Gabriele Cosmo
152 lines
4.4 KiB
C++
152 lines
4.4 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: G4NeutronHPInterpolator.hh,v 1.5 1999/12/15 14:53:12 gunter Exp $
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// GEANT4 tag $Name: geant4-03-00 $
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//
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#ifndef G4NeutronHPInterpolator_h
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#define G4NeutronHPInterpolator_h 1
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#include "globals.hh"
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#include "G4InterpolationScheme.hh"
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#include "Randomize.hh"
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#include "G4ios.hh"
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class G4NeutronHPInterpolator
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{
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public:
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G4NeutronHPInterpolator(){}
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~G4NeutronHPInterpolator()
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{
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// G4cout <<"deleted the interpolator"<<G4endl;
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}
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inline G4double Lin(G4double x,G4double x1,G4double x2,G4double y1,G4double y2)
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{
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G4double slope=0, off=0;
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slope = (y2-y1)/(x2-x1);
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off = y2-x2*slope;
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G4double y = x*slope+off;
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return y;
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}
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inline G4double Interpolate(G4InterpolationScheme aScheme,
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G4double x, G4double x1, G4double x2,
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G4double y1, G4double y2) const;
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G4double
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GetBinIntegral(const G4InterpolationScheme & aScheme,
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const G4double x1,const G4double x2,const G4double y1,const G4double y2);
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G4double
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GetWeightedBinIntegral(const G4InterpolationScheme & aScheme,
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const G4double x1,const G4double x2,const G4double y1,const G4double y2);
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private:
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inline G4double Histogram(G4double x, G4double x1, G4double x2, G4double y1, G4double y2) const;
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inline G4double LinearLinear(G4double x, G4double x1, G4double x2, G4double y1, G4double y2) const;
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inline G4double LinearLogarithmic(G4double x, G4double x1, G4double x2, G4double y1, G4double y2) const;
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inline G4double LogarithmicLinear(G4double x, G4double x1, G4double x2, G4double y1, G4double y2) const;
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inline G4double LogarithmicLogarithmic(G4double x, G4double x1, G4double x2, G4double y1, G4double y2) const;
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inline G4double Random(G4double x, G4double x1, G4double x2, G4double y1, G4double y2) const;
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};
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inline G4double G4NeutronHPInterpolator::
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Interpolate(G4InterpolationScheme aScheme,
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G4double x, G4double x1, G4double x2, G4double y1, G4double y2) const
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{
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G4double result;
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G4int theScheme = aScheme;
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theScheme = theScheme%CSTART;
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switch(theScheme)
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{
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case 1:
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result = Histogram(x, x1, x2, y1, y2);
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break;
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case 2:
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result = LinearLinear(x, x1, x2, y1, y2);
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break;
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case 3:
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result = LinearLogarithmic(x, x1, x2, y1, y2);
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break;
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case 4:
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result = LogarithmicLinear(x, x1, x2, y1, y2);
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break;
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case 5:
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result = LogarithmicLogarithmic(x, x1, x2, y1, y2);
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break;
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case 6:
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result = Random(x, x1, x2, y1, y2);
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break;
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default:
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G4cout << "theScheme = "<<theScheme<<G4endl;
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G4Exception("G4NeutronHPInterpolator::Carthesian Invalid InterpolationScheme");
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break;
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}
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return result;
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}
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inline G4double G4NeutronHPInterpolator::
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Histogram(G4double x, G4double x1, G4double x2, G4double y1, G4double y2) const
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{
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G4double result;
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result = y1;
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return result;
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}
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inline G4double G4NeutronHPInterpolator::
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LinearLinear(G4double x, G4double x1, G4double x2, G4double y1, G4double y2) const
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{
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G4double slope=0, off=0;
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slope = (y2-y1)/(x2-x1);
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off = y2-x2*slope;
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G4double y = x*slope+off;
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return y;
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}
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inline G4double G4NeutronHPInterpolator::
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LinearLogarithmic(G4double x, G4double x1, G4double x2, G4double y1, G4double y2) const
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{
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G4double result;
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result = LinearLinear(log(x), log(x1), log(x2), y1, y2);
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return result;
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}
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inline G4double G4NeutronHPInterpolator::
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LogarithmicLinear(G4double x, G4double x1, G4double x2, G4double y1, G4double y2) const
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{
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G4double result;
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result = LinearLinear(x, x1, x2, log(y1), log(y2));
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result = exp(result);
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return result;
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}
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inline G4double G4NeutronHPInterpolator::
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LogarithmicLogarithmic(G4double x, G4double x1, G4double x2, G4double y1, G4double y2) const
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{
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G4double result;
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result = LinearLinear(log(x), log(x1), log(x2), log(y1), log(y2));
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result = exp(result);
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return result;
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}
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inline G4double G4NeutronHPInterpolator::
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Random(G4double x, G4double x1, G4double x2, G4double y1, G4double y2) const
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{
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G4double result;
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result = y1+G4UniformRand()*(y2-y1);
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return result;
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}
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#endif
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