examples/extended/geometry/transforms/include/DetectorConstruction.hh

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// $Id: DetectorConstruction.hh 68023 2013-03-13 13:40:16Z gcosmo $
// 
/// \file DetectorConstruction.hh
/// \brief Definition of the DetectorConstruction class

#ifndef DetectorConstruction_h
#define DetectorConstruction_h 1

#include "G4VUserDetectorConstruction.hh"

#include "globals.hh"

class DetectorMessenger;
class G4LogicalVolume;
class G4VPhysicalVolume;

/// Detector construction class to demonstrate various ways of placement
///
/// The geometry setup consists of two trapezoid volumes which are placed 
/// in a world so that their axial symmetry axis is in given theta and phi 
/// polar angles. The various ways of placement are implemented in the 
/// DetectorConstruction class in the following private functions:
///  - PlaceWithDirectMatrix()
///  - PlaceWithInverseMatrix()
///  - PlaceWithAxialRotations()
///  - PlaceWithEulerAngles()
///  - PlaceWithReflections()
///
/// which are then called from the Construct() function.
/// All method defines exactly same geometry except for the placement 
/// with reflection where trapezoids are placed with their symmetry axis 
/// in parallel with z-axis in order to make easier to check reflection 
/// visually. 

class DetectorConstruction : public G4VUserDetectorConstruction
{
  public:
    enum EMethod {
      kWithDirectMatrix,
      kWithInverseMatrix,
      kWithAxialRotations,
      kWithEulerAngles,
      kWithReflections
    };  

  public:
    DetectorConstruction();
   ~DetectorConstruction();

  public:
    // methods from base class 
    virtual G4VPhysicalVolume* Construct();
    
    // set methods
    void SetMethod(EMethod method);
                       
  private:
    // methods
    void PlaceWithDirectMatrix();
    void PlaceWithInverseMatrix();
    void PlaceWithAxialRotations();
    void PlaceWithEulerAngles();
    void PlaceWithReflections();

    // data members
    DetectorMessenger* fMessenger;
    EMethod  fMethod;
    G4LogicalVolume* fWorldVolume;
    G4LogicalVolume* fTrdVolume;
};

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#endif