Gabriele Cosmo
84 lines
3.8 KiB
C++
84 lines
3.8 KiB
C++
//
|
|
// ********************************************************************
|
|
// * 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. *
|
|
// ********************************************************************
|
|
//
|
|
// G4VImportanceAlgorithm
|
|
//
|
|
// Class description:
|
|
//
|
|
// This is an interface used by importance sampling to get the
|
|
// number of copies and weight a mother particle should be split
|
|
// into when crossing a boundary of "importance cells".
|
|
// The interface defines the input to be the ratio of the pre over
|
|
// the post importance and the weight of the mother track.
|
|
// It returns a struct containing the number of copies (including
|
|
// the mother track) to be produced and the weight of each track.
|
|
// A user defined algorithm deriving from this interface may be used
|
|
// by the importance sampling.
|
|
|
|
// Author: Michael Dressel (CERN), 2002
|
|
// ----------------------------------------------------------------------
|
|
#ifndef G4VIMPORTANCEALGORITHM_HH
|
|
#define G4VIMPORTANCEALGORITHM_HH
|
|
|
|
#include "G4Nsplit_Weight.hh"
|
|
|
|
/**
|
|
* @brief G4VImportanceAlgorithm is an interface used by importance sampling
|
|
* to get the number of copies and weight a mother particle should be split
|
|
* into when crossing a boundary of "importance cells".
|
|
* The interface defines the input to be the ratio of the pre over the post
|
|
* importance and the weight of the mother track.
|
|
* It returns a struct containing the number of copies (including the mother
|
|
* track) to be produced and the weight of each track.
|
|
* A user defined algorithm deriving from this interface may be used by the
|
|
* importance sampling.
|
|
*/
|
|
|
|
class G4VImportanceAlgorithm
|
|
{
|
|
public:
|
|
|
|
/**
|
|
* Default Constructor and Destructor.
|
|
*/
|
|
G4VImportanceAlgorithm() = default;
|
|
virtual ~G4VImportanceAlgorithm() = default;
|
|
|
|
/**
|
|
* Calculates the number of tracks and their weight according to the
|
|
* pre and post importance value and the weight of the mother track.
|
|
* @param[in] ipre "pre" importance value.
|
|
* @param[in] ipost "post" importance value.
|
|
* @param[in] init_w Initial weight value.
|
|
* @returns A struct containing the number of copies (including the
|
|
* mother track) to be produced and the weight of each track.
|
|
*/
|
|
virtual G4Nsplit_Weight Calculate(G4double ipre,
|
|
G4double ipost,
|
|
G4double init_w) const = 0;
|
|
};
|
|
|
|
#endif
|