Gabriele Cosmo
108 lines
3.6 KiB
C++
108 lines
3.6 KiB
C++
//
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// ********************************************************************
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// * DISCLAIMER *
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// * *
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// * The following disclaimer summarizes all the specific disclaimers *
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// * of contributors to this software. The specific disclaimers,which *
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// * govern, are listed with their locations in: *
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// * http://cern.ch/geant4/license *
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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. *
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// * *
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// * This code implementation is the intellectual property of the *
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// * GEANT4 collaboration. *
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// * By copying, distributing or modifying the Program (or any work *
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// * based on the Program) you indicate your acceptance of this *
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// * statement, and all its terms. *
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// ********************************************************************
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//
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//
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// $Id: G4NeutronHPAngularP.hh,v 1.7 2002/12/12 19:18:10 gunter Exp $
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// GEANT4 tag $Name: geant4-05-00 $
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//
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#ifndef G4NeutronHPAngularP_h
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#define G4NeutronHPAngularP_h 1
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#include "globals.hh"
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#include "G4InterpolationManager.hh"
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class G4NeutronHPAngularP
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{
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public:
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G4NeutronHPAngularP()
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{
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theCosTh = NULL;
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theProb = NULL;
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}
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~G4NeutronHPAngularP()
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{
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if(theCosTh!=NULL) delete [] theCosTh;
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if(theProb!=NULL) delete [] theProb;
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}
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inline void Init(G4std::ifstream & 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 *= eV;
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Init(eNeu, nProb);
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for (G4int iii=0; iii<nProb; iii++)
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{
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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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{
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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 = theInt.Interpolate(theManager.GetScheme(i), rand,
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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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G4NeutronHPInterpolator 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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