source: trunk/source/event/include/G4AdjointPosOnPhysVolGenerator.hh @ 1197

//
// ********************************************************************
// * License and Disclaimer                                           *
// *                                                                  *
// * The  Geant4 software  is  copyright of the Copyright Holders  of *
// * the Geant4 Collaboration.  It is provided  under  the terms  and *
// * conditions of the Geant4 Software License,  included in the file *
// * LICENSE and available at  http://cern.ch/geant4/license .  These *
// * include a list of copyright holders.                             *
// *                                                                  *
// * Neither the authors of this software system, nor their employing *
// * institutes,nor the agencies providing financial support for this *
// * work  make  any representation or  warranty, express or implied, *
// * regarding  this  software system or assume any liability for its *
// * use.  Please see the license in the file  LICENSE  and URL above *
// * for the full disclaimer and the limitation of liability.         *
// *                                                                  *
// * This  code  implementation is the result of  the  scientific and *
// * technical work of the GEANT4 collaboration.                      *
// * By using,  copying,  modifying or  distributing the software (or *
// * any work based  on the software)  you  agree  to acknowledge its *
// * use  in  resulting  scientific  publications,  and indicate your *
// * acceptance of all terms of the Geant4 Software license.          *
// ********************************************************************
//
// $Id: G4AdjointPosOnPhysVolGenerator.hh,v 1.2 2009/11/18 17:57:59 gcosmo Exp $
// GEANT4 tag $Name: geant4-09-03-cand-01 $
//
/////////////////////////////////////////////////////////////////////////////////
//      Class Name:     G4AdjointPosOnPhysVolGenerator
//      Author:         L. Desorgher
//      Organisation:   SpaceIT GmbH
//      Contract:       ESA contract 21435/08/NL/AT
//      Customer:       ESA/ESTEC
/////////////////////////////////////////////////////////////////////////////////
//
// CHANGE HISTORY
// --------------
//      ChangeHistory: 
//              1st June 2006 creation by L. Desorgher                  
//
//-------------------------------------------------------------
//      Documentation:
//              This class is responsible for the generation of primary adjoint particle on the external surface of a user selected volume.
//              The particle are generated uniformly on the surface with the angular distribution  set to a cosine law relative to normal of the surface.
//              It is equivalent to  the flux going in  from the surface if an  isotropic flux is considered outside. 
//              It uses ray tracking technique and can be applied to all kind of convex volume. Uisng the ray tracking technique the area 
//              of the external surface is also computed. The area is needed to fix the weight of the primary adjoint particle.  
//              At the time of the development of this class, generation of particle on volume surface and computation of surface was limited in G4, 
//              therfore the general ray tracking technique was adopted. It could be now (2009) that direct method of G4VSolid could be used instead. To be checked! 
//
//              
//
#ifndef G4AdjointPosOnPhysVolGenerator_h
#define G4AdjointPosOnPhysVolGenerator_h 1

#include "G4VPhysicalVolume.hh"
#include "G4AffineTransform.hh"
#include "G4ThreeVector.hh"

class G4VSolid;

class G4AdjointPosOnPhysVolGenerator 
///////////////////////
{

//--------
  public: //without description
//--------

   static  G4AdjointPosOnPhysVolGenerator* GetInstance();
   
//--------
  public:  //public methods
//--------
  G4VPhysicalVolume* DefinePhysicalVolume(const G4String& aName);
  void DefinePhysicalVolume1(const G4String& aName);
  G4double ComputeAreaOfExtSurface();
  G4double ComputeAreaOfExtSurface(G4int NStat);
  G4double ComputeAreaOfExtSurface(G4double epsilon);
  G4double ComputeAreaOfExtSurface(G4VSolid* aSolid);
  G4double ComputeAreaOfExtSurface(G4VSolid* aSolid,G4int NStat);
  G4double ComputeAreaOfExtSurface(G4VSolid* aSolid,G4double epsilon);
 
  void GenerateAPositionOnTheExtSurfaceOfASolid(G4VSolid* aSolid,G4ThreeVector& p, G4ThreeVector&  direction);
  void GenerateAPositionOnTheExtSurfaceOfTheSolid(G4ThreeVector& p, G4ThreeVector&  direction);
  void GenerateAPositionOnTheExtSurfaceOfThePhysicalVolume(G4ThreeVector& p, G4ThreeVector&  direction);
  void GenerateAPositionOnTheExtSurfaceOfThePhysicalVolume(G4ThreeVector& p, G4ThreeVector&  direction,
                                                                                G4double& costh_to_normal);

  //inline public methods
   
  inline void SetSolid(G4VSolid* aSolid){theSolid=aSolid;}
  inline G4double GetAreaOfExtSurfaceOfThePhysicalVolume(){return AreaOfExtSurfaceOfThePhysicalVolume;}
  inline G4double GetCosThDirComparedToNormal(){return CosThDirComparedToNormal;}
  
//---------   
   private:   //private methods
//---------  
   G4AdjointPosOnPhysVolGenerator();
  ~G4AdjointPosOnPhysVolGenerator();
   G4double ComputeAreaOfExtSurfaceStartingFromSphere(G4VSolid* aSolid,G4int NStat);
   G4double ComputeAreaOfExtSurfaceStartingFromBox(G4VSolid* aSolid,G4int NStat);
   void GenerateAPositionOnASolidBoundary(G4VSolid* aSolid,G4ThreeVector& p, G4ThreeVector&  direction);
   G4double GenerateAPositionOnASphereBoundary(G4VSolid* aSolid,G4ThreeVector& p, G4ThreeVector&  direction);
   G4double GenerateAPositionOnABoxBoundary(G4VSolid* aSolid,G4ThreeVector& p, G4ThreeVector&  direction);
   void ComputeTransformationFromPhysVolToWorld();

//---------   
   private: //attributes
//---------   
   static G4AdjointPosOnPhysVolGenerator* theInstance;
   G4VSolid* theSolid;
   G4VPhysicalVolume* thePhysicalVolume;
   G4int NStat;
   G4double epsilon;
   G4bool UseSphere;
   G4String ModelOfSurfaceSource;
   G4double ExtSourceRadius;
   G4double ExtSourceDx,ExtSourceDy,ExtSourceDz ;
   G4AffineTransform theTransformationFromPhysVolToWorld;
   G4double AreaOfExtSurfaceOfThePhysicalVolume;
   G4double CosThDirComparedToNormal;
};

#endif