Gabriele Cosmo
61 lines
2.9 KiB
C++
61 lines
2.9 KiB
C++
//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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// G4VImportanceAlgorithm
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//
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// Class description:
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//
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// This is an interface used by importance sampling to get the
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// number of copies and weight a mother particle should be split
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// into when crossing a boundary of "importance cells".
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// The interface defines the input to be the ratio of the pre over
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// the post importance and the weight of the mother track.
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// It returns a struct containing the number of copies (including
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// the mother track) to be produced and the weight of each track.
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// A user defined algorithm deriving from this interface may be used
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// by the importance sampling.
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// Author: Michael Dressel (CERN), 2002
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// ----------------------------------------------------------------------
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#ifndef G4VIMPORTANCEALGORITHM_HH
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#define G4VIMPORTANCEALGORITHM_HH 1
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#include "G4Nsplit_Weight.hh"
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class G4VImportanceAlgorithm
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{
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public: // with description
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G4VImportanceAlgorithm();
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virtual ~G4VImportanceAlgorithm();
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virtual G4Nsplit_Weight Calculate(G4double ipre,
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G4double ipost,
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G4double init_w) const = 0;
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// calculate the number of tracks and their weight according to the
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// pre and post importance value and the weight of the mother track
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};
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#endif
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