Gabriele Cosmo
132 lines
4.7 KiB
C++
132 lines
4.7 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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// P. Arce, June-2014 Conversion neutron_hp to particle_hp
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//
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#ifndef G4ParticleHPEnergyDistribution_h
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#define G4ParticleHPEnergyDistribution_h 1
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#include "G4ParticleHPArbitaryTab.hh"
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#include "G4ParticleHPEvapSpectrum.hh"
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#include "G4ParticleHPFissionSpectrum.hh"
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#include "G4ParticleHPMadlandNixSpectrum.hh"
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#include "G4ParticleHPSimpleEvapSpectrum.hh"
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#include "G4ParticleHPWattSpectrum.hh"
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#include "G4VParticleHPEDis.hh"
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#include "G4ios.hh"
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#include "Randomize.hh"
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#include "globals.hh"
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#include <fstream>
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// we will need a List of these .... one per term.
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class G4ParticleHPEnergyDistribution
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{
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public:
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G4ParticleHPEnergyDistribution()
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{
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theEnergyDistribution = nullptr;
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theNumberOfPartials = 0;
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theRepresentationType = 0;
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}
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~G4ParticleHPEnergyDistribution()
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{
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if (theEnergyDistribution != nullptr) {
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for (G4int i = 0; i < theNumberOfPartials; i++) {
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delete theEnergyDistribution[i];
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}
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delete[] theEnergyDistribution;
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}
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}
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inline void Init(std::istream& theData)
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{
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G4double dummy;
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theData >> dummy >> theNumberOfPartials;
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theEnergyDistribution = new G4VParticleHPEDis*[theNumberOfPartials];
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for (G4int i = 0; i < theNumberOfPartials; i++) {
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theData >> theRepresentationType;
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switch (theRepresentationType) {
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case 1:
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theEnergyDistribution[i] = new G4ParticleHPArbitaryTab;
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break;
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case 5:
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theEnergyDistribution[i] = new G4ParticleHPEvapSpectrum;
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break;
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case 7:
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theEnergyDistribution[i] = new G4ParticleHPFissionSpectrum;
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break;
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case 9:
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theEnergyDistribution[i] = new G4ParticleHPSimpleEvapSpectrum;
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break;
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case 11:
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theEnergyDistribution[i] = new G4ParticleHPWattSpectrum;
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break;
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case 12:
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theEnergyDistribution[i] = new G4ParticleHPMadlandNixSpectrum;
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break;
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default:
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theEnergyDistribution[i] = new G4ParticleHPArbitaryTab;
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}
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theEnergyDistribution[i]->Init(theData);
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}
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}
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inline G4double Sample(G4double anEnergy, G4int& it)
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{
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G4double result = 0;
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it = 0;
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if (theNumberOfPartials != 0) {
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G4double sum = 0;
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auto running = new G4double[theNumberOfPartials];
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running[0] = 0;
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G4int i;
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for (i = 0; i < theNumberOfPartials; i++) {
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if (i != 0) running[i] = running[i - 1];
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running[i] += theEnergyDistribution[i]->GetFractionalProbability(anEnergy);
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}
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sum = running[theNumberOfPartials - 1];
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G4double random = G4UniformRand();
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for (i = 0; i < theNumberOfPartials; i++) {
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it = i;
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if (running[i] / sum > random) break;
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}
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delete[] running;
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if (it == theNumberOfPartials) it--;
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result = theEnergyDistribution[it]->Sample(anEnergy);
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}
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return result;
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}
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private:
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G4int theNumberOfPartials;
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G4int theRepresentationType;
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G4VParticleHPEDis** theEnergyDistribution;
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};
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#endif
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