaboration                                     *
 * Contributors: Martin Ritter                                            *
 *                                                                        *
 * This software is provided "as is" without any warranty.                *
 **************************************************************************/
 
#ifndef DETECTORCONSTRUCTION_H
#define DETECTORCONSTRUCTION_H
 
#include <framework/logging/Logger.h>
#include <geometry/GeometryManager.h>
#include "G4VUserDetectorConstruction.hh"
 
namespace Belle2 {
  class DetectorConstruction: public G4VUserDetectorConstruction {
  public:
    G4VPhysicalVolume* Construct()
    {
      G4VPhysicalVolume* topVolume = geometry::GeometryManager::getInstance().getTopVolume();
      if (!topVolume) B2FATAL("No Geometry defined, please create the geometry"
                                " before doing simulation, normally by using the Geometry module.");
      return topVolume;
    }
  };
 
} //Belle2 namespace
#endif