Gabriele Cosmo
125 lines
4.5 KiB
C++
125 lines
4.5 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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//
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// $Id: G4QGSMFragmentation.cc,v 1.5 2006/06/29 20:55:05 gunter Exp $
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// GEANT4 tag $Name: geant4-08-01 $
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//
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// -----------------------------------------------------------------------------
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// GEANT 4 class implementation file
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//
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// History: first implementation, Maxim Komogorov, 10-Jul-1998
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// -----------------------------------------------------------------------------
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#include "G4QGSMFragmentation.hh"
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#include "Randomize.hh"
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#include "G4ios.hh"
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// Class G4QGSMFragmentation
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//****************************************************************************************
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G4QGSMFragmentation::G4QGSMFragmentation() :
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arho(0.5), aphi(0.), an(-0.5), ala(-0.75), aksi(-1.), alft(0.5)
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{
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}
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G4QGSMFragmentation::G4QGSMFragmentation(const G4QGSMFragmentation &) : G4VLongitudinalStringDecay(),
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arho(0.5), aphi(0.), an(-0.5), ala(-0.75), aksi(-1.), alft(0.5)
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{
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}
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G4QGSMFragmentation::~G4QGSMFragmentation()
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{
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}
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//****************************************************************************************
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const G4QGSMFragmentation & G4QGSMFragmentation::operator=(const G4QGSMFragmentation &)
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{
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throw G4HadronicException(__FILE__, __LINE__, "G4QGSMFragmentation::operator= meant to not be accessable");
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return *this;
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}
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int G4QGSMFragmentation::operator==(const G4QGSMFragmentation &right) const
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{
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return !memcmp(this, &right, sizeof(G4QGSMFragmentation));
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}
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int G4QGSMFragmentation::operator!=(const G4QGSMFragmentation &right) const
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{
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return memcmp(this, &right, sizeof(G4QGSMFragmentation));
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}
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//****************************************************************************************
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G4double G4QGSMFragmentation::GetLightConeZ(G4double zmin, G4double zmax, G4int PartonEncoding, G4ParticleDefinition* , G4double , G4double )
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{
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G4double z;
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G4double theA(0), d1, d2, yf;
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G4int absCode = std::abs( PartonEncoding );
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if (absCode < 10)
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{
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if(absCode == 1 || absCode == 2) theA = arho;
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else if(absCode == 3) theA = aphi;
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else throw G4HadronicException(__FILE__, __LINE__, "Unknown PDGencoding in G4QGSMFragmentation::G4LightConeZ");
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do
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{
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z = zmin + G4UniformRand() * (zmax - zmin);
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d1 = (1. - z);
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d2 = (alft - theA);
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yf = std::pow(d1, d2);
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}
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while (G4UniformRand() > yf);
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}
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else
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{
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if(absCode == 1103 || absCode == 2101 ||
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absCode == 2203 || absCode == 2103)
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{
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d2 = (alft - (2.*an - arho));
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}
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else if(absCode == 3101 || absCode == 3103 ||
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absCode == 3201 || absCode == 3203)
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{
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d2 = (alft - (2.*ala - arho));
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}
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else
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{
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d2 = (alft - (2.*aksi - arho));
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}
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do
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{
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z = zmin + G4UniformRand() * (zmax - zmin);
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d1 = (1. - z);
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yf = std::pow(d1, d2);
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}
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while (G4UniformRand() > yf);
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}
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return z;
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}
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//*********************************************************************************************
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