Gabriele Cosmo
112 lines
3.9 KiB
C++
112 lines
3.9 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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//
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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 G4ParticleHPAngularP_h
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#define G4ParticleHPAngularP_h 1
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#include "G4InterpolationManager.hh"
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#include "G4ParticleHPInterpolator.hh"
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#include "globals.hh"
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#include <CLHEP/Units/SystemOfUnits.h>
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class G4ParticleHPAngularP
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{
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public:
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G4ParticleHPAngularP()
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{
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theCosTh = nullptr;
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theProb = nullptr;
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theEnergy = 0.;
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nCoeff = 0;
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}
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~G4ParticleHPAngularP()
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{
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delete[] theCosTh;
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delete[] theProb;
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}
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inline void Init(std::istream& aDataFile)
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{
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G4double eNeu, cosTheta, probDist;
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G4int nProb;
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aDataFile >> eNeu >> nProb;
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theManager.Init(aDataFile);
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eNeu *= CLHEP::eV;
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Init(eNeu, nProb);
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for (G4int iii = 0; iii < nProb; iii++) {
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aDataFile >> cosTheta >> probDist;
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SetCosTh(iii, cosTheta);
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SetProb(iii, probDist);
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}
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}
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inline void Init(G4double e, G4int n)
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{
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theCosTh = new G4double[n];
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theProb = new G4double[n];
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theEnergy = e;
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nCoeff = n;
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}
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inline void SetEnergy(G4double energy) { theEnergy = energy; }
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inline void SetCosTh(G4int l, G4double coeff) { theCosTh[l] = coeff; }
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inline void SetProb(G4int l, G4double coeff) { theProb[l] = coeff; }
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inline G4double GetCosTh(G4int l) { return theCosTh[l]; }
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inline G4double GetProb(G4int l) { return theProb[l]; }
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inline G4double GetEnergy() { return theEnergy; }
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inline G4int GetNumberOfPoints() { return nCoeff; }
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inline G4double GetCosTh()
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{
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G4int i;
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G4double rand = G4UniformRand();
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G4double run = 0, runo = 0;
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for (i = 0; i < GetNumberOfPoints(); i++) {
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runo = run;
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run += GetProb(i);
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if (run > rand) break;
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}
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if (i == GetNumberOfPoints()) i--;
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G4double costh =
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theInt.Interpolate(theManager.GetScheme(i), rand, runo, run, GetCosTh(i - 1), GetCosTh(i));
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return costh;
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}
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private:
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G4double theEnergy; // neutron energy
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G4ParticleHPInterpolator theInt; // knows tointerpolate
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G4int nCoeff;
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G4InterpolationManager theManager; // knows the interpolation between stores
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G4double* theCosTh;
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G4double* theProb; // probability distribution as fcn of theta
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// integral normalised to 1.
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};
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#endif
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