Gabriele Cosmo
94 lines
2.5 KiB
C++
94 lines
2.5 KiB
C++
// This code implementation is the intellectual property of
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// neutron_hp -- header file
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// J.P. Wellisch, Nov-1996
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// A prototype of the low energy neutron transport model.
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//
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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 statement,
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// and all its terms.
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//
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// $Id: G4NeutronHPAngularP.hh,v 1.4 1999/12/15 14:53:10 gunter Exp $
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// GEANT4 tag $Name: geant4-03-00 $
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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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